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/*
Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
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");
/*=====
dojo.declare("dojo.dnd.__TimedMoveableArgs", [dojo.dnd.__MoveableArgs], {
// timeout: Number
// delay move by this number of ms,
// accumulating position changes during the timeout
timeout: 0
});
=====*/
(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 that makes a node moveable with a timer
// node: Node||String
// a node (or node's id) to be moved
// params: dojo.dnd.__TimedMoveableArgs
// object with additional parameters.
// 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);
}
}
});
})();
}
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