-Dygraph.Circles = {
- DEFAULT : function(g, name, ctx, canvasx, canvasy, color, radius) {
- ctx.beginPath();
- ctx.fillStyle = color;
- ctx.arc(canvasx, canvasy, radius, 0, 2 * Math.PI, false);
- ctx.fill();
- },
- TRIANGLE : Dygraph.shapeFunction_(3),
- SQUARE : Dygraph.shapeFunction_(4, Math.PI / 4),
- DIAMOND : Dygraph.shapeFunction_(4),
- PENTAGON : Dygraph.shapeFunction_(5),
- HEXAGON : Dygraph.shapeFunction_(6),
- CIRCLE : function(g, name, ctx, cx, cy, color, radius) {
- ctx.beginPath();
- ctx.strokeStyle = color;
- ctx.fillStyle = "white";
- ctx.arc(cx, cy, radius, 0, 2 * Math.PI, false);
- ctx.fill();
- ctx.stroke();
- },
- STAR : Dygraph.shapeFunction_(5, 0, 4 * Math.PI / 5),
- PLUS : function(g, name, ctx, cx, cy, color, radius) {
- ctx.strokeStyle = color;
+/**
+ * Converts any valid CSS color (hex, rgb(), named color) to an RGB tuple.
+ *
+ * @param {!string} colorStr Any valid CSS color string.
+ * @return {{r:number,g:number,b:number}} Parsed RGB tuple.
+ * @private
+ */
+Dygraph.toRGB_ = function(colorStr) {
+ // TODO(danvk): cache color parses to avoid repeated DOM manipulation.
+ var div = document.createElement('div');
+ div.style.backgroundColor = colorStr;
+ div.style.visibility = 'hidden';
+ document.body.appendChild(div);
+ var rgbStr = window.getComputedStyle(div, null).backgroundColor;
+ document.body.removeChild(div);
+ var bits = /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/.exec(rgbStr);
+ return {
+ r: parseInt(bits[1], 10),
+ g: parseInt(bits[2], 10),
+ b: parseInt(bits[3], 10)
+ };
+};