openlayers madness

[rails.git] / public / lib / OpenLayers / Control / MouseDefaults.js

diff --git a/public/lib/OpenLayers/Control/MouseDefaults.js b/public/lib/OpenLayers/Control/MouseDefaults.js
new file mode 100644 (file)
index 0000000..3ae7edd
--- /dev/null
+++ b/public/lib/OpenLayers/Control/MouseDefaults.js
@@ -0,0 +1,130 @@
+/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
+ * See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
+ * text of the license. */
+// @require: OpenLayers/Control.js
+OpenLayers.Control.MouseDefaults = Class.create();
+OpenLayers.Control.MouseDefaults.prototype = 
+  Object.extend( new OpenLayers.Control(), {
+
+    performedDrag: false,
+
+    initialize: function() {
+        OpenLayers.Control.prototype.initialize.apply(this, arguments);
+    },
+    
+    draw: function() {
+        this.map.events.register( "click", this, this.defaultClick );
+        this.map.events.register( "dblclick", this, this.defaultDblClick );
+        this.map.events.register( "mousedown", this, this.defaultMouseDown );
+        this.map.events.register( "mouseup", this, this.defaultMouseUp );
+        this.map.events.register( "mousemove", this, this.defaultMouseMove );
+        this.map.events.register( "mouseout", this, this.defaultMouseOut );
+    },
+
+    defaultClick: function (evt) {
+        if (!Event.isLeftClick(evt)) return;
+        var notAfterDrag = !this.performedDrag;
+        this.performedDrag = false;
+        return notAfterDrag;
+    },
+
+    /**
+    * @param {Event} evt
+    */
+    defaultDblClick: function (evt) {
+        var newCenter = this.map.getLonLatFromViewPortPx( evt.xy ); 
+        this.map.setCenter(newCenter, this.map.zoom + 1);
+    },
+
+    /**
+    * @param {Event} evt
+    */
+    defaultMouseDown: function (evt) {
+        if (!Event.isLeftClick(evt)) return;
+        this.mouseDragStart = evt.xy.copyOf();
+        this.performedDrag  = false;
+        if (evt.shiftKey) {
+            this.map.div.style.cursor = "crosshair";
+            this.zoomBox = OpenLayers.Util.createDiv('zoomBox',
+                                                     this.mouseDragStart,
+                                                     null,
+                                                     null,
+                                                     "absolute",
+                                                     "2px solid red");
+            this.zoomBox.style.backgroundColor = "white";
+            this.zoomBox.style.filter = "alpha(opacity=50)"; // IE
+            this.zoomBox.style.opacity = "0.50";
+            this.zoomBox.style.zIndex = this.map.Z_INDEX_BASE["Popup"] - 1;
+            this.map.viewPortDiv.appendChild(this.zoomBox);
+        }
+        document.onselectstart=function() { return false; }
+        Event.stop(evt);
+    },
+
+    /**
+    * @param {Event} evt
+    */
+    defaultMouseMove: function (evt) {
+        if (this.mouseDragStart != null) {
+            if (this.zoomBox) {
+                var deltaX = Math.abs(this.mouseDragStart.x - evt.xy.x);
+                var deltaY = Math.abs(this.mouseDragStart.y - evt.xy.y);
+                this.zoomBox.style.width = deltaX+"px";
+                this.zoomBox.style.height = deltaY+"px";
+                if (evt.xy.x < this.mouseDragStart.x) {
+                    this.zoomBox.style.left = evt.xy.x+"px";
+                }
+                if (evt.xy.y < this.mouseDragStart.y) {
+                    this.zoomBox.style.top = evt.xy.y+"px";
+                }
+            } else {
+                var deltaX = this.mouseDragStart.x - evt.xy.x;
+                var deltaY = this.mouseDragStart.y - evt.xy.y;
+                var size = this.map.getSize();
+                var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
+                                                 size.h / 2 + deltaY);
+                var newCenter = this.map.getLonLatFromViewPortPx( newXY ); 
+                this.map.setCenter(newCenter, null, true);
+                this.mouseDragStart = evt.xy.copyOf();
+                this.map.div.style.cursor = "move";
+            }
+            this.performedDrag = true;
+        }
+    },
+
+    /**
+    * @param {Event} evt
+    */
+    defaultMouseUp: function (evt) {
+        if (!Event.isLeftClick(evt)) return;
+        if (this.zoomBox) {
+            var start = this.map.getLonLatFromViewPortPx( this.mouseDragStart ); 
+            var end = this.map.getLonLatFromViewPortPx( evt.xy );
+            var top = Math.max(start.lat, end.lat);
+            var bottom = Math.min(start.lat, end.lat);
+            var left = Math.min(start.lon, end.lon);
+            var right = Math.max(start.lon, end.lon);
+            var bounds = new OpenLayers.Bounds(left, bottom, right, top);
+            var zoom = this.map.getZoomForExtent(bounds);
+            this.map.setCenter(new OpenLayers.LonLat(
+              (start.lon + end.lon) / 2,
+              (start.lat + end.lat) / 2
+             ), zoom);
+            this.map.viewPortDiv.removeChild(document.getElementById("zoomBox"));
+            this.zoomBox = null;
+        } else {
+            this.map.setCenter(this.map.center);
+        }
+        document.onselectstart=null;
+        this.mouseDragStart = null;
+        this.map.div.style.cursor = "default";
+    },
+
+    defaultMouseOut: function (evt) {
+        if (this.mouseDragStart != null
+            && OpenLayers.Util.mouseLeft(evt, this.map.div)) {
+                this.defaultMouseUp(evt);
+        }
+    }
+});
+