65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
define("dojo/dnd/TimedMoveable", ["../_base/declare", "./Moveable" /*=====, "./Mover" =====*/], function(declare, Moveable /*=====, Mover =====*/){
|
|
// module:
|
|
// dojo/dnd/TimedMoveable
|
|
|
|
/*=====
|
|
var __TimedMoveableArgs = declare([Moveable.__MoveableArgs], {
|
|
// timeout: Number
|
|
// delay move by this number of ms,
|
|
// accumulating position changes during the timeout
|
|
timeout: 0
|
|
});
|
|
=====*/
|
|
|
|
// precalculate long expressions
|
|
var oldOnMove = Moveable.prototype.onMove;
|
|
|
|
return declare("dojo.dnd.TimedMoveable", 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: __TimedMoveableArgs
|
|
// object with additional parameters.
|
|
|
|
// sanitize parameters
|
|
if(!params){ params = {}; }
|
|
if(params.timeout && typeof params.timeout == "number" && params.timeout >= 0){
|
|
this.timeout = params.timeout;
|
|
}
|
|
},
|
|
|
|
onMoveStop: function(/*Mover*/ mover){
|
|
if(mover._timer){
|
|
// stop timer
|
|
clearTimeout(mover._timer);
|
|
// reflect the last received position
|
|
oldOnMove.call(this, mover, mover._leftTop);
|
|
}
|
|
Moveable.prototype.onMoveStop.apply(this, arguments);
|
|
},
|
|
onMove: function(/*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);
|
|
}
|
|
}
|
|
});
|
|
});
|