include/QtGui/qbackingstore.h

0001 // Copyright (C) 2016 The Qt Company Ltd.
0002 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
0003
0004 #ifndef QBACKINGSTORE_H
0005 #define QBACKINGSTORE_H
0006
0007 #include <QtGui/qtguiglobal.h>
0008 #include <QtCore/qrect.h>
0009
0010 #include <QtGui/qwindow.h>
0011 #include <QtGui/qregion.h>
0012
0013 QT_BEGIN_NAMESPACE
0014
0015
0016 class QRegion;
0017 class QRect;
0018 class QPoint;
0019 class QImage;
0020 class QBackingStorePrivate;
0021 class QPlatformBackingStore;
0022
0023 class Q_GUI_EXPORT QBackingStore
0024 {
0025 public:
0026     explicit QBackingStore(QWindow *window);
0027     ~QBackingStore();
0028
0029     QWindow *window() const;
0030
0031     QPaintDevice *paintDevice();
0032
0033     void flush(const QRegion &region, QWindow *window = nullptr, const QPoint &offset = QPoint());
0034
0035     void resize(const QSize &size);
0036     QSize size() const;
0037
0038     bool scroll(const QRegion &area, int dx, int dy);
0039
0040     void beginPaint(const QRegion &);
0041     void endPaint();
0042
0043     void setStaticContents(const QRegion &region);
0044     QRegion staticContents() const;
0045     bool hasStaticContents() const;
0046
0047     QPlatformBackingStore *handle() const;
0048
0049 private:
0050     QScopedPointer<QBackingStorePrivate> d_ptr;
0051 };
0052
0053 QT_END_NAMESPACE
0054
0055 #endif // QBACKINGSTORE_H