/* Copyright (c) 2006 MetaCarta, Inc., published under a modified BSD license.
 * See http://svn.openlayers.org/trunk/openlayers/release-license.txt 
 * for the full text of the license. */
OpenLayers.Control.PanZoomBarSlide=OpenLayers.Class.create();OpenLayers.Control.PanZoomBarSlide.X=4;OpenLayers.Control.PanZoomBarSlide.Y=4;OpenLayers.Control.PanZoomBarSlide.prototype=OpenLayers.Class.inherit(OpenLayers.Control.PanZoomSlide,{buttons:null,zoomStopWidth:18,zoomStopHeight:11,initialize:function(){OpenLayers.Control.PanZoom.prototype.initialize.apply(this,arguments);this.position=new OpenLayers.Pixel(OpenLayers.Control.PanZoomBarSlide.X,OpenLayers.Control.PanZoomBarSlide.Y);},setMap:function(map){OpenLayers.Control.PanZoom.prototype.setMap.apply(this,arguments);this.map.events.register("changebaselayer",this,this.redraw);},redraw:function(){if(this.div!=null){this.div.innerHTML="";}
this.draw();},draw:function(px){OpenLayers.Control.prototype.draw.apply(this,arguments);px=this.position.clone();this.buttons=new Array();var sz=new OpenLayers.Size(18,18);var centered=new OpenLayers.Pixel(px.x+sz.w/2,px.y);this._addButton("panup","north-mini.png",centered,sz);px.y=centered.y+sz.h;this._addButton("panleft","west-mini.png",px,sz);this._addButton("panright","east-mini.png",px.add(sz.w,0),sz);this._addButton("pandown","south-mini.png",centered.add(0,sz.h*2),sz);this._addButton("zoomin","zoom-plus-mini.png",centered.add(0,sz.h*3+5),sz);centered=this._addZoomBar(centered.add(0,sz.h*4+5));this._addButton("zoomout","zoom-minus-mini.png",centered,sz);return this.div;},_addZoomBar:function(centered){var imgLocation=OpenLayers.Util.getImagesLocation();var id="OpenLayers_Control_PanZoomBar_Slider"+this.map.id;var zoomsToEnd=this.map.getNumZoomLevels()-1-this.map.getZoom();var slider=OpenLayers.Util.createAlphaImageDiv(id,centered.add(-1,zoomsToEnd*this.zoomStopHeight),new OpenLayers.Size(20,9),imgLocation+"slider.png","absolute");this.slider=slider;this.sliderEvents=new OpenLayers.Events(this,slider,null,true);this.sliderEvents.register("mousedown",this,this.zoomBarDown);this.sliderEvents.register("mousemove",this,this.zoomBarDrag);this.sliderEvents.register("mouseup",this,this.zoomBarUp);this.sliderEvents.register("dblclick",this,this.doubleClick);this.sliderEvents.register("click",this,this.doubleClick);sz=new OpenLayers.Size();sz.h=this.zoomStopHeight*this.map.getNumZoomLevels();sz.w=this.zoomStopWidth;var div=null
if(OpenLayers.Util.alphaHack()){var id="OpenLayers_Control_PanZoomBar"+this.map.id;div=OpenLayers.Util.createAlphaImageDiv(id,centered,new OpenLayers.Size(sz.w,this.zoomStopHeight),imgLocation+"zoombar.png","absolute",null,"crop");div.style.height=sz.h;}else{div=OpenLayers.Util.createDiv('OpenLayers_Control_PanZoomBar_Zoombar'+this.map.id,centered,sz,imgLocation+"zoombar.png");}
this.zoombarDiv=div;this.divEvents=new OpenLayers.Events(this,div,null,true);this.divEvents.register("mousedown",this,this.divClick);this.divEvents.register("mousemove",this,this.passEventToSlider);this.divEvents.register("dblclick",this,this.doubleClick);this.divEvents.register("click",this,this.doubleClick);this.div.appendChild(div);this.startTop=parseInt(div.style.top);this.div.appendChild(slider);this.map.events.register("zoomend",this,this.moveZoomBar);centered=centered.add(0,this.zoomStopHeight*this.map.getNumZoomLevels());return centered;},passEventToSlider:function(evt){this.sliderEvents.handleBrowserEvent(evt);},divClick:function(evt){if(!OpenLayers.Event.isLeftClick(evt))return;var y=evt.xy.y;var top=OpenLayers.Util.pagePosition(evt.object)[1];var levels=Math.floor((y-top)/this.zoomStopHeight);this.map.zoomTo((this.map.getNumZoomLevels()-1)-levels);OpenLayers.Event.stop(evt);},zoomBarDown:function(evt){if(!OpenLayers.Event.isLeftClick(evt))return;this.map.events.register("mousemove",this,this.passEventToSlider);this.map.events.register("mouseup",this,this.passEventToSlider);this.mouseDragStart=evt.xy.clone();this.zoomStart=evt.xy.clone();this.div.style.cursor="move";OpenLayers.Event.stop(evt);},zoomBarDrag:function(evt){if(this.mouseDragStart!=null){var deltaY=this.mouseDragStart.y-evt.xy.y
var offsets=OpenLayers.Util.pagePosition(this.zoombarDiv);if((evt.clientY-offsets[1])>0&&(evt.clientY-offsets[1])<parseInt(this.zoombarDiv.style.height)-2){var newTop=parseInt(this.slider.style.top)-deltaY;this.slider.style.top=newTop+"px";}
this.mouseDragStart=evt.xy.clone();OpenLayers.Event.stop(evt);}},zoomBarUp:function(evt){if(!OpenLayers.Event.isLeftClick(evt))return;if(this.zoomStart){this.div.style.cursor="default";this.map.events.unregister("mouseup",this,this.passEventToSlider);this.map.events.unregister("mousemove",this,this.passEventToSlider);var deltaY=this.zoomStart.y-evt.xy.y
this.map.zoomTo(this.map.zoom+Math.round(deltaY/this.zoomStopHeight));this.moveZoomBar();this.mouseDragStart=null;OpenLayers.Event.stop(evt);}},moveZoomBar:function(){var newTop=((this.map.getNumZoomLevels()-1)-this.map.getZoom())*this.zoomStopHeight+this.startTop+1;this.slider.style.top=newTop+"px";},CLASS_NAME:"OpenLayers.Control.PanZoomBar"});