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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 #ifndef QTRANSFORM_H |
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42 #define QTRANSFORM_H |
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43 |
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44 #include <QtGui/qmatrix.h> |
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45 #include <QtGui/qpainterpath.h> |
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46 #include <QtGui/qpolygon.h> |
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47 #include <QtGui/qregion.h> |
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48 #include <QtGui/qwindowdefs.h> |
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49 #include <QtCore/qline.h> |
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50 #include <QtCore/qpoint.h> |
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51 #include <QtCore/qrect.h> |
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52 |
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53 #if defined(Q_OS_VXWORKS) && defined(m_type) |
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54 # undef m_type |
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55 #endif |
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56 |
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57 QT_BEGIN_HEADER |
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58 |
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59 QT_BEGIN_NAMESPACE |
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60 |
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61 QT_MODULE(Gui) |
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62 |
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63 class QVariant; |
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64 |
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65 class Q_GUI_EXPORT QTransform |
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66 { |
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67 Q_ENUMS(TransformationType) |
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68 public: |
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69 enum TransformationType { |
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70 TxNone = 0x00, |
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71 TxTranslate = 0x01, |
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72 TxScale = 0x02, |
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73 TxRotate = 0x04, |
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74 TxShear = 0x08, |
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75 TxProject = 0x10 |
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76 }; |
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77 |
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78 inline explicit QTransform(Qt::Initialization) : affine(Qt::Uninitialized) {} |
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79 QTransform(); |
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80 QTransform(qreal h11, qreal h12, qreal h13, |
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81 qreal h21, qreal h22, qreal h23, |
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82 qreal h31, qreal h32, qreal h33 = 1.0); |
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83 QTransform(qreal h11, qreal h12, qreal h21, |
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84 qreal h22, qreal dx, qreal dy); |
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85 explicit QTransform(const QMatrix &mtx); |
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86 |
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87 bool isAffine() const; |
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88 bool isIdentity() const; |
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89 bool isInvertible() const; |
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90 bool isScaling() const; |
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91 bool isRotating() const; |
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92 bool isTranslating() const; |
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93 |
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94 TransformationType type() const; |
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95 |
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96 inline qreal determinant() const; |
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97 qreal det() const; |
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98 |
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99 qreal m11() const; |
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100 qreal m12() const; |
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101 qreal m13() const; |
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102 qreal m21() const; |
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103 qreal m22() const; |
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104 qreal m23() const; |
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105 qreal m31() const; |
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106 qreal m32() const; |
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107 qreal m33() const; |
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108 qreal dx() const; |
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109 qreal dy() const; |
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110 |
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111 void setMatrix(qreal m11, qreal m12, qreal m13, |
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112 qreal m21, qreal m22, qreal m23, |
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113 qreal m31, qreal m32, qreal m33); |
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114 |
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115 QTransform inverted(bool *invertible = 0) const; |
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116 QTransform adjoint() const; |
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117 QTransform transposed() const; |
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118 |
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119 QTransform &translate(qreal dx, qreal dy); |
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120 QTransform &scale(qreal sx, qreal sy); |
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121 QTransform &shear(qreal sh, qreal sv); |
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122 QTransform &rotate(qreal a, Qt::Axis axis = Qt::ZAxis); |
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123 QTransform &rotateRadians(qreal a, Qt::Axis axis = Qt::ZAxis); |
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124 |
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125 static bool squareToQuad(const QPolygonF &square, QTransform &result); |
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126 static bool quadToSquare(const QPolygonF &quad, QTransform &result); |
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127 static bool quadToQuad(const QPolygonF &one, |
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128 const QPolygonF &two, |
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129 QTransform &result); |
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130 |
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131 bool operator==(const QTransform &) const; |
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132 bool operator!=(const QTransform &) const; |
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133 |
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134 QTransform &operator*=(const QTransform &); |
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135 QTransform operator*(const QTransform &o) const; |
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136 |
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137 QTransform &operator=(const QTransform &); |
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138 |
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139 operator QVariant() const; |
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140 |
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141 void reset(); |
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142 QPoint map(const QPoint &p) const; |
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143 QPointF map(const QPointF &p) const; |
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144 QLine map(const QLine &l) const; |
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145 QLineF map(const QLineF &l) const; |
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146 QPolygonF map(const QPolygonF &a) const; |
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147 QPolygon map(const QPolygon &a) const; |
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148 QRegion map(const QRegion &r) const; |
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149 QPainterPath map(const QPainterPath &p) const; |
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150 QPolygon mapToPolygon(const QRect &r) const; |
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151 QRect mapRect(const QRect &) const; |
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152 QRectF mapRect(const QRectF &) const; |
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153 void map(int x, int y, int *tx, int *ty) const; |
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154 void map(qreal x, qreal y, qreal *tx, qreal *ty) const; |
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155 |
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156 const QMatrix &toAffine() const; |
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157 |
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158 QTransform &operator*=(qreal div); |
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159 QTransform &operator/=(qreal div); |
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160 QTransform &operator+=(qreal div); |
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161 QTransform &operator-=(qreal div); |
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162 |
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163 static QTransform fromTranslate(qreal dx, qreal dy); |
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164 static QTransform fromScale(qreal dx, qreal dy); |
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165 |
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166 private: |
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167 inline QTransform(qreal h11, qreal h12, qreal h13, |
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168 qreal h21, qreal h22, qreal h23, |
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169 qreal h31, qreal h32, qreal h33, bool) |
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170 : affine(h11, h12, h21, h22, h31, h32, true) |
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171 , m_13(h13), m_23(h23), m_33(h33) |
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172 , m_type(TxNone) |
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173 , m_dirty(TxProject) {} |
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174 inline QTransform(bool) |
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175 : affine(true) |
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176 , m_13(0), m_23(0), m_33(1) |
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177 , m_type(TxNone) |
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178 , m_dirty(TxNone) {} |
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179 inline TransformationType inline_type() const; |
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180 QMatrix affine; |
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181 qreal m_13; |
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182 qreal m_23; |
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183 qreal m_33; |
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184 |
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185 mutable uint m_type : 5; |
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186 mutable uint m_dirty : 5; |
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187 |
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188 class Private; |
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189 Private *d; |
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190 }; |
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191 Q_DECLARE_TYPEINFO(QTransform, Q_MOVABLE_TYPE); |
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192 |
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193 /******* inlines *****/ |
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194 inline QTransform::TransformationType QTransform::inline_type() const |
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195 { |
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196 if (m_dirty == TxNone) |
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197 return static_cast<TransformationType>(m_type); |
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198 return type(); |
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199 } |
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200 |
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201 inline bool QTransform::isAffine() const |
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202 { |
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203 return inline_type() < TxProject; |
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204 } |
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205 inline bool QTransform::isIdentity() const |
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206 { |
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207 return inline_type() == TxNone; |
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208 } |
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209 |
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210 inline bool QTransform::isInvertible() const |
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211 { |
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212 return !qFuzzyIsNull(determinant()); |
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213 } |
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214 |
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215 inline bool QTransform::isScaling() const |
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216 { |
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217 return type() >= TxScale; |
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218 } |
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219 inline bool QTransform::isRotating() const |
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220 { |
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221 return inline_type() >= TxRotate; |
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222 } |
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223 |
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224 inline bool QTransform::isTranslating() const |
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225 { |
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226 return inline_type() >= TxTranslate; |
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227 } |
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228 |
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229 inline qreal QTransform::determinant() const |
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230 { |
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231 return affine._m11*(m_33*affine._m22-affine._dy*m_23) - |
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232 affine._m21*(m_33*affine._m12-affine._dy*m_13)+affine._dx*(m_23*affine._m12-affine._m22*m_13); |
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233 } |
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234 inline qreal QTransform::det() const |
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235 { |
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236 return determinant(); |
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237 } |
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238 inline qreal QTransform::m11() const |
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239 { |
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240 return affine._m11; |
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241 } |
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242 inline qreal QTransform::m12() const |
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243 { |
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244 return affine._m12; |
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245 } |
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246 inline qreal QTransform::m13() const |
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247 { |
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248 return m_13; |
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249 } |
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250 inline qreal QTransform::m21() const |
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251 { |
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252 return affine._m21; |
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253 } |
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254 inline qreal QTransform::m22() const |
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255 { |
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256 return affine._m22; |
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257 } |
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258 inline qreal QTransform::m23() const |
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259 { |
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260 return m_23; |
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261 } |
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262 inline qreal QTransform::m31() const |
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263 { |
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264 return affine._dx; |
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265 } |
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266 inline qreal QTransform::m32() const |
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267 { |
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268 return affine._dy; |
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269 } |
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270 inline qreal QTransform::m33() const |
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271 { |
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272 return m_33; |
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273 } |
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274 inline qreal QTransform::dx() const |
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275 { |
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276 return affine._dx; |
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277 } |
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278 inline qreal QTransform::dy() const |
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279 { |
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280 return affine._dy; |
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281 } |
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282 |
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283 inline QTransform &QTransform::operator*=(qreal num) |
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284 { |
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285 if (num == 1.) |
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286 return *this; |
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287 affine._m11 *= num; |
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288 affine._m12 *= num; |
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289 m_13 *= num; |
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290 affine._m21 *= num; |
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291 affine._m22 *= num; |
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292 m_23 *= num; |
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293 affine._dx *= num; |
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294 affine._dy *= num; |
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295 m_33 *= num; |
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296 m_dirty |= TxScale; |
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297 return *this; |
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298 } |
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299 inline QTransform &QTransform::operator/=(qreal div) |
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300 { |
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301 if (div == 0) |
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302 return *this; |
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303 div = 1/div; |
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304 return operator*=(div); |
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305 } |
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306 inline QTransform &QTransform::operator+=(qreal num) |
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307 { |
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308 if (num == 0) |
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309 return *this; |
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310 affine._m11 += num; |
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311 affine._m12 += num; |
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312 m_13 += num; |
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313 affine._m21 += num; |
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314 affine._m22 += num; |
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315 m_23 += num; |
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316 affine._dx += num; |
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317 affine._dy += num; |
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318 m_33 += num; |
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319 m_dirty |= TxProject; |
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320 return *this; |
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321 } |
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322 inline QTransform &QTransform::operator-=(qreal num) |
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323 { |
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324 if (num == 0) |
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325 return *this; |
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326 affine._m11 -= num; |
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327 affine._m12 -= num; |
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328 m_13 -= num; |
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329 affine._m21 -= num; |
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330 affine._m22 -= num; |
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331 m_23 -= num; |
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332 affine._dx -= num; |
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333 affine._dy -= num; |
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334 m_33 -= num; |
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335 m_dirty |= TxProject; |
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336 return *this; |
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337 } |
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338 |
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339 inline bool qFuzzyCompare(const QTransform& t1, const QTransform& t2) |
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340 { |
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341 return qFuzzyCompare(t1.m11(), t2.m11()) |
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342 && qFuzzyCompare(t1.m12(), t2.m12()) |
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343 && qFuzzyCompare(t1.m13(), t2.m13()) |
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344 && qFuzzyCompare(t1.m21(), t2.m21()) |
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345 && qFuzzyCompare(t1.m22(), t2.m22()) |
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346 && qFuzzyCompare(t1.m23(), t2.m23()) |
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347 && qFuzzyCompare(t1.m31(), t2.m31()) |
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348 && qFuzzyCompare(t1.m32(), t2.m32()) |
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349 && qFuzzyCompare(t1.m33(), t2.m33()); |
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350 } |
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351 |
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352 |
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353 /****** stream functions *******************/ |
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354 #ifndef QT_NO_DATASTREAM |
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355 Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QTransform &); |
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356 Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QTransform &); |
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357 #endif |
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358 |
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359 #ifndef QT_NO_DEBUG_STREAM |
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360 Q_GUI_EXPORT QDebug operator<<(QDebug, const QTransform &); |
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361 #endif |
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362 /****** end stream functions *******************/ |
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363 |
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364 // mathematical semantics |
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365 Q_GUI_EXPORT_INLINE QPoint operator*(const QPoint &p, const QTransform &m) |
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366 { return m.map(p); } |
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367 Q_GUI_EXPORT_INLINE QPointF operator*(const QPointF &p, const QTransform &m) |
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368 { return m.map(p); } |
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369 Q_GUI_EXPORT_INLINE QLineF operator*(const QLineF &l, const QTransform &m) |
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370 { return m.map(l); } |
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371 Q_GUI_EXPORT_INLINE QLine operator*(const QLine &l, const QTransform &m) |
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372 { return m.map(l); } |
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373 Q_GUI_EXPORT_INLINE QPolygon operator *(const QPolygon &a, const QTransform &m) |
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374 { return m.map(a); } |
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375 Q_GUI_EXPORT_INLINE QPolygonF operator *(const QPolygonF &a, const QTransform &m) |
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376 { return m.map(a); } |
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377 Q_GUI_EXPORT_INLINE QRegion operator *(const QRegion &r, const QTransform &m) |
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378 { return m.map(r); } |
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379 Q_GUI_EXPORT_INLINE QPainterPath operator *(const QPainterPath &p, const QTransform &m) |
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380 { return m.map(p); } |
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381 |
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382 Q_GUI_EXPORT_INLINE QTransform operator *(const QTransform &a, qreal n) |
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383 { QTransform t(a); t *= n; return t; } |
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384 Q_GUI_EXPORT_INLINE QTransform operator /(const QTransform &a, qreal n) |
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385 { QTransform t(a); t /= n; return t; } |
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386 Q_GUI_EXPORT_INLINE QTransform operator +(const QTransform &a, qreal n) |
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387 { QTransform t(a); t += n; return t; } |
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388 Q_GUI_EXPORT_INLINE QTransform operator -(const QTransform &a, qreal n) |
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389 { QTransform t(a); t -= n; return t; } |
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390 |
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391 QT_END_NAMESPACE |
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392 |
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393 QT_END_HEADER |
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394 |
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395 #endif |