New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 66 insertions, 0 deletions

diff --git a/includes/js/dojo/dnd/TimedMoveable.js b/includes/js/dojo/dnd/TimedMoveable.js
new file mode 100644
index 0000000..4f4fb0b
--- /dev/null
+++ b/includes/js/dojo/dnd/TimedMoveable.js
@@ -0,0 +1,66 @@
+if(!dojo._hasResource["dojo.dnd.TimedMoveable"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.dnd.TimedMoveable"] = true;
+dojo.provide("dojo.dnd.TimedMoveable");
+
+dojo.require("dojo.dnd.Moveable");
+
+(function(){
+	// precalculate long expressions
+	var oldOnMove = dojo.dnd.Moveable.prototype.onMove;
+		
+	dojo.declare("dojo.dnd.TimedMoveable", dojo.dnd.Moveable, {
+		// summary:
+		//	A specialized version of Moveable to support an FPS throttling.
+		//	This class puts an upper restriction on FPS, which may reduce 
+		//	the CPU load. The additional parameter "timeout" regulates
+		//	the delay before actually moving the moveable object.
+		
+		// object attributes (for markup)
+		timeout: 40,	// in ms, 40ms corresponds to 25 fps
+	
+		constructor: function(node, params){
+			// summary: an object, which makes a node moveable with a timer
+			// node: Node: a node (or node's id) to be moved
+			// params: Object: an optional object with additional parameters.
+			//	See dojo.dnd.Moveable for details on general parameters.
+			//	Following parameters are specific for this class:
+			//		timeout: Number: delay move by this number of ms
+			//			accumulating position changes during the timeout
+			
+			// sanitize parameters
+			if(!params){ params = {}; }
+			if(params.timeout && typeof params.timeout == "number" && params.timeout >= 0){
+				this.timeout = params.timeout;
+			}
+		},
+	
+		// markup methods
+		markupFactory: function(params, node){
+			return new dojo.dnd.TimedMoveable(node, params);
+		},
+	
+		onMoveStop: function(/* dojo.dnd.Mover */ mover){
+			if(mover._timer){
+				// stop timer
+				clearTimeout(mover._timer)
+				// reflect the last received position
+				oldOnMove.call(this, mover, mover._leftTop)
+			}
+			dojo.dnd.Moveable.prototype.onMoveStop.apply(this, arguments);
+		},
+		onMove: function(/* dojo.dnd.Mover */ mover, /* Object */ leftTop){
+			mover._leftTop = leftTop;
+			if(!mover._timer){
+				var _t = this;	// to avoid using dojo.hitch()
+				mover._timer = setTimeout(function(){
+					// we don't have any pending requests
+					mover._timer = null;
+					// reflect the last received position
+					oldOnMove.call(_t, mover, mover._leftTop);
+				}, this.timeout);
+			}
+		}
+	});
+})();
+
+}