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org.apache.commons.jelly.tags.swing.WindowListenerTag |
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1 | /* |
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2 | * Copyright 2002,2004 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.jelly.tags.swing; |
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17 | ||
18 | import java.awt.event.WindowEvent; |
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19 | import java.awt.event.WindowListener; |
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20 | ||
21 | import org.apache.commons.jelly.JellyTagException; |
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22 | import org.apache.commons.jelly.Script; |
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23 | import org.apache.commons.jelly.TagSupport; |
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24 | import org.apache.commons.jelly.XMLOutput; |
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25 | import org.apache.commons.logging.Log; |
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26 | import org.apache.commons.logging.LogFactory; |
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27 | ||
28 | /** |
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29 | * Creates a WindowListener which is attached to its parent window control which will invoke |
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30 | * named Jelly scripts as window events are fired, or will invoke its body if there is no script |
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31 | * specified for the named event type. |
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32 | * |
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33 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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34 | * @version $Revision: 155420 $ |
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35 | */ |
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36 | 0 | public class WindowListenerTag extends TagSupport { |
37 | ||
38 | /** The Log to which logging calls will be made. */ |
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39 | 8 | private static final Log log = LogFactory.getLog(WindowListenerTag.class); |
40 | ||
41 | private String var; |
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42 | private Script activated; |
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43 | private Script closed; |
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44 | private Script closing; |
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45 | private Script deactivated; |
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46 | private Script deiconified; |
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47 | private Script iconified; |
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48 | private Script opened; |
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49 | ||
50 | 0 | public WindowListenerTag() { |
51 | 0 | } |
52 | ||
53 | // Tag interface |
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54 | //------------------------------------------------------------------------- |
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55 | public void doTag(final XMLOutput output) throws JellyTagException { |
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56 | ||
57 | // now lets add this action to its parent if we have one |
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58 | 0 | ComponentTag tag = (ComponentTag) findAncestorWithClass( ComponentTag.class ); |
59 | 0 | if ( tag != null ) { |
60 | 0 | WindowListener listener = new WindowListener() { |
61 | public void windowActivated(WindowEvent e) { |
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62 | invokeScript( output, e, activated ); |
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63 | } |
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64 | ||
65 | public void windowClosed(WindowEvent e) { |
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66 | invokeScript( output, e, closed ); |
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67 | } |
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68 | ||
69 | public void windowClosing(WindowEvent e) { |
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70 | invokeScript( output, e, closing ); |
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71 | } |
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72 | ||
73 | public void windowDeactivated(WindowEvent e) { |
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74 | invokeScript( output, e, deactivated ); |
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75 | } |
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76 | ||
77 | public void windowDeiconified(WindowEvent e) { |
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78 | invokeScript( output, e, deiconified ); |
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79 | } |
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80 | ||
81 | public void windowIconified(WindowEvent e) { |
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82 | invokeScript( output, e, iconified ); |
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83 | } |
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84 | ||
85 | public void windowOpened(WindowEvent e) { |
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86 | invokeScript( output, e, opened ); |
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87 | } |
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88 | }; |
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89 | 0 | tag.addWindowListener(listener); |
90 | } |
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91 | 0 | } |
92 | ||
93 | // Properties |
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94 | //------------------------------------------------------------------------- |
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95 | ||
96 | ||
97 | /** |
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98 | * Sets the name of the variable to use to expose the Event object |
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99 | */ |
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100 | public void setVar(String var) { |
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101 | 0 | this.var = class="keyword">var; |
102 | 0 | } |
103 | ||
104 | /** |
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105 | * Sets the Script to be executed when the window is activated. |
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106 | */ |
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107 | public void setActivated(Script activated) { |
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108 | 0 | this.activated = activated; |
109 | 0 | } |
110 | ||
111 | /** |
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112 | * Sets the Script to be executed when the window is closed. |
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113 | */ |
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114 | public void setClosed(Script closed) { |
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115 | 0 | this.closed = closed; |
116 | 0 | } |
117 | ||
118 | /** |
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119 | * Sets the Script to be executed when the window is closing. |
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120 | */ |
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121 | public void setClosing(Script closing) { |
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122 | 0 | this.closing = closing; |
123 | 0 | } |
124 | ||
125 | /** |
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126 | * Sets the Script to be executed when the window is deactivated. |
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127 | */ |
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128 | public void setDeactivated(Script deactivated) { |
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129 | 0 | this.deactivated = deactivated; |
130 | 0 | } |
131 | ||
132 | /** |
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133 | * Sets the Script to be executed when the window is deiconified. |
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134 | */ |
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135 | public void setDeiconified(Script deiconified) { |
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136 | 0 | this.deiconified = deiconified; |
137 | 0 | } |
138 | ||
139 | /** |
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140 | * Sets the Script to be executed when the window is iconified. |
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141 | */ |
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142 | public void setIconified(Script iconified) { |
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143 | 0 | this.iconified = iconified; |
144 | 0 | } |
145 | ||
146 | /** |
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147 | * Sets the Script to be executed when the window is opened. |
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148 | */ |
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149 | public void setOpened(Script opened) { |
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150 | 0 | this.opened = opened; |
151 | 0 | } |
152 | ||
153 | ||
154 | ||
155 | // Implementation methods |
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156 | //------------------------------------------------------------------------- |
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157 | protected void invokeScript(XMLOutput output, WindowEvent event, Script script) { |
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158 | 0 | if ( var != null ) { |
159 | // define a variable of the event |
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160 | 0 | context.setVariable(var, event); |
161 | } |
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162 | ||
163 | try { |
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164 | 0 | if ( script != null ) { |
165 | 0 | script.run(context, output ); |
166 | } |
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167 | else { |
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168 | // invoke the body |
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169 | 0 | invokeBody(output); |
170 | } |
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171 | } |
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172 | 0 | catch (Exception e) { |
173 | 0 | log.error( "Caught exception processing window event: " + event, e ); |
174 | 0 | } |
175 | 0 | } |
176 | ||
177 | } |
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