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/*
Copyright (c) 2004-2011, 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.Moveable"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojo.dnd.Moveable"] = true;
dojo.provide("dojo.dnd.Moveable");
dojo.require("dojo.dnd.Mover");
/*=====
dojo.declare("dojo.dnd.__MoveableArgs", [], {
// handle: Node||String
// A node (or node's id), which is used as a mouse handle.
// If omitted, the node itself is used as a handle.
handle: null,
// delay: Number
// delay move by this number of pixels
delay: 0,
// skip: Boolean
// skip move of form elements
skip: false,
// mover: Object
// a constructor of custom Mover
mover: dojo.dnd.Mover
});
=====*/
dojo.declare("dojo.dnd.Moveable", null, {
// object attributes (for markup)
handle: "",
delay: 0,
skip: false,
constructor: function(node, params){
// summary:
// an object, which makes a node moveable
// node: Node
// a node (or node's id) to be moved
// params: dojo.dnd.__MoveableArgs?
// optional parameters
this.node = dojo.byId(node);
if(!params){ params = {}; }
this.handle = params.handle ? dojo.byId(params.handle) : null;
if(!this.handle){ this.handle = this.node; }
this.delay = params.delay > 0 ? params.delay : 0;
this.skip = params.skip;
this.mover = params.mover ? params.mover : dojo.dnd.Mover;
this.events = [
dojo.connect(this.handle, "onmousedown", this, "onMouseDown"),
dojo.connect(this.handle, "ontouchstart", this, "onMouseDown"),
// cancel text selection and text dragging
dojo.connect(this.handle, "ondragstart", this, "onSelectStart"),
dojo.connect(this.handle, "onselectstart", this, "onSelectStart")
];
},
// markup methods
markupFactory: function(params, node){
return new dojo.dnd.Moveable(node, params);
},
// methods
destroy: function(){
// summary:
// stops watching for possible move, deletes all references, so the object can be garbage-collected
dojo.forEach(this.events, dojo.disconnect);
this.events = this.node = this.handle = null;
},
// mouse event processors
onMouseDown: function(e){
// summary:
// event processor for onmousedown/ontouchstart, creates a Mover for the node
// e: Event
// mouse/touch event
if(this.skip && dojo.dnd.isFormElement(e)){ return; }
if(this.delay){
this.events.push(
dojo.connect(this.handle, "onmousemove", this, "onMouseMove"),
dojo.connect(this.handle, "ontouchmove", this, "onMouseMove"),
dojo.connect(this.handle, "onmouseup", this, "onMouseUp"),
dojo.connect(this.handle, "ontouchend", this, "onMouseUp")
);
var pos = e.touches ? e.touches[0] : e;
this._lastX = pos.pageX;
this._lastY = pos.pageY;
}else{
this.onDragDetected(e);
}
dojo.stopEvent(e);
},
onMouseMove: function(e){
// summary:
// event processor for onmousemove/ontouchmove, used only for delayed drags
// e: Event
// mouse/touch event
var pos = e.touches ? e.touches[0] : e;
if(Math.abs(pos.pageX - this._lastX) > this.delay || Math.abs(pos.pageY - this._lastY) > this.delay){
this.onMouseUp(e);
this.onDragDetected(e);
}
dojo.stopEvent(e);
},
onMouseUp: function(e){
// summary:
// event processor for onmouseup, used only for delayed drags
// e: Event
// mouse event
for(var i = 0; i < 2; ++i){
dojo.disconnect(this.events.pop());
}
dojo.stopEvent(e);
},
onSelectStart: function(e){
// summary:
// event processor for onselectevent and ondragevent
// e: Event
// mouse event
if(!this.skip || !dojo.dnd.isFormElement(e)){
dojo.stopEvent(e);
}
},
// local events
onDragDetected: function(/* Event */ e){
// summary:
// called when the drag is detected;
// responsible for creation of the mover
new this.mover(this.node, e, this);
},
onMoveStart: function(/* dojo.dnd.Mover */ mover){
// summary:
// called before every move operation
dojo.publish("/dnd/move/start", [mover]);
dojo.addClass(dojo.body(), "dojoMove");
dojo.addClass(this.node, "dojoMoveItem");
},
onMoveStop: function(/* dojo.dnd.Mover */ mover){
// summary:
// called after every move operation
dojo.publish("/dnd/move/stop", [mover]);
dojo.removeClass(dojo.body(), "dojoMove");
dojo.removeClass(this.node, "dojoMoveItem");
},
onFirstMove: function(/* dojo.dnd.Mover */ mover, /* Event */ e){
// summary:
// called during the very first move notification;
// can be used to initialize coordinates, can be overwritten.
// default implementation does nothing
},
onMove: function(/* dojo.dnd.Mover */ mover, /* Object */ leftTop, /* Event */ e){
// summary:
// called during every move notification;
// should actually move the node; can be overwritten.
this.onMoving(mover, leftTop);
var s = mover.node.style;
s.left = leftTop.l + "px";
s.top = leftTop.t + "px";
this.onMoved(mover, leftTop);
},
onMoving: function(/* dojo.dnd.Mover */ mover, /* Object */ leftTop){
// summary:
// called before every incremental move; can be overwritten.
// default implementation does nothing
},
onMoved: function(/* dojo.dnd.Mover */ mover, /* Object */ leftTop){
// summary:
// called after every incremental move; can be overwritten.
// default implementation does nothing
}
});
}
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