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/*
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Author: Steven Ottens AT geodan.nl
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: Back.js 3587 2007-11-12 12:24:58Z ahocevar $
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*/
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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/widget/ButtonBase.js");
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/**
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* When this button is pressed the map will reload with it's original extent
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* @constructor
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* @base ButtonBase
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* @author Steven Ottens AT geodan.nl
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* @param widgetNode The widget node from the Config XML file.
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* @param model The model for this widget
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*/
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function Back(widgetNode, model) {
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ButtonBase.apply(this, new Array(widgetNode, model));
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/**
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* Interactive ZoomOut control.
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* @param objRef reference to this object.
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* @return {OpenLayers.Control} instance of the OL control.
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*/
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this.createControl = function(objRef) {
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var Control = OpenLayers.Class( OpenLayers.Control, {
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type: OpenLayers.Control.TYPE_BUTTON,
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trigger: function() {
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var objRef = this.objRef;
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objRef.targetModel.setParam("historyBack");
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var previousExtent = objRef.targetModel.previousExtent;
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if(previousExtent){
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objRef.targetModel.setParam("historyStop");
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this.map.setCenter(previousExtent.center);
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this.map.zoomToScale(previousExtent.scale);
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objRef.targetModel.setParam("historyStart");
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}
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},
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CLASS_NAME: 'mbControl.Back'
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});
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return Control;
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}
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}
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