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VEShapeLayer.DeleteAllShapes Method

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Deletes all VEShape Class objects (pushpins, polylines, and polygons) from the layer.


VEShapeLayer.DeleteAllShapes();

Valid Shape objects are pushpin, polyline, or polygon.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
   <head>
      <title></title>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

      <script type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.3"></script>

      <script type="text/javascript">
         var map = null;
         var links = "Click for info: <a href='#' onClick='ShapeLayerInfo(0)'>Base Layer</a><br/>";
         var title = null;
         var layer = null;
         var selIndex = 0;
         var index = 0;
         var shapes = "";
         var shapeID = null;
 
         function GetMap()
         {
            map = new VEMap('myMap');

            // SetDashboardSize must be called before calling LoadMap
            map.SetDashboardSize("tiny");

            map.LoadMap();

            // Create some shape layers;
            // generate some links with index values;
            // display message with shape info on click.
            for (var i = 1; i < 4; i++)
            {
               layer = "layer" + i;
               layer = new VEShapeLayer();
               layer.SetTitle("ShapeLayer" + i);
               layer.SetDescription("This is ShapeLayer " + i + ".");
               title = layer.GetTitle();
               map.AddShapeLayer(layer);
               links += "Click for info:" +
                        "<a href='#' onClick='ShapeLayerInfo(" + i + ")'>" + 
                        title + "</a><br/>";
            }
            // Add a title and description for the base layer.
            baseLayer = map.GetShapeLayerByIndex(0);
            baseLayer.SetTitle("Base Layer");
            baseLayer.SetDescription(
               "This is the base layer. " +
               "It always has index 0, and cannot be deleted.");
            
            // Add links.
            divInfo.innerHTML = links;
            AddShapes();
            IndexChanged(0);
         } 
        
         // Add a shape to each layer.
         function AddShapes()
         {
            var points = new Array(
               new VELatLong(45.01188,-111.06687),
               new VELatLong(45.01534,-104.06324),
               new VELatLong(41.01929,-104.06),
               new VELatLong(41.003,-111.05878)
            );
            
            for (var i = 0; i < 4; i++)
            {
               shape = new VEShape(VEShapeType.Pushpin, points[i]);
               layer = map.GetShapeLayerByIndex(i);
               shape.SetDescription("This is pushpin " + i + ".");
               shape.SetTitle("Pushpin " + i);
               layer.AddShape(shape);
            }
            
            map.SetMapView(points);
         }
        
         // Display some info about each layer when the link is clicked.
         function ShapeLayerInfo(index)
         {
            var layer = map.GetShapeLayerByIndex(index);
            var count = layer.GetShapeCount();
            alert("Title: " + layer.GetTitle() + "\nIndex: " + 
               index + "\nDescription: " + layer.GetDescription() + 
               "\nShape Count: " + count);
         }
        
         // Hide the layer at the selected index.
         function HideLayer()
         {
            layer = map.GetShapeLayerByIndex(selIndex);

            if(layer.IsVisible())
            {
               layer.Hide();
            }
         }
        
         // Hide all layers.
         function HideAllLayers()
         {  
            map.HideAllShapeLayers();
         }
        
         // Show all layers.
         function ShowAllLayers()
         {  
            map.ShowAllShapeLayers();
         }
        
         // Make the layer at the selected index visible again.
         function ShowLayer()
         {
            layer = map.GetShapeLayerByIndex(selIndex);

            if(!layer.IsVisible())
            {
               layer.Show();
            }
         }
        
         // Add a shape to the center of the layer at the selected index.
         function AddShapeToLayer()
         {
            var center = new VELatLong();
            center = map.GetCenter();
            shape = new VEShape(VEShapeType.Pushpin, center);
            shape.SetTitle("Another new shape");
            layer = map.GetShapeLayerByIndex(selIndex);
            layer.AddShape(shape);
            AdjustView();
            IndexChanged(selIndex);
         }
        
         // Delete all shapes within the layer at the selected index.
         function DeleteAllShapes()
         {
            layer = map.GetShapeLayerByIndex(selIndex);
            layer.DeleteAllShapes();
            IndexChanged(selIndex);
         }
        
         // Delete the specified shape within the specified layer.
         function DeleteOneShape(shapeIdx, layerIdx)
         {
            if (shapeIdx != null && layerIdx != null)
            {
               try
               {
                  layer = map.GetShapeLayerByIndex(layerIdx);
                  shape = layer.GetShapeByIndex(shapeIdx);
                  layer.DeleteShape(shape);
                  IndexChanged(selIndex);
               }
               catch(e)
               {
                  alert(e.message);
               }
            }
            else
            {
               alert("The specified shape, or layer, does not exist.");
            }
         }
        
         // Update hyperlinks when the index selection changes, and shapes are added/removed.
         function IndexChanged(index)
         {
            selIndex = index;
            layer = map.GetShapeLayerByIndex(index);
            count = layer.GetShapeCount();
            
            var links = "<a href='#' id='HideLayer' onclick='HideLayer()'>Click to hide " + 
               layer.GetTitle() + "</a><br />";
            
            links += "<a href='#' id='ShowLayer' onclick='ShowLayer()'>Click to show " + 
               layer.GetTitle() + "</a><br />";
            
            links += "<a href='#' id='HideAllLayers' onclick='HideAllLayers()'>" + 
               "Click to hide all layers</a><br />";
  
            links += "<a href='#' id='ShowAllLayers' onclick='ShowAllLayers()'>" + 
               "Click to show all layers</a><br />";
        
            links += "<a href='#' id='AddShapeToLayer' onclick='AddShapeToLayer()'>" + 
               "Click to add a shape to the center of " + layer.GetTitle() + "</a><br />";
            
            links += "<a href='#' id='DeleteAllShapes' onclick='DeleteAllShapes()'>" + 
               "Click to delete all shapes from " + layer.GetTitle() + "</a><br />";
            
            links += "Click to delete a shape: ";
            
            for (var i = 0; i < count; i++)
            {
               shape = layer.GetShapeByIndex(i);
               shapeID = shape.GetID();
               links += "<a href='#' id='DeleteOneShape' onclick='DeleteOneShape(" + i +  
                  ", " + selIndex + ")'>" + shapeID + "</a> | ";
            }              
            
            divLinks.innerHTML = links;
         }
        
         // Adjust the map view when a shape is added.
         function AdjustView()
         {
            // Click and drag the map a bit, and add a pushpin to the center
            // to see VEGetBoundingRectangle in action.
            layer = map.GetShapeLayerByIndex(selIndex);
            rect = layer.GetBoundingRectangle();
            count = layer.GetShapeCount();
            map.SetMapView(rect);

            if (count <= 1)
            {
               map.SetZoomLevel(7);
            }
         }
      </script>
   </head>
   <body onload="GetMap();" style="font-family:Arial">
      <div id='myMap' style="position:relative; width:400px; height:400px;"></div>
      Select a Layer by Index:
      <form id="indexRadio">
         0<input name="radio" type="radio" value="0" onclick="IndexChanged(0)" checked="checked"/>&nbsp;
         1<input name="radio" type="radio" value="1" onclick="IndexChanged(1)"/>&nbsp;
         2<input name="radio" type="radio" value="2" onclick="IndexChanged(2)"/>&nbsp;
         3<input name="radio" type="radio" value="3" onclick="IndexChanged(3)"/>&nbsp;
      </form>
      <div id="divLinks"></div>  
      <div id="divShapes"></div>      
      <div id="divInfo"></div>
   </body>
</html>

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