[mapguide-commits] r7474 - sandbox/jng/queryfeatures_v2/Web/src/viewerfiles

[svn_mapguide at osgeo.org]

Author: jng
Date: 2013-05-03 15:41:29 -0700 (Fri, 03 May 2013)
New Revision: 7474

Modified:
   sandbox/jng/queryfeatures_v2/Web/src/viewerfiles/ajaxmappane.templ
Log:
AJAX Viewer updates:
 - Number crunch the selection bounding box client-side
 - Use the crunched bounding box for ZoomSelection(). This eliminates *yet another* request to the mapagent (GETFEATURESETENVELOPE)

Modified: sandbox/jng/queryfeatures_v2/Web/src/viewerfiles/ajaxmappane.templ
===================================================================
--- sandbox/jng/queryfeatures_v2/Web/src/viewerfiles/ajaxmappane.templ	2013-05-03 22:23:24 UTC (rev 7473)
+++ sandbox/jng/queryfeatures_v2/Web/src/viewerfiles/ajaxmappane.templ	2013-05-03 22:41:29 UTC (rev 7474)
@@ -3241,13 +3241,15 @@
 
     SetSelection("", false);
 
+    selFeatures = {};
+    selBounds = null;
+
     selImg = document.getElementById(msie6minus ? "selImg1div": curSelImg);
     if(selImg)
     {
         selImg.style.visibility = "hidden";
     }
 
-
     parent.OnSelectionChanged();
 }
 
@@ -3264,32 +3266,15 @@
 
 function ZoomSelection()
 {
-    if(selection.count == 0)
+    if(selection.count == 0 || !selBounds)
         return;
-
-    var reqParams = "OPERATION=GETFEATURESETENVELOPE&VERSION=1.0.0&SESSION=" + sessionId + "&MAPNAME=" + encodeURIComponent(mapName) + "&SEQ=" + Math.random();
-    reqParams += "&FEATURESET=" + encodeURIComponent(selectionToXml()) + "&CLIENTAGENT=" + encodeURIComponent(clientAgent);
-
-    dr = CreateRequestHandler();
-    dr.open("POST", webAgent, false);
-    dr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-    dr.send(reqParams);
-   
-    if(dr.status == 200)
-    {
-        var env = ParseEnvelope(dr.responseXML.documentElement);
-        if(env != null)
-        {
-            var mcsW = env.upperRight.X - env.lowerLeft.X;
-            var mcsH = env.upperRight.Y - env.lowerLeft.Y;
-            var centerX = env.lowerLeft.X + mcsW / 2;
-            var centerY = env.lowerLeft.Y + mcsH / 2;
-            var scale = CalculateScale1(mcsW*2, mcsH*2, mapDevW, mapDevH);
-            GotoView(centerX, centerY, scale, true, true);
-        }
-    }
-    else
-        RequestFailed(dr.responseText);
+        
+    var mcsW = selBounds.maxx - selBounds.minx;
+    var mcsH = selBounds.maxy - selBounds.miny;
+    var centerX = selBounds.minx + mcsW / 2;
+    var centerY = selBounds.miny + mcsH / 2;
+    var scale = CalculateScale1(mcsW*2, mcsH*2, mapDevW, mapDevH);
+    GotoView(centerX, centerY, scale, true, true);
 }
 
 function ParseEnvelope(xmlRoot)
@@ -4194,7 +4179,7 @@
             else if (name == "_MgFeatureBoundingBox")
             {
                 var values = value.split(" ");
-                feat.zoom = { minx: values[0], miny: values[1], maxx: values[2], maxy: values[3] };
+                feat.zoom = { minx: parseFloat(values[0]), miny: parseFloat(values[1]), maxx: parseFloat(values[2]), maxy: parseFloat(values[3]) };
             }
             else
             {
@@ -4235,7 +4220,7 @@
     selBounds = null;
     if (!resp)
         return;
-        
+
     var selLayers = document.getElementById("selLayers");
     selLayers.length = 0;
     GetPropertyCtrl().Clear();
@@ -4254,6 +4239,26 @@
  
         //Associates the selected features on layer
         selFeatures[layerName] = resp[layerName];
+        
+        //Update selection bounding box
+        for (var i = 0; i < resp[layerName].length; i++)
+        {
+            var feat = resp[layerName][i];
+            if (feat.zoom) {
+                if (!selBounds) {
+                    selBounds = { minx: feat.zoom.minx, miny: feat.zoom.miny, maxx: feat.zoom.maxx, maxy: feat.zoom.maxy };
+                } else {
+                    if (feat.zoom.minx < selBounds.minx)
+                        selBounds.minx = feat.zoom.minx;
+                    if (feat.zoom.miny < selBounds.miny)
+                        selBounds.miny = feat.zoom.miny;
+                    if (feat.zoom.maxx > selBounds.maxx)
+                        selBounds.maxx = feat.zoom.maxx;
+                    if (feat.zoom.maxy > selBounds.maxy)
+                        selBounds.maxy = feat.zoom.maxy;
+                }
+            }
+        }
     }
     
     if (selLayers.length > 0)