Changeset 147

Timestamp:

Oct 23, 2006, 9:14:35 PM (14 years ago)

Author:

David Sheldon

Message:

Woo, markers now really fast.

File:

• trunk/npemap.org.uk/static/tiles/mapTiles.js (modified) (4 diffs)

trunk/npemap.org.uk/static/tiles/mapTiles.js

@@ -94 +94 @@
       var northing = trimSixDigits(Math.round((baseNorthing +tileYratio)*1000));
 
-      YAHOO.util.Dom.setXY(markerElement, [(x-4), (y-11)]);
+      YAHOO.util.Dom.setXY(markerElement, [(x-markerXOffset), (y-markerYOffset)]);
       markerElement.style.visibility = 'visible';
       
@@ -263 +263 @@
 
 function drawExisting() {
-  bottomLeft = YAHOO.util.Dom.getXY('element1.1');
+  
   var url = "../../cgi/get-postcodes.fcgi";
   url += "?mineasting=" + minEasting + "000&maxeasting="  + maxEasting + "000&minnorthing=" + minNorthing + "000&maxnorthing=" + maxNorthing+"000";
@@ -274 +274 @@
   spinnerElement.className = 'loading';
   spinnerElement.innerHtml = 'Loading...';
+  findMarkerOffsets();
   
   YAHOO.util.Connect.asyncRequest('GET', url, callback);  
+
+}
+
+function findMarkerOffsets() {
+  newMarker = document.createElement('div');
+  newMarker.style.position = 'absolute';
+  mainPageElement.appendChild(newMarker);
+
+  bottomLeft = YAHOO.util.Dom.getXY('element1.1');
+  var bottom = bottomLeft[1] + tileHeight;
+  YAHOO.util.Dom.setXY(newMarker, [bottomLeft[0] - markerXOffset, bottom - markerYOffset]);
+
+  markerLeft = parseInt(newMarker.style.left);
+  markerTop= parseInt(newMarker.style.top);
+  mainPageElement.removeChild(newMarker);
 }
 
@@ -328 +344 @@
   var x = ((easting / 1000) - minEasting) * tileWidth;
   var y = ((northing / 1000) - minNorthing) * tileHeight;
-  var bottom = bottomLeft[1] + tileHeight;
-
-  YAHOO.util.Dom.setXY(newMarker, [bottomLeft[0]+x-markerXOffset, bottom- (y+markerYOffset)]);
+
+//  YAHOO.util.Dom.setXY(newMarker, [bottomLeft[0]+x-markerXOffset, bottom- (y+markerYOffset)]);
+  setMarkerXY(newMarker, x, y);
+}
+
+function setMarkerXY(marker, x, y) {
+  marker.style.left = Math.round(markerLeft + x) ;
+  marker.style.top = Math.round(markerTop - y);
+  
 }