PlotKit.CanvasRenderer.prototype.__init__ = function()

in web/servicemix-web-console/src/main/webapp/js/plotkit/Canvas.js [75:161]

• 66 lines of code
• 11 McCabe index (conditional complexity)

PlotKit.CanvasRenderer.prototype.__init__ = function(element, layout, options) {
    var isNil = MochiKit.Base.isUndefinedOrNull;
    var Color = MochiKit.Color.Color;
    
    // default options
    this.options = {
        "drawBackground": true,
        "backgroundColor": Color.whiteColor(),
        "padding": {left: 30, right: 30, top: 5, bottom: 10},
        "colorScheme": PlotKit.Base.palette(PlotKit.Base.baseColors()[0]),
        "strokeColor": Color.whiteColor(),
        "strokeColorTransform": "asStrokeColor",
        "strokeWidth": 0.5,
        "shouldFill": true,
        "shouldStroke": true,
        "drawXAxis": true,
        "drawYAxis": true,
        "axisLineColor": Color.blackColor(),
        "axisLineWidth": 0.5,
        "axisTickSize": 3,
        "axisLabelColor": Color.blackColor(),
        "axisLabelFont": "Arial",
        "axisLabelFontSize": 9,
		"axisLabelWidth": 50,
		"pieRadius": 0.4,
        "enableEvents": true,
        "IECanvasHTC": "PlotKit/iecanvas.htc"
    };
    MochiKit.Base.update(this.options, options ? options : {});

    // we need to refetch the element because of this horrible Canvas on IE
    // crap
    this.element_id = element.id ? element.id : element;

    // Stuff relating to Canvas on IE support
    var self = PlotKit.CanvasRenderer;
    this.isIE = self.IECanvasEmulationIfNeeded(this.options.IECanvasHTC);
    this.IEDelay = 0.5;
    this.maxTries = 5;
    this.renderDelay = null;
    this.clearDelay = null;

    this.layout = layout;
    this.style = layout.style;
    this.element = MochiKit.DOM.getElement(this.element_id);
    //this.element = element;
    this.container = this.element.parentNode;
    this.height = this.element.height;
    this.width = this.element.width;

    // --- check whether everything is ok before we return

    if (isNil(this.element))
        throw "CanvasRenderer() - passed canvas is not found";

    if (!this.isIE && !(PlotKit.CanvasRenderer.isSupported(this.element)))
        throw "CanvasRenderer() - Canvas is not supported.";

    if (isNil(this.container) || (this.container.nodeName.toLowerCase() != "div"))
        throw "CanvasRenderer() - <canvas> needs to be enclosed in <div>";

    // internal state
    this.xlabels = new Array();
    this.ylabels = new Array();
    this.isFirstRender = true;

    this.area = {
        x: this.options.padding.left,
        y: this.options.padding.top,
        w: this.width - this.options.padding.left - this.options.padding.right,
        h: this.height - this.options.padding.top - this.options.padding.bottom
    };

    MochiKit.DOM.updateNodeAttributes(this.container, 
    {"style":{ "position": "relative", "width": this.width + "px"}});

    // load event system if we have Signals
    try {
        this.event_isinside = null;
        if (MochiKit.Signal && this.options.enableEvents) {
            this._initialiseEvents();
        }
    }
    catch (e) {
        // still experimental
    }
};