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#ifndef QWIDGETREPAINTMANAGER_P_H
5#define QWIDGETREPAINTMANAGER_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtWidgets/private/qtwidgetsglobal_p.h>
19#include <QDebug>
20#include <QtWidgets/qwidget.h>
21#include <private/qwidget_p.h>
22#include <QtGui/qbackingstore.h>
23
24QT_BEGIN_NAMESPACE
25
26class QPlatformTextureList;
27class QPlatformTextureListWatcher;
28class QWidgetRepaintManager;
29
30class Q_WIDGETS_EXPORT QWidgetRepaintManager
31{
32 Q_GADGET
33public:
34 enum UpdateTime {
35 UpdateNow,
36 UpdateLater
37 };
38 Q_ENUM(UpdateTime)
39
40 enum BufferState{
41 BufferValid,
42 BufferInvalid
43 };
44 Q_ENUM(BufferState)
45
46 QWidgetRepaintManager(QWidget *t);
47 ~QWidgetRepaintManager();
48
49 QBackingStore *backingStore() const { return store; }
50 void setBackingStore(QBackingStore *backingStore) { store = backingStore; }
51
52 template <class T>
53 void markDirty(const T &r, QWidget *widget, UpdateTime updateTime = UpdateLater,
54 BufferState bufferState = BufferValid);
55
56 void removeDirtyWidget(QWidget *w);
57
58 void sync(QWidget *exposedWidget, const QRegion &exposedRegion);
59 void sync();
60
61 void markNeedsFlush(QWidget *widget, const QRegion &region, const QPoint &topLevelOffset);
62
63 void addStaticWidget(QWidget *widget);
64 void moveStaticWidgets(QWidget *reparented);
65 void removeStaticWidget(QWidget *widget);
66 QRegion staticContents(QWidget *widget = nullptr, const QRect &withinClipRect = QRect()) const;
67 QRegion dirtyRegion() const { return dirty; }
68 QList<QWidget *> dirtyWidgetList() const { return dirtyWidgets; }
69 bool isDirty() const;
70
71 bool bltRect(const QRect &rect, int dx, int dy, QWidget *widget);
72
73private:
74 void updateLists(QWidget *widget);
75
76 void addDirtyWidget(QWidget *widget, const QRegion &rgn);
77 void resetWidget(QWidget *widget);
78
79 void addDirtyRenderToTextureWidget(QWidget *widget);
80
81 void sendUpdateRequest(QWidget *widget, UpdateTime updateTime);
82
83 bool syncAllowed();
84 void paintAndFlush();
85
86 void markNeedsFlush(QWidget *widget, const QRegion &region = QRegion());
87
88 void flush();
89 void flush(QWidget *widget, const QRegion &region, QPlatformTextureList *widgetTextures);
90
91 bool hasStaticContents() const;
92 void updateStaticContentsSize();
93
94 QWidget *tlw = nullptr;
95 QBackingStore *store = nullptr;
96
97 QRegion dirty; // needsRepaint
98 QList<QWidget *> dirtyWidgets;
99 QList<QWidget *> dirtyRenderToTextureWidgets;
100
101 QRegion topLevelNeedsFlush;
102 QList<QWidget *> needsFlushWidgets;
103
104 QList<QWidget *> staticWidgets;
105
106 QPlatformTextureListWatcher *textureListWatcher = nullptr;
107
108 bool updateRequestSent = false;
109
110 QElapsedTimer perfTime;
111 int perfFrames = 0;
112
113 Q_DISABLE_COPY_MOVE(QWidgetRepaintManager)
114};
115
116QT_END_NAMESPACE
117
118#endif // QWIDGETREPAINTMANAGER_P_H
119

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source code of qtbase/src/widgets/kernel/qwidgetrepaintmanager_p.h