qrasterwindow.cpp

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1 /**************************************************************************** -

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4 ** Contact: http://www.qt.io/licensing/ -

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6 ** This file is part of the QtGui module of the Qt Toolkit. -

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8 ** $QT_BEGIN_LICENSE:LGPL21$ -

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32 ****************************************************************************/ -

33 -

34 #include "qrasterwindow.h" -

35 -

36 #include <QtGui/private/qpaintdevicewindow_p.h> -

37 -

38 #include <QtGui/QBackingStore> -

39 #include <QtGui/QPainter> -

40 -

41 QT_BEGIN_NAMESPACE -

42 -

43 /*! -

44 \class QRasterWindow -

45 \inmodule QtGui -

46 \since 5.4 -

47 \brief QRasterWindow is a convenience class for using QPainter on a QWindow -

48 -

49 QRasterWindow is a QWindow with a raster-based, non-OpenGL surface. On top of -

50 the functionality offered by QWindow, QRasterWindow adds a virtual -

51 paintEvent() function and the possibility to open a QPainter on itself. The -

52 underlying paint engine will be the raster one, meaning that all drawing will -

53 happen on the CPU. For performing accelerated, OpenGL-based drawing, use -

54 QOpenGLWindow instead. -

55 -

56 Internally the class is thin wrapper for QWindow and QBackingStore -

57 and is very similar to the \l{Raster Window Example}{Raster Window -

58 Example} that uses these classes directly. -

59 -

60 \sa QPaintDeviceWindow::paintEvent(), QPaintDeviceWindow::update() -

61 */ -

62 -

63 class QRasterWindowPrivate : public QPaintDeviceWindowPrivate -

64 { -

65 Q_DECLARE_PUBLIC(QRasterWindow) -

66 public: -

67 void beginPaint(const QRegion &region) Q_DECL_OVERRIDE -

68 { -

69 Q_Q(QRasterWindow); -

if (backingstore->size() != q->size()) {

backingstore->...) != q->size()	Description
TRUE	never evaluated
FALSE	never evaluated

71 backingstore->resize(q->size()); -

72 markWindowAsDirty(); -

}

never executed: end of block

74 backingstore->beginPaint(region); -

}

never executed: end of block

76 -

77 void endPaint() Q_DECL_OVERRIDE -

78 { -

79 backingstore->endPaint(); -

}

never executed: end of block

81 -

82 void flush(const QRegion &region) Q_DECL_OVERRIDE -

83 { -

84 Q_Q(QRasterWindow); -

85 backingstore->flush(region, q); -

}

never executed: end of block

87 -

88 QScopedPointer<QBackingStore> backingstore; -

89 }; -

90 -

91 /*! -

92 Constructs a new QRasterWindow with \a parent. -

93 */ -

94 QRasterWindow::QRasterWindow(QWindow *parent) -

95 : QPaintDeviceWindow(*(new QRasterWindowPrivate), parent) -

96 { -

97 setSurfaceType(QSurface::RasterSurface); -

98 d_func()->backingstore.reset(new QBackingStore(this)); -

}

never executed: end of block

100 -

101 /*! -

102 \internal -

103 */ -

104 int QRasterWindow::metric(PaintDeviceMetric metric) const -

105 { -

106 Q_D(const QRasterWindow); -

107 -

108 switch (metric) { -

109

case PdmDepth:

never executed: case PdmDepth:

110

return d->backingstore->paintDevice()->depth();

never executed: return d->backingstore->paintDevice()->depth();

111

default:

never executed: default:

112

break;

never executed: break;

113 } -

114

return QPaintDeviceWindow::metric(metric);

never executed: return QPaintDeviceWindow::metric(metric);

115 } -

116 -

117 /*! -

118 \internal -

119 */ -

120 QPaintDevice *QRasterWindow::redirected(QPoint *) const -

121 { -

122 Q_D(const QRasterWindow); -

123

return d->backingstore->paintDevice();

never executed: return d->backingstore->paintDevice();

124 } -

125 -

126 QT_END_NAMESPACE -

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