98 lines
3.4 KiB
JavaScript
98 lines
3.4 KiB
JavaScript
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dojo.provide("dojox.gfx.Moveable");
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dojo.require("dojox.gfx.Mover");
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dojo.declare("dojox.gfx.Moveable", null, {
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constructor: function(shape, params){
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// summary: an object, which makes a shape moveable
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// shape: dojox.gfx.Shape: a shape object to be moved
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// params: Object: an optional object with additional parameters;
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// following parameters are recognized:
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// delay: Number: delay move by this number of pixels
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// mover: Object: a constructor of custom Mover
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this.shape = shape;
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this.delay = (params && params.delay > 0) ? params.delay : 0;
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this.mover = (params && params.mover) ? params.mover : dojox.gfx.Mover;
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this.events = [
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this.shape.connect("onmousedown", this, "onMouseDown")
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// cancel text selection and text dragging
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//, dojo.connect(this.handle, "ondragstart", dojo, "stopEvent")
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//, dojo.connect(this.handle, "onselectstart", dojo, "stopEvent")
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];
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},
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// methods
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destroy: function(){
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// summary: stops watching for possible move, deletes all references, so the object can be garbage-collected
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dojo.forEach(this.events, this.shape.disconnect, this.shape);
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this.events = this.shape = null;
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},
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// mouse event processors
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onMouseDown: function(e){
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// summary: event processor for onmousedown, creates a Mover for the shape
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// e: Event: mouse event
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if(this.delay){
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this.events.push(this.shape.connect("onmousemove", this, "onMouseMove"));
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this.events.push(this.shape.connect("onmouseup", this, "onMouseUp"));
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this._lastX = e.clientX;
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this._lastY = e.clientY;
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}else{
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new this.mover(this.shape, e, this);
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}
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dojo.stopEvent(e);
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},
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onMouseMove: function(e){
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// summary: event processor for onmousemove, used only for delayed drags
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// e: Event: mouse event
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if(Math.abs(e.clientX - this._lastX) > this.delay || Math.abs(e.clientY - this._lastY) > this.delay){
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this.onMouseUp(e);
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new this.mover(this.shape, e, this);
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}
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dojo.stopEvent(e);
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},
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onMouseUp: function(e){
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// summary: event processor for onmouseup, used only for delayed delayed drags
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// e: Event: mouse event
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this.shape.disconnect(this.events.pop());
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this.shape.disconnect(this.events.pop());
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},
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// local events
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onMoveStart: function(/* dojox.gfx.Mover */ mover){
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// summary: called before every move operation
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dojo.publish("/gfx/move/start", [mover]);
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dojo.addClass(dojo.body(), "dojoMove");
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},
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onMoveStop: function(/* dojox.gfx.Mover */ mover){
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// summary: called after every move operation
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dojo.publish("/gfx/move/stop", [mover]);
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dojo.removeClass(dojo.body(), "dojoMove");
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},
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onFirstMove: function(/* dojox.gfx.Mover */ mover){
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// summary: called during the very first move notification,
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// can be used to initialize coordinates, can be overwritten.
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// default implementation does nothing
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},
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onMove: function(/* dojox.gfx.Mover */ mover, /* Object */ shift){
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// summary: called during every move notification,
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// should actually move the node, can be overwritten.
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this.onMoving(mover, shift);
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this.shape.applyLeftTransform(shift);
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this.onMoved(mover, shift);
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},
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onMoving: function(/* dojox.gfx.Mover */ mover, /* Object */ shift){
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// summary: called before every incremental move,
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// can be overwritten.
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// default implementation does nothing
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},
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onMoved: function(/* dojox.gfx.Mover */ mover, /* Object */ shift){
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// summary: called after every incremental move,
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// can be overwritten.
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// default implementation does nothing
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}
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});
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