09e0d3ec81
git-svn-id: http://svn.openlayers.org/trunk/openlayers@5614 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
75 lines
2.0 KiB
JavaScript
75 lines
2.0 KiB
JavaScript
/* 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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* Method: draw
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* Creates a Drag handler, using <OpenLayers.Control.PanMap.panMap> and
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* <OpenLayers.Control.PanMap.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, "done": this.panMapDone});
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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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var deltaX = this.handler.last.x - xy.x;
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var deltaY = this.handler.last.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, this.handler.dragging);
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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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});
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