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39
40#include "qshapedpixmapdndwindow_p.h"
41
42#include "qplatformwindow.h"
43
44#include <QtGui/QPainter>
45#include <QtGui/QCursor>
46#include <QtGui/QGuiApplication>
47#include <QtGui/QPalette>
48#include <QtGui/QBitmap>
49
50QT_BEGIN_NAMESPACE
51
52QShapedPixmapWindow::QShapedPixmapWindow(QScreen *screen)
53 : m_useCompositing(true)
54{
55 setScreen(screen);
56 QSurfaceFormat format;
57 format.setAlphaBufferSize(8);
58 setFormat(format);
59 setFlags(Qt::ToolTip | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint
60 | Qt::WindowTransparentForInput | Qt::WindowDoesNotAcceptFocus);
61}
62
63QShapedPixmapWindow::~QShapedPixmapWindow()
64{
65}
66
67void QShapedPixmapWindow::setPixmap(const QPixmap &pixmap)
68{
69 m_pixmap = pixmap;
70 if (!m_useCompositing) {
71 const QBitmap mask = m_pixmap.mask();
72 if (!mask.isNull()) {
73 if (!handle())
74 create();
75 if (auto platformWindow = handle()) {
76 const auto pixmapDpr = m_pixmap.devicePixelRatio();
77 const auto winDpr = devicePixelRatio();
78 const auto maskSize = (QSizeF(m_pixmap.size()) * winDpr / pixmapDpr).toSize();
79 platformWindow->setMask(QBitmap(mask.scaled(s: maskSize)));
80 }
81 }
82 }
83}
84
85void QShapedPixmapWindow::setHotspot(const QPoint &hotspot)
86{
87 m_hotSpot = hotspot;
88}
89
90void QShapedPixmapWindow::paintEvent(QPaintEvent *)
91{
92 if (!m_pixmap.isNull()) {
93 const QRect rect(QPoint(0, 0), size());
94 QPainter painter(this);
95 if (m_useCompositing)
96 painter.setCompositionMode(QPainter::CompositionMode_Source);
97 else
98 painter.fillRect(rect, QGuiApplication::palette().base());
99 painter.drawPixmap(r: rect, pm: m_pixmap);
100 }
101}
102
103void QShapedPixmapWindow::updateGeometry(const QPoint &pos)
104{
105 QSize size(1, 1);
106 if (!m_pixmap.isNull()) {
107 size = qFuzzyCompare(p1: m_pixmap.devicePixelRatio(), p2: qreal(1.0))
108 ? m_pixmap.size()
109 : (QSizeF(m_pixmap.size()) / m_pixmap.devicePixelRatio()).toSize();
110 }
111 setGeometry(QRect(pos - m_hotSpot, size));
112}
113
114QT_END_NAMESPACE
115

source code of qtbase/src/gui/kernel/qshapedpixmapdndwindow.cpp