- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/gfx/Moveable.js
dojo.provide("dojox.gfx.Moveable");
dojo.require("dojox.gfx.Mover");
dojo.declare("dojox.gfx.Moveable", null, {
constructor: function(shape, params){
// summary: an object, which makes a shape moveable
// shape: dojox.gfx.Shape: a shape object to be moved
// params: Object: an optional object with additional parameters;
// following parameters are recognized:
// delay: Number: delay move by this number of pixels
// mover: Object: a constructor of custom Mover
this.shape = shape;
this.delay = (params && params.delay > 0) ? params.delay : 0;
this.mover = (params && params.mover) ? params.mover : dojox.gfx.Mover;
this.events = [
this.shape.connect("onmousedown", this, "onMouseDown"),
// cancel text selection and text dragging
//dojo.connect(this.handle, "ondragstart", dojo, "stopEvent"),
//dojo.connect(this.handle, "onselectstart", dojo, "stopEvent")
];
},
// methods
destroy: function(){
// summary: stops watching for possible move, deletes all references, so the object can be garbage-collected
dojo.forEach(this.events, this.shape.disconnect, this.shape);
this.events = this.shape = null;
},
// mouse event processors
onMouseDown: function(e){
// summary: event processor for onmousedown, creates a Mover for the shape
// e: Event: mouse event
if(this.delay){
this.events.push(this.shape.connect("onmousemove", this, "onMouseMove"));
this.events.push(this.shape.connect("onmouseup", this, "onMouseUp"));
this._lastX = e.clientX;
this._lastY = e.clientY;
}else{
new this.mover(this.shape, e, this);
}
dojo.stopEvent(e);
},
onMouseMove: function(e){
// summary: event processor for onmousemove, used only for delayed drags
// e: Event: mouse event
if(Math.abs(e.clientX - this._lastX) > this.delay || Math.abs(e.clientY - this._lastY) > this.delay){
this.onMouseUp(e);
new this.mover(this.shape, e, this);
}
dojo.stopEvent(e);
},
onMouseUp: function(e){
// summary: event processor for onmouseup, used only for delayed delayed drags
// e: Event: mouse event
this.shape.disconnect(this.events.pop());
this.shape.disconnect(this.events.pop());
},
// local events
onMoveStart: function(/* dojox.gfx.Mover */ mover){
// summary: called before every move operation
dojo.publish("/gfx/move/start", [mover]);
dojo.addClass(dojo.body(), "dojoMove");
},
onMoveStop: function(/* dojox.gfx.Mover */ mover){
// summary: called after every move operation
dojo.publish("/gfx/move/stop", [mover]);
dojo.removeClass(dojo.body(), "dojoMove");
},
onFirstMove: function(/* dojox.gfx.Mover */ mover){
// summary: called during the very first move notification,
// can be used to initialize coordinates, can be overwritten.
// default implementation does nothing
},
onMove: function(/* dojox.gfx.Mover */ mover, /* Object */ shift){
// summary: called during every move notification,
// should actually move the node, can be overwritten.
this.onMoving(mover, shift);
this.shape.applyLeftTransform(shift);
this.onMoved(mover, shift);
},
onMoving: function(/* dojox.gfx.Mover */ mover, /* Object */ shift){
// summary: called before every incremental move,
// can be overwritten.
// default implementation does nothing
},
onMoved: function(/* dojox.gfx.Mover */ mover, /* Object */ shift){
// summary: called after every incremental move,
// can be overwritten.
// default implementation does nothing
}
});
