Merge branch 'vector-ratio' (closes #113)

lib/OpenLayers/Layer/Vector.js

@@ -218,6 +218,12 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
      */
     drawn: false,
     
+    /** 
+     * APIProperty: ratio
+     * {Float} This specifies the ratio of the size of the visiblity of the Vector Layer features to the size of the map.
+     */   
+    ratio: 1,
+
     /**
      * Constructor: OpenLayers.Layer.Vector
      * Create a new vector layer
@@ -365,7 +371,7 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
     displayError: function() {
         if (this.reportError) {
             OpenLayers.Console.userError(OpenLayers.i18n("browserNotSupported", 
-                                     {'renderers':this.renderers.join("\n")}));
+                                     {renderers: this. renderers.join('\n')}));
         }    
     },
 
@@ -386,7 +392,11 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
             this.map.removeLayer(this);
         } else {
             this.renderer.map = this.map;
-            this.renderer.setSize(this.map.getSize());
+
+            var newSize = this.map.getSize();
+            newSize.w = newSize.w * this.ratio;
+            newSize.h = newSize.h * this.ratio;
+            this.renderer.setSize(newSize);
         }
     },
 
@@ -435,7 +445,11 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
      */
     onMapResize: function() {
         OpenLayers.Layer.prototype.onMapResize.apply(this, arguments);
-        this.renderer.setSize(this.map.getSize());
+        
+        var newSize = this.map.getSize();
+        newSize.w = newSize.w * this.ratio;
+        newSize.h = newSize.h * this.ratio;
+        this.renderer.setSize(newSize);
     },
 
     /**
@@ -463,14 +477,25 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
             var coordSysUnchanged = true;
 
             if (!dragging) {
-                this.renderer.root.style.visibility = "hidden";
+                this.renderer.root.style.visibility = 'hidden';
 
-                this.div.style.left = -parseInt(this.map.layerContainerDiv.style.left) + "px";
+                var viewSize = this.map.getSize(),
-                this.div.style.top = -parseInt(this.map.layerContainerDiv.style.top) + "px";
+                    viewWidth = viewSize.w,
-                var extent = this.map.getExtent();
+                    viewHeight = viewSize.h,
+                    offsetLeft = (viewWidth / 2 * this.ratio) - viewWidth / 2,
+                    offsetTop = (viewHeight / 2 * this.ratio) - viewHeight / 2;
+                offsetLeft += parseInt(this.map.layerContainerDiv.style.left, 10);
+                offsetLeft = -Math.round(offsetLeft);
+                offsetTop += parseInt(this.map.layerContainerDiv.style.top, 10);
+                offsetTop = -Math.round(offsetTop);
+    	
+                this.div.style.left = offsetLeft + 'px';
+                this.div.style.top = offsetTop + 'px';
+		
+                var extent = this.map.getExtent().scale(this.ratio);
                 coordSysUnchanged = this.renderer.setExtent(extent, zoomChanged);
 
-                this.renderer.root.style.visibility = "visible";
+                this.renderer.root.style.visibility = 'visible';
 
                 // Force a reflow on gecko based browsers to prevent jump/flicker.
                 // This seems to happen on only certain configurations; it was originally

lib/OpenLayers/Renderer.js

@@ -139,7 +139,9 @@ OpenLayers.Renderer = OpenLayers.Class({
     setExtent: function(extent, resolutionChanged) {
         this.extent = extent.clone();
         if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
-            this.extent = extent.wrapDateLine(this.map.getMaxExtent());
+            var ratio = extent.getWidth() / this.map.getExtent().getWidth(),
+                extent = extent.scale(1 / ratio);
+            this.extent = extent.wrapDateLine(this.map.getMaxExtent()).scale(ratio);
         }
         if (resolutionChanged) {
             this.resolution = null;

lib/OpenLayers/Renderer/Elements.js

@@ -498,8 +498,9 @@ OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
         var coordSysUnchanged = OpenLayers.Renderer.prototype.setExtent.apply(this, arguments);
         var resolution = this.getResolution();
         if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
-            coordSysUnchanged = this.featureDx === 0;
             var rightOfDateLine,
+                ratio = extent.getWidth() / this.map.getExtent().getWidth(),
+                extent = extent.scale(1 / ratio),
                 world = this.map.getMaxExtent();
             if (world.right > extent.left && world.right < extent.right) {
                 rightOfDateLine = true;

tests/Renderer/Elements.html

@@ -614,6 +614,9 @@
             getMaxExtent: function() {
                 return new OpenLayers.Bounds(-180,-90,180,90);
             },
+            getExtent: function() {
+                return r.extent;
+            },
             getResolution: function() {
                 return resolution;
             },