Changeset 3832

Timestamp:

08/01/07 08:33:01 (1 year ago)

Author:

jachym

Message:

new stretching funtionality of the maps, which are in WGS84 projection. Maps can be streched according to Latitude of their center

Files:

• sandbox/jachym/openlayers/lib/OpenLayers/Layer.js (modified) (3 diffs)
• sandbox/jachym/openlayers/lib/OpenLayers/Layer/Grid.js (modified) (2 diffs)
• sandbox/jachym/openlayers/lib/OpenLayers/Map.js (modified) (2 diffs)

sandbox/jachym/openlayers/lib/OpenLayers/Layer.js

@@ -758 +758 @@
-            var center = this.map.getCenter();
-            if (center) {
-
+
+
+
-        
-                var delta_x = viewPortPx.x - (size.w / 2);
-                var delta_y = viewPortPx.y - (size.h / 2);
+
+                // strech the map  according to lat
+                if (this.map.stretch && (this.map.units == "dd" || this.map.units == "degrees")) {
+                    resy *= this.map.stretchConts;
+                }
-            
-
-
+x
+y
-
-                if (this.wrapDateLine) {
@@ -788 +795 @@
-        var px = null; 
-        if (lonlat != null) {
-
+
+
+
-            var extent = this.map.getExtent();
+
+            // strech the map  according to lat
+            if (this.map.stretch && (this.map.units == "dd" || this.map.units == "degrees")) {
+                 yres*= this.map.stretchConts;
+            }
-            px = new OpenLayers.Pixel(
-resolution
-resolution
+xres
+yres
-                           );    
-        }
@@ -842 +856 @@
-            // Adjust the extent of a bounds in map units by the 
-            // layer's gutter in pixels.
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
-        }
-

sandbox/jachym/openlayers/lib/OpenLayers/Layer/Grid.js

@@ -307 +307 @@
-        var tilelon = resolution * this.tileSize.w;
-        var tilelat = resolution * this.tileSize.h;
+
+        // strech the map  according to lat
+        if (this.map.stretch && (this.map.units == "dd" || this.map.units == "degrees")) {
+            tilelat *= this.map.stretchConts;
+        }
-        
-        var offsetlon = bounds.left - extent.left;
@@ -567 +572 @@
-        var deltaLat = resolution * -deltaY;
-
+        // strech the map  according to lat
+        if (this.map.stretch && (this.map.units == "dd" || this.map.units == "degrees")) {
+            deltaLat *= this.map.stretchConts;
+        }
+
-        var row = (prepend) ? this.grid.pop() : this.grid.shift();
-

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

@@ -230 +230 @@
-     */
-    fallThrough: false,
+
+    /** Should the map be "streched" if units are degrees (assuming EPSG:
+     * 4326 projection) ?
+     *   Default is no.
+     * 
+     * @type boolean 
+     */
+     stretch: false,
+
+    /** This constant should be initialized at the beginning
+     * 
+     * @type Integer 
+     */
+     stretchConts: null,
+
-
-    /**
@@ -956 +971 @@
-            var w_deg = size.w * resolution;
-            var h_deg = size.h * resolution;
+
+            // strech the map  according to lat
+            if (this.stretch && (this.units == "dd" || this.units == "degrees")) {
+                if (!this.stretchConts) { 
+                        this.stretchConts =  Math.cos(center.lat/180*Math.PI);
+                }
+                h_deg *= this.stretchConts;
+            }
-        
-            extent = new OpenLayers.Bounds(center.lon - w_deg / 2,