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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 ** Contact: Qt Software Information (qt-info@nokia.com)
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5 **
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6 ** This file is part of the examples of the Qt Toolkit.
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7 **
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8 ** $QT_BEGIN_LICENSE:LGPL$
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9 ** Commercial Usage
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10 ** Licensees holding valid Qt Commercial licenses may use this file in
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11 ** accordance with the Qt Commercial License Agreement provided with the
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12 ** Software or, alternatively, in accordance with the terms contained in
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13 ** a written agreement between you and Nokia.
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14 **
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15 ** GNU Lesser General Public License Usage
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16 ** Alternatively, this file may be used under the terms of the GNU Lesser
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17 ** General Public License version 2.1 as published by the Free Software
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18 ** Foundation and appearing in the file LICENSE.LGPL included in the
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19 ** packaging of this file. Please review the following information to
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20 ** ensure the GNU Lesser General Public License version 2.1 requirements
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21 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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22 **
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23 ** In addition, as a special exception, Nokia gives you certain
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24 ** additional rights. These rights are described in the Nokia Qt LGPL
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25 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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26 ** package.
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27 **
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28 ** GNU General Public License Usage
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29 ** Alternatively, this file may be used under the terms of the GNU
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30 ** General Public License version 3.0 as published by the Free Software
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31 ** Foundation and appearing in the file LICENSE.GPL included in the
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32 ** packaging of this file. Please review the following information to
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33 ** ensure the GNU General Public License version 3.0 requirements will be
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34 ** met: http://www.gnu.org/copyleft/gpl.html.
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35 **
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36 ** If you are unsure which license is appropriate for your use, please
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37 ** contact the sales department at qt-sales@nokia.com.
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38 ** $QT_END_LICENSE$
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39 **
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40 ****************************************************************************/
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41 module borderlayout;
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42
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43
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44 import qt.gui.QLayout;
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45 import qt.gui.QWidgetItem;
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46 import qt.gui.QTextBrowser;
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47 import qt.core.QSize;
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48 import qt.core.QRect;
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49
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50
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51 class BorderLayout : public QLayout
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52 {
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53 public:
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54
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55 enum Position { West, North, South, East, Center };
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56
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57 this(QWidget parent, int margin = 0, int spacing = -1)
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58 {
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59 super(parent);
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60 setMargin(margin);
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61 setWidgetSpacing(spacing);
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62 }
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63
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64 this(int spacing = -1)
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65 {
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66 setWidgetSpacing(spacing);
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67 }
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68
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69 ~this()
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70 {
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71 QLayoutItem l = takeAt(0);
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72 while (l) {
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73 delete l;
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74 l = takeAt(0);
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75 }
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76 }
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77
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78 void addItem(IQLayoutItem item)
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79 {
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80 add(item, Position.West);
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81 }
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82
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83 void addWidget(QWidget widget, Position position)
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84 {
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85 add(cast(IQLayoutItem) new QWidgetItem(widget), position);
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86 }
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87
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88 int expandingDirections()
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89 {
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90 return Qt.Horizontal | Qt.Vertical;
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91 }
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92
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93 bool hasHeightForWidth()
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94 {
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95 return false;
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96 }
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97
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98 int count()
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99 {
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100 return list.length;
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101 }
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102
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103 QLayoutItem itemAt(int index)
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104 {
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105 if(index >= 0 && index < list.length)
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106 return list[index].item;
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107 else
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108 return null;
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109 }
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110
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111 QSize minimumSize()
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112 {
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113 return calculateSize(SizeType.MinimumSize);
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114 }
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115
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116 void setGeometry(QRect rect)
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117 {
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118 ItemWrapper center = null;
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119 int eastWidth = 0;
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120 int westWidth = 0;
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121 int northHeight = 0;
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122 int southHeight = 0;
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123 int centerHeight = 0;
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124 int i;
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125
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126 super.setGeometry(rect);
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127
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128 for (i = 0; i < list.length; ++i) {
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129 ItemWrapper wrapper = list[i];
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130 IQLayoutItem item = wrapper.item;
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131 Position position = wrapper.position;
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132
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133 if (position == Position.North) {
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134 item.setGeometry(QRect(rect.x(), northHeight, rect.width(),
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135 item.sizeHint().height()));
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136
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137 northHeight += item.geometry().height() + widgetSpacing();
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138 } else if (position == Position.South) {
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139 item.setGeometry(QRect(item.geometry().x(),
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140 item.geometry().y(), rect.width(),
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141 item.sizeHint().height()));
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142
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143 southHeight += item.geometry().height() + widgetSpacing();
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144
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145 item.setGeometry(QRect(rect.x(),
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146 rect.y() + rect.height() - southHeight + widgetSpacing(),
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147 item.geometry().width(),
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148 item.geometry().height()));
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149 } else if (position == Position.Center) {
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150 center = wrapper;
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151 }
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152 }
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153
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154 centerHeight = rect.height() - northHeight - southHeight;
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155
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156 for (i = 0; i < list.length; ++i) {
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157 ItemWrapper wrapper = list[i];
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158 IQLayoutItem item = wrapper.item;
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159 Position position = wrapper.position;
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160
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161 if (position == Position.West) {
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162 item.setGeometry(QRect(rect.x() + westWidth, northHeight,
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163 item.sizeHint().width(), centerHeight));
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164
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165 westWidth += item.geometry().width() + widgetSpacing();
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166 } else if (position == Position.East) {
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167 item.setGeometry(QRect(item.geometry().x(), item.geometry().y(),
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168 item.sizeHint().width(), centerHeight));
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169
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170 eastWidth += item.geometry().width() + widgetSpacing();
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171
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172 item.setGeometry(QRect(
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173 rect.x() + rect.width() - eastWidth + widgetSpacing(),
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174 northHeight, item.geometry().width(),
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175 item.geometry().height()));
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176 }
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177 }
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178
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179 if (center)
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180 center.item.setGeometry(QRect(westWidth, northHeight,
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181 rect.width() - eastWidth - westWidth,
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182 centerHeight));
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183 }
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184
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185 QSize sizeHint()
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186 {
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187 return calculateSize(SizeType.SizeHint);
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188 }
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189
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190 QLayoutItem takeAt(int index)
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191 {
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192 if (index >= 0 && index < list.length) {
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193 ItemWrapper layoutStruct = list[index];
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194 return layoutStruct.item;
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195 }
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196 return null;
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197 }
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198
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199 void add(IQLayoutItem item, Position position)
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200 {
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201 list ~= new ItemWrapper(item, position);
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202 }
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203
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204 private:
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205
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206 class ItemWrapper
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207 {
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208 this(IQLayoutItem i, Position p)
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209 {
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210 item = i;
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211 position = p;
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212 }
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213
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214 IQLayoutItem item;
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215 Position position;
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216 };
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217
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218 enum SizeType { MinimumSize, SizeHint };
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219
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220 QSize calculateSize(SizeType sizeType)
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221 {
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222 QSize totalSize;
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223
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224 for (int i = 0; i < list.length; ++i) {
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225 ItemWrapper wrapper = list[i];
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226 Position position = wrapper.position;
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227 QSize itemSize;
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228
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229 if (sizeType == SizeType.MinimumSize)
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230 itemSize = wrapper.item.minimumSize();
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231 else // (sizeType == SizeHint)
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232 itemSize = wrapper.item.sizeHint();
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233
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234 if (position == Position.North || position == Position.South || position == Position.Center)
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235 totalSize.setHeight(totalSize.height + itemSize.height);
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236
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237 if (position == Position.West || position == Position.East || position == Position.Center)
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238 totalSize.setWidth(totalSize.width + itemSize.width);
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239 }
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240 return totalSize;
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241 }
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242
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243 ItemWrapper[] list;
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244 }
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