07d333cc79
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.4-rc4@3178 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
60 lines
2.1 KiB
JavaScript
60 lines
2.1 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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* @class
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*
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* @requires OpenLayers/Control.js
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* @requires OpenLayers/Handler/Drag.js
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*/
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OpenLayers.Control.DragPan = OpenLayers.Class.create();
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OpenLayers.Control.DragPan.prototype =
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OpenLayers.Class.inherit( OpenLayers.Control, {
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/** @type OpenLayers.Control.TYPES */
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type: OpenLayers.Control.TYPE_TOOL,
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/**
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*
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*/
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draw: function() {
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this.handler = new OpenLayers.Handler.Drag( this,
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{"move": this.panMap, "up": this.panMapDone } );
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},
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/**
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* @param {OpenLayers.Pixel} xy Pixel of the up position
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*/
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panMap: function (xy) {
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var deltaX = this.handler.start.x - xy.x;
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var deltaY = this.handler.start.y - xy.y;
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var size = this.map.getSize();
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var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
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size.h / 2 + deltaY);
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var newCenter = this.map.getLonLatFromViewPortPx( newXY );
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this.map.setCenter(newCenter, null, true);
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// this assumes xy won't be changed inside Handler.Drag
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// a safe bet for now, and saves us the extra call to clone().
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this.handler.start = xy;
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},
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/**
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* @param {OpenLayers.Pixel} xy Pixel of the up position
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*/
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panMapDone: function (xy) {
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var deltaX = this.handler.start.x - xy.x;
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var deltaY = this.handler.start.y - xy.y;
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var size = this.map.getSize();
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var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
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size.h / 2 + deltaY);
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var newCenter = this.map.getLonLatFromViewPortPx( newXY );
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this.map.setCenter(newCenter, null, false);
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// this assumes xy won't be changed inside Handler.Drag
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// a safe bet for now, and saves us the extra call to clone().
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this.handler.start = xy;
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Control.DragPan"
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});
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