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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 import dwtx.ui.forms.widgets.ExpandableComposite;
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17
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18 import dwt.DWT;
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19 import dwt.accessibility.ACC;
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20 import dwt.accessibility.AccessibleAdapter;
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21 import dwt.accessibility.AccessibleControlAdapter;
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22 import dwt.accessibility.AccessibleControlEvent;
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23 import dwt.accessibility.AccessibleEvent;
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24 import dwt.graphics.Color;
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25 import dwt.graphics.Point;
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26 import dwt.graphics.Rectangle;
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27 import dwt.widgets.Composite;
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28 import dwt.widgets.Event;
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29 import dwt.widgets.Listener;
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30 import dwtx.ui.forms.events.HyperlinkAdapter;
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31 import dwtx.ui.forms.events.HyperlinkEvent;
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32 import dwtx.ui.internal.forms.Messages;
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33
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34 import dwt.dwthelper.utils;
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35
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36 /**
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37 * A custom selectable control that can be used to control areas that can be
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38 * expanded or collapsed.
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39 * <p>
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40 * This is an abstract class. Subclasses are responsible for rendering the
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41 * control using decoration and hover decoration color. Control should be
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42 * rendered based on the current expansion state.
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43 *
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44 * @since 3.0
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45 */
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46 public abstract class ToggleHyperlink : AbstractHyperlink {
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47 protected int innerWidth;
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48 protected int innerHeight;
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49 protected bool hover;
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50 package bool hover_package(){
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51 return hover;
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52 }
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53 package bool hover_package( bool v){
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54 return (hover = v);
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55 }
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56 private bool expanded;
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57 private Color decorationColor;
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58 private Color hoverColor;
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59 /**
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60 * Creates a control in a provided composite.
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61 *
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62 * @param parent
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63 * the parent
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64 * @param style
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65 * the style
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66 */
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67 public this(Composite parent, int style) {
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68 super(parent, style);
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69 Listener listener = new class Listener {
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70 public void handleEvent(Event e) {
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71 switch (e.type) {
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72 case DWT.MouseEnter:
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73 hover=true;
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74 redraw();
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75 break;
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76 case DWT.MouseExit:
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77 hover = false;
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78 redraw();
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79 break;
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80 case DWT.KeyDown:
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81 onKeyDown(e);
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82 break;
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83 }
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84 }
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85 };
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86 addListener(DWT.MouseEnter, listener);
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87 addListener(DWT.MouseExit, listener);
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88 addListener(DWT.KeyDown, listener);
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89 addHyperlinkListener(new class HyperlinkAdapter {
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90 public void linkActivated(HyperlinkEvent e) {
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91 setExpanded(!isExpanded());
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92 }
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93 });
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94 initAccessible();
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95 }
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96 /**
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97 * Sets the color of the decoration.
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98 *
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99 * @param decorationColor
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100 */
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101 public void setDecorationColor(Color decorationColor) {
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102 this.decorationColor = decorationColor;
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103 }
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104 /**
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105 * Returns the color of the decoration.
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106 *
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107 * @return decoration color
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108 */
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109 public Color getDecorationColor() {
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110 return decorationColor;
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111 }
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112 /**
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113 * Sets the hover color of decoration. Hover color will be used when mouse
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114 * enters the decoration area.
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115 *
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116 * @param hoverColor
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117 * the hover color to use
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118 */
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119 public void setHoverDecorationColor(Color hoverColor) {
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120 this.hoverColor = hoverColor;
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121 }
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122 /**
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123 * Returns the hover color of the decoration.
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124 *
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125 * @return the hover color of the decoration.
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126 * @since 3.1
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127 */
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128 public Color getHoverDecorationColor() {
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129 return hoverColor;
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130 }
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131
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132 /**
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133 * Returns the hover color of the decoration.
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134 *
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135 * @return the hover color of the decoration.
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136 * @deprecated use <code>getHoverDecorationColor</code>
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137 * @see #getHoverDecorationColor()
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138 */
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139 public Color geHoverDecorationColor() {
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140 return hoverColor;
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141 }
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142 /**
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143 * Computes the size of the control.
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144 *
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145 * @param wHint
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146 * width hint
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147 * @param hHint
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148 * height hint
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149 * @param changed
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150 * if true, flush any saved layout state
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151 */
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152 public Point computeSize(int wHint, int hHint, bool changed) {
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153 int width, height;
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154 /*
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155 if (wHint !is DWT.DEFAULT)
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156 width = wHint;
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157 else */
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158 width = innerWidth + 2 * marginWidth;
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159 /*
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160 if (hHint !is DWT.DEFAULT)
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161 height = hHint;
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162 else */
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163 height = innerHeight + 2 * marginHeight;
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164 return new Point(width, height);
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165 }
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166 /**
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167 * Returns the expansion state of the toggle control. When toggle is in the
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168 * normal (downward) state, the value is <samp>true </samp>. Collapsed
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169 * control will return <samp>false </samp>.
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170 *
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171 * @return <samp>false </samp> if collapsed, <samp>true </samp> otherwise.
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172 */
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173 public bool isExpanded() {
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174 return expanded;
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175 }
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176 /**
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177 * Sets the expansion state of the twistie control
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178 *
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179 * @param expanded the expansion state
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180 */
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181 public void setExpanded(bool expanded) {
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182 this.expanded = expanded;
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183 getAccessible().selectionChanged();
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184 redraw();
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185 }
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186 private void initAccessible() {
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187 getAccessible().addAccessibleListener(new class AccessibleAdapter {
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188 public void getHelp(AccessibleEvent e) {
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189 e.result = getToolTipText();
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190 }
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191 public void getName(AccessibleEvent e) {
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192 String name=Messages.ToggleHyperlink_accessibleName;
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193 if (null !is cast(ExpandableComposite)getParent() ) {
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194 name ~= Messages.ToggleHyperlink_accessibleColumn ~ (cast(ExpandableComposite)getParent()).getText();
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195 int index = name.indexOf('&');
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196 if (index !is -1) {
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197 name = name.substring(0, index) ~ name.substring(index + 1);
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198 }
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199 }
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200 e.result = name;
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201 }
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202 public void getDescription(AccessibleEvent e) {
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203 getName(e);
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204 }
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205 });
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206 getAccessible().addAccessibleControlListener(
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207 new class AccessibleControlAdapter {
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208 public void getChildAtPoint(AccessibleControlEvent e) {
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209 Point testPoint = toControl(new Point(e.x, e.y));
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210 if (getBounds().contains(testPoint)) {
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211 e.childID = ACC.CHILDID_SELF;
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212 }
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213 }
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214 public void getLocation(AccessibleControlEvent e) {
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215 Rectangle location = getBounds();
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216 Point pt = toDisplay(new Point(location.x, location.y));
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217 e.x = pt.x;
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218 e.y = pt.y;
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219 e.width = location.width;
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220 e.height = location.height;
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221 }
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222 public void getSelection (AccessibleControlEvent e) {
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223 if (this.outer.getSelection())
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224 e.childID = ACC.CHILDID_SELF;
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225 }
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226
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227 public void getFocus (AccessibleControlEvent e) {
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228 if (this.outer.getSelection())
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229 e.childID = ACC.CHILDID_SELF;
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230 }
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231 public void getChildCount(AccessibleControlEvent e) {
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232 e.detail = 0;
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233 }
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234 public void getRole(AccessibleControlEvent e) {
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235 e.detail = ACC.ROLE_TREE;
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236 }
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237 public void getState(AccessibleControlEvent e) {
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238 int state = ACC.STATE_FOCUSABLE;
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239 if (this.outer.getSelection())
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240 state |= ACC.STATE_FOCUSED;
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241 state |= this.outer.isExpanded()
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242 ? ACC.STATE_EXPANDED
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243 : ACC.STATE_COLLAPSED;
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244 e.detail = state;
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245 }
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246 });
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247 }
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248 private void onKeyDown(Event e) {
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76
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249 if (e.keyCode is DWT.ARROW_RIGHT) {
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75
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250 // expand if collapsed
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251 if (!isExpanded()) {
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252 handleActivate(e);
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253 }
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254 e.doit=false;
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255 }
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256 else if (e.keyCode is DWT.ARROW_LEFT) {
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75
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257 // collapse if expanded
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258 if (isExpanded()) {
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259 handleActivate(e);
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260 }
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261 e.doit=false;
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262 }
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263 }
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264 }
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