1	// Copyright (C) 2016 The Qt Company Ltd.
2	// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4	#include "qwindow.h"
5
6	#include <qpa/qplatformwindow.h>
7	#include <qpa/qplatformintegration.h>
8	#ifndef QT_NO_CONTEXTMENU
9	#include <qpa/qplatformtheme.h>
10	#endif
11	#include "qsurfaceformat.h"
12	#ifndef QT_NO_OPENGL
13	#include <qpa/qplatformopenglcontext.h>
14	#include "qopenglcontext.h"
15	#include "qopenglcontext_p.h"
16	#endif
17	#include "qscreen.h"
18
19	#include "qwindow_p.h"
20	#include "qguiapplication_p.h"
21	#if QT_CONFIG(accessibility)
22	# include "qaccessible.h"
23	#endif
24	#include "qhighdpiscaling_p.h"
25	#if QT_CONFIG(draganddrop)
26	#include "qshapedpixmapdndwindow_p.h"
27	#endif // QT_CONFIG(draganddrop)
28
29	#include <private/qevent_p.h>
30	#include <private/qeventpoint_p.h>
31	#include <private/qguiapplication_p.h>
32
33	#include <QtCore/QTimer>
34	#include <QtCore/QDebug>
35
36	#include <QStyleHints>
37	#include <qpa/qplatformcursor.h>
38	#include <qpa/qplatformwindow_p.h>
39
40	QT_BEGIN_NAMESPACE
41
42	Q_DECLARE_LOGGING_CATEGORY(lcPopup)
43
44	/*!
45	\class QWindow
46	\inmodule QtGui
47	\since 5.0
48	\brief The QWindow class represents a window in the underlying windowing system.
49
50	A window that is supplied a parent becomes a native child window of
51	their parent window.
52
53	An application will typically use QWidget or QQuickView for its UI, and not
54	QWindow directly. Still, it is possible to render directly to a QWindow
55	with QBackingStore or QOpenGLContext, when wanting to keep dependencies to
56	a minimum or when wanting to use OpenGL directly. The
57	\l{Raster Window Example} and \l{OpenGL Window Example}
58	are useful reference examples for how to render to a QWindow using
59	either approach.
60
61	\section1 Resource Management
62
63	Windows can potentially use a lot of memory. A usual measurement is
64	width times height times color depth. A window might also include multiple
65	buffers to support double and triple buffering, as well as depth and stencil
66	buffers. To release a window's memory resources, call the destroy() function.
67
68	\section1 Content Orientation
69
70	QWindow has reportContentOrientationChange() that can be used to specify
71	the layout of the window contents in relation to the screen. The content
72	orientation is simply a hint to the windowing system about which
73	orientation the window contents are in. It's useful when you wish to keep
74	the same window size, but rotate the contents instead, especially when
75	doing rotation animations between different orientations. The windowing
76	system might use this value to determine the layout of system popups or
77	dialogs.
78
79	\section1 Visibility and Windowing System Exposure
80
81	By default, the window is not visible, and you must call setVisible(true),
82	or show() or similar to make it visible. To make a window hidden again,
83	call setVisible(false) or hide(). The visible property describes the state
84	the application wants the window to be in. Depending on the underlying
85	system, a visible window might still not be shown on the screen. It could,
86	for instance, be covered by other opaque windows or moved outside the
87	physical area of the screen. On windowing systems that have exposure
88	notifications, the isExposed() accessor describes whether the window should
89	be treated as directly visible on screen. The exposeEvent() function is
90	called whenever an area of the window is invalidated, for example due to the
91	exposure in the windowing system changing. On windowing systems that do not
92	make this information visible to the application, isExposed() will simply
93	return the same value as isVisible().
94
95	QWindow::Visibility queried through visibility() is a convenience API
96	combining the functions of visible() and windowStates().
97
98	\section1 Rendering
99
100	There are two Qt APIs that can be used to render content into a window,
101	QBackingStore for rendering with a QPainter and flushing the contents
102	to a window with type QSurface::RasterSurface, and QOpenGLContext for
103	rendering with OpenGL to a window with type QSurface::OpenGLSurface.
104
105	The application can start rendering as soon as isExposed() returns \c true,
106	and can keep rendering until it isExposed() returns \c false. To find out when
107	isExposed() changes, reimplement exposeEvent(). The window will always get
108	a resize event before the first expose event.
109
110	\section1 Initial Geometry
111
112	If the window's width and height are left uninitialized, the window will
113	get a reasonable default geometry from the platform window. If the position
114	is left uninitialized, then the platform window will allow the windowing
115	system to position the window. For example on X11, the window manager
116	usually does some kind of smart positioning to try to avoid having new
117	windows completely obscure existing windows. However setGeometry()
118	initializes both the position and the size, so if you want a fixed size but
119	an automatic position, you should call resize() or setWidth() and
120	setHeight() instead.
121	*/
122
123	/*!
124	Creates a window as a top level on the \a targetScreen.
125
126	The window is not shown until setVisible(true), show(), or similar is called.
127
128	\sa setScreen()
129	*/
130	QWindow::QWindow(QScreen *targetScreen)
131	: QObject(*new QWindowPrivate(), nullptr)
132	, QSurface(QSurface::Window)
133	{
134	Q_D(QWindow);
135	d->init(parent: nullptr, targetScreen);
136	}
137
138	static QWindow *nonDesktopParent(QWindow *parent)
139	{
140	if (parent && parent->type() == Qt::Desktop) {
141	qWarning(msg: "QWindows cannot be reparented into desktop windows");
142	return nullptr;
143	}
144
145	return parent;
146	}
147
148	/*!
149	Creates a window as a child of the given \a parent window.
150
151	The window will be embedded inside the parent window, its coordinates
152	relative to the parent.
153
154	The screen is inherited from the parent.
155
156	\sa setParent()
157	*/
158	QWindow::QWindow(QWindow *parent)
159	: QWindow(*new QWindowPrivate(), parent)
160	{
161	}
162
163	/*!
164	Creates a window as a child of the given \a parent window with the \a dd
165	private implementation.
166
167	The window will be embedded inside the parent window, its coordinates
168	relative to the parent.
169
170	The screen is inherited from the parent.
171
172	\internal
173	\sa setParent()
174	*/
175	QWindow::QWindow(QWindowPrivate &dd, QWindow *parent)
176	: QObject(dd, nullptr)
177	, QSurface(QSurface::Window)
178	{
179	Q_D(QWindow);
180	d->init(parent: nonDesktopParent(parent));
181	}
182
183	/*!
184	Destroys the window.
185	*/
186	QWindow::~QWindow()
187	{
188	Q_D(QWindow);
189	d->destroy();
190	// Decouple from parent before window goes under
191	setParent(nullptr);
192	QGuiApplicationPrivate::window_list.removeAll(t: this);
193	QGuiApplicationPrivate::popup_list.removeAll(t: this);
194	if (!QGuiApplicationPrivate::is_app_closing)
195	QGuiApplicationPrivate::instance()->modalWindowList.removeOne(t: this);
196
197	// thse are normally cleared in destroy(), but the window may in
198	// some cases end up becoming the focus window again, or receive an enter
199	// event. Clear it again here as a workaround. See QTBUG-75326.
200	if (QGuiApplicationPrivate::focus_window == this)
201	QGuiApplicationPrivate::focus_window = nullptr;
202	if (QGuiApplicationPrivate::currentMouseWindow == this)
203	QGuiApplicationPrivate::currentMouseWindow = nullptr;
204	if (QGuiApplicationPrivate::currentMousePressWindow == this)
205	QGuiApplicationPrivate::currentMousePressWindow = nullptr;
206
207	d->isWindow = false;
208	}
209
210	QWindowPrivate::QWindowPrivate()
211	= default;
212
213	QWindowPrivate::~QWindowPrivate()
214	= default;
215
216	void QWindowPrivate::init(QWindow *parent, QScreen *targetScreen)
217	{
218	Q_Q(QWindow);
219
220	q->QObject::setParent(parent);
221
222	isWindow = true;
223	parentWindow = static_cast<QWindow *>(q->QObject::parent());
224
225	QScreen *connectScreen = targetScreen ? targetScreen : QGuiApplication::primaryScreen();
226
227	if (!parentWindow)
228	connectToScreen(topLevelScreen: connectScreen);
229
230	// If your application aborts here, you are probably creating a QWindow
231	// before the screen list is populated.
232	if (Q_UNLIKELY(!parentWindow && !topLevelScreen)) {
233	qFatal(msg: "Cannot create window: no screens available");
234	}
235	QGuiApplicationPrivate::window_list.prepend(t: q);
236
237	requestedFormat = QSurfaceFormat::defaultFormat();
238	devicePixelRatio = connectScreen->devicePixelRatio();
239
240	QObject::connect(sender: q, signal: &QWindow::screenChanged, context: q, slot: [q, this](QScreen *){
241	// We may have changed scaling; trigger resize event if needed,
242	// except on Windows, where we send resize events during WM_DPICHANGED
243	// event handling. FIXME: unify DPI change handling across all platforms.
244	#ifndef Q_OS_WIN
245	if (q->handle()) {
246	QWindowSystemInterfacePrivate::GeometryChangeEvent gce(q, QHighDpi::fromNativePixels(value: q->handle()->geometry(), context: q));
247	QGuiApplicationPrivate::processGeometryChangeEvent(e: &gce);
248	}
249	#else
250	Q_UNUSED(q);
251	#endif
252	updateDevicePixelRatio();
253	});
254
255	if (parentWindow) {
256	QChildWindowEvent childAddedEvent(QEvent::ChildWindowAdded, q);
257	QCoreApplication::sendEvent(receiver: parentWindow, event: &childAddedEvent);
258	}
259	}
260
261	/*!
262	\enum QWindow::Visibility
263	\since 5.1
264
265	This enum describes what part of the screen the window occupies or should
266	occupy.
267
268	\value Windowed The window occupies part of the screen, but not necessarily
269	the entire screen. This state will occur only on windowing systems which
270	support showing multiple windows simultaneously. In this state it is
271	possible for the user to move and resize the window manually, if
272	WindowFlags permit it and if it is supported by the windowing system.
273
274	\value Minimized The window is reduced to an entry or icon on the task bar,
275	dock, task list or desktop, depending on how the windowing system handles
276	minimized windows.
277
278	\value Maximized The window occupies one entire screen, and the titlebar is
279	still visible. On most windowing systems this is the state achieved by
280	clicking the maximize button on the toolbar.
281
282	\value FullScreen The window occupies one entire screen, is not resizable,
283	and there is no titlebar. On some platforms which do not support showing
284	multiple simultaneous windows, this can be the usual visibility when the
285	window is not hidden.
286
287	\value AutomaticVisibility This means to give the window a default visible
288	state, which might be fullscreen or windowed depending on the platform.
289	It can be given as a parameter to setVisibility but will never be
290	read back from the visibility accessor.
291
292	\value Hidden The window is not visible in any way, however it may remember
293	a latent visibility which can be restored by setting AutomaticVisibility.
294	*/
295
296	/*!
297	\property QWindow::visibility
298	\brief the screen-occupation state of the window
299	\since 5.1
300
301	Visibility is whether the window should appear in the windowing system as
302	normal, minimized, maximized, fullscreen or hidden.
303
304	To set the visibility to AutomaticVisibility means to give the window
305	a default visible state, which might be fullscreen or windowed depending on
306	the platform.
307	When reading the visibility property you will always get the actual state,
308	never AutomaticVisibility.
309	*/
310	QWindow::Visibility QWindow::visibility() const
311	{
312	Q_D(const QWindow);
313	return d->visibility;
314	}
315
316	void QWindow::setVisibility(Visibility v)
317	{
318	switch (v) {
319	case Hidden:
320	hide();
321	break;
322	case AutomaticVisibility:
323	show();
324	break;
325	case Windowed:
326	showNormal();
327	break;
328	case Minimized:
329	showMinimized();
330	break;
331	case Maximized:
332	showMaximized();
333	break;
334	case FullScreen:
335	showFullScreen();
336	break;
337	default:
338	Q_ASSERT(false);
339	}
340	}
341
342	/*
343	Subclasses may override this function to run custom setVisible
344	logic. Subclasses that do so must call the base class implementation
345	at some point to make the native window visible, and must not
346	call QWindow::setVisble() since that will recurse back here.
347	*/
348	void QWindowPrivate::setVisible(bool visible)
349	{
350	Q_Q(QWindow);
351
352	if (this->visible != visible) {
353	this->visible = visible;
354	emit q->visibleChanged(arg: visible);
355	updateVisibility();
356	} else if (platformWindow) {
357	// Visibility hasn't changed, and the platform window is in sync
358	return;
359	}
360
361	if (!platformWindow) {
362	// If we have a parent window, but the parent hasn't been created yet, we
363	// can defer creation until the parent is created or we're re-parented.
364	if (parentWindow && !parentWindow->handle())
365	return;
366
367	// We only need to create the window if it's being shown
368	if (visible) {
369	// FIXME: At this point we've already updated the visible state of
370	// the QWindow, so if the platform layer reads the window state during
371	// creation, and reflects that in the native window, it will end up
372	// with a visible window. This may in turn result in resize or expose
373	// events from the platform before we have sent the show event below.
374	q->create();
375	}
376	}
377
378	if (visible) {
379	// remove posted quit events when showing a new window
380	QCoreApplication::removePostedEvents(qApp, eventType: QEvent::Quit);
381
382	if (q->type() == Qt::Window) {
383	QGuiApplicationPrivate *app_priv = QGuiApplicationPrivate::instance();
384	QString &firstWindowTitle = app_priv->firstWindowTitle;
385	if (!firstWindowTitle.isEmpty()) {
386	q->setTitle(firstWindowTitle);
387	firstWindowTitle = QString();
388	}
389	if (!app_priv->forcedWindowIcon.isNull())
390	q->setIcon(app_priv->forcedWindowIcon);
391
392	// Handling of the -qwindowgeometry, -geometry command line arguments
393	static bool geometryApplied = false;
394	if (!geometryApplied) {
395	geometryApplied = true;
396	QGuiApplicationPrivate::applyWindowGeometrySpecificationTo(window: q);
397	}
398	}
399
400	QShowEvent showEvent;
401	QGuiApplication::sendEvent(receiver: q, event: &showEvent);
402	}
403
404	if (q->isModal()) {
405	if (visible)
406	QGuiApplicationPrivate::showModalWindow(window: q);
407	else
408	QGuiApplicationPrivate::hideModalWindow(window: q);
409	// QShapedPixmapWindow is used on some platforms for showing a drag pixmap, so don't block
410	// input to this window as it is performing a drag - QTBUG-63846
411	} else if (visible && QGuiApplication::modalWindow()
412	#if QT_CONFIG(draganddrop)
413	&& !qobject_cast<QShapedPixmapWindow *>(object: q)
414	#endif // QT_CONFIG(draganddrop)
415	) {
416	QGuiApplicationPrivate::updateBlockedStatus(window: q);
417	}
418
419	if (q->type() == Qt::Popup) {
420	if (visible)
421	QGuiApplicationPrivate::activatePopup(popup: q);
422	else
423	QGuiApplicationPrivate::closePopup(popup: q);
424	}
425
426	#ifndef QT_NO_CURSOR
427	if (visible && (hasCursor || QGuiApplication::overrideCursor()))
428	applyCursor();
429	#endif
430
431	if (platformWindow)
432	platformWindow->setVisible(visible);
433
434	if (!visible) {
435	QHideEvent hideEvent;
436	QGuiApplication::sendEvent(receiver: q, event: &hideEvent);
437	}
438	}
439
440	void QWindowPrivate::updateVisibility()
441	{
442	Q_Q(QWindow);
443
444	QWindow::Visibility old = visibility;
445
446	if (!visible)
447	visibility = QWindow::Hidden;
448	else if (windowState & Qt::WindowMinimized)
449	visibility = QWindow::Minimized;
450	else if (windowState & Qt::WindowFullScreen)
451	visibility = QWindow::FullScreen;
452	else if (windowState & Qt::WindowMaximized)
453	visibility = QWindow::Maximized;
454	else
455	visibility = QWindow::Windowed;
456
457	if (visibility != old)
458	emit q->visibilityChanged(visibility);
459	}
460
461	void QWindowPrivate::updateSiblingPosition(SiblingPosition position)
462	{
463	Q_Q(QWindow);
464
465	if (!q->parent())
466	return;
467
468	QObjectList &siblings = q->parent()->d_ptr->children;
469
470	const qsizetype siblingCount = siblings.size() - 1;
471	if (siblingCount == 0)
472	return;
473
474	const qsizetype currentPosition = siblings.indexOf(t: q);
475	Q_ASSERT(currentPosition >= 0);
476
477	const qsizetype targetPosition = position == PositionTop ? siblingCount : 0;
478
479	if (currentPosition == targetPosition)
480	return;
481
482	siblings.move(from: currentPosition, to: targetPosition);
483	}
484
485	bool QWindowPrivate::windowRecreationRequired(QScreen *newScreen) const
486	{
487	Q_Q(const QWindow);
488	const QScreen *oldScreen = q->screen();
489	return oldScreen != newScreen && (platformWindow || !oldScreen)
490	&& !(oldScreen && oldScreen->virtualSiblings().contains(t: newScreen));
491	}
492
493	void QWindowPrivate::disconnectFromScreen()
494	{
495	if (topLevelScreen)
496	topLevelScreen = nullptr;
497	}
498
499	void QWindowPrivate::connectToScreen(QScreen *screen)
500	{
501	disconnectFromScreen();
502	topLevelScreen = screen;
503	}
504
505	void QWindowPrivate::emitScreenChangedRecursion(QScreen *newScreen)
506	{
507	Q_Q(QWindow);
508	emit q->screenChanged(screen: newScreen);
509	for (QObject *child : q->children()) {
510	if (child->isWindowType())
511	static_cast<QWindow *>(child)->d_func()->emitScreenChangedRecursion(newScreen);
512	}
513	}
514
515	void QWindowPrivate::setTopLevelScreen(QScreen *newScreen, bool recreate)
516	{
517	Q_Q(QWindow);
518	if (parentWindow) {
519	qWarning() << q << '(' << newScreen << "): Attempt to set a screen on a child window.";
520	return;
521	}
522	if (newScreen != topLevelScreen) {
523	const bool shouldRecreate = recreate && windowRecreationRequired(newScreen);
524	const bool shouldShow = visibilityOnDestroy && !topLevelScreen;
525	if (shouldRecreate && platformWindow)
526	q->destroy();
527	connectToScreen(screen: newScreen);
528	if (shouldShow)
529	q->setVisible(true);
530	else if (newScreen && shouldRecreate)
531	create(recursive: true);
532	emitScreenChangedRecursion(newScreen);
533	}
534	}
535
536	static constexpr auto kForeignWindowId = "_q_foreignWinId";
537
538	void QWindowPrivate::create(bool recursive)
539	{
540	Q_Q(QWindow);
541	if (platformWindow)
542	return;
543
544	// avoid losing update requests when re-creating
545	const bool needsUpdate = updateRequestPending;
546	// the platformWindow, if there was one, is now gone, so make this flag reflect reality now
547	updateRequestPending = false;
548
549	if (q->parent())
550	q->parent()->create();
551
552	if (platformWindow) {
553	// Creating the parent window will end up creating any child window
554	// that was already visible, via setVisible. If this applies to us,
555	// we will already have a platform window at this point.
556	return;
557	}
558
559	// QPlatformWindow will poll geometry() during construction below. Set the
560	// screen here so that high-dpi scaling will use the correct scale factor.
561	if (q->isTopLevel()) {
562	if (QScreen *screen = screenForGeometry(rect: geometry))
563	setTopLevelScreen(newScreen: screen, recreate: false);
564	}
565
566	const WId nativeHandle = q->property(name: kForeignWindowId).value<WId>();
567
568	QPlatformIntegration *platformIntegration = QGuiApplicationPrivate::platformIntegration();
569	platformWindow = nativeHandle ? platformIntegration->createForeignWindow(q, nativeHandle)
570	: platformIntegration->createPlatformWindow(window: q);
571	Q_ASSERT(platformWindow);
572
573	if (!platformWindow) {
574	qWarning() << "Failed to create platform window for" << q << "with flags" << q->flags();
575	return;
576	}
577
578	platformWindow->initialize();
579
580	QObjectList childObjects = q->children();
581	for (int i = 0; i < childObjects.size(); i ++) {
582	QObject *object = childObjects.at(i);
583	if (!object->isWindowType())
584	continue;
585
586	QWindow *childWindow = static_cast<QWindow *>(object);
587	if (recursive)
588	childWindow->d_func()->create(recursive);
589
590	// The child may have had deferred creation due to this window not being created
591	// at the time setVisible was called, so we re-apply the visible state, which
592	// may result in creating the child, and emitting the appropriate signals.
593	if (childWindow->isVisible())
594	childWindow->setVisible(true);
595
596	if (QPlatformWindow *childPlatformWindow = childWindow->d_func()->platformWindow)
597	childPlatformWindow->setParent(this->platformWindow);
598	}
599
600	QPlatformSurfaceEvent e(QPlatformSurfaceEvent::SurfaceCreated);
601	QGuiApplication::sendEvent(receiver: q, event: &e);
602
603	updateDevicePixelRatio();
604
605	if (needsUpdate)
606	q->requestUpdate();
607	}
608
609	void QWindowPrivate::clearFocusObject()
610	{
611	}
612
613	// Allows for manipulating the suggested geometry before a resize/move
614	// event in derived classes for platforms that support it, for example to
615	// implement heightForWidth().
616	QRectF QWindowPrivate::closestAcceptableGeometry(const QRectF &rect) const
617	{
618	Q_UNUSED(rect);
619	return QRectF();
620	}
621
622	void QWindowPrivate::setMinOrMaxSize(QSize *oldSizeMember, const QSize &size,
623	qxp::function_ref<void()> funcWidthChanged,
624	qxp::function_ref<void()> funcHeightChanged)
625	{
626	Q_Q(QWindow);
627	Q_ASSERT(oldSizeMember);
628	const QSize adjustedSize =
629	size.expandedTo(otherSize: QSize(0, 0)).boundedTo(otherSize: QSize(QWINDOWSIZE_MAX, QWINDOWSIZE_MAX));
630	if (*oldSizeMember == adjustedSize)
631	return;
632	const bool widthChanged = adjustedSize.width() != oldSizeMember->width();
633	const bool heightChanged = adjustedSize.height() != oldSizeMember->height();
634	*oldSizeMember = adjustedSize;
635
636	if (platformWindow && q->isTopLevel())
637	platformWindow->propagateSizeHints();
638
639	if (widthChanged)
640	funcWidthChanged();
641	if (heightChanged)
642	funcHeightChanged();
643
644	// resize window if current size is outside of min and max limits
645	if (minimumSize.width() <= maximumSize.width()
646	|| minimumSize.height() <= maximumSize.height()) {
647	const QSize currentSize = q->size();
648	const QSize boundedSize = currentSize.expandedTo(otherSize: minimumSize).boundedTo(otherSize: maximumSize);
649	q->resize(newSize: boundedSize);
650	}
651	}
652
653	/*!
654	Sets the \a surfaceType of the window.
655
656	Specifies whether the window is meant for raster rendering with
657	QBackingStore, or OpenGL rendering with QOpenGLContext.
658
659	The surfaceType will be used when the native surface is created
660	in the create() function. Calling this function after the native
661	surface has been created requires calling destroy() and create()
662	to release the old native surface and create a new one.
663
664	\sa QBackingStore, QOpenGLContext, create(), destroy()
665	*/
666	void QWindow::setSurfaceType(SurfaceType surfaceType)
667	{
668	Q_D(QWindow);
669	d->surfaceType = surfaceType;
670	}
671
672	/*!
673	Returns the surface type of the window.
674
675	\sa setSurfaceType()
676	*/
677	QWindow::SurfaceType QWindow::surfaceType() const
678	{
679	Q_D(const QWindow);
680	return d->surfaceType;
681	}
682
683	/*!
684	\property QWindow::visible
685	\brief whether the window is visible or not
686
687	This property controls the visibility of the window in the windowing system.
688
689	By default, the window is not visible, you must call setVisible(true), or
690	show() or similar to make it visible.
691
692	\note Hiding a window does not remove the window from the windowing system,
693	it only hides it. On windowing systems that give full screen applications a
694	dedicated desktop (such as macOS), hiding a full screen window will not remove
695	that desktop, but leave it blank. Another window from the same application
696	might be shown full screen, and will fill that desktop. Use QWindow::close to
697	completely remove a window from the windowing system.
698
699	\sa show()
700	*/
701	void QWindow::setVisible(bool visible)
702	{
703	Q_D(QWindow);
704
705	d->setVisible(visible);
706	}
707
708	bool QWindow::isVisible() const
709	{
710	Q_D(const QWindow);
711
712	return d->visible;
713	}
714
715	/*!
716	Allocates the platform resources associated with the window.
717
718	It is at this point that the surface format set using setFormat() gets resolved
719	into an actual native surface. However, the window remains hidden until setVisible() is called.
720
721	Note that it is not usually necessary to call this function directly, as it will be implicitly
722	called by show(), setVisible(), winId(), and other functions that require access to the platform
723	resources.
724
725	Call destroy() to free the platform resources if necessary.
726
727	\sa destroy()
728	*/
729	void QWindow::create()
730	{
731	Q_D(QWindow);
732	d->create(recursive: false);
733	}
734
735	/*!
736	Returns the window's platform id.
737
738	\note This function will cause the platform window to be created if it is not already.
739	Returns 0, if the platform window creation failed.
740
741	For platforms where this id might be useful, the value returned
742	will uniquely represent the window inside the corresponding screen.
743
744	\sa screen()
745	*/
746	WId QWindow::winId() const
747	{
748	Q_D(const QWindow);
749
750	if (!d->platformWindow)
751	const_cast<QWindow *>(this)->create();
752
753	if (!d->platformWindow)
754	return 0;
755
756	return d->platformWindow->winId();
757	}
758
759	/*!
760	Returns the parent window, if any.
761
762	If \a mode is IncludeTransients, then the transient parent is returned
763	if there is no parent.
764
765	A window without a parent is known as a top level window.
766
767	\since 5.9
768	*/
769	QWindow *QWindow::parent(AncestorMode mode) const
770	{
771	Q_D(const QWindow);
772	return d->parentWindow ? d->parentWindow : (mode == IncludeTransients ? transientParent() : nullptr);
773	}
774
775	/*!
776	Sets the \a parent Window. This will lead to the windowing system managing
777	the clip of the window, so it will be clipped to the \a parent window.
778
779	Setting \a parent to be \nullptr will make the window become a top level
780	window.
781
782	If \a parent is a window created by fromWinId(), then the current window
783	will be embedded inside \a parent, if the platform supports it.
784	*/
785	void QWindow::setParent(QWindow *parent)
786	{
787	parent = nonDesktopParent(parent);
788
789	Q_D(QWindow);
790	if (d->parentWindow == parent)
791	return;
792
793	QScreen *newScreen = parent ? parent->screen() : screen();
794	if (d->windowRecreationRequired(newScreen)) {
795	qWarning() << this << '(' << parent << "): Cannot change screens (" << screen() << newScreen << ')';
796	return;
797	}
798
799	QEvent parentAboutToChangeEvent(QEvent::ParentWindowAboutToChange);
800	QCoreApplication::sendEvent(receiver: this, event: &parentAboutToChangeEvent);
801
802	const auto previousParent = d->parentWindow;
803	QObject::setParent(parent);
804	d->parentWindow = parent;
805
806	if (parent)
807	d->disconnectFromScreen();
808	else
809	d->connectToScreen(screen: newScreen);
810
811	// If we were set visible, but not created because we were a child, and we're now
812	// re-parented into a created parent, or to being a top level, we need re-apply the
813	// visibility state, which will also create.
814	if (isVisible() && (!parent || parent->handle()))
815	setVisible(true);
816
817	if (d->platformWindow) {
818	if (parent)
819	parent->create();
820
821	d->platformWindow->setParent(parent ? parent->d_func()->platformWindow : nullptr);
822	}
823
824	QGuiApplicationPrivate::updateBlockedStatus(window: this);
825
826	if (previousParent) {
827	QChildWindowEvent childRemovedEvent(QEvent::ChildWindowRemoved, this);
828	QCoreApplication::sendEvent(receiver: previousParent, event: &childRemovedEvent);
829	}
830
831	if (parent) {
832	QChildWindowEvent childAddedEvent(QEvent::ChildWindowAdded, this);
833	QCoreApplication::sendEvent(receiver: parent, event: &childAddedEvent);
834	}
835
836	QEvent parentChangedEvent(QEvent::ParentWindowChange);
837	QCoreApplication::sendEvent(receiver: this, event: &parentChangedEvent);
838	}
839
840	/*!
841	Returns whether the window is top level, i.e. has no parent window.
842	*/
843	bool QWindow::isTopLevel() const
844	{
845	Q_D(const QWindow);
846	return d->parentWindow == nullptr;
847	}
848
849	/*!
850	Returns whether the window is modal.
851
852	A modal window prevents other windows from getting any input.
853
854	\sa QWindow::modality
855	*/
856	bool QWindow::isModal() const
857	{
858	Q_D(const QWindow);
859	return d->modality != Qt::NonModal;
860	}
861
862	/*! \property QWindow::modality
863	\brief the modality of the window
864
865	A modal window prevents other windows from receiving input events. Qt
866	supports two types of modality: Qt::WindowModal and Qt::ApplicationModal.
867
868	By default, this property is Qt::NonModal
869
870	\sa Qt::WindowModality
871	*/
872
873	Qt::WindowModality QWindow::modality() const
874	{
875	Q_D(const QWindow);
876	return d->modality;
877	}
878
879	void QWindow::setModality(Qt::WindowModality modality)
880	{
881	Q_D(QWindow);
882	if (d->modality == modality)
883	return;
884	d->modality = modality;
885	emit modalityChanged(modality);
886	}
887
888	/*! \fn void QWindow::modalityChanged(Qt::WindowModality modality)
889
890	This signal is emitted when the Qwindow::modality property changes to \a modality.
891	*/
892
893	/*!
894	Sets the window's surface \a format.
895
896	The format determines properties such as color depth, alpha, depth and
897	stencil buffer size, etc. For example, to give a window a transparent
898	background (provided that the window system supports compositing, and
899	provided that other content in the window does not make it opaque again):
900
901	\code
902	QSurfaceFormat format;
903	format.setAlphaBufferSize(8);
904	window.setFormat(format);
905	\endcode
906
907	The surface format will be resolved in the create() function. Calling
908	this function after create() has been called will not re-resolve the
909	surface format of the native surface.
910
911	When the format is not explicitly set via this function, the format returned
912	by QSurfaceFormat::defaultFormat() will be used. This means that when having
913	multiple windows, individual calls to this function can be replaced by one
914	single call to QSurfaceFormat::setDefaultFormat() before creating the first
915	window.
916
917	\sa create(), destroy(), QSurfaceFormat::setDefaultFormat()
918	*/
919	void QWindow::setFormat(const QSurfaceFormat &format)
920	{
921	Q_D(QWindow);
922	d->requestedFormat = format;
923	}
924
925	/*!
926	Returns the requested surface format of this window.
927
928	If the requested format was not supported by the platform implementation,
929	the requestedFormat will differ from the actual window format.
930
931	This is the value set with setFormat().
932
933	\sa setFormat(), format()
934	*/
935	QSurfaceFormat QWindow::requestedFormat() const
936	{
937	Q_D(const QWindow);
938	return d->requestedFormat;
939	}
940
941	/*!
942	Returns the actual format of this window.
943
944	After the window has been created, this function will return the actual surface format
945	of the window. It might differ from the requested format if the requested format could
946	not be fulfilled by the platform. It might also be a superset, for example certain
947	buffer sizes may be larger than requested.
948
949	\note Depending on the platform, certain values in this surface format may still
950	contain the requested values, that is, the values that have been passed to
951	setFormat(). Typical examples are the OpenGL version, profile and options. These may
952	not get updated during create() since these are context specific and a single window
953	may be used together with multiple contexts over its lifetime. Use the
954	QOpenGLContext's format() instead to query such values.
955
956	\sa create(), requestedFormat(), QOpenGLContext::format()
957	*/
958	QSurfaceFormat QWindow::format() const
959	{
960	Q_D(const QWindow);
961	if (d->platformWindow)
962	return d->platformWindow->format();
963	return d->requestedFormat;
964	}
965
966	/*!
967	\property QWindow::flags
968	\brief the window flags of the window
969
970	The window flags control the window's appearance in the windowing system,
971	whether it's a dialog, popup, or a regular window, and whether it should
972	have a title bar, etc.
973
974	The actual window flags might differ from the flags set with setFlags()
975	if the requested flags could not be fulfilled.
976
977	\sa setFlag()
978	*/
979	void QWindow::setFlags(Qt::WindowFlags flags)
980	{
981	Q_D(QWindow);
982	if (d->windowFlags == flags)
983	return;
984
985	if (d->platformWindow)
986	d->platformWindow->setWindowFlags(flags);
987	d->windowFlags = flags;
988	}
989
990	Qt::WindowFlags QWindow::flags() const
991	{
992	Q_D(const QWindow);
993	Qt::WindowFlags flags = d->windowFlags;
994
995	if (d->platformWindow && d->platformWindow->isForeignWindow())
996	flags |= Qt::ForeignWindow;
997
998	return flags;
999	}
1000
1001	/*!
1002	\since 5.9
1003
1004	Sets the window flag \a flag on this window if \a on is true;
1005	otherwise clears the flag.
1006
1007	\sa setFlags(), flags(), type()
1008	*/
1009	void QWindow::setFlag(Qt::WindowType flag, bool on)
1010	{
1011	Q_D(QWindow);
1012	if (on)
1013	setFlags(d->windowFlags | flag);
1014	else
1015	setFlags(d->windowFlags & ~flag);
1016	}
1017
1018	/*!
1019	Returns the type of the window.
1020
1021	This returns the part of the window flags that represents
1022	whether the window is a dialog, tooltip, popup, regular window, etc.
1023
1024	\sa flags(), setFlags()
1025	*/
1026	Qt::WindowType QWindow::type() const
1027	{
1028	return static_cast<Qt::WindowType>(int(flags() & Qt::WindowType_Mask));
1029	}
1030
1031	/*!
1032	\property QWindow::title
1033	\brief the window's title in the windowing system
1034
1035	The window title might appear in the title area of the window decorations,
1036	depending on the windowing system and the window flags. It might also
1037	be used by the windowing system to identify the window in other contexts,
1038	such as in the task switcher.
1039
1040	\sa flags()
1041	*/
1042	void QWindow::setTitle(const QString &title)
1043	{
1044	Q_D(QWindow);
1045	bool changed = false;
1046	if (d->windowTitle != title) {
1047	d->windowTitle = title;
1048	changed = true;
1049	}
1050	if (d->platformWindow && type() != Qt::Desktop)
1051	d->platformWindow->setWindowTitle(title);
1052	if (changed)
1053	emit windowTitleChanged(title);
1054	}
1055
1056	QString QWindow::title() const
1057	{
1058	Q_D(const QWindow);
1059	return d->windowTitle;
1060	}
1061
1062	/*!
1063	\brief set the file name this window is representing.
1064
1065	The windowing system might use \a filePath to display the
1066	path of the document this window is representing in the tile bar.
1067
1068	*/
1069	void QWindow::setFilePath(const QString &filePath)
1070	{
1071	Q_D(QWindow);
1072	d->windowFilePath = filePath;
1073	if (d->platformWindow)
1074	d->platformWindow->setWindowFilePath(filePath);
1075	}
1076
1077	/*!
1078	\brief the file name this window is representing.
1079
1080	\sa setFilePath()
1081	*/
1082	QString QWindow::filePath() const
1083	{
1084	Q_D(const QWindow);
1085	return d->windowFilePath;
1086	}
1087
1088	/*!
1089	\brief Sets the window's \a icon in the windowing system
1090
1091	The window icon might be used by the windowing system for example to
1092	decorate the window, and/or in the task switcher.
1093
1094	\note On \macos, the window title bar icon is meant for windows representing
1095	documents, and will only show up if a file path is also set.
1096
1097	\sa setFilePath()
1098	*/
1099	void QWindow::setIcon(const QIcon &icon)
1100	{
1101	Q_D(QWindow);
1102	d->windowIcon = icon;
1103	if (d->platformWindow)
1104	d->platformWindow->setWindowIcon(icon);
1105	QEvent e(QEvent::WindowIconChange);
1106	QCoreApplication::sendEvent(receiver: this, event: &e);
1107	}
1108
1109	/*!
1110	\brief Returns the window's icon in the windowing system
1111
1112	\sa setIcon()
1113	*/
1114	QIcon QWindow::icon() const
1115	{
1116	Q_D(const QWindow);
1117	if (d->windowIcon.isNull())
1118	return QGuiApplication::windowIcon();
1119	return d->windowIcon;
1120	}
1121
1122	/*!
1123	Raise the window in the windowing system.
1124
1125	Requests that the window be raised to appear above other windows.
1126	*/
1127	void QWindow::raise()
1128	{
1129	Q_D(QWindow);
1130
1131	d->updateSiblingPosition(position: QWindowPrivate::PositionTop);
1132
1133	if (d->platformWindow)
1134	d->platformWindow->raise();
1135	}
1136
1137	/*!
1138	Lower the window in the windowing system.
1139
1140	Requests that the window be lowered to appear below other windows.
1141	*/
1142	void QWindow::lower()
1143	{
1144	Q_D(QWindow);
1145
1146	d->updateSiblingPosition(position: QWindowPrivate::PositionBottom);
1147
1148	if (d->platformWindow)
1149	d->platformWindow->lower();
1150	}
1151
1152	/*!
1153	\brief Start a system-specific resize operation
1154	\since 5.15
1155
1156	Calling this will start an interactive resize operation on the window by platforms
1157	that support it. The actual behavior may vary depending on the platform. Usually,
1158	it will make the window resize so that its edge follows the mouse cursor.
1159
1160	On platforms that support it, this method of resizing windows is preferred over
1161	\c setGeometry, because it allows a more native look and feel of resizing windows, e.g.
1162	letting the window manager snap this window against other windows, or special resizing
1163	behavior with animations when dragged to the edge of the screen.
1164
1165	\a edges should either be a single edge, or two adjacent edges (a corner). Other values
1166	are not allowed.
1167
1168	Returns true if the operation was supported by the system.
1169	*/
1170	bool QWindow::startSystemResize(Qt::Edges edges)
1171	{
1172	Q_D(QWindow);
1173	if (Q_UNLIKELY(!isVisible() || !d->platformWindow || d->maximumSize == d->minimumSize))
1174	return false;
1175
1176	const bool isSingleEdge = edges == Qt::TopEdge || edges == Qt::RightEdge || edges == Qt::BottomEdge || edges == Qt::LeftEdge;
1177	const bool isCorner =
1178	edges == (Qt::TopEdge | Qt::LeftEdge) ||
1179	edges == (Qt::TopEdge | Qt::RightEdge) ||
1180	edges == (Qt::BottomEdge | Qt::RightEdge) ||
1181	edges == (Qt::BottomEdge | Qt::LeftEdge);
1182
1183	if (Q_UNLIKELY(!isSingleEdge && !isCorner)) {
1184	qWarning() << "Invalid edges" << edges << "passed to QWindow::startSystemResize, ignoring.";
1185	return false;
1186	}
1187
1188	return d->platformWindow->startSystemResize(edges);
1189	}
1190
1191	/*!
1192	\brief Start a system-specific move operation
1193	\since 5.15
1194
1195	Calling this will start an interactive move operation on the window by platforms
1196	that support it. The actual behavior may vary depending on the platform. Usually,
1197	it will make the window follow the mouse cursor until a mouse button is released.
1198
1199	On platforms that support it, this method of moving windows is preferred over
1200	\c setPosition, because it allows a more native look-and-feel of moving windows, e.g.
1201	letting the window manager snap this window against other windows, or special tiling
1202	or resizing behavior with animations when dragged to the edge of the screen.
1203	Furthermore, on some platforms such as Wayland, \c setPosition is not supported, so
1204	this is the only way the application can influence its position.
1205
1206	Returns true if the operation was supported by the system.
1207	*/
1208	bool QWindow::startSystemMove()
1209	{
1210	Q_D(QWindow);
1211	if (Q_UNLIKELY(!isVisible() || !d->platformWindow))
1212	return false;
1213
1214	return d->platformWindow->startSystemMove();
1215	}
1216
1217	/*!
1218	\property QWindow::opacity
1219	\brief The opacity of the window in the windowing system.
1220	\since 5.1
1221
1222	If the windowing system supports window opacity, this can be used to fade the
1223	window in and out, or to make it semitransparent.
1224
1225	A value of 1.0 or above is treated as fully opaque, whereas a value of 0.0 or below
1226	is treated as fully transparent. Values inbetween represent varying levels of
1227	translucency between the two extremes.
1228
1229	The default value is 1.0.
1230	*/
1231	void QWindow::setOpacity(qreal level)
1232	{
1233	Q_D(QWindow);
1234	if (level == d->opacity)
1235	return;
1236	d->opacity = level;
1237	if (d->platformWindow) {
1238	d->platformWindow->setOpacity(level);
1239	emit opacityChanged(opacity: level);
1240	}
1241	}
1242
1243	qreal QWindow::opacity() const
1244	{
1245	Q_D(const QWindow);
1246	return d->opacity;
1247	}
1248
1249	/*!
1250	Sets the mask of the window.
1251
1252	The mask is a hint to the windowing system that the application does not
1253	want to receive mouse or touch input outside the given \a region.
1254
1255	The window manager may or may not choose to display any areas of the window
1256	not included in the mask, thus it is the application's responsibility to
1257	clear to transparent the areas that are not part of the mask.
1258	*/
1259	void QWindow::setMask(const QRegion &region)
1260	{
1261	Q_D(QWindow);
1262	if (d->platformWindow)
1263	d->platformWindow->setMask(QHighDpi::toNativeLocalRegion(pointRegion: region, window: this));
1264	d->mask = region;
1265	}
1266
1267	/*!
1268	Returns the mask set on the window.
1269
1270	The mask is a hint to the windowing system that the application does not
1271	want to receive mouse or touch input outside the given region.
1272	*/
1273	QRegion QWindow::mask() const
1274	{
1275	Q_D(const QWindow);
1276	return d->mask;
1277	}
1278
1279	/*!
1280	Requests the window to be activated, i.e. receive keyboard focus.
1281
1282	\sa isActive(), QGuiApplication::focusWindow()
1283	*/
1284	void QWindow::requestActivate()
1285	{
1286	Q_D(QWindow);
1287	if (flags() & Qt::WindowDoesNotAcceptFocus) {
1288	qWarning() << "requestActivate() called for " << this << " which has Qt::WindowDoesNotAcceptFocus set.";
1289	return;
1290	}
1291	if (d->platformWindow)
1292	d->platformWindow->requestActivateWindow();
1293	}
1294
1295	/*!
1296	Returns if this window is exposed in the windowing system.
1297
1298	When the window is not exposed, it is shown by the application
1299	but it is still not showing in the windowing system, so the application
1300	should minimize animations and other graphical activities.
1301
1302	An exposeEvent() is sent every time this value changes.
1303
1304	\sa exposeEvent()
1305	*/
1306	bool QWindow::isExposed() const
1307	{
1308	Q_D(const QWindow);
1309	return d->exposed;
1310	}
1311
1312	/*!
1313	\property QWindow::active
1314	\brief the active status of the window
1315	\since 5.1
1316
1317	\sa requestActivate()
1318	*/
1319
1320	/*!
1321	Returns \c true if the window is active.
1322
1323	This is the case for the window that has input focus as well as windows
1324	that are in the same parent / transient parent chain as the focus window.
1325
1326	Typically active windows should appear active from a style perspective.
1327
1328	To get the window that currently has focus, use QGuiApplication::focusWindow().
1329
1330	\sa requestActivate()
1331	*/
1332	bool QWindow::isActive() const
1333	{
1334	Q_D(const QWindow);
1335	if (!d->platformWindow)
1336	return false;
1337
1338	QWindow *focus = QGuiApplication::focusWindow();
1339
1340	// Means the whole application lost the focus
1341	if (!focus)
1342	return false;
1343
1344	if (focus == this)
1345	return true;
1346
1347	if (QWindow *p = parent(mode: IncludeTransients))
1348	return p->isActive();
1349	else
1350	return isAncestorOf(child: focus);
1351	}
1352
1353	/*!
1354	\property QWindow::contentOrientation
1355	\brief the orientation of the window's contents
1356
1357	This is a hint to the window manager in case it needs to display
1358	additional content like popups, dialogs, status bars, or similar
1359	in relation to the window.
1360
1361	The recommended orientation is QScreen::orientation() but
1362	an application doesn't have to support all possible orientations,
1363	and thus can opt to ignore the current screen orientation.
1364
1365	The difference between the window and the content orientation
1366	determines how much to rotate the content by. QScreen::angleBetween(),
1367	QScreen::transformBetween(), and QScreen::mapBetween() can be used
1368	to compute the necessary transform.
1369
1370	The default value is Qt::PrimaryOrientation
1371	*/
1372	void QWindow::reportContentOrientationChange(Qt::ScreenOrientation orientation)
1373	{
1374	Q_D(QWindow);
1375	if (d->contentOrientation == orientation)
1376	return;
1377	if (d->platformWindow)
1378	d->platformWindow->handleContentOrientationChange(orientation);
1379	d->contentOrientation = orientation;
1380	emit contentOrientationChanged(orientation);
1381	}
1382
1383	Qt::ScreenOrientation QWindow::contentOrientation() const
1384	{
1385	Q_D(const QWindow);
1386	return d->contentOrientation;
1387	}
1388
1389	/*!
1390	Returns the ratio between physical pixels and device-independent pixels
1391	for the window. This value is dependent on the screen the window is on,
1392	and may change when the window is moved.
1393
1394	Common values are 1.0 on normal displays and 2.0 on Apple "retina" displays.
1395
1396	\note For windows not backed by a platform window, meaning that create() was not
1397	called, the function will fall back to the associated QScreen's device pixel ratio.
1398
1399	\sa QScreen::devicePixelRatio()
1400	*/
1401	qreal QWindow::devicePixelRatio() const
1402	{
1403	Q_D(const QWindow);
1404	return d->devicePixelRatio;
1405	}
1406
1407	/*
1408	Updates the cached devicePixelRatio value by polling for a new value.
1409	Sends QEvent::DevicePixelRatioChange to the window if the DPR has changed.
1410	Returns true if the DPR was changed.
1411	*/
1412	bool QWindowPrivate::updateDevicePixelRatio()
1413	{
1414	Q_Q(QWindow);
1415
1416	const qreal newDevicePixelRatio = [this, q]{
1417	if (platformWindow)
1418	return platformWindow->devicePixelRatio() * QHighDpiScaling::factor(context: q);
1419
1420	// If there is no platform window use the associated screen's devicePixelRatio,
1421	// which typically is the primary screen and will be correct for single-display
1422	// systems (a very common case).
1423	if (auto *screen = q->screen())
1424	return screen->devicePixelRatio();
1425
1426	// In some cases we are running without any QScreens, so fall back to QGuiApp
1427	return qGuiApp->devicePixelRatio();
1428	}();
1429
1430	if (newDevicePixelRatio == devicePixelRatio)
1431	return false;
1432
1433	devicePixelRatio = newDevicePixelRatio;
1434	QEvent dprChangeEvent(QEvent::DevicePixelRatioChange);
1435	QGuiApplication::sendEvent(receiver: q, event: &dprChangeEvent);
1436	return true;
1437	}
1438
1439	Qt::WindowState QWindowPrivate::effectiveState(Qt::WindowStates state)
1440	{
1441	if (state & Qt::WindowMinimized)
1442	return Qt::WindowMinimized;
1443	else if (state & Qt::WindowFullScreen)
1444	return Qt::WindowFullScreen;
1445	else if (state & Qt::WindowMaximized)
1446	return Qt::WindowMaximized;
1447	return Qt::WindowNoState;
1448	}
1449
1450	/*!
1451	\brief set the screen-occupation state of the window
1452
1453	The window \a state represents whether the window appears in the
1454	windowing system as maximized, minimized, fullscreen, or normal.
1455
1456	The enum value Qt::WindowActive is not an accepted parameter.
1457
1458	\sa showNormal(), showFullScreen(), showMinimized(), showMaximized(), setWindowStates()
1459	*/
1460	void QWindow::setWindowState(Qt::WindowState state)
1461	{
1462	setWindowStates(state);
1463	}
1464
1465	/*!
1466	\brief set the screen-occupation state of the window
1467	\since 5.10
1468
1469	The window \a state represents whether the window appears in the
1470	windowing system as maximized, minimized and/or fullscreen.
1471
1472	The window can be in a combination of several states. For example, if
1473	the window is both minimized and maximized, the window will appear
1474	minimized, but clicking on the task bar entry will restore it to the
1475	maximized state.
1476
1477	The enum value Qt::WindowActive should not be set.
1478
1479	\sa showNormal(), showFullScreen(), showMinimized(), showMaximized()
1480	*/
1481	void QWindow::setWindowStates(Qt::WindowStates state)
1482	{
1483	Q_D(QWindow);
1484	if (state & Qt::WindowActive) {
1485	qWarning(msg: "QWindow::setWindowStates does not accept Qt::WindowActive");
1486	state &= ~Qt::WindowActive;
1487	}
1488
1489	if (d->platformWindow)
1490	d->platformWindow->setWindowState(state);
1491
1492	auto originalEffectiveState = QWindowPrivate::effectiveState(state: d->windowState);
1493	d->windowState = state;
1494	auto newEffectiveState = QWindowPrivate::effectiveState(state: d->windowState);
1495	if (newEffectiveState != originalEffectiveState)
1496	emit windowStateChanged(windowState: newEffectiveState);
1497
1498	d->updateVisibility();
1499	}
1500
1501	/*!
1502	\brief the screen-occupation state of the window
1503
1504	\sa setWindowState(), windowStates()
1505	*/
1506	Qt::WindowState QWindow::windowState() const
1507	{
1508	Q_D(const QWindow);
1509	return QWindowPrivate::effectiveState(state: d->windowState);
1510	}
1511
1512	/*!
1513	\brief the screen-occupation state of the window
1514	\since 5.10
1515
1516	The window can be in a combination of several states. For example, if
1517	the window is both minimized and maximized, the window will appear
1518	minimized, but clicking on the task bar entry will restore it to
1519	the maximized state.
1520
1521	\sa setWindowStates()
1522	*/
1523	Qt::WindowStates QWindow::windowStates() const
1524	{
1525	Q_D(const QWindow);
1526	return d->windowState;
1527	}
1528
1529	/*!
1530	\fn QWindow::windowStateChanged(Qt::WindowState windowState)
1531
1532	This signal is emitted when the \a windowState changes, either
1533	by being set explicitly with setWindowStates(), or automatically when
1534	the user clicks one of the titlebar buttons or by other means.
1535	*/
1536
1537	/*!
1538	\property QWindow::transientParent
1539	\brief the window for which this window is a transient pop-up
1540	\since 5.13
1541
1542	This is a hint to the window manager that this window is a dialog or pop-up
1543	on behalf of the transient parent.
1544
1545	In order to cause the window to be centered above its transient \a parent by
1546	default, depending on the window manager, it may also be necessary to call
1547	setFlags() with a suitable \l Qt::WindowType (such as \c Qt::Dialog).
1548
1549	\sa parent()
1550	*/
1551	void QWindow::setTransientParent(QWindow *parent)
1552	{
1553	Q_D(QWindow);
1554	if (parent && !parent->isTopLevel()) {
1555	qWarning() << parent << "must be a top level window.";
1556	return;
1557	}
1558	if (parent == this) {
1559	qWarning() << "transient parent" << parent << "cannot be same as window";
1560	return;
1561	}
1562
1563	d->transientParent = parent;
1564
1565	QGuiApplicationPrivate::updateBlockedStatus(window: this);
1566	emit transientParentChanged(transientParent: parent);
1567	}
1568
1569	QWindow *QWindow::transientParent() const
1570	{
1571	Q_D(const QWindow);
1572	return d->transientParent.data();
1573	}
1574
1575	/*
1576	The setter for the QWindow::transientParent property.
1577	The only reason this exists is to set the transientParentPropertySet flag
1578	so that Qt Quick knows whether it was set programmatically (because of
1579	Window declaration context) or because the user set the property.
1580	*/
1581	void QWindowPrivate::setTransientParent(QWindow *parent)
1582	{
1583	Q_Q(QWindow);
1584	q->setTransientParent(parent);
1585	transientParentPropertySet = true;
1586	}
1587
1588	/*!
1589	\enum QWindow::AncestorMode
1590
1591	This enum is used to control whether or not transient parents
1592	should be considered ancestors.
1593
1594	\value ExcludeTransients Transient parents are not considered ancestors.
1595	\value IncludeTransients Transient parents are considered ancestors.
1596	*/
1597
1598	/*!
1599	Returns \c true if the window is an ancestor of the given \a child. If \a mode
1600	is IncludeTransients, then transient parents are also considered ancestors.
1601	*/
1602	bool QWindow::isAncestorOf(const QWindow *child, AncestorMode mode) const
1603	{
1604	if (child->parent() == this || (mode == IncludeTransients && child->transientParent() == this))
1605	return true;
1606
1607	if (QWindow *parent = child->parent(mode)) {
1608	if (isAncestorOf(child: parent, mode))
1609	return true;
1610	} else if (handle() && child->handle()) {
1611	if (handle()->isAncestorOf(child: child->handle()))
1612	return true;
1613	}
1614
1615	return false;
1616	}
1617
1618	/*!
1619	Returns the minimum size of the window.
1620
1621	\sa setMinimumSize()
1622	*/
1623	QSize QWindow::minimumSize() const
1624	{
1625	Q_D(const QWindow);
1626	return d->minimumSize;
1627	}
1628
1629	/*!
1630	Returns the maximum size of the window.
1631
1632	\sa setMaximumSize()
1633	*/
1634	QSize QWindow::maximumSize() const
1635	{
1636	Q_D(const QWindow);
1637	return d->maximumSize;
1638	}
1639
1640	/*!
1641	Returns the base size of the window.
1642
1643	\sa setBaseSize()
1644	*/
1645	QSize QWindow::baseSize() const
1646	{
1647	Q_D(const QWindow);
1648	return d->baseSize;
1649	}
1650
1651	/*!
1652	Returns the size increment of the window.
1653
1654	\sa setSizeIncrement()
1655	*/
1656	QSize QWindow::sizeIncrement() const
1657	{
1658	Q_D(const QWindow);
1659	return d->sizeIncrement;
1660	}
1661
1662	/*!
1663	Sets the minimum size of the window.
1664
1665	This is a hint to the window manager to prevent resizing below the specified \a size.
1666
1667	\sa setMaximumSize(), minimumSize()
1668	*/
1669	void QWindow::setMinimumSize(const QSize &size)
1670	{
1671	Q_D(QWindow);
1672	d->setMinOrMaxSize(
1673	oldSizeMember: &d->minimumSize, size, funcWidthChanged: [this, d]() { emit minimumWidthChanged(arg: d->minimumSize.width()); },
1674	funcHeightChanged: [this, d]() { emit minimumHeightChanged(arg: d->minimumSize.height()); });
1675	}
1676
1677	/*!
1678	\property QWindow::x
1679	\brief the x position of the window's geometry
1680	*/
1681	void QWindow::setX(int arg)
1682	{
1683	Q_D(QWindow);
1684	if (x() != arg)
1685	setGeometry(QRect(arg, y(), width(), height()));
1686	else
1687	d->positionAutomatic = false;
1688	}
1689
1690	/*!
1691	\property QWindow::y
1692	\brief the y position of the window's geometry
1693	*/
1694	void QWindow::setY(int arg)
1695	{
1696	Q_D(QWindow);
1697	if (y() != arg)
1698	setGeometry(QRect(x(), arg, width(), height()));
1699	else
1700	d->positionAutomatic = false;
1701	}
1702
1703	/*!
1704	\property QWindow::width
1705	\brief the width of the window's geometry
1706	*/
1707	void QWindow::setWidth(int w)
1708	{
1709	resize(w, h: height());
1710	}
1711
1712	/*!
1713	\property QWindow::height
1714	\brief the height of the window's geometry
1715	*/
1716	void QWindow::setHeight(int h)
1717	{
1718	resize(w: width(), h);
1719	}
1720
1721	/*!
1722	\property QWindow::minimumWidth
1723	\brief the minimum width of the window's geometry
1724	*/
1725	void QWindow::setMinimumWidth(int w)
1726	{
1727	setMinimumSize(QSize(w, minimumHeight()));
1728	}
1729
1730	/*!
1731	\property QWindow::minimumHeight
1732	\brief the minimum height of the window's geometry
1733	*/
1734	void QWindow::setMinimumHeight(int h)
1735	{
1736	setMinimumSize(QSize(minimumWidth(), h));
1737	}
1738
1739	/*!
1740	Sets the maximum size of the window.
1741
1742	This is a hint to the window manager to prevent resizing above the specified \a size.
1743
1744	\sa setMinimumSize(), maximumSize()
1745	*/
1746	void QWindow::setMaximumSize(const QSize &size)
1747	{
1748	Q_D(QWindow);
1749	d->setMinOrMaxSize(
1750	oldSizeMember: &d->maximumSize, size, funcWidthChanged: [this, d]() { emit maximumWidthChanged(arg: d->maximumSize.width()); },
1751	funcHeightChanged: [this, d]() { emit maximumHeightChanged(arg: d->maximumSize.height()); });
1752	}
1753
1754	/*!
1755	\property QWindow::maximumWidth
1756	\brief the maximum width of the window's geometry
1757	*/
1758	void QWindow::setMaximumWidth(int w)
1759	{
1760	setMaximumSize(QSize(w, maximumHeight()));
1761	}
1762
1763	/*!
1764	\property QWindow::maximumHeight
1765	\brief the maximum height of the window's geometry
1766	*/
1767	void QWindow::setMaximumHeight(int h)
1768	{
1769	setMaximumSize(QSize(maximumWidth(), h));
1770	}
1771
1772	/*!
1773	Sets the base \a size of the window.
1774
1775	The base size is used to calculate a proper window size if the
1776	window defines sizeIncrement().
1777
1778	\sa setMinimumSize(), setMaximumSize(), setSizeIncrement(), baseSize()
1779	*/
1780	void QWindow::setBaseSize(const QSize &size)
1781	{
1782	Q_D(QWindow);
1783	if (d->baseSize == size)
1784	return;
1785	d->baseSize = size;
1786	if (d->platformWindow && isTopLevel())
1787	d->platformWindow->propagateSizeHints();
1788	}
1789
1790	/*!
1791	Sets the size increment (\a size) of the window.
1792
1793	When the user resizes the window, the size will move in steps of
1794	sizeIncrement().width() pixels horizontally and
1795	sizeIncrement().height() pixels vertically, with baseSize() as the
1796	basis.
1797
1798	By default, this property contains a size with zero width and height.
1799
1800	The windowing system might not support size increments.
1801
1802	\sa setBaseSize(), setMinimumSize(), setMaximumSize()
1803	*/
1804	void QWindow::setSizeIncrement(const QSize &size)
1805	{
1806	Q_D(QWindow);
1807	if (d->sizeIncrement == size)
1808	return;
1809	d->sizeIncrement = size;
1810	if (d->platformWindow && isTopLevel())
1811	d->platformWindow->propagateSizeHints();
1812	}
1813
1814	/*!
1815	Sets the geometry of the window, excluding its window frame, to a
1816	rectangle constructed from \a posx, \a posy, \a w and \a h.
1817
1818	The geometry is in relation to the virtualGeometry() of its screen.
1819
1820	\sa geometry()
1821	*/
1822	void QWindow::setGeometry(int posx, int posy, int w, int h)
1823	{
1824	setGeometry(QRect(posx, posy, w, h));
1825	}
1826
1827	/*!
1828	\brief Sets the geometry of the window, excluding its window frame, to \a rect.
1829
1830	The geometry is in relation to the virtualGeometry() of its screen.
1831
1832	\sa geometry()
1833	*/
1834	void QWindow::setGeometry(const QRect &rect)
1835	{
1836	Q_D(QWindow);
1837	d->positionAutomatic = false;
1838	const QRect oldRect = geometry();
1839	if (rect == oldRect)
1840	return;
1841
1842	d->positionPolicy = QWindowPrivate::WindowFrameExclusive;
1843	if (d->platformWindow) {
1844	QScreen *newScreen = d->screenForGeometry(rect);
1845	if (newScreen && isTopLevel())
1846	d->setTopLevelScreen(newScreen, recreate: true);
1847	d->platformWindow->setGeometry(QHighDpi::toNativeWindowGeometry(value: rect, context: this));
1848	} else {
1849	d->geometry = rect;
1850
1851	if (rect.x() != oldRect.x())
1852	emit xChanged(arg: rect.x());
1853	if (rect.y() != oldRect.y())
1854	emit yChanged(arg: rect.y());
1855	if (rect.width() != oldRect.width())
1856	emit widthChanged(arg: rect.width());
1857	if (rect.height() != oldRect.height())
1858	emit heightChanged(arg: rect.height());
1859	}
1860	}
1861
1862	/*
1863	This is equivalent to QPlatformWindow::screenForGeometry, but in platform
1864	independent coordinates. The duplication is unfortunate, but there is a
1865	chicken and egg problem here: we cannot convert to native coordinates
1866	before we know which screen we are on.
1867	*/
1868	QScreen *QWindowPrivate::screenForGeometry(const QRect &newGeometry) const
1869	{
1870	Q_Q(const QWindow);
1871	QScreen *currentScreen = q->screen();
1872	QScreen *fallback = currentScreen;
1873	QPoint center = newGeometry.center();
1874	if (!q->parent() && currentScreen && !currentScreen->geometry().contains(p: center)) {
1875	const auto screens = currentScreen->virtualSiblings();
1876	for (QScreen* screen : screens) {
1877	if (screen->geometry().contains(p: center))
1878	return screen;
1879	if (screen->geometry().intersects(r: newGeometry))
1880	fallback = screen;
1881	}
1882	}
1883	return fallback;
1884	}
1885
1886
1887	/*!
1888	Returns the geometry of the window, excluding its window frame.
1889
1890	The geometry is in relation to the virtualGeometry() of its screen.
1891
1892	\sa frameMargins(), frameGeometry()
1893	*/
1894	QRect QWindow::geometry() const
1895	{
1896	Q_D(const QWindow);
1897	if (d->platformWindow) {
1898	const auto nativeGeometry = d->platformWindow->geometry();
1899	return QHighDpi::fromNativeWindowGeometry(value: nativeGeometry, context: this);
1900	}
1901	return d->geometry;
1902	}
1903
1904	/*!
1905	Returns the window frame margins surrounding the window.
1906
1907	\sa geometry(), frameGeometry()
1908	*/
1909	QMargins QWindow::frameMargins() const
1910	{
1911	Q_D(const QWindow);
1912	if (d->platformWindow)
1913	return QHighDpi::fromNativePixels(value: d->platformWindow->frameMargins(), context: this);
1914	return QMargins();
1915	}
1916
1917	/*!
1918	Returns the geometry of the window, including its window frame.
1919
1920	The geometry is in relation to the virtualGeometry() of its screen.
1921
1922	\sa geometry(), frameMargins()
1923	*/
1924	QRect QWindow::frameGeometry() const
1925	{
1926	Q_D(const QWindow);
1927	if (d->platformWindow) {
1928	QMargins m = frameMargins();
1929	return QHighDpi::fromNativeWindowGeometry(value: d->platformWindow->geometry(), context: this).adjusted(xp1: -m.left(), yp1: -m.top(), xp2: m.right(), yp2: m.bottom());
1930	}
1931	return d->geometry;
1932	}
1933
1934	/*!
1935	Returns the top left position of the window, including its window frame.
1936
1937	This returns the same value as frameGeometry().topLeft().
1938
1939	\sa geometry(), frameGeometry()
1940	*/
1941	QPoint QWindow::framePosition() const
1942	{
1943	Q_D(const QWindow);
1944	if (d->platformWindow) {
1945	QMargins margins = frameMargins();
1946	return QHighDpi::fromNativeWindowGeometry(value: d->platformWindow->geometry().topLeft(), context: this) - QPoint(margins.left(), margins.top());
1947	}
1948	return d->geometry.topLeft();
1949	}
1950
1951	/*!
1952	Sets the upper left position of the window (\a point) including its window frame.
1953
1954	The position is in relation to the virtualGeometry() of its screen.
1955
1956	\sa setGeometry(), frameGeometry()
1957	*/
1958	void QWindow::setFramePosition(const QPoint &point)
1959	{
1960	Q_D(QWindow);
1961	d->positionPolicy = QWindowPrivate::WindowFrameInclusive;
1962	d->positionAutomatic = false;
1963	if (d->platformWindow) {
1964	d->platformWindow->setGeometry(QHighDpi::toNativeWindowGeometry(value: QRect(point, size()), context: this));
1965	} else {
1966	d->geometry.moveTopLeft(p: point);
1967	}
1968	}
1969
1970	/*!
1971	\brief set the position of the window on the desktop to \a pt
1972
1973	The position is in relation to the virtualGeometry() of its screen.
1974
1975	For interactively moving windows, see startSystemMove(). For interactively
1976	resizing windows, see startSystemResize().
1977
1978	\note Not all windowing systems support setting or querying top level window positions.
1979	On such a system, programmatically moving windows may not have any effect, and artificial
1980	values may be returned for the current positions, such as \c QPoint(0, 0).
1981
1982	\sa position(), startSystemMove()
1983	*/
1984	void QWindow::setPosition(const QPoint &pt)
1985	{
1986	setGeometry(QRect(pt, size()));
1987	}
1988
1989	/*!
1990	\brief set the position of the window on the desktop to \a posx, \a posy
1991
1992	The position is in relation to the virtualGeometry() of its screen.
1993
1994	\sa position()
1995	*/
1996	void QWindow::setPosition(int posx, int posy)
1997	{
1998	setPosition(QPoint(posx, posy));
1999	}
2000
2001	/*!
2002	\fn QPoint QWindow::position() const
2003	\brief Returns the position of the window on the desktop excluding any window frame
2004
2005	\note Not all windowing systems support setting or querying top level window positions.
2006	On such a system, programmatically moving windows may not have any effect, and artificial
2007	values may be returned for the current positions, such as \c QPoint(0, 0).
2008
2009	\sa setPosition()
2010	*/
2011
2012	/*!
2013	\fn QSize QWindow::size() const
2014	\brief Returns the size of the window excluding any window frame
2015
2016	\sa resize()
2017	*/
2018
2019	/*!
2020	set the size of the window, excluding any window frame, to a QSize
2021	constructed from width \a w and height \a h
2022
2023	For interactively resizing windows, see startSystemResize().
2024
2025	\sa size(), geometry()
2026	*/
2027	void QWindow::resize(int w, int h)
2028	{
2029	resize(newSize: QSize(w, h));
2030	}
2031
2032	/*!
2033	\brief set the size of the window, excluding any window frame, to \a newSize
2034
2035	\sa size(), geometry()
2036	*/
2037	void QWindow::resize(const QSize &newSize)
2038	{
2039	Q_D(QWindow);
2040
2041	const QSize oldSize = size();
2042	if (newSize == oldSize)
2043	return;
2044
2045	d->positionPolicy = QWindowPrivate::WindowFrameExclusive;
2046	if (d->platformWindow) {
2047	d->platformWindow->setGeometry(
2048	QHighDpi::toNativeWindowGeometry(value: QRect(position(), newSize), context: this));
2049	} else {
2050	d->geometry.setSize(newSize);
2051	if (newSize.width() != oldSize.width())
2052	emit widthChanged(arg: newSize.width());
2053	if (newSize.height() != oldSize.height())
2054	emit heightChanged(arg: newSize.height());
2055	}
2056	}
2057
2058	/*!
2059	Releases the native platform resources associated with this window.
2060
2061	\sa create()
2062	*/
2063	void QWindow::destroy()
2064	{
2065	Q_D(QWindow);
2066	if (!d->platformWindow)
2067	return;
2068
2069	if (d->platformWindow->isForeignWindow())
2070	return;
2071
2072	d->destroy();
2073	}
2074
2075	void QWindowPrivate::destroy()
2076	{
2077	if (!platformWindow)
2078	return;
2079
2080	Q_Q(QWindow);
2081	QObjectList childrenWindows = q->children();
2082	for (int i = 0; i < childrenWindows.size(); i++) {
2083	QObject *object = childrenWindows.at(i);
2084	if (object->isWindowType()) {
2085	QWindow *w = static_cast<QWindow*>(object);
2086	qt_window_private(window: w)->destroy();
2087	}
2088	}
2089
2090	bool wasVisible = q->isVisible();
2091	visibilityOnDestroy = wasVisible && platformWindow;
2092
2093	q->setVisible(false);
2094
2095	// Let subclasses act, typically by doing graphics resource cleaup, when
2096	// the window, to which graphics resource may be tied, is going away.
2097	//
2098	// NB! This is dysfunctional when destroy() is invoked from the dtor since
2099	// a reimplemented event() will not get called in the subclasses at that
2100	// stage. However, the typical QWindow cleanup involves either close() or
2101	// going through QWindowContainer, both of which will do an explicit, early
2102	// destroy(), which is good here.
2103
2104	QPlatformSurfaceEvent e(QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed);
2105	QGuiApplication::sendEvent(receiver: q, event: &e);
2106
2107	// Unset platformWindow before deleting, so that the destructor of the
2108	// platform window does not recurse back into the platform window via
2109	// this window during destruction (e.g. as a result of platform events).
2110	delete std::exchange(obj&: platformWindow, new_val: nullptr);
2111
2112	if (QGuiApplicationPrivate::focus_window == q)
2113	QGuiApplicationPrivate::focus_window = q->parent();
2114	if (QGuiApplicationPrivate::currentMouseWindow == q)
2115	QGuiApplicationPrivate::currentMouseWindow = q->parent();
2116	if (QGuiApplicationPrivate::currentMousePressWindow == q)
2117	QGuiApplicationPrivate::currentMousePressWindow = q->parent();
2118
2119	for (int i = 0; i < QGuiApplicationPrivate::tabletDevicePoints.size(); ++i)
2120	if (QGuiApplicationPrivate::tabletDevicePoints.at(i).target == q)
2121	QGuiApplicationPrivate::tabletDevicePoints[i].target = q->parent();
2122
2123	resizeEventPending = true;
2124	receivedExpose = false;
2125	exposed = false;
2126
2127	// Position set via setFramePosition will have propagated back to
2128	// our geometry member as client geometry, so when creating the
2129	// window again we need to ensure the policy matches that.
2130	positionPolicy = QWindowPrivate::WindowFrameExclusive;
2131	}
2132
2133	/*!
2134	Returns the platform window corresponding to the window.
2135
2136	\internal
2137	*/
2138	QPlatformWindow *QWindow::handle() const
2139	{
2140	Q_D(const QWindow);
2141	return d->platformWindow;
2142	}
2143
2144	/*!
2145	Returns the platform surface corresponding to the window.
2146
2147	\internal
2148	*/
2149	QPlatformSurface *QWindow::surfaceHandle() const
2150	{
2151	Q_D(const QWindow);
2152	return d->platformWindow;
2153	}
2154
2155	/*!
2156	Sets whether keyboard grab should be enabled or not (\a grab).
2157
2158	If the return value is true, the window receives all key events until
2159	setKeyboardGrabEnabled(false) is called; other windows get no key events at
2160	all. Mouse events are not affected. Use setMouseGrabEnabled() if you want
2161	to grab that.
2162
2163	\sa setMouseGrabEnabled()
2164	*/
2165	bool QWindow::setKeyboardGrabEnabled(bool grab)
2166	{
2167	Q_D(QWindow);
2168	if (d->platformWindow)
2169	return d->platformWindow->setKeyboardGrabEnabled(grab);
2170	return false;
2171	}
2172
2173	/*!
2174	Sets whether mouse grab should be enabled or not (\a grab).
2175
2176	If the return value is true, the window receives all mouse events until setMouseGrabEnabled(false) is
2177	called; other windows get no mouse events at all. Keyboard events are not affected.
2178	Use setKeyboardGrabEnabled() if you want to grab that.
2179
2180	\sa setKeyboardGrabEnabled()
2181	*/
2182	bool QWindow::setMouseGrabEnabled(bool grab)
2183	{
2184	Q_D(QWindow);
2185	if (d->platformWindow)
2186	return d->platformWindow->setMouseGrabEnabled(grab);
2187	return false;
2188	}
2189
2190	/*!
2191	Returns the screen on which the window is shown, or null if there is none.
2192
2193	For child windows, this returns the screen of the corresponding top level window.
2194
2195	\sa setScreen(), QScreen::virtualSiblings()
2196	*/
2197	QScreen *QWindow::screen() const
2198	{
2199	Q_D(const QWindow);
2200	return d->parentWindow ? d->parentWindow->screen() : d->topLevelScreen.data();
2201	}
2202
2203	/*!
2204	Sets the screen on which the window should be shown.
2205
2206	If the window has been created, it will be recreated on the \a newScreen.
2207
2208	\note If the screen is part of a virtual desktop of multiple screens,
2209	the window will not move automatically to \a newScreen. To place the
2210	window relative to the screen, use the screen's topLeft() position.
2211
2212	This function only works for top level windows.
2213
2214	\sa screen(), QScreen::virtualSiblings()
2215	*/
2216	void QWindow::setScreen(QScreen *newScreen)
2217	{
2218	Q_D(QWindow);
2219	if (!newScreen)
2220	newScreen = QGuiApplication::primaryScreen();
2221	d->setTopLevelScreen(newScreen, recreate: newScreen != nullptr);
2222	}
2223
2224	/*!
2225	\fn QWindow::screenChanged(QScreen *screen)
2226
2227	This signal is emitted when a window's \a screen changes, either
2228	by being set explicitly with setScreen(), or automatically when
2229	the window's screen is removed.
2230	*/
2231
2232	/*!
2233	Returns the accessibility interface for the object that the window represents
2234	\internal
2235	\sa QAccessible
2236	*/
2237	QAccessibleInterface *QWindow::accessibleRoot() const
2238	{
2239	return nullptr;
2240	}
2241
2242	/*!
2243	\fn QWindow::focusObjectChanged(QObject *object)
2244
2245	This signal is emitted when the final receiver of events tied to focus
2246	is changed to \a object.
2247
2248	\sa focusObject()
2249	*/
2250
2251	/*!
2252	Returns the QObject that will be the final receiver of events tied focus, such
2253	as key events.
2254	*/
2255	QObject *QWindow::focusObject() const
2256	{
2257	return const_cast<QWindow *>(this);
2258	}
2259
2260	/*!
2261	Shows the window.
2262
2263	For child windows, this is equivalent to calling showNormal().
2264	Otherwise, it is equivalent to calling showFullScreen(), showMaximized(), or showNormal(),
2265	depending on the platform's default behavior for the window type and flags.
2266
2267	\sa showFullScreen(), showMaximized(), showNormal(), hide(), QStyleHints::showIsFullScreen(), flags()
2268	*/
2269	void QWindow::show()
2270	{
2271	if (parent()) {
2272	showNormal();
2273	} else {
2274	const auto *platformIntegration = QGuiApplicationPrivate::platformIntegration();
2275	Qt::WindowState defaultState = platformIntegration->defaultWindowState(d_func()->windowFlags);
2276	if (defaultState == Qt::WindowFullScreen)
2277	showFullScreen();
2278	else if (defaultState == Qt::WindowMaximized)
2279	showMaximized();
2280	else
2281	showNormal();
2282	}
2283	}
2284
2285	/*!
2286	Hides the window.
2287
2288	Equivalent to calling setVisible(false).
2289
2290	\sa show(), setVisible()
2291	*/
2292	void QWindow::hide()
2293	{
2294	setVisible(false);
2295	}
2296
2297	/*!
2298	Shows the window as minimized.
2299
2300	Equivalent to calling setWindowStates(Qt::WindowMinimized) and then
2301	setVisible(true).
2302
2303	\sa setWindowStates(), setVisible()
2304	*/
2305	void QWindow::showMinimized()
2306	{
2307	setWindowStates(Qt::WindowMinimized);
2308	setVisible(true);
2309	}
2310
2311	/*!
2312	Shows the window as maximized.
2313
2314	Equivalent to calling setWindowStates(Qt::WindowMaximized) and then
2315	setVisible(true).
2316
2317	\sa setWindowStates(), setVisible()
2318	*/
2319	void QWindow::showMaximized()
2320	{
2321	setWindowStates(Qt::WindowMaximized);
2322	setVisible(true);
2323	}
2324
2325	/*!
2326	Shows the window as fullscreen.
2327
2328	Equivalent to calling setWindowStates(Qt::WindowFullScreen) and then
2329	setVisible(true).
2330
2331	See the \l{QWidget::showFullScreen()} documentation for platform-specific
2332	considerations and limitations.
2333
2334	\sa setWindowStates(), setVisible()
2335	*/
2336	void QWindow::showFullScreen()
2337	{
2338	setWindowStates(Qt::WindowFullScreen);
2339	setVisible(true);
2340	#if !defined Q_OS_QNX // On QNX this window will be activated anyway from libscreen
2341	// activating it here before libscreen activates it causes problems
2342	requestActivate();
2343	#endif
2344	}
2345
2346	/*!
2347	Shows the window as normal, i.e. neither maximized, minimized, nor fullscreen.
2348
2349	Equivalent to calling setWindowStates(Qt::WindowNoState) and then
2350	setVisible(true).
2351
2352	\sa setWindowStates(), setVisible()
2353	*/
2354	void QWindow::showNormal()
2355	{
2356	setWindowStates(Qt::WindowNoState);
2357	setVisible(true);
2358	}
2359
2360	/*!
2361	Close the window.
2362
2363	This closes the window, effectively calling destroy(), and potentially
2364	quitting the application. Returns \c true on success, false if it has a parent
2365	window (in which case the top level window should be closed instead).
2366
2367	\sa destroy(), QGuiApplication::quitOnLastWindowClosed(), closeEvent()
2368	*/
2369	bool QWindow::close()
2370	{
2371	Q_D(QWindow);
2372	if (d->inClose)
2373	return true;
2374
2375	// Do not close non top level windows
2376	if (!isTopLevel())
2377	return false;
2378
2379	if (!d->platformWindow) {
2380	// dock widgets can transition back and forth to being popups;
2381	// avoid getting stuck
2382	if (QGuiApplicationPrivate::activePopupWindow() == this)
2383	QGuiApplicationPrivate::closePopup(popup: this);
2384	return true;
2385	}
2386
2387	// The window might be deleted during close,
2388	// as a result of delivering the close event.
2389	QPointer guard(this);
2390	d->inClose = true;
2391	bool success = d->platformWindow->close();
2392	if (guard)
2393	d->inClose = false;
2394
2395	return success;
2396	}
2397
2398	bool QWindowPrivate::participatesInLastWindowClosed() const
2399	{
2400	Q_Q(const QWindow);
2401
2402	if (!q->isTopLevel())
2403	return false;
2404
2405	// Tool-tip widgets do not normally have Qt::WA_QuitOnClose,
2406	// but since we do not have a similar flag for non-widget
2407	// windows we need an explicit exclusion here as well.
2408	if (q->type() == Qt::ToolTip)
2409	return false;
2410
2411	// A window with a transient parent is not a primary window,
2412	// it's a secondary window.
2413	if (q->transientParent())
2414	return false;
2415
2416	return true;
2417	}
2418
2419	bool QWindowPrivate::treatAsVisible() const
2420	{
2421	Q_Q(const QWindow);
2422	return q->isVisible();
2423	}
2424
2425	/*! \internal
2426	Returns the popup window that has consumed \a event, if any.
2427	\a activePopupOnPress is the window that we have observed previously handling the press.
2428	*/
2429	const QWindow *QWindowPrivate::forwardToPopup(QEvent *event, const QWindow */*activePopupOnPress*/)
2430	{
2431	Q_Q(const QWindow);
2432	qCDebug(lcPopup) << "checking for popup alternative to" << q << "for" << event
2433	<< "active popup?" << QGuiApplicationPrivate::activePopupWindow();
2434	QWindow *ret = nullptr;
2435	if (QWindow *popupWindow = QGuiApplicationPrivate::activePopupWindow()) {
2436	if (q == popupWindow)
2437	return nullptr; // avoid infinite recursion: we're already handling it
2438	if (event->isPointerEvent()) {
2439	// detach eventPoints before modifying them
2440	QScopedPointer<QPointerEvent> pointerEvent(static_cast<QPointerEvent *>(event)->clone());
2441	for (int i = 0; i < pointerEvent->pointCount(); ++i) {
2442	QEventPoint &eventPoint = pointerEvent->point(i);
2443	const QPoint globalPos = eventPoint.globalPosition().toPoint();
2444	const QPointF mapped = popupWindow->mapFromGlobal(pos: globalPos);
2445	QMutableEventPoint::setPosition(p&: eventPoint, arg: mapped);
2446	QMutableEventPoint::setScenePosition(p&: eventPoint, arg: mapped);
2447	}
2448
2449	/* Popups are expected to be able to directly handle the
2450	drag-release sequence after pressing to open, as well as
2451	any other mouse events that occur within the popup's bounds. */
2452	if (QCoreApplication::sendSpontaneousEvent(receiver: popupWindow, event: pointerEvent.get())) {
2453	event->setAccepted(pointerEvent->isAccepted());
2454	if (pointerEvent->isAccepted())
2455	ret = popupWindow;
2456	}
2457	qCDebug(lcPopup) << q << "forwarded" << event->type() << "to popup" << popupWindow
2458	<< "handled?" << (ret != nullptr)
2459	<< "accepted?" << event->isAccepted();
2460	return ret;
2461	} else if (event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease) {
2462	if (QCoreApplication::sendSpontaneousEvent(receiver: popupWindow, event))
2463	ret = popupWindow;
2464	qCDebug(lcPopup) << q << "forwarded" << event->type() << "to popup" << popupWindow
2465	<< "handled?" << (ret != nullptr)
2466	<< "accepted?" << event->isAccepted();
2467	return ret;
2468	}
2469	}
2470	return ret;
2471	}
2472
2473	/*!
2474	The expose event (\a ev) is sent by the window system when a window moves
2475	between the un-exposed and exposed states.
2476
2477	An exposed window is potentially visible to the user. If the window is moved
2478	off screen, is made totally obscured by another window, is minimized, or
2479	similar, this function might be called and the value of isExposed() might
2480	change to false. You may use this event to limit expensive operations such
2481	as animations to only run when the window is exposed.
2482
2483	This event should not be used to paint. To handle painting implement
2484	paintEvent() instead.
2485
2486	A resize event will always be sent before the expose event the first time
2487	a window is shown.
2488
2489	\sa paintEvent(), isExposed()
2490	*/
2491	void QWindow::exposeEvent(QExposeEvent *ev)
2492	{
2493	ev->ignore();
2494	}
2495
2496	/*!
2497	The paint event (\a ev) is sent by the window system whenever an area of
2498	the window needs a repaint, for example when initially showing the window,
2499	or due to parts of the window being uncovered by moving another window.
2500
2501	The application is expected to render into the window in response to the
2502	paint event, regardless of the exposed state of the window. For example,
2503	a paint event may be sent before the window is exposed, to prepare it for
2504	showing to the user.
2505
2506	\since 6.0
2507
2508	\sa exposeEvent()
2509	*/
2510	void QWindow::paintEvent(QPaintEvent *ev)
2511	{
2512	ev->ignore();
2513	}
2514
2515	/*!
2516	Override this to handle window move events (\a ev).
2517	*/
2518	void QWindow::moveEvent(QMoveEvent *ev)
2519	{
2520	ev->ignore();
2521	}
2522
2523	/*!
2524	Override this to handle resize events (\a ev).
2525
2526	The resize event is called whenever the window is resized in the windowing system,
2527	either directly through the windowing system acknowledging a setGeometry() or resize() request,
2528	or indirectly through the user resizing the window manually.
2529	*/
2530	void QWindow::resizeEvent(QResizeEvent *ev)
2531	{
2532	ev->ignore();
2533	}
2534
2535	/*!
2536	Override this to handle show events (\a ev).
2537
2538	The function is called when the window has requested becoming visible.
2539
2540	If the window is successfully shown by the windowing system, this will
2541	be followed by a resize and an expose event.
2542	*/
2543	void QWindow::showEvent(QShowEvent *ev)
2544	{
2545	ev->ignore();
2546	}
2547
2548	/*!
2549	Override this to handle hide events (\a ev).
2550
2551	The function is called when the window has requested being hidden in the
2552	windowing system.
2553	*/
2554	void QWindow::hideEvent(QHideEvent *ev)
2555	{
2556	ev->ignore();
2557	}
2558
2559	/*!
2560	Override this to handle close events (\a ev).
2561
2562	The function is called when the window is requested to close. Call \l{QEvent::ignore()}
2563	on the event if you want to prevent the window from being closed.
2564
2565	\sa close()
2566	*/
2567	void QWindow::closeEvent(QCloseEvent *ev)
2568	{
2569	Q_UNUSED(ev);
2570	}
2571
2572	/*!
2573	Override this to handle any event (\a ev) sent to the window.
2574	Return \c true if the event was recognized and processed.
2575
2576	Remember to call the base class version if you wish for mouse events,
2577	key events, resize events, etc to be dispatched as usual.
2578	*/
2579	bool QWindow::event(QEvent *ev)
2580	{
2581	switch (ev->type()) {
2582	case QEvent::MouseMove:
2583	mouseMoveEvent(static_cast<QMouseEvent*>(ev));
2584	break;
2585
2586	case QEvent::MouseButtonPress:
2587	mousePressEvent(static_cast<QMouseEvent*>(ev));
2588	break;
2589
2590	case QEvent::MouseButtonRelease:
2591	mouseReleaseEvent(static_cast<QMouseEvent*>(ev));
2592	break;
2593
2594	case QEvent::MouseButtonDblClick:
2595	mouseDoubleClickEvent(static_cast<QMouseEvent*>(ev));
2596	break;
2597
2598	case QEvent::TouchBegin:
2599	case QEvent::TouchUpdate:
2600	case QEvent::TouchEnd:
2601	case QEvent::TouchCancel:
2602	touchEvent(static_cast<QTouchEvent *>(ev));
2603	break;
2604
2605	case QEvent::Move:
2606	moveEvent(ev: static_cast<QMoveEvent*>(ev));
2607	break;
2608
2609	case QEvent::Resize:
2610	resizeEvent(ev: static_cast<QResizeEvent*>(ev));
2611	break;
2612
2613	case QEvent::KeyPress:
2614	keyPressEvent(static_cast<QKeyEvent *>(ev));
2615	break;
2616
2617	case QEvent::KeyRelease:
2618	keyReleaseEvent(static_cast<QKeyEvent *>(ev));
2619	break;
2620
2621	case QEvent::FocusIn: {
2622	focusInEvent(static_cast<QFocusEvent *>(ev));
2623	#if QT_CONFIG(accessibility)
2624	QAccessible::State state;
2625	state.active = true;
2626	QAccessibleStateChangeEvent event(this, state);
2627	QAccessible::updateAccessibility(event: &event);
2628	#endif
2629	break; }
2630
2631	case QEvent::FocusOut: {
2632	focusOutEvent(static_cast<QFocusEvent *>(ev));
2633	#if QT_CONFIG(accessibility)
2634	QAccessible::State state;
2635	state.active = true;
2636	QAccessibleStateChangeEvent event(this, state);
2637	QAccessible::updateAccessibility(event: &event);
2638	#endif
2639	break; }
2640
2641	#if QT_CONFIG(wheelevent)
2642	case QEvent::Wheel:
2643	wheelEvent(static_cast<QWheelEvent*>(ev));
2644	break;
2645	#endif
2646
2647	case QEvent::Close: {
2648
2649	Q_D(QWindow);
2650	const bool wasVisible = d->treatAsVisible();
2651	const bool participatesInLastWindowClosed = d->participatesInLastWindowClosed();
2652
2653	// The window might be deleted in the close event handler
2654	QPointer<QWindow> deletionGuard(this);
2655	closeEvent(ev: static_cast<QCloseEvent*>(ev));
2656
2657	if (ev->isAccepted()) {
2658	if (deletionGuard)
2659	destroy();
2660	if (wasVisible && participatesInLastWindowClosed)
2661	QGuiApplicationPrivate::instance()->maybeLastWindowClosed();
2662	}
2663
2664	break;
2665	}
2666
2667	case QEvent::Expose:
2668	exposeEvent(ev: static_cast<QExposeEvent *>(ev));
2669	break;
2670
2671	case QEvent::Paint:
2672	paintEvent(ev: static_cast<QPaintEvent *>(ev));
2673	break;
2674
2675	case QEvent::Show:
2676	showEvent(ev: static_cast<QShowEvent *>(ev));
2677	break;
2678
2679	case QEvent::Hide:
2680	hideEvent(ev: static_cast<QHideEvent *>(ev));
2681	break;
2682
2683	case QEvent::ApplicationWindowIconChange:
2684	setIcon(icon());
2685	break;
2686
2687	#if QT_CONFIG(tabletevent)
2688	case QEvent::TabletPress:
2689	case QEvent::TabletMove:
2690	case QEvent::TabletRelease:
2691	tabletEvent(static_cast<QTabletEvent *>(ev));
2692	break;
2693	#endif
2694
2695	case QEvent::PlatformSurface: {
2696	if ((static_cast<QPlatformSurfaceEvent *>(ev))->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed) {
2697	#ifndef QT_NO_OPENGL
2698	QOpenGLContext *context = QOpenGLContext::currentContext();
2699	if (context && context->surface() == static_cast<QSurface *>(this))
2700	context->doneCurrent();
2701	#endif
2702	}
2703	break;
2704	}
2705
2706	default:
2707	return QObject::event(event: ev);
2708	}
2709
2710	#ifndef QT_NO_CONTEXTMENU
2711	/*
2712	QGuiApplicationPrivate::processContextMenuEvent blocks mouse-triggered
2713	context menu events that the QPA plugin might generate. In practice that
2714	never happens, as even on Windows WM_CONTEXTMENU is never generated by
2715	the OS (we never call the default window procedure that would do that in
2716	response to unhandled WM_RBUTTONUP).
2717
2718	So, we always have to syntheize QContextMenuEvent for mouse events anyway.
2719	QWidgetWindow synthesizes QContextMenuEvent similar to this code, and
2720	never calls QWindow::event, so we have to do it here as well.
2721
2722	This logic could be simplified by always synthesizing events in
2723	QGuiApplicationPrivate, or perhaps even in each QPA plugin. See QTBUG-93486.
2724	*/
2725	auto asMouseEvent = [](QEvent *ev) {
2726	const auto t = ev->type();
2727	return t == QEvent::MouseButtonPress || t == QEvent::MouseButtonRelease
2728	? static_cast<QMouseEvent *>(ev) : nullptr ;
2729	};
2730	if (QMouseEvent *me = asMouseEvent(ev);
2731	me && ev->type() == QGuiApplicationPrivate::contextMenuEventType()
2732	&& me->button() == Qt::RightButton) {
2733	QContextMenuEvent e(QContextMenuEvent::Mouse, me->position().toPoint(),
2734	me->globalPosition().toPoint(), me->modifiers());
2735	QGuiApplication::sendEvent(receiver: this, event: &e);
2736	}
2737	#endif
2738	return true;
2739	}
2740
2741	/*!
2742	Schedules a QEvent::UpdateRequest event to be delivered to this window.
2743
2744	The event is delivered in sync with the display vsync on platforms where
2745	this is possible. Otherwise, the event is delivered after a delay of at
2746	most 5 ms. If the window's associated screen reports a
2747	\l{QScreen::refreshRate()}{refresh rate} higher than 60 Hz, the interval is
2748	scaled down to a value smaller than 5. The additional time is there to give
2749	the event loop a bit of idle time to gather system events, and can be
2750	overridden using the QT_QPA_UPDATE_IDLE_TIME environment variable.
2751
2752	When driving animations, this function should be called once after drawing
2753	has completed. Calling this function multiple times will result in a single
2754	event being delivered to the window.
2755
2756	Subclasses of QWindow should reimplement event(), intercept the event and
2757	call the application's rendering code, then call the base class
2758	implementation.
2759
2760	\note The subclass' reimplementation of event() must invoke the base class
2761	implementation, unless it is absolutely sure that the event does not need to
2762	be handled by the base class. For example, the default implementation of
2763	this function relies on QEvent::Timer events. Filtering them away would
2764	therefore break the delivery of the update events.
2765
2766	\since 5.5
2767	*/
2768	void QWindow::requestUpdate()
2769	{
2770	Q_ASSERT_X(QThread::isMainThread(),
2771	"QWindow", "Updates can only be scheduled from the GUI (main) thread");
2772
2773	Q_D(QWindow);
2774	if (d->updateRequestPending || !d->platformWindow)
2775	return;
2776	d->updateRequestPending = true;
2777	d->platformWindow->requestUpdate();
2778	}
2779
2780	/*!
2781	Override this to handle key press events (\a ev).
2782
2783	\sa keyReleaseEvent()
2784	*/
2785	void QWindow::keyPressEvent(QKeyEvent *ev)
2786	{
2787	ev->ignore();
2788	}
2789
2790	/*!
2791	Override this to handle key release events (\a ev).
2792
2793	\sa keyPressEvent()
2794	*/
2795	void QWindow::keyReleaseEvent(QKeyEvent *ev)
2796	{
2797	ev->ignore();
2798	}
2799
2800	/*!
2801	Override this to handle focus in events (\a ev).
2802
2803	Focus in events are sent when the window receives keyboard focus.
2804
2805	\sa focusOutEvent()
2806	*/
2807	void QWindow::focusInEvent(QFocusEvent *ev)
2808	{
2809	ev->ignore();
2810	}
2811
2812	/*!
2813	Override this to handle focus out events (\a ev).
2814
2815	Focus out events are sent when the window loses keyboard focus.
2816
2817	\sa focusInEvent()
2818	*/
2819	void QWindow::focusOutEvent(QFocusEvent *ev)
2820	{
2821	ev->ignore();
2822	}
2823
2824	/*!
2825	Override this to handle mouse press events (\a ev).
2826
2827	\sa mouseReleaseEvent()
2828	*/
2829	void QWindow::mousePressEvent(QMouseEvent *ev)
2830	{
2831	ev->ignore();
2832	}
2833
2834	/*!
2835	Override this to handle mouse release events (\a ev).
2836
2837	\sa mousePressEvent()
2838	*/
2839	void QWindow::mouseReleaseEvent(QMouseEvent *ev)
2840	{
2841	ev->ignore();
2842	}
2843
2844	/*!
2845	Override this to handle mouse double click events (\a ev).
2846
2847	\sa mousePressEvent(), QStyleHints::mouseDoubleClickInterval()
2848	*/
2849	void QWindow::mouseDoubleClickEvent(QMouseEvent *ev)
2850	{
2851	ev->ignore();
2852	}
2853
2854	/*!
2855	Override this to handle mouse move events (\a ev).
2856	*/
2857	void QWindow::mouseMoveEvent(QMouseEvent *ev)
2858	{
2859	ev->ignore();
2860	}
2861
2862	#if QT_CONFIG(wheelevent)
2863	/*!
2864	Override this to handle mouse wheel or other wheel events (\a ev).
2865	*/
2866	void QWindow::wheelEvent(QWheelEvent *ev)
2867	{
2868	ev->ignore();
2869	}
2870	#endif // QT_CONFIG(wheelevent)
2871
2872	/*!
2873	Override this to handle touch events (\a ev).
2874	*/
2875	void QWindow::touchEvent(QTouchEvent *ev)
2876	{
2877	ev->ignore();
2878	}
2879
2880	#if QT_CONFIG(tabletevent)
2881	/*!
2882	Override this to handle tablet press, move, and release events (\a ev).
2883
2884	Proximity enter and leave events are not sent to windows, they are
2885	delivered to the application instance.
2886	*/
2887	void QWindow::tabletEvent(QTabletEvent *ev)
2888	{
2889	ev->ignore();
2890	}
2891	#endif
2892
2893	/*!
2894	Override this to handle platform dependent events.
2895	Will be given \a eventType, \a message and \a result.
2896
2897	This might make your application non-portable.
2898
2899	Should return true only if the event was handled.
2900	*/
2901
2902	bool QWindow::nativeEvent(const QByteArray &eventType, void *message, qintptr *result)
2903	{
2904	Q_UNUSED(eventType);
2905	Q_UNUSED(message);
2906	Q_UNUSED(result);
2907	return false;
2908	}
2909
2910	/*!
2911	\fn QPointF QWindow::mapToGlobal(const QPointF &pos) const
2912
2913	Translates the window coordinate \a pos to global screen
2914	coordinates. For example, \c{mapToGlobal(QPointF(0,0))} would give
2915	the global coordinates of the top-left pixel of the window.
2916
2917	\sa mapFromGlobal()
2918	\since 6.0
2919	*/
2920	QPointF QWindow::mapToGlobal(const QPointF &pos) const
2921	{
2922	Q_D(const QWindow);
2923	// QTBUG-43252, prefer platform implementation for foreign windows.
2924	if (d->platformWindow
2925	&& (d->platformWindow->isForeignWindow() || d->platformWindow->isEmbedded())) {
2926	return QHighDpi::fromNativeGlobalPosition(value: d->platformWindow->mapToGlobalF(pos: QHighDpi::toNativeLocalPosition(value: pos, context: this)), context: this);
2927	}
2928
2929	if (!QHighDpiScaling::isActive())
2930	return pos + d->globalPosition();
2931
2932	// The normal pos + windowGlobalPos calculation may give a point which is outside
2933	// screen geometry for windows which span multiple screens, due to the way QHighDpiScaling
2934	// creates gaps between screens in the the device indendent cooordinate system.
2935	//
2936	// Map the position (and the window's global position) to native coordinates, perform
2937	// the addition, and then map back to device independent coordinates.
2938	QPointF nativeLocalPos = QHighDpi::toNativeLocalPosition(value: pos, context: this);
2939	// Get the native window position directly from the platform window
2940	// if available (it can be null if the window hasn't been shown yet),
2941	// or fall back to scaling the QWindow position.
2942	QPointF nativeWindowGlobalPos = d->platformWindow
2943	? d->platformWindow->mapToGlobal(pos: QPoint(0,0)).toPointF()
2944	: QHighDpi::toNativeGlobalPosition(value: QPointF(d->globalPosition()), context: this);
2945	QPointF nativeGlobalPos = nativeLocalPos + nativeWindowGlobalPos;
2946	QPointF deviceIndependentGlobalPos = QHighDpi::fromNativeGlobalPosition(value: nativeGlobalPos, context: this);
2947	return deviceIndependentGlobalPos;
2948	}
2949
2950	/*!
2951	\overload
2952	*/
2953	QPoint QWindow::mapToGlobal(const QPoint &pos) const
2954	{
2955	return mapToGlobal(pos: QPointF(pos)).toPoint();
2956	}
2957
2958	/*!
2959	\fn QPointF QWindow::mapFromGlobal(const QPointF &pos) const
2960
2961	Translates the global screen coordinate \a pos to window
2962	coordinates.
2963
2964	\sa mapToGlobal()
2965	\since 6.0
2966	*/
2967	QPointF QWindow::mapFromGlobal(const QPointF &pos) const
2968	{
2969	Q_D(const QWindow);
2970	// QTBUG-43252, prefer platform implementation for foreign windows.
2971	if (d->platformWindow
2972	&& (d->platformWindow->isForeignWindow() || d->platformWindow->isEmbedded())) {
2973	return QHighDpi::fromNativeLocalPosition(value: d->platformWindow->mapFromGlobalF(pos: QHighDpi::toNativeGlobalPosition(value: pos, context: this)), context: this);
2974	}
2975
2976	if (!QHighDpiScaling::isActive())
2977	return pos - d->globalPosition();
2978
2979	// Calculate local position in the native coordinate system. (See comment for the
2980	// corresponding mapToGlobal() code above).
2981	QPointF nativeGlobalPos = QHighDpi::toNativeGlobalPosition(value: pos, context: this);
2982	// Get the native window position directly from the platform window
2983	// if available (it can be null if the window hasn't been shown yet),
2984	// or fall back to scaling the QWindow position.
2985	QPointF nativeWindowGlobalPos = d->platformWindow
2986	? d->platformWindow->mapToGlobal(pos: QPoint(0,0)).toPointF()
2987	: QHighDpi::toNativeGlobalPosition(value: QPointF(d->globalPosition()), context: this);
2988	QPointF nativeLocalPos = nativeGlobalPos - nativeWindowGlobalPos;
2989	QPointF deviceIndependentLocalPos = QHighDpi::fromNativeLocalPosition(value: nativeLocalPos, context: this);
2990	return deviceIndependentLocalPos;
2991	}
2992
2993	/*!
2994	\overload
2995	*/
2996	QPoint QWindow::mapFromGlobal(const QPoint &pos) const
2997	{
2998	return QWindow::mapFromGlobal(pos: QPointF(pos)).toPoint();
2999	}
3000
3001	QPoint QWindowPrivate::globalPosition() const
3002	{
3003	Q_Q(const QWindow);
3004	QPoint offset = q->position();
3005	for (const QWindow *p = q->parent(); p; p = p->parent()) {
3006	QPlatformWindow *pw = p->handle();
3007	if (pw && (pw->isForeignWindow() || pw->isEmbedded())) {
3008	// Use mapToGlobal() for foreign windows
3009	offset += p->mapToGlobal(pos: QPoint(0, 0));
3010	break;
3011	} else {
3012	offset += p->position();
3013	}
3014	}
3015	return offset;
3016	}
3017
3018	Q_GUI_EXPORT QWindowPrivate *qt_window_private(QWindow *window)
3019	{
3020	return window->d_func();
3021	}
3022
3023	QWindow *QWindowPrivate::topLevelWindow(QWindow::AncestorMode mode) const
3024	{
3025	Q_Q(const QWindow);
3026
3027	QWindow *window = const_cast<QWindow *>(q);
3028
3029	while (window) {
3030	QWindow *parent = window->parent(mode);
3031	if (!parent)
3032	break;
3033
3034	window = parent;
3035	}
3036
3037	return window;
3038	}
3039
3040	/*!
3041	Creates a local representation of a window created by another process or by
3042	using native libraries below Qt.
3043
3044	Given the handle \a id to a native window, this method creates a QWindow
3045	object which can be used to represent the window when invoking methods like
3046	setParent() and setTransientParent().
3047
3048	This can be used, on platforms which support it, to embed a QWindow inside a
3049	native window, or to embed a native window inside a QWindow.
3050
3051	If foreign windows are not supported or embedding the native window
3052	failed in the platform plugin, this function returns \nullptr.
3053
3054	\note The resulting QWindow should not be used to manipulate the underlying
3055	native window (besides re-parenting), or to observe state changes of the
3056	native window. Any support for these kind of operations is incidental, highly
3057	platform dependent and untested.
3058
3059	\sa setParent()
3060	*/
3061	QWindow *QWindow::fromWinId(WId id)
3062	{
3063	if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(cap: QPlatformIntegration::ForeignWindows)) {
3064	qWarning(msg: "QWindow::fromWinId(): platform plugin does not support foreign windows.");
3065	return nullptr;
3066	}
3067
3068	QWindow *window = new QWindow;
3069
3070	// Persist the winId in a private property so that we
3071	// can recreate the window after being destroyed.
3072	window->setProperty(name: kForeignWindowId, value: id);
3073	window->create();
3074
3075	if (!window->handle()) {
3076	delete window;
3077	return nullptr;
3078	}
3079
3080	return window;
3081	}
3082
3083	/*!
3084	Causes an alert to be shown for \a msec milliseconds. If \a msec is \c 0 (the
3085	default), then the alert is shown indefinitely until the window becomes
3086	active again. This function has no effect on an active window.
3087
3088	In alert state, the window indicates that it demands attention, for example by
3089	flashing or bouncing the taskbar entry.
3090
3091	\since 5.1
3092	*/
3093
3094	void QWindow::alert(int msec)
3095	{
3096	Q_D(QWindow);
3097	if (!d->platformWindow || d->platformWindow->isAlertState() || isActive())
3098	return;
3099	d->platformWindow->setAlertState(true);
3100	if (d->platformWindow->isAlertState() && msec)
3101	QTimer::singleShot(msec, receiver: this, SLOT(_q_clearAlert()));
3102	}
3103
3104	void QWindowPrivate::_q_clearAlert()
3105	{
3106	if (platformWindow && platformWindow->isAlertState())
3107	platformWindow->setAlertState(false);
3108	}
3109
3110	#ifndef QT_NO_CURSOR
3111	/*!
3112	\brief set the cursor shape for this window
3113
3114	The mouse \a cursor will assume this shape when it is over this
3115	window, unless an override cursor is set.
3116	See the \l{Qt::CursorShape}{list of predefined cursor objects} for a
3117	range of useful shapes.
3118
3119	If no cursor has been set, or after a call to unsetCursor(), the
3120	parent window's cursor is used.
3121
3122	By default, the cursor has the Qt::ArrowCursor shape.
3123
3124	Some underlying window implementations will reset the cursor if it
3125	leaves a window even if the mouse is grabbed. If you want to have
3126	a cursor set for all windows, even when outside the window, consider
3127	QGuiApplication::setOverrideCursor().
3128
3129	\sa QGuiApplication::setOverrideCursor()
3130	*/
3131	void QWindow::setCursor(const QCursor &cursor)
3132	{
3133	Q_D(QWindow);
3134	d->setCursor(&cursor);
3135	}
3136
3137	/*!
3138	\brief Restores the default arrow cursor for this window.
3139	*/
3140	void QWindow::unsetCursor()
3141	{
3142	Q_D(QWindow);
3143	d->setCursor(nullptr);
3144	}
3145
3146	/*!
3147	\brief the cursor shape for this window
3148
3149	\sa setCursor(), unsetCursor()
3150	*/
3151	QCursor QWindow::cursor() const
3152	{
3153	Q_D(const QWindow);
3154	return d->cursor;
3155	}
3156
3157	void QWindowPrivate::setCursor(const QCursor *newCursor)
3158	{
3159
3160	Q_Q(QWindow);
3161	if (newCursor) {
3162	const Qt::CursorShape newShape = newCursor->shape();
3163	if (newShape <= Qt::LastCursor && hasCursor && newShape == cursor.shape())
3164	return; // Unchanged and no bitmap/custom cursor.
3165	cursor = *newCursor;
3166	hasCursor = true;
3167	} else {
3168	if (!hasCursor)
3169	return;
3170	cursor = QCursor(Qt::ArrowCursor);
3171	hasCursor = false;
3172	}
3173	// Only attempt to emit signal if there is an actual platform cursor
3174	if (applyCursor()) {
3175	QEvent event(QEvent::CursorChange);
3176	QGuiApplication::sendEvent(receiver: q, event: &event);
3177	}
3178	}
3179
3180	// Apply the cursor and returns true iff the platform cursor exists
3181	bool QWindowPrivate::applyCursor()
3182	{
3183	Q_Q(QWindow);
3184	if (QScreen *screen = q->screen()) {
3185	if (QPlatformCursor *platformCursor = screen->handle()->cursor()) {
3186	if (!platformWindow)
3187	return true;
3188	QCursor *c = QGuiApplication::overrideCursor();
3189	if (c != nullptr && platformCursor->capabilities().testFlag(flag: QPlatformCursor::OverrideCursor))
3190	return true;
3191	if (!c && hasCursor)
3192	c = &cursor;
3193	platformCursor->changeCursor(windowCursor: c, window: q);
3194	return true;
3195	}
3196	}
3197	return false;
3198	}
3199	#endif // QT_NO_CURSOR
3200
3201	void *QWindow::resolveInterface(const char *name, int revision) const
3202	{
3203	using namespace QNativeInterface::Private;
3204
3205	auto *platformWindow = handle();
3206	Q_UNUSED(platformWindow);
3207	Q_UNUSED(name);
3208	Q_UNUSED(revision);
3209
3210	#if defined(Q_OS_WIN)
3211	QT_NATIVE_INTERFACE_RETURN_IF(QWindowsWindow, platformWindow);
3212	#endif
3213
3214	#if QT_CONFIG(xcb)
3215	QT_NATIVE_INTERFACE_RETURN_IF(QXcbWindow, platformWindow);
3216	#endif
3217
3218	#if defined(Q_OS_MACOS)
3219	QT_NATIVE_INTERFACE_RETURN_IF(QCocoaWindow, platformWindow);
3220	#endif
3221
3222	#if QT_CONFIG(wayland)
3223	QT_NATIVE_INTERFACE_RETURN_IF(QWaylandWindow, platformWindow);
3224	#endif
3225
3226	#if defined(Q_OS_WASM)
3227	QT_NATIVE_INTERFACE_RETURN_IF(QWasmWindow, platformWindow);
3228	#endif
3229
3230	return nullptr;
3231	}
3232
3233	#ifndef QT_NO_DEBUG_STREAM
3234	QDebug operator<<(QDebug debug, const QWindow *window)
3235	{
3236	QDebugStateSaver saver(debug);
3237	debug.nospace();
3238	if (window) {
3239	debug << window->metaObject()->className() << '(' << (const void *)window;
3240	if (!window->objectName().isEmpty())
3241	debug << ", name=" << window->objectName();
3242	if (debug.verbosity() > 2) {
3243	const QRect geometry = window->geometry();
3244	if (window->isVisible())
3245	debug << ", visible";
3246	if (window->isExposed())
3247	debug << ", exposed";
3248	debug << ", state=" << window->windowState()
3249	<< ", type=" << window->type() << ", flags=" << window->flags()
3250	<< ", surface type=" << window->surfaceType();
3251	if (window->isTopLevel())
3252	debug << ", toplevel";
3253	debug << ", " << geometry.width() << 'x' << geometry.height()
3254	<< Qt::forcesign << geometry.x() << geometry.y() << Qt::noforcesign;
3255	const QMargins margins = window->frameMargins();
3256	if (!margins.isNull())
3257	debug << ", margins=" << margins;
3258	debug << ", devicePixelRatio=" << window->devicePixelRatio();
3259	if (const QPlatformWindow *platformWindow = window->handle())
3260	debug << ", winId=0x" << Qt::hex << platformWindow->winId() << Qt::dec;
3261	if (const QScreen *screen = window->screen())
3262	debug << ", on " << screen->name();
3263	}
3264	debug << ')';
3265	} else {
3266	debug << "QWindow(0x0)";
3267	}
3268	return debug;
3269	}
3270	#endif // !QT_NO_DEBUG_STREAM
3271
3272	#if QT_CONFIG(vulkan) || defined(Q_QDOC)
3273
3274	/*!
3275	Associates this window with the specified Vulkan \a instance.
3276
3277	\a instance must stay valid as long as this QWindow instance exists.
3278	*/
3279	void QWindow::setVulkanInstance(QVulkanInstance *instance)
3280	{
3281	Q_D(QWindow);
3282	d->vulkanInstance = instance;
3283	}
3284
3285	/*!
3286	\return the associated Vulkan instance if any was set, otherwise \nullptr.
3287	*/
3288	QVulkanInstance *QWindow::vulkanInstance() const
3289	{
3290	Q_D(const QWindow);
3291	return d->vulkanInstance;
3292	}
3293
3294	#endif // QT_CONFIG(vulkan)
3295
3296	QT_END_NAMESPACE
3297
3298	#include "moc_qwindow.cpp"
3299