CanvasDrawing.js revision 0fdefaa9ca017edfb76b736c825b34186f33045a
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsyncvar SHAPE = "canvasShape",
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync DOCUMENT = Y.config.doc,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync Y_LANG = Y.Lang,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync AttributeLite = Y.AttributeLite,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync CanvasShape,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync CanvasPath,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync CanvasRect,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync CanvasEllipse,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync CanvasCircle,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync CanvasPieSlice,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync Y_Color = Y.Color,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync PARSE_INT = parseInt,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync PARSE_FLOAT = parseFloat,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync IS_NUMBER = Y_LANG.isNumber,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync RE = RegExp,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync TORGB = Y_Color.toRGB,
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync TOHEX = Y_Color.toHex;
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync/**
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Drawing.html">`Drawing`</a> class.
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * `CanvasDrawing` is not intended to be used directly. Instead, use the <a href="Drawing.html">`Drawing`</a> class.
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync * If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync * <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Drawing.html">`Drawing`</a>
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * class will point to the `CanvasDrawing` class.
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync *
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @class CanvasDrawing
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @constructor
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync */
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsyncfunction CanvasDrawing()
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync{
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync}
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsyncCanvasDrawing.prototype = {
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync /**
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * Parses hex color string and alpha value to rgba
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync *
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @method _toRGBA
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @param {Object} val Color value to parse. Can be hex string, rgb or name.
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @param {Number} alpha Numeric value between 0 and 1 representing the alpha level.
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @private
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync */
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync _toRGBA: function(val, alpha) {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync alpha = (alpha !== undefined) ? alpha : 1;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync if (!Y_Color.re_RGB.test(val)) {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync val = TOHEX(val);
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync }
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync if(Y_Color.re_hex.exec(val)) {
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync val = 'rgba(' + [
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync PARSE_INT(RE.$1, 16),
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync PARSE_INT(RE.$2, 16),
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync PARSE_INT(RE.$3, 16)
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync ].join(',') + ',' + alpha + ')';
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync }
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync return val;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync },
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Converts color to rgb format
0c94a8282c9042b02f022302a3d987746140eab9vboxsync *
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @method _toRGB
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param val Color value to convert.
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @private
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync */
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync _toRGB: function(val) {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync return TORGB(val);
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync },
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Sets the size of the graphics object.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method setSize
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param w {Number} width to set for the instance.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param h {Number} height to set for the instance.
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync * @private
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync */
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync setSize: function(w, h) {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync if(this.get("autoSize"))
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync {
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync if(w > this.node.getAttribute("width"))
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this.node.style.width = w + "px";
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this.node.setAttribute("width", w);
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync }
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync if(h > this.node.getAttribute("height"))
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync {
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync this.node.style.height = h + "px";
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync this.node.setAttribute("height", h);
5c4d7e2aae42bbf39793dfa686925f076a56b4d5vboxsync }
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync }
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync },
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync /**
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * Tracks coordinates. Used to calculate the start point of dashed lines.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync *
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @method _updateCoords
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @param {Number} x x-coordinate
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @param {Number} y y-coordinate
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @private
0c94a8282c9042b02f022302a3d987746140eab9vboxsync */
0c94a8282c9042b02f022302a3d987746140eab9vboxsync _updateCoords: function(x, y)
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._xcoords.push(x);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._ycoords.push(y);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync },
0c94a8282c9042b02f022302a3d987746140eab9vboxsync
0c94a8282c9042b02f022302a3d987746140eab9vboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Clears the coordinate arrays. Called at the end of a drawing operation.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync *
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @method _clearAndUpdateCoords
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @private
0c94a8282c9042b02f022302a3d987746140eab9vboxsync */
0c94a8282c9042b02f022302a3d987746140eab9vboxsync _clearAndUpdateCoords: function()
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync var x = this._xcoords.pop() || 0,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync y = this._ycoords.pop() || 0;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._updateCoords(x, y);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync },
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Moves the shape's dom node.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync *
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @method _updateNodePosition
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @private
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync */
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync _updateNodePosition: function()
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync var node = this.get("node"),
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync x = this.get("x"),
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync y = this.get("y");
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync node.style.position = "absolute";
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync node.style.left = (x + this._left) + "px";
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync node.style.top = (y + this._top) + "px";
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync },
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Queues up a method to be executed when a shape redraws.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync *
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @method _updateDrawingQueue
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Array} val An array containing data that can be parsed into a method and arguments. The value at zero-index of the array is a string reference of
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * the drawing method that will be called. All subsequent indices are argument for that method. For example, `lineTo(10, 100)` would be structured as:
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * `["lineTo", 10, 100]`.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @private
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync */
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync _updateDrawingQueue: function(val)
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._methods.push(val);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync },
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Draws a line segment using the current line style from the current drawing position to the specified x and y coordinates.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync *
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @method lineTo
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} point1 x-coordinate for the end point.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} point2 y-coordinate for the end point.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync */
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync lineTo: function(point1, point2, etc)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync var args = arguments,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync i = 0,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync len,
1969e98a26e5b56b67fbe3b6bfa007f8f09e86ebvboxsync x,
44372afb953dc9f1f1ec71943f5f561a607c0307vboxsync y,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync if(!this._lineToMethods)
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._lineToMethods = [];
0c94a8282c9042b02f022302a3d987746140eab9vboxsync }
0c94a8282c9042b02f022302a3d987746140eab9vboxsync if (typeof point1 === 'string' || typeof point1 === 'number') {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync args = [[point1, point2]];
0c94a8282c9042b02f022302a3d987746140eab9vboxsync }
0c94a8282c9042b02f022302a3d987746140eab9vboxsync
0c94a8282c9042b02f022302a3d987746140eab9vboxsync len = args.length;
0c94a8282c9042b02f022302a3d987746140eab9vboxsync for (; i < len; ++i)
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync if(args[i])
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync x = args[i][0];
0c94a8282c9042b02f022302a3d987746140eab9vboxsync y = args[i][1];
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._updateDrawingQueue(["lineTo", x, y]);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._lineToMethods[this._lineToMethods.length] = this._methods[this._methods.length - 1];
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._trackSize(x - wt, y - wt);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._trackSize(x + wt, y + wt);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._updateCoords(x, y);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync }
0c94a8282c9042b02f022302a3d987746140eab9vboxsync }
0c94a8282c9042b02f022302a3d987746140eab9vboxsync this._drawingComplete = false;
0c94a8282c9042b02f022302a3d987746140eab9vboxsync return this;
0c94a8282c9042b02f022302a3d987746140eab9vboxsync },
0c94a8282c9042b02f022302a3d987746140eab9vboxsync
0c94a8282c9042b02f022302a3d987746140eab9vboxsync /**
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * Moves the current drawing position to specified x and y coordinates.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync *
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @method moveTo
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @param {Number} x x-coordinate for the end point.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @param {Number} y y-coordinate for the end point.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync */
0c94a8282c9042b02f022302a3d987746140eab9vboxsync moveTo: function(x, y) {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync var wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateDrawingQueue(["moveTo", x, y]);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(x - wt, y - wt);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(x + wt, y + wt);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateCoords(x, y);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._drawingComplete = false;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync return this;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync },
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * Draws a bezier curve.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method curveTo
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} cp1x x-coordinate for the first control point.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @param {Number} cp1y y-coordinate for the first control point.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @param {Number} cp2x x-coordinate for the second control point.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @param {Number} cp2y y-coordinate for the second control point.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @param {Number} x x-coordinate for the end point.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @param {Number} y y-coordinate for the end point.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync */
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync curveTo: function(cp1x, cp1y, cp2x, cp2y, x, y) {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync var hiX,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync hiY,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loX,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loY;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateDrawingQueue(["bezierCurveTo", cp1x, cp1y, cp2x, cp2y, x, y]);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._drawingComplete = false;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync hiX = Math.max(x, Math.max(cp1x, cp2x));
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync hiY = Math.max(y, Math.max(cp1y, cp2y));
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loX = Math.min(x, Math.min(cp1x, cp2x));
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loY = Math.min(y, Math.min(cp1y, cp2y));
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(hiX, hiY);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(loX, loY);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateCoords(hiX, hiY);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync return this;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync },
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * Draws a quadratic bezier curve.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method quadraticCurveTo
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} cpx x-coordinate for the control point.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} cpy y-coordinate for the control point.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} x x-coordinate for the end point.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} y y-coordinate for the end point.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync */
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync quadraticCurveTo: function(cpx, cpy, x, y) {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync var hiX,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync hiY,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loX,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loY,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateDrawingQueue(["quadraticCurveTo", cpx, cpy, x, y]);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._drawingComplete = false;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync hiX = Math.max(x, cpx);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync hiY = Math.max(y, cpy);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loX = Math.min(x, cpx);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync loY = Math.min(y, cpy);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(hiX + wt, hiY + wt);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(loX - wt, loY - wt);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateCoords(hiX, hiY);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync return this;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync },
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * Draws a circle. Used internally by `CanvasCircle` class.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method drawCircle
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} x y-coordinate
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} y x-coordinate
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} r radius
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @protected
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync */
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync drawCircle: function(x, y, radius) {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync var startAngle = 0,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync endAngle = 2 * Math.PI,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync wt = this._stroke & this._strokeWeight ? this._strokeWeight : 0,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync circum = radius * 2;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync circum += wt;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._drawingComplete = false;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(x + circum, y + circum);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(x - wt, y - wt);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateCoords(x, y);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateDrawingQueue(["arc", x + radius, y + radius, radius, startAngle, endAngle, false]);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync return this;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync },
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * Draws an ellipse. Used internally by `CanvasEllipse` class.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method drawEllipse
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} x x-coordinate
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} y y-coordinate
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} w width
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} h height
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @protected
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync */
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync drawEllipse: function(x, y, w, h) {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync var l = 8,
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync theta = -(45/180) * Math.PI,
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync angle = 0,
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync angleMid,
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync radius = w/2,
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync yRadius = h/2,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync i = 0,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync centerX = x + radius,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync centerY = y + yRadius,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync ax, ay, bx, by, cx, cy,
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
29099c2d04b11e614f1fa399fab9e9162f2788b9vboxsync
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync ax = centerX + Math.cos(0) * radius;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync ay = centerY + Math.sin(0) * yRadius;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this.moveTo(ax, ay);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync for(; i < l; i++)
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync angle += theta;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync angleMid = angle - (theta / 2);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync bx = centerX + Math.cos(angle) * radius;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync by = centerY + Math.sin(angle) * yRadius;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync cx = centerX + Math.cos(angleMid) * (radius / Math.cos(theta / 2));
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync cy = centerY + Math.sin(angleMid) * (yRadius / Math.cos(theta / 2));
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._updateDrawingQueue(["quadraticCurveTo", cx, cy, bx, by]);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync }
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._trackSize(x + w + wt, y + h + wt);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._trackSize(x - wt, y - wt);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._updateCoords(x, y);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync return this;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync },
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync /**
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * Draws a rectangle.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync *
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @method drawRect
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} x x-coordinate
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} y y-coordinate
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} w width
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} h height
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync */
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync drawRect: function(x, y, w, h) {
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync var wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._drawingComplete = false;
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._updateDrawingQueue(["moveTo", x, y]);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._updateDrawingQueue(["lineTo", x + w, y]);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync this._updateDrawingQueue(["lineTo", x + w, y + h]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["lineTo", x, y + h]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["lineTo", x, y]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._trackSize(x - wt, y - wt);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._trackSize(x + w + wt, y + h + wt);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync return this;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync },
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync /**
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * Draws a rectangle with rounded corners.
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync *
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @method drawRect
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} x x-coordinate
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} y y-coordinate
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} w width
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} h height
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} ew width of the ellipse used to draw the rounded corners
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} eh height of the ellipse used to draw the rounded corners
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync */
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync drawRoundRect: function(x, y, w, h, ew, eh) {
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync var wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync this._drawingComplete = false;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync this._updateDrawingQueue(["moveTo", x, y + eh]);
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync this._updateDrawingQueue(["lineTo", x, y + h - eh]);
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync this._updateDrawingQueue(["quadraticCurveTo", x, y + h, x + ew, y + h]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["lineTo", x + w - ew, y + h]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["quadraticCurveTo", x + w, y + h, x + w, y + h - eh]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["lineTo", x + w, y + eh]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["quadraticCurveTo", x + w, y, x + w - ew, y]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["lineTo", x + ew, y]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["quadraticCurveTo", x, y, x, y + eh]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._trackSize(x - wt, y - wt);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._trackSize(x + w + wt, y + h + wt);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateCoords(w, h);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync return this;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync },
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync /**
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * Draws a wedge.
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync *
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @method drawWedge
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} x x-coordinate of the wedge's center point
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} y y-coordinate of the wedge's center point
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @param {Number} startAngle starting angle in degrees
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync * @param {Number} arc sweep of the wedge. Negative values draw clockwise.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @param {Number} radius radius of wedge. If [optional] yRadius is defined, then radius is the x radius.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @param {Number} yRadius [optional] y radius for wedge.
0c94a8282c9042b02f022302a3d987746140eab9vboxsync * @private
0c94a8282c9042b02f022302a3d987746140eab9vboxsync */
0c94a8282c9042b02f022302a3d987746140eab9vboxsync drawWedge: function(x, y, startAngle, arc, radius, yRadius)
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync var segs,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync segAngle,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync theta,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync angle,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync angleMid,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync ax,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync ay,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync bx,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync by,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync cx,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync cy,
0c94a8282c9042b02f022302a3d987746140eab9vboxsync i = 0;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync yRadius = yRadius || radius;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._drawingComplete = false;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync // move to x,y position
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._updateDrawingQueue(["moveTo", x, y]);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync yRadius = yRadius || radius;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync // limit sweep to reasonable numbers
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync if(Math.abs(arc) > 360)
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync arc = 360;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync // First we calculate how many segments are needed
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync // for a smooth arc.
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync segs = Math.ceil(Math.abs(arc) / 45);
0c69348b58bb8eabb1bea8867ee932b667bd0d34vboxsync
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync // Now calculate the sweep of each segment.
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync segAngle = arc / segs;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync // The math requires radians rather than degrees. To convert from degrees
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync // use the formula (degrees/180)*Math.PI to get radians.
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync theta = -(segAngle / 180) * Math.PI;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync // convert angle startAngle to radians
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync angle = (startAngle / 180) * Math.PI;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync // draw the curve in segments no larger than 45 degrees.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync if(segs > 0)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync // draw a line from the center to the start of the curve
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync ax = x + Math.cos(startAngle / 180 * Math.PI) * radius;
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync ay = y + Math.sin(startAngle / 180 * Math.PI) * yRadius;
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync this.lineTo(ax, ay);
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync // Loop for drawing curve segments
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync for(; i < segs; ++i)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync angle += theta;
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync angleMid = angle - (theta / 2);
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync bx = x + Math.cos(angle) * radius;
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync by = y + Math.sin(angle) * yRadius;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync cx = x + Math.cos(angleMid) * (radius / Math.cos(theta / 2));
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync cy = y + Math.sin(angleMid) * (yRadius / Math.cos(theta / 2));
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._updateDrawingQueue(["quadraticCurveTo", cx, cy, bx, by]);
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync }
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync // close the wedge by drawing a line to the center
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync this._updateDrawingQueue(["lineTo", x, y]);
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(0 , 0);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._trackSize(radius * 2, radius * 2);
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync return this;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync },
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync /**
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync * Completes a drawing operation.
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method end
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync */
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync end: function() {
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync this._paint();
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync return this;
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync },
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync /**
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync * Clears the graphics object.
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync *
f9cdd92d151d9c28eb0f1aed25863fc04f85691dvboxsync * @method clear
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync */
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync /**
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * Returns a linear gradient fill
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method _getLinearGradient
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @return CanvasGradient
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync * @private
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync */
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync _getLinearGradient: function() {
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync var isNumber = Y.Lang.isNumber,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync fill = this.get("fill"),
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync stops = fill.stops,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync opacity,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync color,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync stop,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync i = 0,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync len = stops.length,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync gradient,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync x = 0,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync y = 0,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync w = this.get("width"),
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync h = this.get("height"),
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync r = fill.rotation,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync x1, x2, y1, y2,
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync cx = x + w/2,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync cy = y + h/2,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync offset,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync radCon = Math.PI/180,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync tanRadians = parseFloat(parseFloat(Math.tan(r * radCon)).toFixed(8));
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync if(Math.abs(tanRadians) * w/2 >= h/2)
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync {
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync if(r < 180)
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y1 = y;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y2 = y + h;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync else
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y1 = y + h;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y2 = y;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync x1 = cx - ((cy - y1)/tanRadians);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x2 = cx - ((cy - y2)/tanRadians);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync else
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync if(r > 90 && r < 270)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x1 = x + w;
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync x2 = x;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync else
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x1 = x;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x2 = x + w;
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync y1 = ((tanRadians * (cx - x1)) - cy) * -1;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync y2 = ((tanRadians * (cx - x2)) - cy) * -1;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync gradient = this._context.createLinearGradient(x1, y1, x2, y2);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync for(; i < len; ++i)
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync stop = stops[i];
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync opacity = stop.opacity;
0c94a8282c9042b02f022302a3d987746140eab9vboxsync color = stop.color;
0c94a8282c9042b02f022302a3d987746140eab9vboxsync offset = stop.offset;
0c94a8282c9042b02f022302a3d987746140eab9vboxsync if(isNumber(opacity))
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync {
0c94a8282c9042b02f022302a3d987746140eab9vboxsync opacity = Math.max(0, Math.min(1, opacity));
0c94a8282c9042b02f022302a3d987746140eab9vboxsync color = this._toRGBA(color, opacity);
0c94a8282c9042b02f022302a3d987746140eab9vboxsync }
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync else
0c94a8282c9042b02f022302a3d987746140eab9vboxsync {
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync color = TORGB(color);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync offset = stop.offset || i/(len - 1);
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync gradient.addColorStop(offset, color);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync return gradient;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync },
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync /**
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * Returns a radial gradient fill
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync *
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @method _getRadialGradient
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @return CanvasGradient
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @private
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync */
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync _getRadialGradient: function() {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync var isNumber = Y.Lang.isNumber,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync fill = this.get("fill"),
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync r = fill.r,
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync fx = fill.fx,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync fy = fill.fy,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync stops = fill.stops,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync opacity,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync color,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync stop,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync i = 0,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync len = stops.length,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync gradient,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x = 0,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y = 0,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync w = this.get("width"),
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync h = this.get("height"),
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x1, x2, y1, y2, r2,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync xc, yc, xn, yn, d,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync offset,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync ratio,
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync stopMultiplier;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync xc = x + w/2;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync yc = y + h/2;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x1 = w * fx;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync y1 = h * fy;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x2 = x + w/2;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y2 = y + h/2;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync r2 = w * r;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync d = Math.sqrt( Math.pow(Math.abs(xc - x1), 2) + Math.pow(Math.abs(yc - y1), 2) );
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync if(d >= r2)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync ratio = d/r2;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync //hack. gradient won't show if it is exactly on the edge of the arc
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync if(ratio === 1)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync ratio = 1.01;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync xn = (x1 - xc)/ratio;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync yn = (y1 - yc)/ratio;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync xn = xn > 0 ? Math.floor(xn) : Math.ceil(xn);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync yn = yn > 0 ? Math.floor(yn) : Math.ceil(yn);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync x1 = xc + xn;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync y1 = yc + yn;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync //If the gradient radius is greater than the circle's, adjusting the radius stretches the gradient properly.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync //If the gradient radius is less than the circle's, adjusting the radius of the gradient will not work.
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync //Instead, adjust the color stops to reflect the smaller radius.
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync if(r >= 0.5)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync gradient = this._context.createRadialGradient(x1, y1, r, x2, y2, r * w);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync stopMultiplier = 1;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync }
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync else
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync gradient = this._context.createRadialGradient(x1, y1, r, x2, y2, w/2);
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync stopMultiplier = r * 2;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync }
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync for(; i < len; ++i)
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync stop = stops[i];
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync opacity = stop.opacity;
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync color = stop.color;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync offset = stop.offset;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync if(isNumber(opacity))
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync opacity = Math.max(0, Math.min(1, opacity));
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync color = this._toRGBA(color, opacity);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync else
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync {
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync color = TORGB(color);
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync offset = stop.offset || i/(len - 1);
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync offset *= stopMultiplier;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync if(offset <= 1)
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync gradient.addColorStop(offset, color);
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync }
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync }
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync return gradient;
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync },
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * Clears all values
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync *
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @method _initProps
66b58af085e22ee26be57f98127fb49ee2e91790vboxsync * @private
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync */
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync _initProps: function() {
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._methods = [];
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._lineToMethods = [];
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._xcoords = [0];
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._ycoords = [0];
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._width = 0;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._height = 0;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._left = 0;
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync this._top = 0;
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync this._right = 0;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._bottom = 0;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync },
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * Indicates a drawing has completed.
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @property _drawingComplete
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @type Boolean
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @private
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync */
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync _drawingComplete: false,
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync /**
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * Creates canvas element
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync *
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @method _createGraphic
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @return HTMLCanvasElement
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync * @private
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync */
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync _createGraphic: function(config) {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync var graphic = Y.config.doc.createElement('canvas');
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync return graphic;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync },
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync /**
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * Updates the size of the graphics object
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync *
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @method _trackSize
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} w width
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @param {Number} h height
19320d55d1417c39b3b5673a53aaa5ef177242c8vboxsync * @private
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync */
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync _trackSize: function(w, h) {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync if (w > this._right) {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._right = w;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync if(w < this._left)
9c9db71d639cf066ed41d49629d46d48bff4be2fvboxsync {
44372afb953dc9f1f1ec71943f5f561a607c0307vboxsync this._left = w;
44372afb953dc9f1f1ec71943f5f561a607c0307vboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync if (h < this._top)
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._top = h;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync if (h > this._bottom)
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync {
661bfa5aae55ac2f94fa1cb131ea2323e5f6e633vboxsync this._bottom = h;
fdb40b7d2efa84fc6f03b7a695cb4b2e035c30c7vboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._width = this._right - this._left;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync this._height = this._bottom - this._top;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync }
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync};
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsyncY.CanvasDrawing = CanvasDrawing;
c66c4413faa5a72ce047742f9acfa85e94dec8afvboxsync