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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["dojox.charting.plot2d.Base"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.charting.plot2d.Base"] = true;
dojo.provide("dojox.charting.plot2d.Base");
dojo.require("dojox.charting.scaler.primitive");
dojo.require("dojox.charting.Element");
dojo.require("dojox.charting.plot2d.common");
dojo.require("dojox.charting.plot2d._PlotEvents");
/*=====
dojox.charting.plot2d.__PlotCtorArgs = function(){
// summary:
// The base keyword arguments object for plot constructors.
// Note that the parameters for this may change based on the
// specific plot type (see the corresponding plot type for
// details).
}
=====*/
dojo.declare("dojox.charting.plot2d.Base", [dojox.charting.Element, dojox.charting.plot2d._PlotEvents], {
constructor: function(chart, kwArgs){
// summary:
// Create a base plot for charting.
// chart: dojox.chart.Chart2D
// The chart this plot belongs to.
// kwArgs: dojox.charting.plot2d.__PlotCtorArgs?
// An optional arguments object to help define the plot.
this.zoom = null,
this.zoomQueue = []; // zooming action task queue
this.lastWindow = {vscale: 1, hscale: 1, xoffset: 0, yoffset: 0};
},
clear: function(){
// summary:
// Clear out all of the information tied to this plot.
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
this.series = [];
this._hAxis = null;
this._vAxis = null;
this.dirty = true;
return this; // dojox.charting.plot2d.Base
},
setAxis: function(axis){
// summary:
// Set an axis for this plot.
// axis: dojox.charting.axis2d.Base
// The axis to set.
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
if(axis){
this[axis.vertical ? "_vAxis" : "_hAxis"] = axis;
}
return this; // dojox.charting.plot2d.Base
},
addSeries: function(run){
// summary:
// Add a data series to this plot.
// run: dojox.charting.Series
// The series to be added.
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
this.series.push(run);
return this; // dojox.charting.plot2d.Base
},
getSeriesStats: function(){
// summary:
// Calculate the min/max on all attached series in both directions.
// returns: Object
// {hmin, hmax, vmin, vmax} min/max in both directions.
return dojox.charting.plot2d.common.collectSimpleStats(this.series);
},
calculateAxes: function(dim){
// summary:
// Stub function for running the axis calculations (depricated).
// dim: Object
// An object of the form { width, height }
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
this.initializeScalers(dim, this.getSeriesStats());
return this; // dojox.charting.plot2d.Base
},
isDirty: function(){
// summary:
// Returns whether or not this plot needs to be rendered.
// returns: Boolean
// The state of the plot.
return this.dirty || this._hAxis && this._hAxis.dirty || this._vAxis && this._vAxis.dirty; // Boolean
},
isDataDirty: function(){
// summary:
// Returns whether or not any of this plot's data series need to be rendered.
// returns: Boolean
// Flag indicating if any of this plot's series are invalid and need rendering.
return dojo.some(this.series, function(item){ return item.dirty; }); // Boolean
},
performZoom: function(dim, offsets){
// summary:
// Create/alter any zooming windows on this plot.
// dim: Object
// An object of the form { width, height }.
// offsets: Object
// An object of the form { l, r, t, b }.
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
// get current zooming various
var vs = this._vAxis.scale || 1,
hs = this._hAxis.scale || 1,
vOffset = dim.height - offsets.b,
hBounds = this._hScaler.bounds,
xOffset = (hBounds.from - hBounds.lower) * hBounds.scale,
vBounds = this._vScaler.bounds,
yOffset = (vBounds.from - vBounds.lower) * vBounds.scale;
// get incremental zooming various
rVScale = vs / this.lastWindow.vscale,
rHScale = hs / this.lastWindow.hscale,
rXOffset = (this.lastWindow.xoffset - xOffset)/
((this.lastWindow.hscale == 1)? hs : this.lastWindow.hscale),
rYOffset = (yOffset - this.lastWindow.yoffset)/
((this.lastWindow.vscale == 1)? vs : this.lastWindow.vscale),
shape = this.group,
anim = dojox.gfx.fx.animateTransform(dojo.delegate({
shape: shape,
duration: 1200,
transform:[
{name:"translate", start:[0, 0], end: [offsets.l * (1 - rHScale), vOffset * (1 - rVScale)]},
{name:"scale", start:[1, 1], end: [rHScale, rVScale]},
{name:"original"},
{name:"translate", start: [0, 0], end: [rXOffset, rYOffset]}
]}, this.zoom));
dojo.mixin(this.lastWindow, {vscale: vs, hscale: hs, xoffset: xOffset, yoffset: yOffset});
//add anim to zooming action queue,
//in order to avoid several zooming action happened at the same time
this.zoomQueue.push(anim);
//perform each anim one by one in zoomQueue
dojo.connect(anim, "onEnd", this, function(){
this.zoom = null;
this.zoomQueue.shift();
if(this.zoomQueue.length > 0){
this.zoomQueue[0].play();
}
});
if(this.zoomQueue.length == 1){
this.zoomQueue[0].play();
}
return this; // dojox.charting.plot2d.Base
},
render: function(dim, offsets){
// summary:
// Render the plot on the chart.
// dim: Object
// An object of the form { width, height }.
// offsets: Object
// An object of the form { l, r, t, b }.
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
return this; // dojox.charting.plot2d.Base
},
getRequiredColors: function(){
// summary:
// Get how many data series we have, so we know how many colors to use.
// returns: Number
// The number of colors needed.
return this.series.length; // Number
},
initializeScalers: function(dim, stats){
// summary:
// Initializes scalers using attached axes.
// dim: Object:
// Size of a plot area in pixels as {width, height}.
// stats: Object:
// Min/max of data in both directions as {hmin, hmax, vmin, vmax}.
// returns: dojox.charting.plot2d.Base
// A reference to this plot for functional chaining.
if(this._hAxis){
if(!this._hAxis.initialized()){
this._hAxis.calculate(stats.hmin, stats.hmax, dim.width);
}
this._hScaler = this._hAxis.getScaler();
}else{
this._hScaler = dojox.charting.scaler.primitive.buildScaler(stats.hmin, stats.hmax, dim.width);
}
if(this._vAxis){
if(!this._vAxis.initialized()){
this._vAxis.calculate(stats.vmin, stats.vmax, dim.height);
}
this._vScaler = this._vAxis.getScaler();
}else{
this._vScaler = dojox.charting.scaler.primitive.buildScaler(stats.vmin, stats.vmax, dim.height);
}
return this; // dojox.charting.plot2d.Base
}
});
}
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