| /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for | |
| * full list of contributors). Published under the Clear BSD license. | |
| * See http://svn.openlayers.org/trunk/openlayers/license.txt for the | |
| * full text of the license. */ | |
| /** | |
| * @requires OpenLayers/Control.js | |
| * @requires OpenLayers/Handler/Keyboard.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Control.KeyboardDefaults | |
| * The KeyboardDefaults control adds panning and zooming functions, controlled | |
| * with the keyboard. By default arrow keys pan, +/- keys zoom & Page Up/Page | |
| * Down/Home/End scroll by three quarters of a page. | |
| * | |
| * This control has no visible appearance. | |
| * | |
| * Inherits from: | |
| * - <OpenLayers.Control> | |
| */ | |
| OpenLayers.Control.KeyboardDefaults = OpenLayers.Class(OpenLayers.Control, { | |
| /** | |
| * APIProperty: autoActivate | |
| * {Boolean} Activate the control when it is added to a map. Default is | |
| * true. | |
| */ | |
| autoActivate: true, | |
| /** | |
| * APIProperty: slideFactor | |
| * Pixels to slide by. | |
| */ | |
| slideFactor: 75, | |
| /** | |
| * Constructor: OpenLayers.Control.KeyboardDefaults | |
| */ | |
| initialize: function() { | |
| OpenLayers.Control.prototype.initialize.apply(this, arguments); | |
| }, | |
| /** | |
| * APIMethod: destroy | |
| */ | |
| destroy: function() { | |
| if (this.handler) { | |
| this.handler.destroy(); | |
| } | |
| this.handler = null; | |
| OpenLayers.Control.prototype.destroy.apply(this, arguments); | |
| }, | |
| /** | |
| * Method: draw | |
| * Create handler. | |
| */ | |
| draw: function() { | |
| this.handler = new OpenLayers.Handler.Keyboard( this, { | |
| "keydown": this.defaultKeyPress }); | |
| }, | |
| /** | |
| * Method: defaultKeyPress | |
| * When handling the key event, we only use evt.keyCode. This holds | |
| * some drawbacks, though we get around them below. When interpretting | |
| * the keycodes below (including the comments associated with them), | |
| * consult the URL below. For instance, the Safari browser returns | |
| * "IE keycodes", and so is supported by any keycode labeled "IE". | |
| * | |
| * Very informative URL: | |
| * http://unixpapa.com/js/key.html | |
| * | |
| * Parameters: | |
| * code - {Integer} | |
| */ | |
| defaultKeyPress: function (evt) { | |
| switch(evt.keyCode) { | |
| case OpenLayers.Event.KEY_LEFT: | |
| this.map.pan(-this.slideFactor, 0); | |
| break; | |
| case OpenLayers.Event.KEY_RIGHT: | |
| this.map.pan(this.slideFactor, 0); | |
| break; | |
| case OpenLayers.Event.KEY_UP: | |
| this.map.pan(0, -this.slideFactor); | |
| break; | |
| case OpenLayers.Event.KEY_DOWN: | |
| this.map.pan(0, this.slideFactor); | |
| break; | |
| case 33: // Page Up. Same in all browsers. | |
| var size = this.map.getSize(); | |
| this.map.pan(0, -0.75*size.h); | |
| break; | |
| case 34: // Page Down. Same in all browsers. | |
| var size = this.map.getSize(); | |
| this.map.pan(0, 0.75*size.h); | |
| break; | |
| case 35: // End. Same in all browsers. | |
| var size = this.map.getSize(); | |
| this.map.pan(0.75*size.w, 0); | |
| break; | |
| case 36: // Home. Same in all browsers. | |
| var size = this.map.getSize(); | |
| this.map.pan(-0.75*size.w, 0); | |
| break; | |
| case 43: // +/= (ASCII), keypad + (ASCII, Opera) | |
| case 61: // +/= (Mozilla, Opera, some ASCII) | |
| case 187: // +/= (IE) | |
| case 107: // keypad + (IE, Mozilla) | |
| this.map.zoomIn(); | |
| break; | |
| case 45: // -/_ (ASCII, Opera), keypad - (ASCII, Opera) | |
| case 109: // -/_ (Mozilla), keypad - (Mozilla, IE) | |
| case 189: // -/_ (IE) | |
| case 95: // -/_ (some ASCII) | |
| this.map.zoomOut(); | |
| break; | |
| } | |
| }, | |
| CLASS_NAME: "OpenLayers.Control.KeyboardDefaults" | |
| }); | |