Mercurial > projects > dwt-addons
annotate dwtx/jface/action/ExternalActionManager.d @ 40:da5ad8eedf5d
debug prints, dwt.dwthelper restructure, ...
author | Frank Benoit <benoit@tionex.de> |
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date | Thu, 10 Apr 2008 08:59:39 +0200 |
parents | 644f1334b451 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2006 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 |
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14 module dwtx.jface.action.ExternalActionManager; |
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15 |
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16 import dwtx.jface.action.IAction; |
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17 |
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18 import tango.util.collection.HashMap; |
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19 import tango.util.collection.HashSet; |
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20 import tango.util.collection.model.Map; |
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21 import tango.util.collection.model.Set; |
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22 |
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23 import dwtx.core.commands.Command; |
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24 import dwtx.core.commands.CommandEvent; |
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25 import dwtx.core.commands.CommandManager; |
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26 import dwtx.core.commands.ICommandListener; |
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27 import dwtx.core.commands.ParameterizedCommand; |
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28 import dwtx.core.runtime.IStatus; |
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29 import dwtx.core.runtime.Status; |
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30 import dwtx.jface.bindings.BindingManager; |
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31 import dwtx.jface.bindings.BindingManagerEvent; |
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32 import dwtx.jface.bindings.IBindingManagerListener; |
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33 import dwtx.jface.bindings.Trigger; |
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34 import dwtx.jface.bindings.TriggerSequence; |
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35 import dwtx.jface.bindings.keys.KeySequence; |
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36 import dwtx.jface.bindings.keys.KeyStroke; |
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37 import dwtx.jface.bindings.keys.SWTKeySupport; |
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38 import dwtx.jface.util.IPropertyChangeListener; |
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39 import dwtx.jface.util.Policy; |
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40 import dwtx.jface.util.PropertyChangeEvent; |
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41 import dwtx.jface.util.Util; |
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42 |
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43 import dwt.dwthelper.utils; |
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44 import dwt.dwthelper.ResourceBundle; |
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45 import tango.text.convert.Format; |
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46 |
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47 /** |
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48 * <p> |
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49 * A manager for a callback facility which is capable of querying external |
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50 * interfaces for additional information about actions and action contribution |
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51 * items. This information typically includes things like accelerators and |
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52 * textual representations. |
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53 * </p> |
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54 * <p> |
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55 * <em>It is only necessary to use this mechanism if you will be using a mix of |
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56 * actions and commands, and wish the interactions to work properly.</em> |
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57 * </p> |
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58 * <p> |
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59 * For example, in the Eclipse workbench, this mechanism is used to allow the |
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60 * command architecture to override certain values in action contribution items. |
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61 * </p> |
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62 * <p> |
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63 * This class is not intended to be called or extended by any external clients. |
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64 * </p> |
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65 * |
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66 * @since 3.0 |
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67 */ |
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68 public final class ExternalActionManager { |
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69 |
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70 /** |
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71 * A simple implementation of the <code>ICallback</code> mechanism that |
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72 * simply takes a <code>BindingManager</code> and a |
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73 * <code>CommandManager</code>. |
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74 * |
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75 * @since 3.1 |
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76 */ |
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77 public static final class CommandCallback : |
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78 IBindingManagerListener, IBindingManagerCallback { |
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79 |
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80 /** |
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81 * The internationalization bundle for text produced by this class. |
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82 */ |
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83 private static const ResourceBundle RESOURCE_BUNDLE; |
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84 |
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85 /** |
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86 * The callback capable of responding to whether a command is active. |
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87 */ |
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88 private const IActiveChecker activeChecker; |
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89 |
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90 /** |
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91 * The binding manager for your application. Must not be |
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92 * <code>null</code>. |
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93 */ |
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94 private const BindingManager bindingManager; |
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95 |
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96 /** |
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97 * Whether a listener has been attached to the binding manager yet. |
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98 */ |
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99 private bool bindingManagerListenerAttached = false; |
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100 |
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101 /** |
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102 * The command manager for your application. Must not be |
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103 * <code>null</code>. |
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104 */ |
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105 private const CommandManager commandManager; |
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106 |
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107 /** |
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108 * A set of all the command identifiers that have been logged as broken |
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109 * so far. For each of these, there will be a listener on the |
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110 * corresponding command. If the command ever becomes defined, the item |
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111 * will be removed from this set and the listener removed. This value |
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112 * may be empty, but never <code>null</code>. |
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113 */ |
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114 private const Set!(String) loggedCommandIds; |
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115 |
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116 /** |
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117 * The list of listeners that have registered for property change |
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118 * notification. This is a map of command identifiers (<code>String</code>) |
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119 * to listeners (<code>IPropertyChangeListener</code>). |
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120 */ |
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121 private const Map!(String,IPropertyChangeListener) registeredListeners; |
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122 |
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123 static this(){ |
39 | 124 RESOURCE_BUNDLE = ResourceBundle.getBundle( |
125 import("dwtx.jface.action.ExternalActionManager.properties")); | |
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126 } |
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127 /** |
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128 * Constructs a new instance of <code>CommandCallback</code> with the |
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129 * workbench it should be using. All commands will be considered active. |
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130 * |
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131 * @param bindingManager |
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132 * The binding manager which will provide the callback; must |
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133 * not be <code>null</code>. |
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134 * @param commandManager |
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135 * The command manager which will provide the callback; must |
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136 * not be <code>null</code>. |
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137 * |
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138 * @since 3.1 |
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139 */ |
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140 public this(BindingManager bindingManager, |
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141 CommandManager commandManager) { |
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142 this(bindingManager, commandManager, new class IActiveChecker { |
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143 public bool isActive(String commandId) { |
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144 return true; |
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145 } |
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146 |
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147 }); |
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148 } |
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149 |
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150 /** |
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151 * Constructs a new instance of <code>CommandCallback</code> with the |
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152 * workbench it should be using. |
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153 * |
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154 * @param bindingManager |
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155 * The binding manager which will provide the callback; must |
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156 * not be <code>null</code>. |
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157 * @param commandManager |
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158 * The command manager which will provide the callback; must |
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159 * not be <code>null</code>. |
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160 * @param activeChecker |
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161 * The callback mechanism for checking whether a command is |
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162 * active; must not be <code>null</code>. |
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163 * |
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164 * @since 3.1 |
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165 */ |
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166 public this(BindingManager bindingManager, |
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167 CommandManager commandManager, |
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168 IActiveChecker activeChecker) { |
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169 loggedCommandIds = new HashSet!(String); |
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170 registeredListeners = new HashMap!(String,IPropertyChangeListener); |
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171 if (bindingManager is null) { |
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172 throw new NullPointerException( |
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173 "The callback needs a binding manager"); //$NON-NLS-1$ |
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174 } |
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175 |
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176 if (commandManager is null) { |
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177 throw new NullPointerException( |
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178 "The callback needs a command manager"); //$NON-NLS-1$ |
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179 } |
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180 |
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181 if (activeChecker is null) { |
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182 throw new NullPointerException( |
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183 "The callback needs an active callback"); //$NON-NLS-1$ |
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184 } |
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185 |
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186 this.activeChecker = activeChecker; |
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187 this.bindingManager = bindingManager; |
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188 this.commandManager = commandManager; |
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189 } |
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190 |
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191 /** |
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192 * @see dwtx.jface.action.ExternalActionManager.ICallback#addPropertyChangeListener(String, |
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193 * IPropertyChangeListener) |
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194 */ |
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195 public final void addPropertyChangeListener(String commandId, |
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196 IPropertyChangeListener listener) { |
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197 registeredListeners.add(commandId, listener); |
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198 if (!bindingManagerListenerAttached) { |
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199 bindingManager.addBindingManagerListener(this); |
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200 bindingManagerListenerAttached = true; |
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201 } |
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202 } |
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203 |
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204 public final void bindingManagerChanged(BindingManagerEvent event) { |
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205 if (event.isActiveBindingsChanged()) { |
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206 foreach( k,v; registeredListeners ){ |
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207 // Iterator listenerItr = registeredListeners.entrySet() |
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208 // .iterator(); |
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209 // while (listenerItr.hasNext()) { |
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210 // Map.Entry entry = cast(Map.Entry) listenerItr.next(); |
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211 String commandId = k;//stringcast(k);// entry.getKey(); |
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212 Command command = commandManager.getCommand(commandId); |
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213 ParameterizedCommand parameterizedCommand = new ParameterizedCommand( |
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214 command, null); |
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215 if (event.isActiveBindingsChangedFor(parameterizedCommand)) { |
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216 IPropertyChangeListener listener = cast(IPropertyChangeListener) v; |
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217 listener.propertyChange(new PropertyChangeEvent(event |
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218 .getManager(), IAction.TEXT, null, null)); |
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219 } |
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220 } |
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221 } |
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222 } |
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223 |
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224 /** |
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225 * @see dwtx.jface.action.ExternalActionManager.ICallback#getAccelerator(String) |
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226 */ |
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227 public ValueWrapperInt getAccelerator(String commandId) { |
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228 TriggerSequence triggerSequence = bindingManager |
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229 .getBestActiveBindingFor(commandId); |
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230 if (triggerSequence !is null) { |
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231 Trigger[] triggers = triggerSequence.getTriggers(); |
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232 if (triggers.length is 1) { |
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233 Trigger trigger = triggers[0]; |
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234 if ( auto keyStroke = cast(KeyStroke) trigger ) { |
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235 int accelerator = SWTKeySupport |
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236 .convertKeyStrokeToAccelerator(keyStroke); |
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237 return new ValueWrapperInt(accelerator); |
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238 } |
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239 } |
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240 } |
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241 |
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242 return null; |
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243 } |
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244 |
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245 /** |
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246 * @see dwtx.jface.action.ExternalActionManager.ICallback#getAcceleratorText(String) |
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247 */ |
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248 public final String getAcceleratorText(String commandId) { |
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249 TriggerSequence triggerSequence = bindingManager |
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250 .getBestActiveBindingFor(commandId); |
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251 if (triggerSequence is null) { |
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252 return null; |
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253 } |
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254 |
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255 return triggerSequence.format(); |
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256 } |
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257 |
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258 /** |
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259 * Returns the active bindings for a particular command identifier. |
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260 * |
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261 * @param commandId |
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262 * The identifier of the command whose bindings are |
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263 * requested. This argument may be <code>null</code>. It |
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264 * is assumed that the command has no parameters. |
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265 * @return The array of active triggers (<code>TriggerSequence</code>) |
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266 * for a particular command identifier. This value is guaranteed |
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267 * not to be <code>null</code>, but it may be empty. |
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268 * @since 3.2 |
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269 */ |
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270 public final TriggerSequence[] getActiveBindingsFor( |
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271 String commandId) { |
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272 return bindingManager.getActiveBindingsFor(commandId); |
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273 } |
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274 |
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275 /** |
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276 * @see dwtx.jface.action.ExternalActionManager.ICallback#isAcceleratorInUse(int) |
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277 */ |
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278 public final bool isAcceleratorInUse(int accelerator) { |
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279 KeySequence keySequence = KeySequence |
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280 .getInstance(SWTKeySupport |
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281 .convertAcceleratorToKeyStroke(accelerator)); |
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282 return bindingManager.isPerfectMatch(keySequence) |
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283 || bindingManager.isPartialMatch(keySequence); |
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284 } |
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285 |
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286 /** |
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287 * {@inheritDoc} |
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288 * |
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289 * Calling this method with an undefined command id will generate a log |
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290 * message. |
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291 */ |
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292 public final bool isActive(String commandId) { |
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293 if (commandId !is null) { |
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294 Command command = commandManager.getCommand(commandId); |
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295 |
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296 if (!command.isDefined() |
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297 && (!loggedCommandIds.contains(commandId))) { |
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298 // The command is not yet defined, so we should log this. |
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299 String message = Format(Util |
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300 .translateString(RESOURCE_BUNDLE, |
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301 "undefinedCommand.WarningMessage", null), //$NON-NLS-1$ |
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302 [ command.getId() ]); |
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303 IStatus status = new Status(IStatus.ERROR, |
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304 "dwtx.jface", //$NON-NLS-1$ |
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305 0, message, new Exception(null)); |
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306 Policy.getLog().log(status); |
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307 |
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308 // And remember this item so we don't log it again. |
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309 loggedCommandIds.add(commandId); |
39 | 310 command.addCommandListener(new class(command,commandId) ICommandListener { |
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311 Command command_; |
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312 String commandId_; |
39 | 313 this(Command a,String b){ |
314 command_=a; | |
315 commandId_=b; | |
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316 } |
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317 /* |
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318 * (non-Javadoc) |
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319 * |
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320 * @see dwtx.ui.commands.ICommandListener#commandChanged(dwtx.ui.commands.CommandEvent) |
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321 */ |
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322 public final void commandChanged( |
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323 CommandEvent commandEvent) { |
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324 if (command_.isDefined()) { |
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325 command_.removeCommandListener(this); |
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326 loggedCommandIds.remove(commandId_); |
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327 } |
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328 } |
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329 }); |
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330 |
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331 return true; |
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332 } |
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333 |
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334 return activeChecker.isActive(commandId); |
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335 } |
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336 |
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337 return true; |
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338 } |
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339 |
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340 /** |
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341 * @see dwtx.jface.action.ExternalActionManager.ICallback#removePropertyChangeListener(String, |
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342 * IPropertyChangeListener) |
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343 */ |
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344 public final void removePropertyChangeListener(String commandId, |
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345 IPropertyChangeListener listener) { |
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346 IPropertyChangeListener existingListener = cast(IPropertyChangeListener) registeredListeners |
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347 .get(commandId); |
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348 if (existingListener is listener) { |
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349 registeredListeners.removeKey(commandId); |
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350 if (registeredListeners.drained()) { |
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351 bindingManager.removeBindingManagerListener(this); |
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352 bindingManagerListenerAttached = false; |
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353 } |
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354 } |
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355 } |
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356 } |
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357 |
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358 /** |
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359 * Defines a callback mechanism for developer who wish to further control |
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360 * the visibility of legacy action-based contribution items. |
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361 * |
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362 * @since 3.1 |
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363 */ |
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364 public interface IActiveChecker { |
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365 /** |
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366 * Checks whether the command with the given identifier should be |
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367 * considered active. This can be used in systems using some kind of |
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368 * user interface filtering (e.g., activities in the Eclipse workbench). |
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369 * |
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370 * @param commandId |
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371 * The identifier for the command; must not be |
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372 * <code>null</code> |
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373 * @return <code>true</code> if the command is active; |
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374 * <code>false</code> otherwise. |
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375 */ |
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376 public bool isActive(String commandId); |
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377 } |
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378 |
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379 /** |
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380 * <p> |
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381 * A callback which communicates with the applications binding manager. This |
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382 * interface provides more information from the binding manager, which |
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383 * allows greater integration. Implementing this interface is preferred over |
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384 * {@link ExternalActionManager.ICallback}. |
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385 * </p> |
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386 * <p> |
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387 * Clients may implement this interface, but must not extend. |
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388 * </p> |
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389 * |
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390 * @since 3.2 |
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391 */ |
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392 public interface IBindingManagerCallback : ICallback { |
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393 |
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394 /** |
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395 * <p> |
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396 * Returns the active bindings for a particular command identifier. |
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397 * </p> |
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398 * |
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399 * @param commandId |
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400 * The identifier of the command whose bindings are |
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401 * requested. This argument may be <code>null</code>. It |
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402 * is assumed that the command has no parameters. |
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403 * @return The array of active triggers (<code>TriggerSequence</code>) |
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404 * for a particular command identifier. This value is guaranteed |
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405 * not to be <code>null</code>, but it may be empty. |
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406 */ |
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407 public TriggerSequence[] getActiveBindingsFor(String commandId); |
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408 } |
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409 |
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410 /** |
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411 * A callback mechanism for some external tool to communicate extra |
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412 * information to actions and action contribution items. |
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413 * |
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414 * @since 3.0 |
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415 */ |
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416 public interface ICallback { |
16
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417 |
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418 /** |
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419 * <p> |
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420 * Adds a listener to the object referenced by <code>identifier</code>. |
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421 * This listener will be notified if a property of the item is to be |
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422 * changed. This identifier is specific to mechanism being used. In the |
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423 * case of the Eclipse workbench, this is the command identifier. |
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424 * </p> |
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425 * <p> |
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426 * A single instance of the listener may only ever be associated with |
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427 * one identifier. Attempts to add the listener twice (without a removal |
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428 * in between) has undefined behaviour. |
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429 * </p> |
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430 * |
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431 * @param identifier |
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432 * The identifier of the item to which the listener should be |
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433 * attached; must not be <code>null</code>. |
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434 * @param listener |
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435 * The listener to be added; must not be <code>null</code>. |
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436 */ |
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437 public void addPropertyChangeListener(String identifier, |
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438 IPropertyChangeListener listener); |
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439 |
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440 /** |
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441 * An accessor for the accelerator associated with the item indicated by |
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442 * the identifier. This identifier is specific to mechanism being used. |
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443 * In the case of the Eclipse workbench, this is the command identifier. |
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444 * |
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445 * @param identifier |
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446 * The identifier of the item from which the accelerator |
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447 * should be obtained ; must not be <code>null</code>. |
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448 * @return An integer representation of the accelerator. This is the |
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449 * same accelerator format used by DWT. |
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450 */ |
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451 public Integer getAccelerator(String identifier); |
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452 |
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453 /** |
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454 * An accessor for the accelerator text associated with the item |
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455 * indicated by the identifier. This identifier is specific to mechanism |
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456 * being used. In the case of the Eclipse workbench, this is the command |
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457 * identifier. |
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458 * |
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459 * @param identifier |
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460 * The identifier of the item from which the accelerator text |
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461 * should be obtained ; must not be <code>null</code>. |
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462 * @return A string representation of the accelerator. This is the |
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463 * string representation that should be displayed to the user. |
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464 */ |
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465 public String getAcceleratorText(String identifier); |
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466 |
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467 /** |
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468 * Checks to see whether the given accelerator is being used by some |
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469 * other mechanism (outside of the menus controlled by JFace). This is |
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470 * used to keep JFace from trying to grab accelerators away from someone |
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471 * else. |
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472 * |
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473 * @param accelerator |
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474 * The accelerator to check -- in DWT's internal accelerator |
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475 * format. |
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476 * @return <code>true</code> if the accelerator is already being used |
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477 * and shouldn't be used again; <code>false</code> otherwise. |
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478 */ |
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479 public bool isAcceleratorInUse(int accelerator); |
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480 |
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481 /** |
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482 * Checks whether the item matching this identifier is active. This is |
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483 * used to decide whether a contribution item with this identifier |
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484 * should be made visible. An inactive item is not visible. |
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485 * |
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486 * @param identifier |
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487 * The identifier of the item from which the active state |
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488 * should be retrieved; must not be <code>null</code>. |
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489 * @return <code>true</code> if the item is active; <code>false</code> |
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490 * otherwise. |
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491 */ |
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492 public bool isActive(String identifier); |
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493 |
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494 /** |
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495 * Removes a listener from the object referenced by |
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496 * <code>identifier</code>. This identifier is specific to mechanism |
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497 * being used. In the case of the Eclipse workbench, this is the command |
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498 * identifier. |
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499 * |
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500 * @param identifier |
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501 * The identifier of the item to from the listener should be |
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502 * removed; must not be <code>null</code>. |
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503 * @param listener |
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504 * The listener to be removed; must not be <code>null</code>. |
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505 */ |
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506 public void removePropertyChangeListener(String identifier, |
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507 IPropertyChangeListener listener); |
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508 } |
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509 |
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510 /** |
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511 * The singleton instance of this class. This value may be <code>null</code>-- |
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512 * if it has not yet been initialized. |
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513 */ |
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514 private static ExternalActionManager instance; |
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515 |
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516 /** |
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517 * Retrieves the current singleton instance of this class. |
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518 * |
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519 * @return The singleton instance; this value is never <code>null</code>. |
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520 */ |
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521 public static ExternalActionManager getInstance() { |
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522 if (instance is null) { |
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523 instance = new ExternalActionManager(); |
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524 } |
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525 |
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526 return instance; |
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527 } |
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528 |
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529 /** |
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530 * The callback mechanism to use to retrieve extra information. |
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531 */ |
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532 private ICallback callback; |
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533 |
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534 /** |
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535 * Constructs a new instance of <code>ExternalActionManager</code>. |
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536 */ |
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537 private this() { |
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538 // This is a singleton class. Only this class should create an instance. |
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539 } |
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540 |
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541 /** |
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542 * An accessor for the current call back. |
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543 * |
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544 * @return The current callback mechanism being used. This is the callback |
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545 * that should be queried for extra information about actions and |
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546 * action contribution items. This value may be <code>null</code> |
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547 * if there is no extra information. |
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548 */ |
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549 public ICallback getCallback() { |
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550 return callback; |
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551 } |
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|
552 |
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553 /** |
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554 * A mutator for the current call back |
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PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
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changeset
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555 * |
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PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
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changeset
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556 * @param callbackToUse |
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PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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557 * The new callback mechanism to use; this value may be |
e0f0aaf75edd
PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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558 * <code>null</code> if the default is acceptable (i.e., no |
e0f0aaf75edd
PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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559 * extra information will provided to actions). |
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PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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560 */ |
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PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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561 public void setCallback(ICallback callbackToUse) { |
e0f0aaf75edd
PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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562 callback = callbackToUse; |
e0f0aaf75edd
PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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563 } |
e0f0aaf75edd
PopupDialog, bindings and actions
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
564 } |