8b741bc666
git-svn-id: http://svn.openlayers.org/trunk/openlayers@9589 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
128 lines
4.0 KiB
JavaScript
128 lines
4.0 KiB
JavaScript
/* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD
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* license. See http://svn.openlayers.org/trunk/openlayers/license.txt for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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* @requires OpenLayers/Handler/Keyboard.js
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*/
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/**
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* Class: OpenLayers.Control.KeyboardDefaults
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* The KeyboardDefaults control adds panning and zooming functions, controlled
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* with the keyboard. By default arrow keys pan, +/- keys zoom & Page Up/Page
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* Down/Home/End scroll by three quarters of a page.
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*
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* This control has no visible appearance.
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*
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* Inherits from:
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* - <OpenLayers.Control>
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*/
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OpenLayers.Control.KeyboardDefaults = OpenLayers.Class(OpenLayers.Control, {
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/**
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* APIProperty: autoActivate
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* {Boolean} Activate the control when it is added to a map. Default is
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* true.
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*/
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autoActivate: true,
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/**
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* APIProperty: slideFactor
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* Pixels to slide by.
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*/
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slideFactor: 75,
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/**
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* Constructor: OpenLayers.Control.KeyboardDefaults
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*/
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initialize: function() {
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OpenLayers.Control.prototype.initialize.apply(this, arguments);
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},
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/**
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* APIMethod: destroy
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*/
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destroy: function() {
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if (this.handler) {
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this.handler.destroy();
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}
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this.handler = null;
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OpenLayers.Control.prototype.destroy.apply(this, arguments);
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},
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/**
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* Method: draw
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* Create handler.
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*/
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draw: function() {
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this.handler = new OpenLayers.Handler.Keyboard( this, {
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"keydown": this.defaultKeyPress });
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},
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/**
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* Method: defaultKeyPress
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* When handling the key event, we only use evt.keyCode. This holds
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* some drawbacks, though we get around them below. When interpretting
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* the keycodes below (including the comments associated with them),
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* consult the URL below. For instance, the Safari browser returns
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* "IE keycodes", and so is supported by any keycode labeled "IE".
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*
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* Very informative URL:
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* http://unixpapa.com/js/key.html
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*
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* Parameters:
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* code - {Integer}
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*/
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defaultKeyPress: function (evt) {
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switch(evt.keyCode) {
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case OpenLayers.Event.KEY_LEFT:
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this.map.pan(-this.slideFactor, 0);
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break;
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case OpenLayers.Event.KEY_RIGHT:
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this.map.pan(this.slideFactor, 0);
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break;
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case OpenLayers.Event.KEY_UP:
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this.map.pan(0, -this.slideFactor);
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break;
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case OpenLayers.Event.KEY_DOWN:
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this.map.pan(0, this.slideFactor);
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break;
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case 33: // Page Up. Same in all browsers.
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var size = this.map.getSize();
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this.map.pan(0, -0.75*size.h);
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break;
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case 34: // Page Down. Same in all browsers.
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var size = this.map.getSize();
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this.map.pan(0, 0.75*size.h);
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break;
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case 35: // End. Same in all browsers.
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var size = this.map.getSize();
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this.map.pan(0.75*size.w, 0);
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break;
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case 36: // Home. Same in all browsers.
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var size = this.map.getSize();
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this.map.pan(-0.75*size.w, 0);
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break;
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case 43: // +/= (ASCII), keypad + (ASCII, Opera)
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case 61: // +/= (Mozilla, Opera, some ASCII)
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case 187: // +/= (IE)
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case 107: // keypad + (IE, Mozilla)
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this.map.zoomIn();
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break;
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case 45: // -/_ (ASCII, Opera), keypad - (ASCII, Opera)
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case 109: // -/_ (Mozilla), keypad - (Mozilla, IE)
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case 189: // -/_ (IE)
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case 95: // -/_ (some ASCII)
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this.map.zoomOut();
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break;
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}
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},
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CLASS_NAME: "OpenLayers.Control.KeyboardDefaults"
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});
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