Changeset 6961

Timestamp:

04/17/08 19:41:40 (9 months ago)

Author:

edgemaster

Message:

* Add example of using multiple projections on one map
* Also attempt to adjust resolution properties of the Vector layer so that it will display as intended

Files:

• sandbox/edgemaster/openlayers/examples/multiple-projections.html (added)
• sandbox/edgemaster/openlayers/lib/OpenLayers/Layer/Vector.js (modified) (3 diffs)
• sandbox/edgemaster/openlayers/lib/OpenLayers/Map.js (modified) (2 diffs)

sandbox/edgemaster/openlayers/lib/OpenLayers/Layer/Vector.js

@@ -494 +494 @@
-    },
-    
-
-
+
+
+
+
+
+
-     *
-     * Parameters: 
@@ -502 +506 @@
-     *
-     * Returns:
-Markers
+Vector
-     */
-    transform: function(source, dest) {
@@ -509 +513 @@
-            feature.geometry.transform(source, dest);
-        }
+        if(this.maxExtent != null) {
+            this.maxExtent.transform(source, dest);
+        }
+        this.projection = dest;
-        this.redraw();
-        return this;
+    },
+    
+    /**
+     * Method: adjustResolutions
+     * Attempts to adjust resolution options to that of a new base layer if
+     * originally copied from a base layer or the map object.
+     *
+     * Parameters:
+     * layer - {<OpenLayers.Layer>} Layer to copy new resolution options from
+     */
+    adjustResolutions: function(layer) {
+        // These are the relevant options which are used for comparing
+        //  resolutions information.
+        // (copied from OpenLayers.Layer.initResolutions())
+        var props = new Array(
+            'projection', 'units',
+            'scales', 'resolutions',
+            'maxScale', 'minScale', 
+            'maxResolution', 'minResolution',
+            'minExtent', 'maxExtent',
+            'numZoomLevels', 'maxZoomLevel'
+        );
+        
+        // This is probably ugly - we clobber derived properties
+        for(var i=0; i < props.length; i++) {
+            if((this.options[props[i]] === undefined) && (this[props[i]])) {
+                this[props[i]] = layer[props[i]];
+            }
+        }
-    },
-    

sandbox/edgemaster/openlayers/lib/OpenLayers/Map.js

@@ -971 +971 @@
-    setBaseLayer: function(newBaseLayer) {
-        var oldExtent = null;
+        var oldProjection = null;
-        if (this.baseLayer) {
-            oldExtent = this.baseLayer.getExtent();
@@ -1007 +1008 @@
-                    // Convert centre point to new layer projection - so we can
-                    // maintain roughly the same view
-
-
-
+
+
+
+
+
+
+
+
+
-                        vectorLayers = this.getLayersBy("isVector", true);
-                        for (l = 0; l < vectorLayers.length; l++) {
-
+
+
-                        }
-                    }
-
-                    //the new zoom will either come from the old Extent or 
-                                                
+
-                    var newZoom = (oldExtent) 
-                        ? this.getZoomForExtent(oldExtent, true)