dcd05d13ce
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.4-rc5@3182 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
77 lines
2.3 KiB
JavaScript
77 lines
2.3 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* Handler for dragging a rectangle across the map. Keyboard is displayed
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* on mouse down, moves on mouse move, and is finished on mouse up.
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*
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* @class
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* @requires OpenLayers/Handler.js
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* @requires OpenLayers/Events.js
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*/
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OpenLayers.Handler.Keyboard = OpenLayers.Class.create();
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OpenLayers.Handler.Keyboard.prototype = OpenLayers.Class.inherit( OpenLayers.Handler, {
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/* http://www.quirksmode.org/js/keys.html explains key x-browser
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key handling quirks in pretty nice detail */
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/* supported named callbacks are: keyup, keydown, keypress */
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/** constant */
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KEY_EVENTS: ["keydown", "keypress", "keyup"],
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/** @type Function
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* @private
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*/
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eventListener: null,
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initialize: function () {
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OpenLayers.Handler.prototype.initialize.apply(this, arguments);
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// cache the bound event listener method so it can be unobserved later
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this.eventListener = this.handleKeyEvent.bindAsEventListener(this);
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},
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/**
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*
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*/
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destroy: function() {
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this.deactivate();
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this.eventListener = null;
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OpenLayers.Control.prototype.destroy.apply(this, arguments);
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},
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activate: function() {
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if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
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for (var i = 0; i < this.KEY_EVENTS.length; i++) {
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OpenLayers.Event.observe(
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window, this.KEY_EVENTS[i], this.eventListener);
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}
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return true;
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} else {
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return false;
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}
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},
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deactivate: function() {
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if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
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for (var i = 0; i < this.KEY_EVENTS.length; i++) {
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OpenLayers.Event.stopObserving(
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document, this.KEY_EVENTS[i], this.eventListener);
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}
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return true;
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} else {
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return false;
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}
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},
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handleKeyEvent: function (evt) {
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if (this.checkModifiers(evt)) {
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this.callback(evt.type, [evt.charCode || evt.keyCode]);
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}
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Handler.Keyboard"
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});
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