Subversion Repositories Applications.papyrus

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.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: Object: an optional object with additional parameters;
                //      following parameters are recognized:
                //              handle: Node: a node (or node's id), which is used as a mouse handle
                //                      if omitted, the node itself is used as a handle
                //              delay: Number: delay move by this number of pixels
                //              skip: Boolean: skip move of form elements
                //              mover: Object: a constructor of custom Mover
                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"),
                        // 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, creates a Mover for the node
                // e: Event: mouse event
                if(this.skip && dojo.dnd.isFormElement(e)){ return; }
                if(this.delay){
                        this.events.push(dojo.connect(this.handle, "onmousemove", this, "onMouseMove"));
                        this.events.push(dojo.connect(this.handle, "onmouseup", this, "onMouseUp"));
                        this._lastX = e.pageX;
                        this._lastY = e.pageY;
                }else{
                        new this.mover(this.node, 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.pageX - this._lastX) > this.delay || Math.abs(e.pageY - this._lastY) > this.delay){
                        this.onMouseUp(e);
                        new this.mover(this.node, e, this);
                }
                dojo.stopEvent(e);
        },
        onMouseUp: function(e){
                // summary: event processor for onmouseup, used only for delayed delayed drags
                // e: Event: mouse event
                dojo.disconnect(this.events.pop());
                dojo.disconnect(this.events.pop());
        },
        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
        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){
                // 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){
                // summary: called during every move notification,
                //      should actually move the node, can be overwritten.
                this.onMoving(mover, leftTop);
                dojo.marginBox(mover.node, leftTop);
                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
        }
});

}