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<!DOCTYPE html>
<html>
<!--
Copyright 2010 The Closure Library Authors. All Rights Reserved.
Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<head>
<title>goog.events.KeyHandler</title>
<link rel="stylesheet" href="css/demo.css">
<style>
.input-group {
border: 1px solid black;
clear: both;
float: left;
margin-bottom: 1em;
padding: 1em;
}
#console {
position: fixed;
right: 0;
top: 0;
left: 400px;
bottom: 0;
overflow: auto;
}
#no-tab {
background: pink;
}
</style>
<script src="../base.js"></script>
<script>
goog.require('goog.debug.DivConsole');
goog.require('goog.events');
goog.require('goog.events.KeyCodes');
goog.require('goog.events.KeyHandler');
</script>
</head>
<body>
<h1>goog.events.KeyHandler</h1>
<p><button onclick="divConsole.clear()">Clear Console</button></p>
<div class="input-group">
<label>Plain input <input></label><br>
<label>Number input <input class="number-input"></label><br>
<label>Text area <textarea></textarea></label><br>
<div tabIndex="0">Focusable div</div>
</div>
<div id="no-tab" class="input-group">
No Tab inside this<br><br>
<label>Plain input <input></label><br>
<label>Number input <input class="number-input"></label><br>
<label>Text area <textarea></textarea></label><br>
<div tabIndex="0">Focusable div</div>
</div>
<div id="console"></div>
<script>
var divConsole = new goog.debug.DivConsole(document.getElementById('console'));
divConsole.setCapturing(true);
var logger = new goog.debug.Logger.getLogger('demo');
var docKh = new goog.events.KeyHandler(document);
goog.events.listen(docKh, 'key', function(e) {
logger.info('keyCode: ' + e.keyCode +
', charCode: ' + e.charCode +
', repeat: ' + e.repeat +
', target: ' + e.target +
', native event: ' + e.getBrowserEvent().type);
});
var noTabKh = new goog.events.KeyHandler(document.getElementById('no-tab'));
goog.events.listen(noTabKh, goog.events.KeyHandler.EventType.KEY, function(e) {
if (e.keyCode == goog.events.KeyCodes.TAB) {
e.preventDefault();
}
});
function numberInputKeyHandler(e) {
logger.info('isTextModifyingKeyEvent: ' +
goog.events.KeyCodes.isTextModifyingKeyEvent(e));
if (e.target.className != 'number-input' ||
e.ctrlKey ||
!e.shiftKey && e.keyCode >= goog.events.KeyCodes.ZERO &&
e.keyCode <= goog.events.KeyCodes.NINE ||
!goog.events.KeyCodes.isTextModifyingKeyEvent(e)) {
return;
}
switch (e.keyCode) {
// Allow these
case goog.events.KeyCodes.DELETE:
case goog.events.KeyCodes.BACKSPACE:
case goog.events.KeyCodes.TAB:
return;
}
// prevent default for the rest
e.preventDefault();
}
goog.events.listen(docKh, goog.events.KeyHandler.EventType.KEY,
numberInputKeyHandler);
</script>
</body>
</html>
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