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Viewing changes to gis/dhis-gis-geostat/mfbase/openlayers/lib/OpenLayers/Control/DragPan.js

  • Committer: larshelge at gmail
  • Date: 2009-03-03 16:46:36 UTC
  • Revision ID: larshelge@gmail.com-20090303164636-2sjlrquo7ib1gf7r
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gis/dhis-gis-geostat/mfbase/openlayers/lib/OpenLayers/Control/DragPan.js
 
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/* 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/Drag.js
 
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 */
 
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/**
 
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 * Class: OpenLayers.Control.DragPan
 
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 * DragPan control.
 
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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.DragPan = OpenLayers.Class(OpenLayers.Control, {
 
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    /** 
 
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     * Property: type
 
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     * {OpenLayers.Control.TYPES}
 
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     */
 
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    type: OpenLayers.Control.TYPE_TOOL,
 
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    /**
 
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     * Property: panned
 
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     * {Boolean} The map moved.
 
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     */
 
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    panned: false,
 
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    /**
 
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     * Property: interval
 
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     * {Integer} The number of milliseconds that should ellapse before
 
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     *     panning the map again. Set this to increase dragging performance.
 
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     *     Defaults to 25 milliseconds.
 
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     */
 
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    interval: 25, 
 
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    /**
 
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     * Method: draw
 
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     * Creates a Drag handler, using <panMap> and
 
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     * <panMapDone> as callbacks.
 
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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,
 
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                "done": this.panMapDone
 
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            }, {
 
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                interval: this.interval
 
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            }
 
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        );
 
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    },
 
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    /**
 
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    * Method: panMap
 
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    *
 
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    * Parameters:
 
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    * xy - {<OpenLayers.Pixel>} Pixel of the mouse position
 
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    */
 
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    panMap: function(xy) {
 
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        this.panned = true;
 
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        this.map.pan(
 
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            this.handler.last.x - xy.x,
 
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            this.handler.last.y - xy.y,
 
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            {dragging: this.handler.dragging, animate: false}
 
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        );
 
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    },
 
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    /**
 
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     * Method: panMapDone
 
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     * Finish the panning operation.  Only call setCenter (through <panMap>)
 
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     *     if the map has actually been moved.
 
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     *
 
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     * Parameters:
 
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     * xy - {<OpenLayers.Pixel>} Pixel of the mouse position
 
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     */
 
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    panMapDone: function(xy) {
 
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        if(this.panned) {
 
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            this.panMap(xy);
 
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            this.panned = false;
 
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        }
 
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    },
 
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    CLASS_NAME: "OpenLayers.Control.DragPan"
 
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});