Changeset 2548

Timestamp:

03/08/07 17:29:10 (2 years ago)

Author:

sderle

Message:

Calculate new center for mouse wheel zooming. Fixes #341.

Files:

• sandbox/vector-2.4/lib/OpenLayers/Control/MouseDefaults.js (modified) (1 diff)

sandbox/vector-2.4/lib/OpenLayers/Control/MouseDefaults.js

@@ -100 +100 @@
-    },
-
+    zoomWithWheel: function (evt, direction) {
+        var mouse = this.map.getLonLatFromPixel(evt.xy);
+        var center = this.map.getCenter();
+        var resolution = this.map.getResolution();
+        var mouseToCenter = new OpenLayers.Pixel((mouse.lon - center.lon) / resolution,
+                                                 (mouse.lat - center.lat) / resolution);
+        var nextZoom = this.map.getZoom() + direction;
+        var nextResolution = this.map.baseLayer.resolutions[nextZoom];
+        this.map.setCenter(
+            new OpenLayers.LonLat(center.lon + (mouseToCenter.x * nextResolution),
+                                  center.lat + (mouseToCenter.y * nextResolution)),
+            nextZoom); 
+    },
+
-    /** User spun scroll wheel up
-     * 
-     */
-    wheelUp: function(evt) {
-
-
+
-    },
-
-    /** User spun scroll wheel down
-     * 
-     */
-    wheelDown: function(evt) {
-
-
+
-    },
-