| /* 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/Drag.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Control.DragPan | |
| * The DragPan control pans the map with a drag of the mouse. | |
| * | |
| * Inherits from: | |
| * - <OpenLayers.Control> | |
| */ | |
| OpenLayers.Control.DragPan = OpenLayers.Class(OpenLayers.Control, { | |
| /** | |
| * Property: type | |
| * {OpenLayers.Control.TYPES} | |
| */ | |
| type: OpenLayers.Control.TYPE_TOOL, | |
| /** | |
| * Property: panned | |
| * {Boolean} The map moved. | |
| */ | |
| panned: false, | |
| /** | |
| * Property: interval | |
| * {Integer} The number of milliseconds that should ellapse before | |
| * panning the map again. Set this to increase dragging performance. | |
| * Defaults to 25 milliseconds. | |
| */ | |
| interval: 25, | |
| /** | |
| * APIProperty: documentDrag | |
| * {Boolean} If set to true, mouse dragging will continue even if the | |
| * mouse cursor leaves the map viewport. Default is false. | |
| */ | |
| documentDrag: false, | |
| /** | |
| * Method: draw | |
| * Creates a Drag handler, using <panMap> and | |
| * <panMapDone> as callbacks. | |
| */ | |
| draw: function() { | |
| this.handler = new OpenLayers.Handler.Drag(this, { | |
| "move": this.panMap, | |
| "done": this.panMapDone | |
| }, { | |
| interval: this.interval, | |
| documentDrag: this.documentDrag | |
| } | |
| ); | |
| }, | |
| /** | |
| * Method: panMap | |
| * | |
| * Parameters: | |
| * xy - {<OpenLayers.Pixel>} Pixel of the mouse position | |
| */ | |
| panMap: function(xy) { | |
| this.panned = true; | |
| this.map.pan( | |
| this.handler.last.x - xy.x, | |
| this.handler.last.y - xy.y, | |
| {dragging: this.handler.dragging, animate: false} | |
| ); | |
| }, | |
| /** | |
| * Method: panMapDone | |
| * Finish the panning operation. Only call setCenter (through <panMap>) | |
| * if the map has actually been moved. | |
| * | |
| * Parameters: | |
| * xy - {<OpenLayers.Pixel>} Pixel of the mouse position | |
| */ | |
| panMapDone: function(xy) { | |
| if(this.panned) { | |
| this.panMap(xy); | |
| this.panned = false; | |
| } | |
| }, | |
| CLASS_NAME: "OpenLayers.Control.DragPan" | |
| }); | |