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40 | ****************************************************************************/ |
41 | |
42 | #ifndef QPAINTENGINE_P_H |
43 | #define QPAINTENGINE_P_H |
44 | |
45 | // |
46 | // W A R N I N G |
47 | // ------------- |
48 | // |
49 | // This file is not part of the Qt API. It exists for the convenience |
50 | // of other Qt classes. This header file may change from version to |
51 | // version without notice, or even be removed. |
52 | // |
53 | // We mean it. |
54 | // |
55 | |
56 | #include "QtGui/qpainter.h" |
57 | #include "QtGui/qpaintengine.h" |
58 | #include "QtGui/qregion.h" |
59 | #include "private/qobject_p.h" |
60 | |
61 | QT_BEGIN_NAMESPACE |
62 | |
63 | class QPaintDevice; |
64 | |
65 | class QPaintEnginePrivate |
66 | { |
67 | Q_DECLARE_PUBLIC(QPaintEngine) |
68 | public: |
69 | QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipWidget(0), hasSystemTransform(0), |
70 | hasSystemViewport(0) {} |
71 | virtual ~QPaintEnginePrivate() { } |
72 | QPaintDevice *pdev; |
73 | QPaintEngine *q_ptr; |
74 | QRegion systemClip; |
75 | QRect systemRect; |
76 | QRegion systemViewport; |
77 | QTransform systemTransform; |
78 | QWidget *currentClipWidget; |
79 | uint hasSystemTransform : 1; |
80 | uint hasSystemViewport : 1; |
81 | |
82 | inline void transformSystemClip() |
83 | { |
84 | if (systemClip.isEmpty()) |
85 | return; |
86 | |
87 | if (hasSystemTransform) { |
88 | if (systemTransform.type() <= QTransform::TxTranslate) |
89 | systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy())); |
90 | else |
91 | systemClip = systemTransform.map(systemClip); |
92 | } |
93 | |
94 | // Make sure we're inside the viewport. |
95 | if (hasSystemViewport) { |
96 | systemClip &= systemViewport; |
97 | if (systemClip.isEmpty()) { |
98 | // We don't want to paint without system clip, so set it to 1 pixel :) |
99 | systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1)); |
100 | } |
101 | } |
102 | } |
103 | |
104 | inline void setSystemTransform(const QTransform &xform) |
105 | { |
106 | systemTransform = xform; |
107 | if ((hasSystemTransform = !xform.isIdentity()) || hasSystemViewport) |
108 | transformSystemClip(); |
109 | systemStateChanged(); |
110 | } |
111 | |
112 | inline void setSystemViewport(const QRegion ®ion) |
113 | { |
114 | systemViewport = region; |
115 | hasSystemViewport = !systemViewport.isEmpty(); |
116 | } |
117 | |
118 | virtual void systemStateChanged() { } |
119 | |
120 | void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti); |
121 | }; |
122 | |
123 | QT_END_NAMESPACE |
124 | |
125 | #endif // QPAINTENGINE_P_H |
126 | |