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Fixes to get dwt to work with dmd and ldc
author Jacob Carlborg <doob@me.com>
date Wed, 08 Jul 2009 21:56:44 +0200
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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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15 import dwt.dwthelper.utils;
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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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26 import tango.util.Convert;
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27 static import tango.text.Util;
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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 &lt; 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
0
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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 }