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+/**
+ * $Id: mxDoubleEllipse.js,v 1.19 2012-05-21 18:27:17 gaudenz Exp $
+ * Copyright (c) 2006-2010, JGraph Ltd
+ */
+/**
+ * Class: mxDoubleEllipse
+ *
+ * Extends <mxShape> to implement a double ellipse shape.
+ * This shape is registered under <mxConstants.SHAPE_DOUBLE_ELLIPSE>
+ * in <mxCellRenderer>.
+ *
+ * Constructor: mxDoubleEllipse
+ *
+ * Constructs a new ellipse shape.
+ *
+ * Parameters:
+ *
+ * bounds - <mxRectangle> that defines the bounds. This is stored in
+ * <mxShape.bounds>.
+ * fill - String that defines the fill color. This is stored in <fill>.
+ * stroke - String that defines the stroke color. This is stored in <stroke>.
+ * strokewidth - Optional integer that defines the stroke width. Default is
+ * 1. This is stored in <strokewidth>.
+ */
+function mxDoubleEllipse(bounds, fill, stroke, strokewidth)
+{
+ this.bounds = bounds;
+ this.fill = fill;
+ this.stroke = stroke;
+ this.strokewidth = (strokewidth != null) ? strokewidth : 1;
+};
+
+/**
+ * Extends mxShape.
+ */
+mxDoubleEllipse.prototype = new mxShape();
+mxDoubleEllipse.prototype.constructor = mxDoubleEllipse;
+
+/**
+ * Variable: vmlNodes
+ *
+ * Adds local references to <mxShape.vmlNodes>.
+ */
+mxDoubleEllipse.prototype.vmlNodes = mxDoubleEllipse.prototype.vmlNodes.concat(['background', 'foreground']);
+
+/**
+ * Variable: mixedModeHtml
+ *
+ * Overrides the parent value with false, meaning it will
+ * draw in VML in mixed Html mode.
+ */
+mxDoubleEllipse.prototype.mixedModeHtml = false;
+
+/**
+ * Variable: preferModeHtml
+ *
+ * Overrides the parent value with false, meaning it will
+ * draw as VML in prefer Html mode.
+ */
+mxDoubleEllipse.prototype.preferModeHtml = false;
+
+/**
+ * Variable: vmlScale
+ *
+ * Renders VML with a scale of 2.
+ */
+mxDoubleEllipse.prototype.vmlScale = 2;
+
+/**
+ * Function: createVml
+ *
+ * Creates and returns the VML node to represent this shape.
+ */
+mxDoubleEllipse.prototype.createVml = function()
+{
+ var node = document.createElement('v:group');
+
+ // Draws the background
+ this.background = document.createElement('v:arc');
+ this.background.startangle = '0';
+ this.background.endangle = '360';
+ this.configureVmlShape(this.background);
+
+ node.appendChild(this.background);
+
+ // Ignores values that only apply to the background
+ this.label = this.background;
+ this.isShadow = false;
+ this.fill = null;
+
+ // Draws the foreground
+ this.foreground = document.createElement('v:oval');
+ this.configureVmlShape(this.foreground);
+
+ node.appendChild(this.foreground);
+
+ this.stroke = null;
+ this.configureVmlShape(node);
+
+ return node;
+};
+
+/**
+ * Function: redrawVml
+ *
+ * Updates the VML node(s) to reflect the latest bounds and scale.
+ */
+mxDoubleEllipse.prototype.redrawVml = function()
+{
+ this.updateVmlShape(this.node);
+ this.updateVmlShape(this.background);
+ this.updateVmlShape(this.foreground);
+
+ var inset = Math.round((this.strokewidth + 3) * this.scale) * this.vmlScale;
+ var w = Math.round(this.bounds.width * this.vmlScale);
+ var h = Math.round(this.bounds.height * this.vmlScale);
+
+ this.foreground.style.top = inset + 'px'; // relative
+ this.foreground.style.left = inset + 'px'; // relative
+ this.foreground.style.width = Math.max(0, w - 2 * inset) + 'px';
+ this.foreground.style.height = Math.max(0, h - 2 * inset) + 'px';
+};
+
+/**
+ * Function: createSvg
+ *
+ * Creates and returns the SVG node(s) to represent this shape.
+ */
+mxDoubleEllipse.prototype.createSvg = function()
+{
+ var g = this.createSvgGroup('ellipse');
+ this.foreground = document.createElementNS(mxConstants.NS_SVG, 'ellipse');
+
+ if (this.stroke != null)
+ {
+ this.foreground.setAttribute('stroke', this.stroke);
+ }
+ else
+ {
+ this.foreground.setAttribute('stroke', 'none');
+ }
+
+ this.foreground.setAttribute('fill', 'none');
+ g.appendChild(this.foreground);
+
+ return g;
+};
+
+/**
+ * Function: redrawSvg
+ *
+ * Updates the SVG node(s) to reflect the latest bounds and scale.
+ */
+mxDoubleEllipse.prototype.redrawSvg = function()
+{
+ if (this.crisp)
+ {
+ this.innerNode.setAttribute('shape-rendering', 'crispEdges');
+ this.foreground.setAttribute('shape-rendering', 'crispEdges');
+ }
+ else
+ {
+ this.innerNode.removeAttribute('shape-rendering');
+ this.foreground.removeAttribute('shape-rendering');
+ }
+
+ this.updateSvgNode(this.innerNode);
+ this.updateSvgNode(this.shadowNode);
+ this.updateSvgNode(this.foreground, (this.strokewidth + 3) * this.scale);
+
+ if (this.isDashed)
+ {
+ var phase = Math.max(1, Math.round(3 * this.scale * this.strokewidth));
+ this.innerNode.setAttribute('stroke-dasharray', phase + ' ' + phase);
+ }
+};
+
+/**
+ * Function: updateSvgNode
+ *
+ * Updates the given node to reflect the new <bounds> and <scale>.
+ */
+mxDoubleEllipse.prototype.updateSvgNode = function(node, inset)
+{
+ inset = (inset != null) ? inset : 0;
+
+ if (node != null)
+ {
+ var strokeWidth = Math.round(Math.max(1, this.strokewidth * this.scale));
+ node.setAttribute('stroke-width', strokeWidth);
+
+ node.setAttribute('cx', this.bounds.x + this.bounds.width / 2);
+ node.setAttribute('cy', this.bounds.y + this.bounds.height / 2);
+ node.setAttribute('rx', Math.max(0, this.bounds.width / 2 - inset));
+ node.setAttribute('ry', Math.max(0, this.bounds.height / 2 - inset));
+
+ // Updates the transform of the shadow
+ if (this.shadowNode != null)
+ {
+ this.shadowNode.setAttribute('transform', this.getSvgShadowTransform());
+ }
+ }
+};