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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QPAINTENGINE_P_H |
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43 #define QPAINTENGINE_P_H |
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44 |
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45 // |
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46 // W A R N I N G |
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47 // ------------- |
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48 // |
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49 // This file is not part of the Qt API. It exists for the convenience |
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50 // of other Qt classes. This header file may change from version to |
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51 // version without notice, or even be removed. |
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52 // |
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53 // We mean it. |
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54 // |
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55 |
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56 #include "QtGui/qpainter.h" |
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57 #include "QtGui/qpaintengine.h" |
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58 #include "QtGui/qregion.h" |
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59 #include "private/qobject_p.h" |
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60 |
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61 QT_BEGIN_NAMESPACE |
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62 |
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63 class QPaintDevice; |
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64 |
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65 class QPaintEnginePrivate |
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66 { |
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67 Q_DECLARE_PUBLIC(QPaintEngine) |
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68 public: |
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69 QPaintEnginePrivate() : pdev(0), q_ptr(0), currentClipWidget(0), hasSystemTransform(0), |
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70 hasSystemViewport(0) {} |
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71 virtual ~QPaintEnginePrivate() { } |
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72 QPaintDevice *pdev; |
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73 QPaintEngine *q_ptr; |
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74 QRegion systemClip; |
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75 QRect systemRect; |
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76 QRegion systemViewport; |
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77 QTransform systemTransform; |
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78 QWidget *currentClipWidget; |
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79 uint hasSystemTransform : 1; |
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80 uint hasSystemViewport : 1; |
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81 |
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82 inline void transformSystemClip() |
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83 { |
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84 if (systemClip.isEmpty()) |
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85 return; |
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86 |
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87 if (hasSystemTransform) { |
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88 if (systemTransform.type() <= QTransform::TxTranslate) |
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89 systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy())); |
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90 else |
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91 systemClip = systemTransform.map(systemClip); |
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92 } |
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93 |
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94 // Make sure we're inside the viewport. |
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95 if (hasSystemViewport) { |
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96 systemClip &= systemViewport; |
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97 if (systemClip.isEmpty()) { |
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98 // We don't want to paint without system clip, so set it to 1 pixel :) |
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99 systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1)); |
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100 } |
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101 } |
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102 } |
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103 |
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104 inline void setSystemTransform(const QTransform &xform) |
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105 { |
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106 systemTransform = xform; |
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107 if ((hasSystemTransform = !xform.isIdentity()) || hasSystemViewport) |
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108 transformSystemClip(); |
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109 systemStateChanged(); |
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110 } |
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111 |
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112 inline void setSystemViewport(const QRegion ®ion) |
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113 { |
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114 systemViewport = region; |
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115 hasSystemViewport = !systemViewport.isEmpty(); |
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116 } |
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117 |
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118 virtual void systemStateChanged() { } |
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119 |
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120 void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti); |
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121 }; |
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122 |
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123 QT_END_NAMESPACE |
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124 |
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125 #endif // QPAINTENGINE_P_H |