source: Dev/trunk/src/client/dojox/charting/action2d/Shake.js

define(["dojo/_base/connect", "dojo/_base/declare", "./PlotAction", 
        "dojo/fx", "dojo/fx/easing", "dojox/gfx/matrix", "dojox/gfx/fx"], 
        function(hub, declare, PlotAction, df, dfe, m, gf){

        /*=====
        var __ShakeCtorArgs = {
                        // summary:
                        //              Additional arguments for shaking actions.
                        // duration: Number?
                        //              The amount of time in milliseconds for an animation to last.  Default is 400.
                        // easing: dojo/fx/easing/*?
                        //              An easing object (see dojo.fx.easing) for use in an animation.  The
                        //              default is dojo.fx.easing.backOut.
                        // shift: Number?
                        //              The amount in pixels to shift the pie slice.  Default is 3.
        };
        =====*/

        var DEFAULT_SHIFT = 3;

        return declare("dojox.charting.action2d.Shake", PlotAction, {
                // summary:
                //              Create a shaking action for use on an element in a chart.

                // the data description block for the widget parser
                defaultParams: {
                        duration: 400,  // duration of the action in ms
                        easing:   dfe.backOut,  // easing for the action
                        shiftX:   DEFAULT_SHIFT,        // shift of the element along the X axis
                        shiftY:   DEFAULT_SHIFT         // shift of the element along the Y axis
                },
                optionalParams: {},     // no optional parameters

                constructor: function(chart, plot, kwArgs){
                        // summary:
                        //              Create the shaking action and connect it to the plot.
                        // chart: dojox/charting/Chart
                        //              The chart this action belongs to.
                        // plot: String?
                        //              The plot this action is attached to.  If not passed, "default" is assumed.
                        // kwArgs: __ShakeCtorArgs?
                        //              Optional keyword arguments object for setting parameters.
                        if(!kwArgs){ kwArgs = {}; }
                        this.shiftX = typeof kwArgs.shiftX == "number" ? kwArgs.shiftX : DEFAULT_SHIFT;
                        this.shiftY = typeof kwArgs.shiftY == "number" ? kwArgs.shiftY : DEFAULT_SHIFT;

                        this.connect();
                },

                process: function(o){
                        // summary:
                        //              Process the action on the given object.
                        // o: dojox/gfx/shape.Shape
                        //              The object on which to process the slice moving action.
                        if(!o.shape || !(o.type in this.overOutEvents)){ return; }

                        var runName = o.run.name, index = o.index, vector = [], anim;

                        if(runName in this.anim){
                                anim = this.anim[runName][index];
                        }else{
                                this.anim[runName] = {};
                        }

                        if(anim){
                                anim.action.stop(true);
                        }else{
                                this.anim[runName][index] = anim = {};
                        }

                        var kwArgs = {
                                shape:     o.shape,
                                duration:  this.duration,
                                easing:    this.easing,
                                transform: [
                                        {name: "translate", start: [this.shiftX, this.shiftY], end: [0, 0]},
                                        m.identity
                                ]
                        };
                        if(o.shape){
                                vector.push(gf.animateTransform(kwArgs));
                        }
                        if(o.oultine){
                                kwArgs.shape = o.outline;
                                vector.push(gf.animateTransform(kwArgs));
                        }
                        if(o.shadow){
                                kwArgs.shape = o.shadow;
                                vector.push(gf.animateTransform(kwArgs));
                        }

                        if(!vector.length){
                                delete this.anim[runName][index];
                                return;
                        }

                        anim.action = df.combine(vector);
                        if(o.type == "onmouseout"){
                                hub.connect(anim.action, "onEnd", this, function(){
                                        if(this.anim[runName]){
                                                delete this.anim[runName][index];
                                        }
                                });
                        }
                        anim.action.play();
                }
        });
});