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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 QSIZEPOLICY_H |
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43 #define QSIZEPOLICY_H |
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44 |
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45 #include <QtCore/qobject.h> |
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46 |
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47 QT_BEGIN_HEADER |
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48 |
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49 QT_BEGIN_NAMESPACE |
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50 |
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51 QT_MODULE(Gui) |
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52 |
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53 class QVariant; |
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54 |
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55 class Q_GUI_EXPORT QSizePolicy |
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56 { |
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57 Q_GADGET |
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58 Q_ENUMS(Policy) |
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59 |
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60 private: |
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61 enum SizePolicyMasks { |
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62 HSize = 4, |
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63 HMask = 0x0f, |
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64 VMask = HMask << HSize, |
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65 CTShift = 9, |
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66 CTSize = 5, |
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67 WFHShift = CTShift + CTSize, |
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68 CTMask = ((0x1 << CTSize) - 1) << CTShift, |
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69 UnusedShift = CTShift + CTSize, |
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70 UnusedSize = 2 |
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71 }; |
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72 |
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73 public: |
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74 enum PolicyFlag { |
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75 GrowFlag = 1, |
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76 ExpandFlag = 2, |
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77 ShrinkFlag = 4, |
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78 IgnoreFlag = 8 |
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79 }; |
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80 |
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81 enum Policy { |
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82 Fixed = 0, |
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83 Minimum = GrowFlag, |
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84 Maximum = ShrinkFlag, |
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85 Preferred = GrowFlag | ShrinkFlag, |
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86 MinimumExpanding = GrowFlag | ExpandFlag, |
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87 Expanding = GrowFlag | ShrinkFlag | ExpandFlag, |
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88 Ignored = ShrinkFlag | GrowFlag | IgnoreFlag |
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89 }; |
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90 |
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91 enum ControlType { |
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92 DefaultType = 0x00000001, |
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93 ButtonBox = 0x00000002, |
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94 CheckBox = 0x00000004, |
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95 ComboBox = 0x00000008, |
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96 Frame = 0x00000010, |
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97 GroupBox = 0x00000020, |
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98 Label = 0x00000040, |
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99 Line = 0x00000080, |
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100 LineEdit = 0x00000100, |
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101 PushButton = 0x00000200, |
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102 RadioButton = 0x00000400, |
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103 Slider = 0x00000800, |
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104 SpinBox = 0x00001000, |
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105 TabWidget = 0x00002000, |
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106 ToolButton = 0x00004000 |
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107 }; |
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108 Q_DECLARE_FLAGS(ControlTypes, ControlType) |
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109 |
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110 QSizePolicy() : data(0) { } |
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111 |
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112 // ### Qt 5: merge these two constructors (with type == DefaultType) |
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113 QSizePolicy(Policy horizontal, Policy vertical) |
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114 : data(horizontal | (vertical << HSize)) { } |
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115 QSizePolicy(Policy horizontal, Policy vertical, ControlType type) |
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116 : data(horizontal | (vertical << HSize)) { setControlType(type); } |
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117 |
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118 Policy horizontalPolicy() const { return static_cast<Policy>(data & HMask); } |
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119 Policy verticalPolicy() const { return static_cast<Policy>((data & VMask) >> HSize); } |
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120 ControlType controlType() const; |
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121 |
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122 void setHorizontalPolicy(Policy d) { data = (data & ~HMask) | d; } |
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123 void setVerticalPolicy(Policy d) { data = (data & ~(HMask << HSize)) | (d << HSize); } |
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124 void setControlType(ControlType type); |
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125 |
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126 Qt::Orientations expandingDirections() const { |
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127 Qt::Orientations result; |
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128 if (verticalPolicy() & ExpandFlag) |
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129 result |= Qt::Vertical; |
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130 if (horizontalPolicy() & ExpandFlag) |
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131 result |= Qt::Horizontal; |
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132 return result; |
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133 } |
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134 |
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135 void setHeightForWidth(bool b) { data = b ? (data | (1 << 2*HSize)) : (data & ~(1 << 2*HSize)); } |
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136 bool hasHeightForWidth() const { return data & (1 << 2*HSize); } |
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137 |
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138 bool operator==(const QSizePolicy& s) const { return data == s.data; } |
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139 bool operator!=(const QSizePolicy& s) const { return data != s.data; } |
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140 operator QVariant() const; // implemented in qabstractlayout.cpp |
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141 |
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142 int horizontalStretch() const { return data >> 24; } |
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143 int verticalStretch() const { return (data >> 16) & 0xff; } |
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144 void setHorizontalStretch(uchar stretchFactor) { data = (data&0x00ffffff) | (uint(stretchFactor)<<24); } |
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145 void setVerticalStretch(uchar stretchFactor) { data = (data&0xff00ffff) | (uint(stretchFactor)<<16); } |
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146 |
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147 void transpose(); |
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148 |
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149 #ifdef QT3_SUPPORT |
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150 typedef Policy SizeType; |
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151 #ifndef qdoc |
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152 typedef Qt::Orientations ExpandData; |
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153 enum { |
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154 NoDirection = 0, |
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155 Horizontally = 1, |
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156 Vertically = 2, |
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157 BothDirections = Horizontally | Vertically |
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158 }; |
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159 #else |
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160 enum ExpandData { |
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161 NoDirection = 0x0, |
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162 Horizontally = 0x1, |
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163 Vertically = 0x2, |
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164 BothDirections = 0x3 |
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165 }; |
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166 #endif // qdoc |
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167 |
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168 inline QT3_SUPPORT bool mayShrinkHorizontally() const |
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169 { return horizontalPolicy() & ShrinkFlag; } |
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170 inline QT3_SUPPORT bool mayShrinkVertically() const { return verticalPolicy() & ShrinkFlag; } |
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171 inline QT3_SUPPORT bool mayGrowHorizontally() const { return horizontalPolicy() & GrowFlag; } |
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172 inline QT3_SUPPORT bool mayGrowVertically() const { return verticalPolicy() & GrowFlag; } |
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173 inline QT3_SUPPORT Qt::Orientations expanding() const { return expandingDirections(); } |
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174 |
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175 QT3_SUPPORT_CONSTRUCTOR QSizePolicy(Policy hor, Policy ver, bool hfw) |
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176 : data(hor | (ver<<HSize) | (hfw ? (1U<<2*HSize) : 0)) { } |
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177 |
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178 QT3_SUPPORT_CONSTRUCTOR QSizePolicy(Policy hor, Policy ver, uchar hors, uchar vers, bool hfw = false) |
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179 : data(hor | (ver<<HSize) | (hfw ? (1U<<2*HSize) : 0)) { |
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180 setHorizontalStretch(hors); |
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181 setVerticalStretch(vers); |
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182 } |
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183 |
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184 inline QT3_SUPPORT Policy horData() const { return static_cast<Policy>(data & HMask); } |
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185 inline QT3_SUPPORT Policy verData() const { return static_cast<Policy>((data & VMask) >> HSize); } |
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186 inline QT3_SUPPORT void setHorData(Policy d) { setHorizontalPolicy(d); } |
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187 inline QT3_SUPPORT void setVerData(Policy d) { setVerticalPolicy(d); } |
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188 |
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189 inline QT3_SUPPORT uint horStretch() const { return horizontalStretch(); } |
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190 inline QT3_SUPPORT uint verStretch() const { return verticalStretch(); } |
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191 inline QT3_SUPPORT void setHorStretch(uchar sf) { setHorizontalStretch(sf); } |
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192 inline QT3_SUPPORT void setVerStretch(uchar sf) { setVerticalStretch(sf); } |
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193 #endif |
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194 |
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195 private: |
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196 #ifndef QT_NO_DATASTREAM |
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197 friend Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &); |
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198 friend Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &); |
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199 #endif |
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200 QSizePolicy(int i) : data(i) { } |
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201 |
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202 quint32 data; |
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203 /* use bit flags instead, keep it here for improved readability for now |
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204 quint32 horzPolicy : 4; |
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205 quint32 vertPolicy : 4; |
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206 quint32 hfw : 1; |
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207 quint32 ctype : 5; |
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208 quint32 wfh : 1; |
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209 quint32 padding : 1; // we cannot use the highest bit |
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210 quint32 horStretch : 8; |
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211 quint32 verStretch : 8; |
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212 */ |
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213 |
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214 }; |
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215 |
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216 Q_DECLARE_OPERATORS_FOR_FLAGS(QSizePolicy::ControlTypes) |
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217 |
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218 #ifndef QT_NO_DATASTREAM |
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219 // implemented in qlayout.cpp |
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220 Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &); |
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221 Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &); |
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222 #endif |
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223 |
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224 inline void QSizePolicy::transpose() { |
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225 Policy hData = horizontalPolicy(); |
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226 Policy vData = verticalPolicy(); |
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227 uchar hStretch = uchar(horizontalStretch()); |
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228 uchar vStretch = uchar(verticalStretch()); |
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229 setHorizontalPolicy(vData); |
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230 setVerticalPolicy(hData); |
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231 setHorizontalStretch(vStretch); |
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232 setVerticalStretch(hStretch); |
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233 } |
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234 |
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235 QT_END_NAMESPACE |
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236 |
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237 QT_END_HEADER |
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238 |
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239 #endif // QSIZEPOLICY_H |