fd4d2918f1
git-svn-id: http://svn.openlayers.org/trunk/openlayers@3787 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
73 lines
2.3 KiB
JavaScript
73 lines
2.3 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under a modified BSD license.
|
|
* See http://svn.openlayers.org/trunk/openlayers/repository-license.txt
|
|
* for the full text of the license. */
|
|
|
|
/**
|
|
* @requires OpenLayers/Control.js
|
|
* @requires OpenLayers/Handler/Drag.js
|
|
*
|
|
* Class: OpenLayers.Control.DragPan
|
|
* DragPan control.
|
|
*
|
|
* Inherits from:
|
|
* - <OpenLayers.Control>
|
|
*/
|
|
OpenLayers.Control.DragPan = OpenLayers.Class(OpenLayers.Control, {
|
|
|
|
/**
|
|
* Property: type
|
|
* {OpenLayers.Control.TYPES}
|
|
*/
|
|
type: OpenLayers.Control.TYPE_TOOL,
|
|
|
|
/**
|
|
* Method: draw
|
|
* Creates a Drag handler, using <OpenLayers.Control.PanMap.panMap> and
|
|
* <OpenLayers.Control.PanMap.panMapDone> as callbacks.
|
|
*/
|
|
draw: function() {
|
|
this.handler = new OpenLayers.Handler.Drag( this,
|
|
{"move": this.panMap, "up": this.panMapDone } );
|
|
},
|
|
|
|
/**
|
|
* Method: panMap
|
|
*
|
|
* Parameters:
|
|
* xy - {<OpenLayers.Pixel>} Pixel of the up position
|
|
*/
|
|
panMap: function (xy) {
|
|
var deltaX = this.handler.start.x - xy.x;
|
|
var deltaY = this.handler.start.y - xy.y;
|
|
var size = this.map.getSize();
|
|
var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
|
|
size.h / 2 + deltaY);
|
|
var newCenter = this.map.getLonLatFromViewPortPx( newXY );
|
|
this.map.setCenter(newCenter, null, true);
|
|
// this assumes xy won't be changed inside Handler.Drag
|
|
// a safe bet for now, and saves us the extra call to clone().
|
|
this.handler.start = xy;
|
|
},
|
|
|
|
/**
|
|
* Method: panMapDone
|
|
*
|
|
* Parameters:
|
|
* xy - {<OpenLayers.Pixel>} Pixel of the up position
|
|
*/
|
|
panMapDone: function (xy) {
|
|
var deltaX = this.handler.start.x - xy.x;
|
|
var deltaY = this.handler.start.y - xy.y;
|
|
var size = this.map.getSize();
|
|
var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
|
|
size.h / 2 + deltaY);
|
|
var newCenter = this.map.getLonLatFromViewPortPx( newXY );
|
|
this.map.setCenter(newCenter, null, false);
|
|
// this assumes xy won't be changed inside Handler.Drag
|
|
// a safe bet for now, and saves us the extra call to clone().
|
|
this.handler.start = xy;
|
|
},
|
|
|
|
CLASS_NAME: "OpenLayers.Control.DragPan"
|
|
});
|