source: [view]
dojo.provide("dojox.charting.plot2d.Grid");
dojo.require("dojox.charting.Element");
dojo.require("dojox.charting.plot2d.common");
dojo.require("dojox.lang.functional");
dojo.require("dojox.lang.utils");
dojo.declare("dojox.charting.plot2d.__GridCtorArgs", dojox.charting.plot2d.__DefaultCtorArgs, {
// summary:
// A special keyword arguments object that is specific to a grid "plot".
// hMajorLines: Boolean?
// Whether to show lines at the major ticks along the horizontal axis. Default is true.
hMajorLines: true,
// hMinorLines: Boolean?
// Whether to show lines at the minor ticks along the horizontal axis. Default is false.
hMinorLines: false,
// vMajorLines: Boolean?
// Whether to show lines at the major ticks along the vertical axis. Default is true.
vMajorLines: true,
// vMinorLines: Boolean?
// Whether to show lines at the major ticks along the vertical axis. Default is false.
vMinorLines: false,
// hStripes: String?
// Whether or not to show stripes (alternating fills) along the horizontal axis. Default is "none".
hStripes: "none",
// vStripes: String?
// Whether or not to show stripes (alternating fills) along the vertical axis. Default is "none".
vStripes: "none"
});
(function(){
var du = dojox.lang.utils, dc = dojox.charting.plot2d.common;
dojo.declare("dojox.charting.plot2d.Grid", dojox.charting.Element, {
// summary:
// A "faux" plot that can be placed behind other plots to represent
// a grid against which other plots can be easily measured.
defaultParams: {
hAxis: "x", // use a horizontal axis named "x"
vAxis: "y", // use a vertical axis named "y"
hMajorLines: true, // draw horizontal major lines
hMinorLines: false, // draw horizontal minor lines
vMajorLines: true, // draw vertical major lines
vMinorLines: false, // draw vertical minor lines
hStripes: "none", // TBD
vStripes: "none", // TBD
animate: null // animate bars into place
},
optionalParams: {}, // no optional parameters
constructor: function(chart, kwArgs){
// summary:
// Create the faux Grid plot.
// chart: dojox.charting.Chart2D
// The chart this plot belongs to.
// kwArgs: dojox.charting.plot2d.__GridCtorArgs?
// An optional keyword arguments object to help define the parameters of the underlying grid.
this.opt = dojo.clone(this.defaultParams);
du.updateWithObject(this.opt, kwArgs);
this.hAxis = this.opt.hAxis;
this.vAxis = this.opt.vAxis;
this.dirty = true;
this.animate = this.opt.animate;
this.zoom = null,
this.zoomQueue = []; // zooming action task queue
this.lastWindow = {vscale: 1, hscale: 1, xoffset: 0, yoffset: 0};
},
clear: function(){
// summary:
// Clear out any parameters set on this plot.
// returns: dojox.charting.plot2d.Grid
// The reference to this plot for functional chaining.
this._hAxis = null;
this._vAxis = null;
this.dirty = true;
return this; // dojox.charting.plot2d.Grid
},
setAxis: function(axis){
// summary:
// Set an axis for this plot.
// returns: dojox.charting.plot2d.Grid
// The reference to this plot for functional chaining.
if(axis){
this[axis.vertical ? "_vAxis" : "_hAxis"] = axis;
}
return this; // dojox.charting.plot2d.Grid
},
addSeries: function(run){
// summary:
// Ignored but included as a dummy method.
// returns: dojox.charting.plot2d.Grid
// The reference to this plot for functional chaining.
return this; // dojox.charting.plot2d.Grid
},
getSeriesStats: function(){
// summary:
// Returns default stats (irrelevant for this type of plot).
// returns: Object
// {hmin, hmax, vmin, vmax} min/max in both directions.
return dojo.delegate(dc.defaultStats);
},
initializeScalers: function(){
// summary:
// Does nothing (irrelevant for this type of plot).
return this;
},
isDirty: function(){
// summary:
// Return whether or not this plot needs to be redrawn.
// returns: Boolean
// If this plot needs to be rendered, this will return true.
return this.dirty || this._hAxis && this._hAxis.dirty || this._vAxis && this._vAxis.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.Grid
// 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._hAxis.getScaler().bounds,
xOffset = (hBounds.from - hBounds.lower) * hBounds.scale,
vBounds = this._vAxis.getScaler().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.Grid