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99 lines
No EOL
4.5 KiB
HTML
99 lines
No EOL
4.5 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
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<div class="ui-page">
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<div class="ui-header">
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<h1>.dblclick()</h1>
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</div>
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<div class="ui-content ui-body ui-body-c" id="dblclick1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.dblclick( handler(eventObject) )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>
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</h2>
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<div class=" entry-details">
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<p class="desc"><strong>Description: </strong>Bind an event handler to the "dblclick" JavaScript event, or trigger that event on an element.</p>
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<ul class="signatures">
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<li class="signature" id="dblclick-handlereventObject">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.dblclick( handler(eventObject) )</h4>
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<p class="arguement"><strong>handler(eventObject)</strong>A function to execute each time the event is triggered.</p>
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</li>
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<li class="signature" id="dblclick"><h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.dblclick()</h4></li>
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</ul>
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<div class="longdesc">
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<p>This method is a shortcut for <code>.bind('dblclick', handler)</code> in the first variation, and <code>.trigger('dblclick')</code> in the second.
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The <code>dblclick</code> event is sent to an element when the element is double-clicked. Any HTML element can receive this event.
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For example, consider the HTML:</p>
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<pre><div id="target">
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Double-click here
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</div>
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<div id="other">
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Trigger the handler
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</div></pre>
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<p class="image"><img src="http://api.jquery.com/images/0042_05_04.png" alt=""></p>
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<p>The event handler can be bound to any <code><div></code>:</p>
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<pre>$('#target').dblclick(function() {
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alert('Handler for .dblclick() called.');
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});</pre>
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<p>Now if we double-click on this element, the alert is displayed:</p>
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<p><span class="output">Handler for .dblclick() called.</span></p>
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<p>We can also trigger the event when a different element is clicked:</p>
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<pre>$('#other').click(function() {
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$('#target').dblclick();
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});</pre>
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<p>After this code executes, (single) clicks on <span class="output">Trigger the handler</span> will also alert the message.</p>
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<p>The <code>dblclick</code> event is only triggered after this exact series of events:</p>
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<ul>
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<li>The mouse button is depressed while the pointer is inside the element.</li>
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<li>The mouse button is released while the pointer is inside the element.</li>
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<li>The mouse button is depressed again while the pointer is inside the element, within a time window that is system-dependent.</li>
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<li>The mouse button is released while the pointer is inside the element.</li>
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</ul>
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<p>It is inadvisable to bind handlers to both the <code>click</code> and <code>dblclick</code> events for the same element. The sequence of events triggered varies from browser to browser, with some receiving two <code>click</code> events and others only one. If an interface that reacts differently to single- and double-clicks cannot be avoided, then the <code>dblclick</code> event should be simulated within the <code>click</code> handler. We can achieve this by saving a timestamp in the handler, and then comparing the current time to the saved timestamp on subsequent clicks. If the difference is small enough, we can treat the click as a double-click.
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</p>
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</div>
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<h3>Examples:</h3>
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<div id="entry-examples" class="entry-examples">
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<div id="example-0">
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<h4>Example: <span class="desc">To bind a "Hello World!" alert box the dblclick event on every paragraph on the page:</span>
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</h4>
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<pre><code class="example">$("p").dblclick( function () { alert("Hello World!"); });</code></pre>
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</div>
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<div id="example-1">
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<h4>Example: <span class="desc">Double click to toggle background color.</span>
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</h4>
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<pre><code class="example demo-code"><!DOCTYPE html>
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<html>
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<head>
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<style>
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div { background:blue;
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color:white;
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height:100px;
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width:150px;
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}
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div.dbl { background:yellow;color:black; }
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</style>
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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<div></div><span>Double click the block</span>
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<script>
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var divdbl = $("div:first");
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divdbl.dblclick(function () {
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divdbl.toggleClass('dbl');
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});
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</script>
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</body>
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</html></code></pre>
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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div>
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</div>
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</div>
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</div>
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</div>
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</body></html> |