atlasuimap.js

《圣殿祭司的ASP.NET 2.0开发详解——使用C#》光盘内容.包含了书籍所含的源代码.非常经典的一本asp.net2.0的书籍

VE_MapControl._MouseWheel=function(e){if(!e)e=window.event;var t=VE_MapControl.GetTarget(e);var c=VE_MapControl.FindControlByTileImage(t);if(!c||c.panning||c.zooming){return false;}var delta=VE_MapControl.GetMouseScrollDelta(e);if(delta>0){c.ZoomIn();}else if(delta<0){c.ZoomOut();}e.cancelBubble=true;return false;}
VE_MapControl._ContextMenu=function(e){if(!e)e=window.event;e.cancelBubble=true;var t=VE_MapControl.GetTarget(e);var c=VE_MapControl.FindControlByTileImage(t);if(!c||c.debug){return true;}return false;}
VE_MapControl.prototype.PanMap=function(deltaX,deltaY){if(deltaX==0&&deltaY==0){return;}deltaX=this._ClipDeltaX(deltaX);deltaY=this._ClipDeltaY(deltaY);this.offsetX+=deltaX;this.offsetY+=deltaY;this.map.style.top=-this.offsetY+"px";this.map.style.left=-this.offsetX+"px";this._UpdateMap(deltaX,deltaY);this._UpdateCopyright();}
VE_MapControl.prototype.ContinuousPan=function(deltaX,deltaY,count,keyboardPan){if(this.zooming){return;}if(!count){count=-1;}this.panningX=deltaX;this.panningY=deltaY;this.panCounter=count;if(!deltaX&&!deltaY){this.StopContinuousPan();return;}this.keyboardPan=keyboardPan;if(!this.panning){this.panning=true;VE_MapControl._StepPan(this.index);this._CallStartContinuousPan();}}
VE_MapControl._StepPan=function(controlIndex){var c=VE_MapControl.controlList[controlIndex];if(c.panning){c.PanMap(c.panningX,c.panningY);if(c.panCounter>0)c.panCounter--;if(c.panCounter!=0)window.setTimeout("VE_MapControl._StepPan("+controlIndex+")",10);else c.StopContinuousPan();}}
VE_MapControl.prototype.StopContinuousPan=function(){this.panningX=0;this.panningY=0;this.panning=false;this.keyboardPanning=false;if(this.panLatitude!=null&&this.panLongitude!=null){var dx=this._LonToX(this.panLongitude)-(this.originX+this.offsetX+this.width/2);var dy=this._LatToY(this.panLatitude)-(this.originY+this.offsetY+this.height/2);this.PanMap(dx,dy);this.latitude=this.panLatitude;this.longitude=this.panLongitude;this.preferredLatitude=this.latitude;this.preferredLongitude=this.longitude;this.panLatitude=null;this.panLongitude=null;}else{this._ComputeCenterPoint(true);}this._CallEndContinuousPan();}
VE_MapControl.prototype.PanToLatLong=function(latitude,longitude){this.panLatitude=latitude;this.panLongitude=longitude;var x=this._LonToX(longitude);var y=this._LatToY(latitude);var dx=x-(this.originX+this.offsetX+this.width/2);var dy=y-(this.originY+this.offsetY+this.height/2);var d=Math.sqrt(dx*dx+dy*dy);if(!VE_MapControl.animatedMovementEnabled||Math.abs(dx)>2*this.width||Math.abs(dy)>2*this.height||d>1.5*Math.sqrt(this.width*this.width+this.height*this.height)){this.SetCenter(latitude,longitude);return;}var a=Math.atan2(dy,dx);var s=VE_MapControl.panToLatLongSpeed;var c=Math.ceil(d/s);s=Math.round(d/c);dx=Math.cos(a)*s;dy=Math.sin(a)*s;this.ContinuousPan(dx,dy,c);}
VE_MapControl.prototype.AddPushpin=function(id,lat,lon,width,height,className,innerHtml,zIndex){var x=Math.round(this._LonToX(lon)-this.originX);var y=Math.round(this._LatToY(lat)-this.originY);var pin=null;if(this.unusedPushpins.length>0){pin=this.unusedPushpins.pop();pin.Recycle(id,lat,lon,x,y,width,height,className,innerHtml,zIndex);}else{pin=new VE_MapPushpin(this,id,lat,lon,x,y,width,height,className,innerHtml,zIndex);}this.pushpins.push(pin);this.map.appendChild(pin.el);return pin.el;}
VE_MapControl.prototype.RemovePushpin=function(id){for(var i=0;i<this.pushpins.length;i++){var p=this.pushpins[i];if(p.id==id){this.pushpins.splice(i,1);this.map.removeChild(p.el);this.unusedPushpins.push(p);p.el.vePushpin=null;return;}}}
VE_MapControl.prototype.ClearPushpins=function(){var p=this.pushpins;while(p.length>0)this.map.removeChild(p.pop().el);}
VE_MapControl.prototype._RepositionPushpins=function(){for(var i=0;i<this.pushpins.length;i++){var p=this.pushpins[i];var x=Math.round(this._LonToX(p.lon)-this.originX);var y=Math.round(this._LatToY(p.lat)-this.originY);p.SetCurrentState(x,y);p.PrecomputeSteps();p.SetFactor(0);}}
function VE_MapPushpin(c,id,lat,lon,x,y,w,h,className,innerHtml,zIndex){this.c=c;this.id=id;this.lat=lat;this.lon=lon;this.w=w;this.h=h;var n=VE_MapControl.zoomTotalSteps+1;this.xs=new Array(n);this.ys=new Array(n);var el=document.createElement("div");el.id=id;el.vePushpin=this;el.className=className;el.style.position="absolute";el.style.zIndex=zIndex;el.innerHTML=innerHtml;el.ondblclick=VE_MapPushpin._MouseDoubleClick;el.onmousewheel=VE_MapPushpin._MouseWheel;el.unselectable="on";this.el=el;this.SetCurrentState(x,y);this.SetNextState(x,y);this.PrecomputeSteps();this.SetFactor(0);}
VE_MapPushpin.prototype.Recycle=function(id,lat,lon,x,y,w,h,className,innerHtml,zIndex){this.id=id;this.lat=lat;this.lon=lon;this.w=w;this.h=h;this.el.id=id;this.el.className=className;this.el.style.zIndex=zIndex;this.el.innerHTML=innerHtml;this.el.vePushpin=this;this.SetCurrentState(x,y);this.SetNextState(x,y);this.PrecomputeSteps();this.SetFactor(0);}
VE_MapPushpin.prototype.SetCurrentState=function(x,y){this.x=x;this.y=y;}
VE_MapPushpin.prototype.SetNextState=function(x,y){this._x=x;this._y=y;}
VE_MapPushpin.prototype.ClearSteps=function(){var n=VE_MapControl.zoomTotalSteps;for(var i=0;i<=n;i++){this.xs[i]=this.x;this.ys[i]=this.y;}}
VE_MapPushpin.prototype.PrecomputeSteps=function(){var n=VE_MapControl.zoomTotalSteps;for(var i=0;i<=n;i++){var a=i/n;var b=1.0-a;this.xs[i]=Math.floor(b*this.x+a*this._x-this.w/2);this.ys[i]=Math.floor(b*this.y+a*this._y-this.h/2);}}
VE_MapPushpin.prototype.SetFactor=function(i){with(this.el.style){left=this.xs[i];top=this.ys[i];}}
VE_MapPushpin.prototype.SwapStates=function(){var t=0;t=this.x;this.x=this._x;this._x=t;t=this.y;this.y=this._y;this._y=t;}
VE_MapPushpin._MouseDoubleClick=function(e){if(!e){e=window.event;}var t=VE_MapControl.GetTarget(e);if(!t){return false;}var p=t.vePushpin;if(!p){return false;}var c=p.c;if(!c||c.panning||c.zooming){return false;}if(e.altKey){if(c.zoomLevel==VE_MapControl.minZoom)c.PanToLatLong(p.lat,p.lon);else c.SetCenterAndZoom(p.lat,p.lon,c.zoomLevel-1);}else{if(c.zoomLevel==VE_MapControl.maxZoom)c.PanToLatLong(p.lat,p.lon);else c.SetCenterAndZoom(p.lat,p.lon,c.zoomLevel+1);}return false;}
VE_MapPushpin._MouseWheel=function(e){if(!e){e=window.event;}var t=VE_MapControl.GetTarget(e);if(!t){return false;}var p=t.vePushpin;if(!p){return false;}var c=p.c;if(!c||c.panning||c.zooming){return false;}var delta=VE_MapControl.GetMouseScrollDelta(e);if(delta>0){c.ZoomIn();}else if(delta<0){c.ZoomOut();}e.cancelBubble=true;return false;}
VE_MapControl.prototype._RequestTile=function(x,y,zl,size,style){var t=null;var max=1<<zl;if(x<0||y<0||x>=max||y>=max){return;}if(this.unusedTiles.length>0){t=this.unusedTiles.pop();t.Recycle(x,y,zl,style,(x*size-this.originX),(y*size-this.originY),size,size);}else{t=new VE_MapTile(this,x,y,zl,style,(x*size-this.originX),(y*size-this.originY),size,size);}if(t){if(this.debug){t.img.style.border="1px dashed red";}this.tiles.push(t);}}
function PrefixNumber(n){if(n>=0)return"+"+n;return n;}
VE_MapControl.FindControlByTileImage=function(tileImg){if(!tileImg.parentNode){return;}var m=tileImg.parentNode;var c=VE_MapControl.controlList;for(var i=0;i<c.length;i++){if(c[i].map==m)return c[i];}return null;}
function VE_MapTile(c,tx,ty,zl,ms,x,y,w,h){this.c=c;this.tx=tx;this.ty=ty;this.zl=zl;this.ms=ms;this.key=this._TileToQuadKey(zl,tx,ty);this.f=this._BuildFilename();this.id="tile_"+this.key;this.loading=true;this.unused=false;var n=VE_MapControl.zoomTotalSteps+1;this.xs=new Array(n);this.ys=new Array(n);this.ws=new Array(n);this.hs=new Array(n);var img=document.createElement("img");this.img=img;img.id=this.id;img.style.position="absolute";img.style.zIndex=VE_MapTile.baseZIndex;img.style.cursor="pointer";img.onmousedown=VE_MapControl._MouseDown;img.onmouseup=VE_MapControl._MouseUp;img.onmousemove=VE_MapControl._MouseMove;img.onmousewheel=VE_MapControl._MouseWheel;img.ondblclick=VE_MapControl._MouseDoubleClick;img.oncontextmenu=VE_MapControl._ContextMenu;if(window.addEventListener&&navigator.product&&navigator.product=="Gecko"){img.addEventListener("DOMMouseScroll",VE_MapControl._MouseWheel,false);}img.onload=VE_MapTile._Load;img.veTile=this;var overlay=document.createElement("div");this.overlay=overlay;overlay.style.position="absolute";overlay.style.background="white";overlay.style.color="red";overlay.style.width="1px";overlay.style.height="20px";overlay.style.zIndex=VE_MapTile.debugZIndex;overlay.innerHTML=this.key+"<br>"+tx+", "+ty;this.SetCurrentState(x,y,w,h);this.SetNextState(x,y,w,h);this.PrecomputeSteps();img.src=this.f;}
VE_MapTile.prototype._TileToQuadKey=function(zl,tx,ty){var quad="";for(var i=zl;i>0;i--){var mask=1<<(i-1);var cell=0;if((tx&mask)!=0){cell++;}if((ty&mask)!=0){cell+=2;}quad+=cell+"";}return quad;}
VE_MapTile.prototype._BuildFilename=function(){var server=((this.tx&1)+((this.ty&1)<<1))%VE_MapControl.tileUrlPrefixes.length;return VE_MapControl.tileUrlPrefixes[server]+this.ms+this.key+(this.ms=='r'?".png":".jpeg")+"?g="+VE_MapControl.tileVersion;}
VE_MapTile.prototype.Recycle=function(tx,ty,zl,ms,x,y,w,h){this.tx=tx;this.ty=ty;this.zl=zl;this.ms=ms;this.key=this._TileToQuadKey(zl,tx,ty);this.f=this._BuildFilename();this.id="tile_"+this.key;this.overlay.innerHTML=this.key+"<br>"+tx+", "+ty;var w=this.w;var h=this.h;this.SetCurrentState(x,y,w,h);this.SetNextState(x,y,w,h);this.PrecomputeSteps();this.RemoveFromMap();this.loading=true;this.unused=false;this.img.veTile=this;this.img.src=this.f;}
VE_MapTile.prototype.SetCurrentState=function(x,y,w,h){this.x=x;this.y=y;this.w=w;this.h=h;}
VE_MapTile.prototype.SetNextState=function(x,y,w,h){this._x=x;this._y=y;this._w=w;this._h=h;}
VE_MapTile.prototype.ClearSteps=function(){var n=VE_MapControl.zoomTotalSteps;for(var i=0;i<=n;i++){this.xs[i]=this.x;this.ys[i]=this.y;this.ws[i]=this.w;this.hs[i]=this.h;}}
VE_MapTile.prototype.PrecomputeSteps=function(){var n=VE_MapControl.zoomTotalSteps;for(var i=0;i<=n;i++){var a=i/n;var b=1.0-a;this.xs[i]=Math.floor(b*this.x+a*this._x);this.ys[i]=Math.floor(b*this.y+a*this._y);this.ws[i]=Math.ceil(b*this.w+a*this._w);this.hs[i]=Math.ceil(b*this.h+a*this._h);}}
VE_MapTile.prototype.SetFactor=function(i){if(!this.loading){if(i>=this.xs.length)i=this.xs.length-1;with(this.img.style){left=this.xs[i];top=this.ys[i];width=this.ws[i];height=this.hs[i];}with(this.overlay.style){left=this.xs[i];top=this.ys[i];}}}
VE_MapTile.prototype.SwapStates=function(){var t=0;with(this){t=x;x=_x;_x=t;t=y;y=_y;_y=t;t=w;w=_w;_w=t;t=h;h=_h;_h=t;}}
VE_MapTile.prototype.RemoveFromMap=function(){var m=this.c.map;var i=this.img;var o=this.overlay;if(i.parentNode==m){m.removeChild(i);}if(o.parentNode==m){m.removeChild(o);}this.unused=true;this.img.src=VE_MapControl.emptyTile;}
VE_MapTile._Load=function(){if(!this.veTile){return;}with(this.veTile){if(!loading){return;}loading=false;if(!unused){SetFactor(c.zoomCounter);c.map.appendChild(img);if(c.debug){c.map.appendChild(overlay);}}}this.veTile=null;}
VE_MapControl.prototype.SetViewport=function(lat1,lon1,lat2,lon2){var z=0;var w=Math.abs(this._LonToXAtZ(lon1,z)-this._LonToXAtZ(lon2,z));var h=Math.abs(this._LatToYAtZ(lat1,z)-this._LatToYAtZ(lat2,z));while(z<VE_MapControl.maxZoom&&w<this.width&&h<this.height){z++;w=Math.abs(this._LonToXAtZ(lon1,z)-this._LonToXAtZ(lon2,z));h=Math.abs(this._LatToYAtZ(lat1,z)-this._LatToYAtZ(lat2,z));}z=Math.max(0,Math.min(VE_MapControl.maxZoom,z-1));var lat=0.5*(lat1+lat2);var lon=0.5*(lon1+lon2);this.SetCenterAndZoom(lat,lon,z);}
VE_MapControl.prototype.SetBestMapView=function(l){if(!l||l.constructor!=Array){return;}var a=l[0].latitude;var b=l[0].longitude;var c=a;var d=b;for(var i=1;i<l.length;i++){a=Math.min(a,l[i].latitude);b=Math.min(b,l[i].longitude);c=Math.max(c,l[i].latitude);d=Math.max(d,l[i].longitude);}var dLat=(c-a)*0.1;var dLon=(d-b)*0.1;a-=dLat;b-=dLon;c+=dLat;d+=dLon;this.SetViewport(VE_MapControl.ClipLatitude(a),VE_MapControl.ClipLongitude(b),VE_MapControl.ClipLatitude(c),VE_MapControl.ClipLongitude(d));}
VE_MapControl.prototype.IncludePointInViewport=function(lat,lon){this.SetBestMapView(new Array(this,{latitude:lat,longitude:lon}));}
VE_MapControl.ClipLatitude=function(latitude){return VE_MapControl.Clip(latitude,VE_MapControl.minLatitude,VE_MapControl.maxLatitude);}
VE_MapControl.ClipLongitude=function(longitude){return VE_MapControl.Clip(longitude,VE_MapControl.minLongitude,VE_MapControl.maxLongitude);}
VE_MapControl.Clip=function(n,minValue,maxValue){if(n<minValue){return minValue;}if(n>maxValue){return maxValue;}return n;}
VE_MapControl.prototype.SetZoom=function(zoomLevel){zoomLevel=this._ValidateZoomLevel(this.preferredLatitude,this.preferredLongitude,zoomLevel);if(zoomLevel==this.zoomLevel){return;}this.SetCenterAndZoom(this.preferredLatitude,this.preferredLongitude,zoomLevel);}
VE_MapControl.prototype.ZoomIn=function(){if(this.zoomLevel>=VE_MapControl.maxZoom)return;this.SetZoom(this.zoomLevel+1);}
VE_MapControl.prototype.ZoomOut=function(){if(this.zoomLevel<=VE_MapControl.minZoom)return;this.SetZoom(this.zoomLevel-1);}
VE_MapControl.prototype.SetCenterAndZoom=function(latitude,longitude,newZoom){newZoom=this._ValidateZoomLevel(latitude,longitude,newZoom);this.preferredLatitude=latitude;this.preferredLongitude=longitude;if(this.zooming||this.panning||this.dragging){return;}this.zooming=true;this.prevZoomLevel=oldZoom;if(this.zoomLevel!=newZoom)this._CallStartZoom();latitude=this._ClipLatitude(latitude,newZoom);longitude=this._ClipLongitude(longitude,newZoom);this.latitude=latitude;this.longitude=longitude;var dx=(this.width/2)-this.GetX(longitude);var dy=(this.height/2)-this.GetY(latitude);var distance=Math.sqrt(dx*dx+dy*dy);var dynamic=(distance<this.width&&distance<this.height)&&(newZoom==this.zoomLevel-1||newZoom==this.zoomLevel+1)&&VE_MapControl.animatedMovementEnabled;if(dynamic){var oldOriginX=this.originX+this.offsetX;var oldOriginY=this.originY+this.offsetY;var oldZoom=this.zoomLevel;var newOriginX=Math.round(this._LonToXAtZ(longitude,newZoom)-this.width/2);var newOriginY=Math.round(this._LatToYAtZ(latitude,newZoom)-this.height/2);this.oldTiles=this.tiles;this.tiles=new Array();var ot=this.oldTiles;var nt=this.tiles;var pp=this.pushpins;for(var i=0;i<ot.length;i++){ot[i].SetCurrentState(ot[i].x-this.offsetX,ot[i].y-this.offsetY,ot[i].w,ot[i].h,ot[i].o);var x1=Math.floor(this._XToXAtZ(oldOriginX+ot[i].x,oldZoom,newZoom)-newOriginX);var y1=Math.floor(this._YToYAtZ(oldOriginY+ot[i].y,oldZoom,newZoom)-newOriginY);var x2=Math.ceil(this._XToXAtZ(oldOriginX+ot[i].x+ot[i].w,oldZoom,newZoom)-newOriginX);var y2=Math.ceil(this._YToYAtZ(oldOriginY+ot[i].y+ot[i].h,oldZoom,newZoom)-newOriginY);ot[i].SetNextState(x1,y1,x2-x1,y2-y1,100);ot[i].PrecomputeSteps();ot[i].img.style.zIndex=VE_MapTile.baseZIndex;}for(var i=0;i<pp.length;i++){pp[i].SetCurrentState(pp[i].x-this.offsetX,pp[i].y-this.offsetY);var x=Math.floor(this._LonToXAtZ(pp[i].lon,newZoom)-newOriginX);var y=Math.floor(this._LatToYAtZ(pp[i].lat,newZoom)-newOriginY);pp[i].SetNextState(x,y);pp[i].PrecomputeSteps();}this.zoomLevel=newZoom;this.latitude=latitude;this.longitude=longitude;this._StartMap();for(var i=0;i<nt.length;i++){var x1=Math.floor(this._XToXAtZ(newOriginX+nt[i].x,newZoom,oldZoom)-oldOriginX);var y1=Math.floor(this._YToYAtZ(newOriginY+nt[i].y,newZoom,oldZoom)-oldOriginY);var x2=Math.ceil(this._XToXAtZ(newOriginX+nt[i].x+nt[i].w,newZoom,oldZoom)-oldOriginX);var y2=Math.ceil(this._YToYAtZ(newOriginY+nt[i].y+nt[i].h,newZoom,oldZoom)-oldOriginY);nt[i].SetNextState(x1,y1,x2-x1,y2-y1,0);nt[i].SwapStates();nt[i].PrecomputeSteps();nt[i].img.style.zIndex=VE_MapTile.swapZIndex;}this.zoomCounter=0;VE_MapControl._StepAnimatedZoom(this.index);}else{this.oldTiles=this.tiles;this.tiles=new Array();this.zoomLevel=newZoom;this.latitude=latitude;this.longitude=longitude;this._StartMap();this._FinalizeZoom();this._RepositionPushpins();}}
VE_MapControl._StepAnimatedZoom=function(controlIndex){var c=VE_MapControl.controlList[controlIndex];if(!c.zooming)return;if(c.zoomCounter<=VE_MapControl.zoomTotalSteps){var f=c.zoomCounter++;for(var i=0;i<c.oldTiles.length;i++){c.oldTiles[i].SetFactor(f);}for(var i=0;i<c.tiles.length;i++){c.tiles[i].SetFactor(f);}for(var i=0;i<c.pushpins.length;i++){c.pushpins[i].SetFactor(f);}window.setTimeout("VE_MapControl._StepAnimatedZoom("+controlIndex+")",1);}else{c._FinalizeZoom();}}
VE_MapControl.prototype._FinalizeZoom=function(){var t=this.oldTiles;var u=this.unusedTiles;var m=this.map;if(t&&t.length>0){while(t.length>0){var tile=t.pop();tile.RemoveFromMap();u.push(tile);}this.oldTiles=null;}for(var i=0;i<this.tiles.length;i++){this.tiles[i].SwapStates();this.tiles[i].ClearSteps();}for(var i=0;i<this.pushpins.length;i++){this.pushpins[i].SwapStates();this.pushpins[i].ClearSteps();}this.zooming=false;this.zoomCounter=0;this._UpdateCopyright();if(this.prevZoomLevel!=this.zoomLevel)this._CallEndZoom();}
Web.UI.MapStyle =Web.Enum.create('Road','Aerial','Hybrid');Web.UI.ActivationType =Web.Enum.create('None','Hover','Click');Web.UI.VirtualEarthMap =function(associatedElement){Web.UI.VirtualEarthMap.initializeBase(this,[associatedElement]);var _map;var _pushpinActivation =Web.UI.ActivationType.None;var _popupPositioningMode =Web.UI.PositioningMode.BottomLeft;var _pushpins;var _data;var _latitude;var _longitude;var _zoomLevel =0;var _mapStyle =Web.UI.MapStyle.Road;var _width;var _height;var _pushpinImageURL;var _pushpinImageWidth =0;var _pushpinImageHeight =0;var _pushpinCssClass;var _popupCssClass;var _dataValueField;var _dataLatitudeField;var _dataLongitudeField;var _dataImageURLField;var _dataImageURLFormatString ="{0}";var _dataImageWidthField;var _dataImageHeightField;var _dataTextField;var _dataTextFormatString ="{0}";var _dataChangedDelegate;var _popupTemplate;var _queuedPushpinID;var _activatePushpinHandler;var _endContinuousPanHandler;this.endContinuousPan =this.createEvent();this.get_popupPositioningMode =function(){return _popupPositioningMode;}
this.set_popupPositioningMode =function(value){_popupPositioningMode =value;}
this.get_pushpinActivation =function(){return _pushpinActivation;}
this.set_pushpinActivation =function(value){_pushpinActivation =value;}
this.get_pushpins =function(){if (_pushpins ==null){_pushpins =Web.Component.createCollection(this);}
return _pushpins;}
this.get_data =function(){return _data;}
this.set_data =function(value){if (_data &&Web.INotifyCollectionChanged.isImplementedBy(_data)){_data.collectionChanged.remove(_dataChangedDelegate);}
_data =value;if (_data){if (!Web.Data.DataTable.isInstanceOfType(_data)){_data =new Web.Data.DataTable(_data);}
_data.collectionChanged.add(_dataChangedDelegate);}
this.render();this.raisePropertyChanged('data');}
this.get_popupTemplate =function(){return _popupTemplate;}
this.set_popupTemplate =function(template){_popupTemplate =template;this.render();this.raisePropertyChanged('popupTemplate');}
this.get_latitude =function(){if (_map){return _map.GetCenterLatitude();}
return _latitude;}
this.set_latitude =function(value){if (_map){_map.SetCenter(value,this.get_longitude());}
else {_latitude =value;}
}
this.get_longitude =function(){if (_map){return _map.GetCenterLongitude();}
return _longitude;}
this.set_longitude =function(value){if (_map){_map.SetCenter(this.get_latitude(),value);}
else {_longitude =value;}
}
this.get_zoomLevel =function(){if (_map){return _map.GetZoomLevel();}