Mercurial > projects > dwt-mac
annotate dwt/custom/StackLayout.d @ 41:6337764516f1
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author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 07 Oct 2008 16:29:55 +0200 |
parents | 380af2bdd8e5 |
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rev | line source |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 * Port to the D programming language: |
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11 * Frank Benoit <benoit@tionex.de> |
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12 *******************************************************************************/ |
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13 module dwt.custom.StackLayout; |
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14 |
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15 import dwt.dwthelper.utils; |
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16 |
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17 |
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18 |
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19 import dwt.DWT; |
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20 import dwt.graphics.Point; |
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21 import dwt.graphics.Rectangle; |
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22 import dwt.widgets.Composite; |
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23 import dwt.widgets.Control; |
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24 import dwt.widgets.Layout; |
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25 |
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26 import tango.util.Convert; |
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27 static import tango.text.Util; |
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28 |
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29 /** |
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30 * This Layout stacks all the controls one on top of the other and resizes all controls |
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31 * to have the same size and location. |
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32 * The control specified in topControl is visible and all other controls are not visible. |
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33 * Users must set the topControl value to flip between the visible items and then call |
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34 * layout() on the composite which has the StackLayout. |
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35 * |
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36 * <p> Here is an example which places ten buttons in a stack layout and |
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37 * flips between them: |
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38 * |
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39 * <pre><code> |
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40 * public static void main(String[] args) { |
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41 * Display display = new Display(); |
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42 * Shell shell = new Shell(display); |
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43 * shell.setLayout(new GridLayout()); |
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44 * |
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45 * final Composite parent = new Composite(shell, DWT.NONE); |
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46 * parent.setLayoutData(new GridData(GridData.FILL_BOTH)); |
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47 * final StackLayout layout = new StackLayout(); |
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48 * parent.setLayout(layout); |
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49 * final Button[] bArray = new Button[10]; |
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50 * for (int i = 0; i < 10; i++) { |
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51 * bArray[i] = new Button(parent, DWT.PUSH); |
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52 * bArray[i].setText("Button "+i); |
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53 * } |
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54 * layout.topControl = bArray[0]; |
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55 * |
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56 * Button b = new Button(shell, DWT.PUSH); |
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57 * b.setText("Show Next Button"); |
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58 * final int[] index = new int[1]; |
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59 * b.addListener(DWT.Selection, new Listener(){ |
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60 * public void handleEvent(Event e) { |
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61 * index[0] = (index[0] + 1) % 10; |
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62 * layout.topControl = bArray[index[0]]; |
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63 * parent.layout(); |
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64 * } |
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65 * }); |
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66 * |
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67 * shell.open(); |
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68 * while (shell !is null && !shell.isDisposed()) { |
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69 * if (!display.readAndDispatch()) |
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70 * display.sleep(); |
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71 * } |
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72 * } |
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73 * </code></pre> |
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74 * |
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75 * @see <a href="http://www.eclipse.org/swt/snippets/#stacklayout">StackLayout snippets</a> |
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76 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: LayoutExample</a> |
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77 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
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78 */ |
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79 |
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80 public class StackLayout : Layout { |
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81 |
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82 /** |
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83 * marginWidth specifies the number of pixels of horizontal margin |
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84 * that will be placed along the left and right edges of the layout. |
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85 * |
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86 * The default value is 0. |
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87 */ |
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88 public int marginWidth = 0; |
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89 /** |
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90 * marginHeight specifies the number of pixels of vertical margin |
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91 * that will be placed along the top and bottom edges of the layout. |
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92 * |
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93 * The default value is 0. |
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94 */ |
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95 public int marginHeight = 0; |
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96 |
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97 /** |
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98 * topControl the Control that is displayed at the top of the stack. |
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99 * All other controls that are children of the parent composite will not be visible. |
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100 */ |
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101 public Control topControl; |
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102 |
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103 protected override Point computeSize(Composite composite, int wHint, int hHint, bool flushCache) { |
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104 Control children[] = composite.getChildren(); |
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105 int maxWidth = 0; |
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106 int maxHeight = 0; |
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107 for (int i = 0; i < children.length; i++) { |
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108 Point size = children[i].computeSize(wHint, hHint, flushCache); |
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109 maxWidth = Math.max(size.x, maxWidth); |
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110 maxHeight = Math.max(size.y, maxHeight); |
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111 } |
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112 int width = maxWidth + 2 * marginWidth; |
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113 int height = maxHeight + 2 * marginHeight; |
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114 if (wHint !is DWT.DEFAULT) width = wHint; |
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115 if (hHint !is DWT.DEFAULT) height = hHint; |
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116 return new Point(width, height); |
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117 } |
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118 |
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119 protected override bool flushCache(Control control) { |
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120 return true; |
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121 } |
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122 |
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123 protected override void layout(Composite composite, bool flushCache) { |
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124 Control children[] = composite.getChildren(); |
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125 Rectangle rect = composite.getClientArea(); |
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126 rect.x += marginWidth; |
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127 rect.y += marginHeight; |
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128 rect.width -= 2 * marginWidth; |
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129 rect.height -= 2 * marginHeight; |
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130 for (int i = 0; i < children.length; i++) { |
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131 children[i].setBounds(rect); |
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132 children[i].setVisible(children[i] is topControl); |
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133 |
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134 } |
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135 } |
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136 |
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137 String getName () { |
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138 String string = this.classinfo.name; |
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139 int index = tango.text.Util.locatePrior( string ,'.'); |
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140 if (index is string.length ) return string; |
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141 return string[ index + 1 .. $ ]; |
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142 } |
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143 |
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144 /** |
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145 * Returns a string containing a concise, human-readable |
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146 * description of the receiver. |
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147 * |
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148 * @return a string representation of the layout |
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149 */ |
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150 public override String toString () { |
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151 String string = getName ()~" {"; |
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152 if (marginWidth !is 0) string ~= "marginWidth="~to!(String)(marginWidth)~" "; |
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153 if (marginHeight !is 0) string ~= "marginHeight="~to!(String)(marginHeight)~" "; |
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154 if (topControl !is null) string ~= "topControl="~to!(String)(topControl)~" "; |
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155 string = tango.text.Util.trim(string); |
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156 string ~= "}"; |
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157 return string; |
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158 } |
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159 } |