1 | <div class="body-wrap"> |
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2 | <div class="top-tools"> |
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3 | <a class="inner-link" href="#Ext.util.Observable-props"><img src="../resources/images/default/s.gif" class="item-icon icon-prop">Properties</a> |
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4 | <a class="inner-link" href="#Ext.util.Observable-methods"><img src="../resources/images/default/s.gif" class="item-icon icon-method">Methods</a> |
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5 | <a class="inner-link" href="#Ext.util.Observable-events"><img src="../resources/images/default/s.gif" class="item-icon icon-event">Events</a> |
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6 | <a class="inner-link" href="#Ext.util.Observable-configs"><img src="../resources/images/default/s.gif" class="item-icon icon-config">Config Options</a> |
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7 | <a class="bookmark" href="../docs/?class=Ext.util.Observable"><img src="../resources/images/default/s.gif" class="item-icon icon-fav">Direct Link</a> |
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8 | </div> |
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9 | <h1>Class Ext.util.Observable</h1> |
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10 | <table cellspacing="0"> |
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11 | <tr><td class="label">Package:</td><td class="hd-info">Ext.util</td></tr> |
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12 | <tr><td class="label">Defined In:</td><td class="hd-info"><a href="../src/Observable.js" target="_blank">Observable.js</a></td></tr> |
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13 | <tr><td class="label">Class:</td><td class="hd-info">Observable</td></tr> |
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14 | <tr><td class="label">Subclasses:</td><td class="hd-info"><a ext:cls="Ext.Component" href="output/Ext.Component.html">Component</a>, <a ext:cls="Ext.History" href="output/Ext.History.html">History</a>, <a ext:cls="Ext.Resizable" href="output/Ext.Resizable.html">Resizable</a>, <a ext:cls="Ext.SplitBar" href="output/Ext.SplitBar.html">SplitBar</a>, <a ext:cls="Ext.Updater" href="output/Ext.Updater.html">Updater</a>, <a ext:cls="Ext.air.NativeObservable" href="output/Ext.air.NativeObservable.html">NativeObservable</a>, <a ext:cls="Ext.data.Connection" href="output/Ext.data.Connection.html">Connection</a>, <a ext:cls="Ext.data.DataProxy" href="output/Ext.data.DataProxy.html">DataProxy</a>, <a ext:cls="Ext.data.Node" href="output/Ext.data.Node.html">Node</a>, <a ext:cls="Ext.data.Store" href="output/Ext.data.Store.html">Store</a>, <a ext:cls="Ext.data.Tree" href="output/Ext.data.Tree.html">Tree</a>, <a ext:cls="Ext.form.BasicForm" href="output/Ext.form.BasicForm.html">BasicForm</a>, <a ext:cls="Ext.grid.AbstractSelectionModel" href="output/Ext.grid.AbstractSelectionModel.html">AbstractSelectionModel</a>, <a ext:cls="Ext.grid.ColumnModel" href="output/Ext.grid.ColumnModel.html">ColumnModel</a>, <a ext:cls="Ext.grid.GridView" href="output/Ext.grid.GridView.html">GridView</a>, <a ext:cls="Ext.grid.PropertyStore" href="output/Ext.grid.PropertyStore.html">PropertyStore</a>, <a ext:cls="Ext.menu.Menu" href="output/Ext.menu.Menu.html">Menu</a>, <a ext:cls="Ext.tree.DefaultSelectionModel" href="output/Ext.tree.DefaultSelectionModel.html">DefaultSelectionModel</a>, <a ext:cls="Ext.tree.MultiSelectionModel" href="output/Ext.tree.MultiSelectionModel.html">MultiSelectionModel</a>, <a ext:cls="Ext.tree.TreeLoader" href="output/Ext.tree.TreeLoader.html">TreeLoader</a>, <a ext:cls="Ext.util.ClickRepeater" href="output/Ext.util.ClickRepeater.html">ClickRepeater</a>, <a ext:cls="Ext.util.MixedCollection" href="output/Ext.util.MixedCollection.html">MixedCollection</a></td></tr> |
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15 | <tr><td class="label">Extends:</td><td class="hd-info">Object</td></tr> |
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16 | </table> |
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17 | <div class="description"> |
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18 | * |
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19 | Abstract base class that provides a common interface for publishing events. Subclasses are expected to |
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20 | to have a property "events" with all the events defined.<br> |
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21 | For example: |
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22 | <pre><code>Employee = <b>function</b>(name){ |
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23 | <b>this</b>.name = name; |
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24 | <b>this</b>.addEvents({ |
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25 | <em>"fired"</em> : true, |
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26 | <em>"quit"</em> : true |
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27 | }); |
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28 | } |
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29 | Ext.extend(Employee, Ext.util.Observable);</code></pre> </div> |
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30 | |
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31 | <div class="hr"></div> |
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32 | <a id="Ext.util.Observable-configs"></a> |
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33 | <h2>Config Options</h2> |
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34 | <table cellspacing="0" class="member-table"> |
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35 | <tr> |
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36 | <th class="sig-header" colspan="2">Config Options</th> |
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37 | <th class="msource-header">Defined By</th> |
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38 | </tr> |
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39 | <tr class="config-row expandable"> |
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40 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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41 | <td class="sig"> |
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42 | <a id="Ext.util.Observable-listeners"></a> |
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43 | <b>listeners</b> : Object <div class="mdesc"> |
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44 | <div class="short">(optional) A config object containing one or more event handlers to be added to this object during initialization. Th...</div> |
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45 | <div class="long"> |
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46 | (optional) A config object containing one or more event handlers to be added to this object during initialization. This should be a valid listeners config object as specified in the <a ext:cls="Ext.util.Observable" ext:member="addListener" href="output/Ext.util.Observable.html#addListener">addListener</a> example for attaching multiple handlers at once. </div> |
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47 | </div> |
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48 | </td> |
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49 | <td class="msource">Observable</td> |
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50 | </tr> |
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51 | </table> |
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52 | <a id="Ext.util.Observable-props"></a> |
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53 | <h2>Public Properties</h2> |
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54 | <div class="no-members">This class has no public properties.</div> <a id="Ext.util.Observable-methods"></a> |
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55 | <h2>Public Methods</h2> |
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56 | <table cellspacing="0" class="member-table"> |
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57 | <tr> |
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58 | <th class="sig-header" colspan="2">Method</th> |
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59 | <th class="msource-header">Defined By</th> |
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60 | </tr> |
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61 | <tr class="method-row expandable"> |
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62 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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63 | <td class="sig"> |
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64 | <a id="Ext.util.Observable-Observable.capture"></a> |
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65 | <b>Observable.capture</b>( <code>Observable o</code>, <code>Function fn</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span> ) : void <div class="mdesc"> |
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66 | <div class="short"><static> Starts capture on the specified Observable. All events will be passed |
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67 | to the supplied function with th...</div> |
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68 | <div class="long"> |
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69 | <static> Starts capture on the specified Observable. All events will be passed |
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70 | to the supplied function with the event name + standard signature of the event |
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71 | <b>before</b> the event is fired. If the supplied function returns false, |
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72 | the event will not fire. <div class="mdetail-params"> |
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73 | <strong>Parameters:</strong> |
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74 | <ul><li><code>o</code> : Observable<div class="sub-desc">The Observable to capture</div></li><li><code>fn</code> : Function<div class="sub-desc">The function to call</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the fn</div></li> </ul> |
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75 | <strong>Returns:</strong> |
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76 | <ul> |
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77 | <li><code>void</code></li> |
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78 | </ul> |
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79 | </div> |
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80 | </div> |
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81 | </div> |
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82 | </td> |
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83 | <td class="msource">Observable</td> |
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84 | </tr> |
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85 | <tr class="method-row alt expandable"> |
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86 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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87 | <td class="sig"> |
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88 | <a id="Ext.util.Observable-Observable.releaseCapture"></a> |
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89 | <b>Observable.releaseCapture</b>( <code>Observable o</code> ) : void <div class="mdesc"> |
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90 | <div class="short"><static> Removes <b>all</b> added captures from the Observable.</div> |
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91 | <div class="long"> |
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92 | <static> Removes <b>all</b> added captures from the Observable. <div class="mdetail-params"> |
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93 | <strong>Parameters:</strong> |
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94 | <ul><li><code>o</code> : Observable<div class="sub-desc">The Observable to release</div></li> </ul> |
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95 | <strong>Returns:</strong> |
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96 | <ul> |
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97 | <li><code>void</code></li> |
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98 | </ul> |
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99 | </div> |
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100 | </div> |
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101 | </div> |
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102 | </td> |
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103 | <td class="msource">Observable</td> |
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104 | </tr> |
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105 | <tr class="method-row expandable"> |
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106 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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107 | <td class="sig"> |
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108 | <a id="Ext.util.Observable-addEvents"></a> |
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109 | <b>addEvents</b>( <code>Object object</code> ) : void <div class="mdesc"> |
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110 | <div class="short">Used to define events on this Observable</div> |
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111 | <div class="long"> |
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112 | Used to define events on this Observable <div class="mdetail-params"> |
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113 | <strong>Parameters:</strong> |
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114 | <ul><li><code>object</code> : Object<div class="sub-desc">The object with the events defined</div></li> </ul> |
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115 | <strong>Returns:</strong> |
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116 | <ul> |
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117 | <li><code>void</code></li> |
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118 | </ul> |
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119 | </div> |
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120 | </div> |
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121 | </div> |
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122 | </td> |
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123 | <td class="msource">Observable</td> |
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124 | </tr> |
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125 | <tr class="method-row alt expandable"> |
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126 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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127 | <td class="sig"> |
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128 | <a id="Ext.util.Observable-addListener"></a> |
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129 | <b>addListener</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>, <span class="optional" title="Optional">[<code>Object options</code>]</span> ) : void <div class="mdesc"> |
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130 | <div class="short">Appends an event handler to this component</div> |
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131 | <div class="long"> |
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132 | Appends an event handler to this component <div class="mdetail-params"> |
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133 | <strong>Parameters:</strong> |
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134 | <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope in which to execute the handler |
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135 | function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration |
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136 | properties. This may contain any of the following properties:<ul> |
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137 | <li><b>scope</b> : Object<p class="sub-desc">The scope in which to execute the handler function. The handler function's "this" context.</p></li> |
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138 | <li><b>delay</b> : Number<p class="sub-desc">The number of milliseconds to delay the invocation of the handler after the event fires.</p></li> |
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139 | <li><b>single</b> : Boolean<p class="sub-desc">True to add a handler to handle just the next firing of the event, and then remove itself.</p></li> |
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140 | <li><b>buffer</b> : Number<p class="sub-desc">Causes the handler to be scheduled to run in an <a ext:cls="Ext.util.DelayedTask" href="output/Ext.util.DelayedTask.html">Ext.util.DelayedTask</a> delayed |
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141 | by the specified number of milliseconds. If the event fires again within that time, the original |
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142 | handler is <em>not</em> invoked, but the new handler is scheduled in its place.</p></li> |
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143 | </ul><br> |
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144 | <p> |
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145 | <b>Combining Options</b><br> |
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146 | Using the options argument, it is possible to combine different types of listeners:<br> |
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147 | <br> |
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148 | A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId) |
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149 | <pre><code>el.on(<em>'click'</em>, <b>this</b>.onClick, <b>this</b>, { |
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150 | single: true, |
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151 | delay: 100, |
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152 | forumId: 4 |
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153 | });</code></pre> |
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154 | <p> |
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155 | <b>Attaching multiple handlers in 1 call</b><br> |
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156 | The method also allows for a single argument to be passed which is a config object containing properties |
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157 | which specify multiple handlers. |
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158 | <p> |
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159 | <pre><code>foo.on({ |
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160 | <em>'click'</em> : { |
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161 | fn: <b>this</b>.onClick, |
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162 | scope: <b>this</b>, |
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163 | delay: 100 |
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164 | }, |
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165 | <em>'mouseover'</em> : { |
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166 | fn: <b>this</b>.onMouseOver, |
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167 | scope: <b>this</b> |
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168 | }, |
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169 | <em>'mouseout'</em> : { |
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170 | fn: <b>this</b>.onMouseOut, |
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171 | scope: <b>this</b> |
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172 | } |
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173 | });</code></pre> |
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174 | <p> |
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175 | Or a shorthand syntax:<br> |
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176 | <pre><code>foo.on({ |
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177 | <em>'click'</em> : <b>this</b>.onClick, |
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178 | <em>'mouseover'</em> : <b>this</b>.onMouseOver, |
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179 | <em>'mouseout'</em> : <b>this</b>.onMouseOut, |
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180 | scope: <b>this</b> |
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181 | });</code></pre></div></li> </ul> |
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182 | <strong>Returns:</strong> |
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183 | <ul> |
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184 | <li><code>void</code></li> |
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185 | </ul> |
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186 | </div> |
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187 | </div> |
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188 | </div> |
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189 | </td> |
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190 | <td class="msource">Observable</td> |
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191 | </tr> |
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192 | <tr class="method-row expandable"> |
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193 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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194 | <td class="sig"> |
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195 | <a id="Ext.util.Observable-fireEvent"></a> |
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196 | <b>fireEvent</b>( <code>String eventName</code>, <code>Object... args</code> ) : Boolean <div class="mdesc"> |
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197 | <div class="short">Fires the specified event with the passed parameters (minus the event name).</div> |
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198 | <div class="long"> |
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199 | Fires the specified event with the passed parameters (minus the event name). <div class="mdetail-params"> |
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200 | <strong>Parameters:</strong> |
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201 | <ul><li><code>eventName</code> : String<div class="sub-desc"></div></li><li><code>args</code> : Object...<div class="sub-desc">Variable number of parameters are passed to handlers</div></li> </ul> |
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202 | <strong>Returns:</strong> |
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203 | <ul> |
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204 | <li><code>Boolean</code><div class="sub-desc">returns false if any of the handlers return false otherwise it returns true</div></li> |
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205 | </ul> |
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206 | </div> |
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207 | </div> |
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208 | </div> |
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209 | </td> |
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210 | <td class="msource">Observable</td> |
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211 | </tr> |
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212 | <tr class="method-row alt expandable"> |
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213 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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214 | <td class="sig"> |
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215 | <a id="Ext.util.Observable-hasListener"></a> |
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216 | <b>hasListener</b>( <code>String eventName</code> ) : Boolean <div class="mdesc"> |
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217 | <div class="short">Checks to see if this object has any listeners for a specified event</div> |
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218 | <div class="long"> |
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219 | Checks to see if this object has any listeners for a specified event <div class="mdetail-params"> |
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220 | <strong>Parameters:</strong> |
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221 | <ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to check for</div></li> </ul> |
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222 | <strong>Returns:</strong> |
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223 | <ul> |
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224 | <li><code>Boolean</code><div class="sub-desc">True if the event is being listened for, else false</div></li> |
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225 | </ul> |
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226 | </div> |
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227 | </div> |
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228 | </div> |
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229 | </td> |
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230 | <td class="msource">Observable</td> |
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231 | </tr> |
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232 | <tr class="method-row expandable"> |
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233 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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234 | <td class="sig"> |
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235 | <a id="Ext.util.Observable-on"></a> |
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236 | <b>on</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>, <span class="optional" title="Optional">[<code>Object options</code>]</span> ) : void <div class="mdesc"> |
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237 | <div class="short">Appends an event handler to this element (shorthand for addListener)</div> |
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238 | <div class="long"> |
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239 | Appends an event handler to this element (shorthand for addListener) <div class="mdetail-params"> |
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240 | <strong>Parameters:</strong> |
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241 | <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope in which to execute the handler |
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242 | function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional)</div></li> </ul> |
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243 | <strong>Returns:</strong> |
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244 | <ul> |
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245 | <li><code>void</code></li> |
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246 | </ul> |
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247 | </div> |
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248 | </div> |
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249 | </div> |
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250 | </td> |
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251 | <td class="msource">Observable</td> |
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252 | </tr> |
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253 | <tr class="method-row alt expandable"> |
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254 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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255 | <td class="sig"> |
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256 | <a id="Ext.util.Observable-purgeListeners"></a> |
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257 | <b>purgeListeners</b>() : void <div class="mdesc"> |
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258 | <div class="short">Removes all listeners for this object</div> |
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259 | <div class="long"> |
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260 | Removes all listeners for this object <div class="mdetail-params"> |
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261 | <strong>Parameters:</strong> |
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262 | <ul><li>None.</li> </ul> |
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263 | <strong>Returns:</strong> |
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264 | <ul> |
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265 | <li><code>void</code></li> |
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266 | </ul> |
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267 | </div> |
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268 | </div> |
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269 | </div> |
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270 | </td> |
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271 | <td class="msource">Observable</td> |
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272 | </tr> |
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273 | <tr class="method-row expandable"> |
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274 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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275 | <td class="sig"> |
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276 | <a id="Ext.util.Observable-relayEvents"></a> |
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277 | <b>relayEvents</b>( <code>Object o</code>, <code>Array events</code> ) : void <div class="mdesc"> |
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278 | <div class="short">Relays selected events from the specified Observable as if the events were fired by <tt><b>this</b></tt>.</div> |
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279 | <div class="long"> |
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280 | Relays selected events from the specified Observable as if the events were fired by <tt><b>this</b></tt>. <div class="mdetail-params"> |
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281 | <strong>Parameters:</strong> |
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282 | <ul><li><code>o</code> : Object<div class="sub-desc">The Observable whose events this object is to relay.</div></li><li><code>events</code> : Array<div class="sub-desc">Array of event names to relay.</div></li> </ul> |
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283 | <strong>Returns:</strong> |
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284 | <ul> |
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285 | <li><code>void</code></li> |
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286 | </ul> |
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287 | </div> |
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288 | </div> |
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289 | </div> |
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290 | </td> |
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291 | <td class="msource">Observable</td> |
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292 | </tr> |
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293 | <tr class="method-row alt expandable"> |
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294 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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295 | <td class="sig"> |
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296 | <a id="Ext.util.Observable-removeListener"></a> |
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297 | <b>removeListener</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span> ) : void <div class="mdesc"> |
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298 | <div class="short">Removes a listener</div> |
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299 | <div class="long"> |
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300 | Removes a listener <div class="mdetail-params"> |
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301 | <strong>Parameters:</strong> |
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302 | <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the handler</div></li> </ul> |
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303 | <strong>Returns:</strong> |
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304 | <ul> |
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305 | <li><code>void</code></li> |
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306 | </ul> |
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307 | </div> |
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308 | </div> |
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309 | </div> |
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310 | </td> |
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311 | <td class="msource">Observable</td> |
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312 | </tr> |
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313 | <tr class="method-row expandable"> |
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314 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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315 | <td class="sig"> |
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316 | <a id="Ext.util.Observable-resumeEvents"></a> |
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317 | <b>resumeEvents</b>() : void <div class="mdesc"> |
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318 | <div class="short">Resume firing events. (see <a ext:cls="Ext.util.Observable" ext:member="suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">suspendEvents</a>)</div> |
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319 | <div class="long"> |
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320 | Resume firing events. (see <a ext:cls="Ext.util.Observable" ext:member="suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">suspendEvents</a>) <div class="mdetail-params"> |
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321 | <strong>Parameters:</strong> |
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322 | <ul><li>None.</li> </ul> |
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323 | <strong>Returns:</strong> |
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324 | <ul> |
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325 | <li><code>void</code></li> |
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326 | </ul> |
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327 | </div> |
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328 | </div> |
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329 | </div> |
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330 | </td> |
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331 | <td class="msource">Observable</td> |
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332 | </tr> |
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333 | <tr class="method-row alt expandable"> |
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334 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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335 | <td class="sig"> |
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336 | <a id="Ext.util.Observable-suspendEvents"></a> |
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337 | <b>suspendEvents</b>() : void <div class="mdesc"> |
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338 | <div class="short">Suspend the firing of all events. (see <a ext:cls="Ext.util.Observable" ext:member="resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">resumeEvents</a>)</div> |
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339 | <div class="long"> |
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340 | Suspend the firing of all events. (see <a ext:cls="Ext.util.Observable" ext:member="resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">resumeEvents</a>) <div class="mdetail-params"> |
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341 | <strong>Parameters:</strong> |
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342 | <ul><li>None.</li> </ul> |
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343 | <strong>Returns:</strong> |
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344 | <ul> |
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345 | <li><code>void</code></li> |
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346 | </ul> |
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347 | </div> |
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348 | </div> |
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349 | </div> |
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350 | </td> |
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351 | <td class="msource">Observable</td> |
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352 | </tr> |
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353 | <tr class="method-row expandable"> |
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354 | <td class="micon"><a class="exi" href="#expand"> </a></td> |
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355 | <td class="sig"> |
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356 | <a id="Ext.util.Observable-un"></a> |
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357 | <b>un</b>( <code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span> ) : void <div class="mdesc"> |
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358 | <div class="short">Removes a listener (shorthand for removeListener)</div> |
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359 | <div class="long"> |
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360 | Removes a listener (shorthand for removeListener) <div class="mdetail-params"> |
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361 | <strong>Parameters:</strong> |
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362 | <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the handler</div></li> </ul> |
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363 | <strong>Returns:</strong> |
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364 | <ul> |
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365 | <li><code>void</code></li> |
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366 | </ul> |
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367 | </div> |
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368 | </div> |
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369 | </div> |
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370 | </td> |
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371 | <td class="msource">Observable</td> |
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372 | </tr> |
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373 | </table> |
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374 | <a id="Ext.util.Observable-events"></a> |
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375 | <h2>Public Events</h2> |
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376 | <div class="no-members">This class has no public events.</div> |
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377 | </div> |
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