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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 dwtx.ui.forms.widgets.ToggleHyperlink;
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14
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15 import dwtx.ui.forms.widgets.AbstractHyperlink;
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16
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17 import dwt.DWT;
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18 import dwt.accessibility.ACC;
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19 import dwt.accessibility.AccessibleAdapter;
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20 import dwt.accessibility.AccessibleControlAdapter;
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21 import dwt.accessibility.AccessibleControlEvent;
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22 import dwt.accessibility.AccessibleEvent;
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23 import dwt.graphics.Color;
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24 import dwt.graphics.Point;
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25 import dwt.graphics.Rectangle;
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26 import dwt.widgets.Composite;
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27 import dwt.widgets.Event;
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28 import dwt.widgets.Listener;
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29 import dwtx.ui.forms.events.HyperlinkAdapter;
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30 import dwtx.ui.forms.events.HyperlinkEvent;
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31 import dwtx.ui.internal.forms.Messages;
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32
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33 import dwt.dwthelper.utils;
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34
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35 /**
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36 * A custom selectable control that can be used to control areas that can be
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37 * expanded or collapsed.
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38 * <p>
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39 * This is an abstract class. Subclasses are responsible for rendering the
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40 * control using decoration and hover decoration color. Control should be
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41 * rendered based on the current expansion state.
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42 *
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43 * @since 3.0
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44 */
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45 public abstract class ToggleHyperlink : AbstractHyperlink {
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46 protected int innerWidth;
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47 protected int innerHeight;
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48 protected bool hover;
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49 package bool hover_package(){
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50 return hover;
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51 }
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52 package bool hover_package( bool v){
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53 return (hover = v);
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54 }
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55 private bool expanded;
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56 private Color decorationColor;
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57 private Color hoverColor;
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58 /**
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59 * Creates a control in a provided composite.
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60 *
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61 * @param parent
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62 * the parent
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63 * @param style
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64 * the style
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65 */
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66 public this(Composite parent, int style) {
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67 super(parent, style);
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68 Listener listener = new class Listener {
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69 public void handleEvent(Event e) {
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70 switch (e.type) {
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71 case DWT.MouseEnter:
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72 hover=true;
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73 redraw();
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74 break;
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75 case DWT.MouseExit:
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76 hover = false;
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77 redraw();
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78 break;
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79 case DWT.KeyDown:
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80 onKeyDown(e);
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81 break;
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82 }
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83 }
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84 };
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85 addListener(DWT.MouseEnter, listener);
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86 addListener(DWT.MouseExit, listener);
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87 addListener(DWT.KeyDown, listener);
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88 addHyperlinkListener(new class HyperlinkAdapter {
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89 public void linkActivated(HyperlinkEvent e) {
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90 setExpanded(!isExpanded());
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91 }
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92 });
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93 initAccessible();
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94 }
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95 /**
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96 * Sets the color of the decoration.
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97 *
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98 * @param decorationColor
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99 */
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100 public void setDecorationColor(Color decorationColor) {
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101 this.decorationColor = decorationColor;
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102 }
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103 /**
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104 * Returns the color of the decoration.
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105 *
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106 * @return decoration color
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107 */
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108 public Color getDecorationColor() {
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109 return decorationColor;
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110 }
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111 /**
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112 * Sets the hover color of decoration. Hover color will be used when mouse
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113 * enters the decoration area.
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114 *
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115 * @param hoverColor
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116 * the hover color to use
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117 */
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118 public void setHoverDecorationColor(Color hoverColor) {
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119 this.hoverColor = hoverColor;
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120 }
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121 /**
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122 * Returns the hover color of the decoration.
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123 *
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124 * @return the hover color of the decoration.
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125 * @since 3.1
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126 */
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127 public Color getHoverDecorationColor() {
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128 return hoverColor;
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129 }
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130
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131 /**
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132 * Returns the hover color of the decoration.
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133 *
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134 * @return the hover color of the decoration.
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135 * @deprecated use <code>getHoverDecorationColor</code>
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136 * @see #getHoverDecorationColor()
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137 */
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138 public Color geHoverDecorationColor() {
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139 return hoverColor;
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140 }
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141 /**
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142 * Computes the size of the control.
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143 *
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144 * @param wHint
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145 * width hint
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146 * @param hHint
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147 * height hint
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148 * @param changed
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149 * if true, flush any saved layout state
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150 */
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151 public Point computeSize(int wHint, int hHint, bool changed) {
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152 int width, height;
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153 /*
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154 if (wHint !is DWT.DEFAULT)
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155 width = wHint;
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156 else */
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157 width = innerWidth + 2 * marginWidth;
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158 /*
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159 if (hHint !is DWT.DEFAULT)
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160 height = hHint;
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161 else */
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162 height = innerHeight + 2 * marginHeight;
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163 return new Point(width, height);
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164 }
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165 /**
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166 * Returns the expansion state of the toggle control. When toggle is in the
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167 * normal (downward) state, the value is <samp>true </samp>. Collapsed
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168 * control will return <samp>false </samp>.
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169 *
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170 * @return <samp>false </samp> if collapsed, <samp>true </samp> otherwise.
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171 */
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172 public bool isExpanded() {
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173 return expanded;
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174 }
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175 /**
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176 * Sets the expansion state of the twistie control
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177 *
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178 * @param expanded the expansion state
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179 */
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180 public void setExpanded(bool expanded) {
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181 this.expanded = expanded;
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182 getAccessible().selectionChanged();
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183 redraw();
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184 }
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185 private void initAccessible() {
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186 getAccessible().addAccessibleListener(new class AccessibleAdapter {
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187 public void getHelp(AccessibleEvent e) {
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188 e.result = getToolTipText();
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189 }
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190 public void getName(AccessibleEvent e) {
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191 String name=Messages.ToggleHyperlink_accessibleName;
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192 if (null !is cast(ExpandableComposite)getParent() ) {
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193 name ~= Messages.ToggleHyperlink_accessibleColumn ~ (cast(ExpandableComposite)getParent()).getText();
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194 int index = name.indexOf('&');
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195 if (index !is -1) {
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196 name = name.substring(0, index) + name.substring(index + 1);
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197 }
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198 }
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199 e.result = name;
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200 }
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201 public void getDescription(AccessibleEvent e) {
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202 getName(e);
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203 }
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204 });
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205 getAccessible().addAccessibleControlListener(
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206 new class AccessibleControlAdapter {
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207 public void getChildAtPoint(AccessibleControlEvent e) {
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208 Point testPoint = toControl(new Point(e.x, e.y));
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209 if (getBounds().contains(testPoint)) {
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210 e.childID = ACC.CHILDID_SELF;
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211 }
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212 }
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213 public void getLocation(AccessibleControlEvent e) {
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214 Rectangle location = getBounds();
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215 Point pt = toDisplay(new Point(location.x, location.y));
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216 e.x = pt.x;
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217 e.y = pt.y;
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218 e.width = location.width;
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219 e.height = location.height;
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220 }
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221 public void getSelection (AccessibleControlEvent e) {
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222 if (this.outer.getSelection())
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223 e.childID = ACC.CHILDID_SELF;
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224 }
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225
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226 public void getFocus (AccessibleControlEvent e) {
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227 if (this.outer.getSelection())
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228 e.childID = ACC.CHILDID_SELF;
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229 }
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230 public void getChildCount(AccessibleControlEvent e) {
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231 e.detail = 0;
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232 }
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233 public void getRole(AccessibleControlEvent e) {
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234 e.detail = ACC.ROLE_TREE;
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235 }
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236 public void getState(AccessibleControlEvent e) {
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237 int state = ACC.STATE_FOCUSABLE;
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238 if (this.outer.getSelection())
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239 state |= ACC.STATE_FOCUSED;
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240 state |= this.outer.isExpanded()
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241 ? ACC.STATE_EXPANDED
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242 : ACC.STATE_COLLAPSED;
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243 e.detail = state;
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244 }
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245 });
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246 }
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247 private void onKeyDown(Event e) {
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248 if (e.keyCodeisDWT.ARROW_RIGHT) {
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249 // expand if collapsed
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250 if (!isExpanded()) {
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251 handleActivate(e);
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252 }
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253 e.doit=false;
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254 }
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255 else if (e.keyCodeisDWT.ARROW_LEFT) {
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256 // collapse if expanded
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257 if (isExpanded()) {
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258 handleActivate(e);
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259 }
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260 e.doit=false;
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261 }
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262 }
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263 }
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