Your IP : 192.168.165.1
/*
YUI 3.17.2 (build 9c3c78e)
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
YUI.add('graphics-canvas', function (Y, NAME) {
var IMPLEMENTATION = "canvas",
SHAPE = "shape",
SPLITPATHPATTERN = /[a-z][^a-z]*/ig,
SPLITARGSPATTERN = /[\-]?[0-9]*[0-9|\.][0-9]*/g,
DOCUMENT = Y.config.doc,
Y_LANG = Y.Lang,
AttributeLite = Y.AttributeLite,
CanvasShape,
CanvasPath,
CanvasRect,
CanvasEllipse,
CanvasCircle,
CanvasPieSlice,
Y_DOM = Y.DOM,
Y_Color = Y.Color,
PARSE_INT = parseInt,
PARSE_FLOAT = parseFloat,
IS_NUMBER = Y_LANG.isNumber,
RE = RegExp,
TORGB = Y_Color.toRGB,
TOHEX = Y_Color.toHex,
_getClassName = Y.ClassNameManager.getClassName;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Drawing.html">`Drawing`</a> class.
* `CanvasDrawing` is not intended to be used directly. Instead, use the <a href="Drawing.html">`Drawing`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Drawing.html">`Drawing`</a>
* class will point to the `CanvasDrawing` class.
*
* @module graphics
* @class CanvasDrawing
* @constructor
*/
function CanvasDrawing()
{
}
CanvasDrawing.prototype = {
/**
* Maps path to methods
*
* @property _pathSymbolToMethod
* @type Object
* @private
*/
_pathSymbolToMethod: {
M: "moveTo",
m: "relativeMoveTo",
L: "lineTo",
l: "relativeLineTo",
C: "curveTo",
c: "relativeCurveTo",
Q: "quadraticCurveTo",
q: "relativeQuadraticCurveTo",
z: "closePath",
Z: "closePath"
},
/**
* Current x position of the drawing.
*
* @property _currentX
* @type Number
* @private
*/
_currentX: 0,
/**
* Current y position of the drqwing.
*
* @property _currentY
* @type Number
* @private
*/
_currentY: 0,
/**
* Parses hex color string and alpha value to rgba
*
* @method _toRGBA
* @param {Object} val Color value to parse. Can be hex string, rgb or name.
* @param {Number} alpha Numeric value between 0 and 1 representing the alpha level.
* @private
*/
_toRGBA: function(val, alpha) {
alpha = (alpha !== undefined) ? alpha : 1;
if (!Y_Color.re_RGB.test(val)) {
val = TOHEX(val);
}
if(Y_Color.re_hex.exec(val)) {
val = 'rgba(' + [
PARSE_INT(RE.$1, 16),
PARSE_INT(RE.$2, 16),
PARSE_INT(RE.$3, 16)
].join(',') + ',' + alpha + ')';
}
return val;
},
/**
* Converts color to rgb format
*
* @method _toRGB
* @param val Color value to convert.
* @private
*/
_toRGB: function(val) {
return TORGB(val);
},
/**
* Sets the size of the graphics object.
*
* @method setSize
* @param w {Number} width to set for the instance.
* @param h {Number} height to set for the instance.
* @private
*/
setSize: function(w, h) {
if(this.get("autoSize"))
{
if(w > this.node.getAttribute("width"))
{
this.node.style.width = w + "px";
this.node.setAttribute("width", w);
}
if(h > this.node.getAttribute("height"))
{
this.node.style.height = h + "px";
this.node.setAttribute("height", h);
}
}
},
/**
* Tracks coordinates. Used to calculate the start point of dashed lines.
*
* @method _updateCoords
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @private
*/
_updateCoords: function(x, y)
{
this._xcoords.push(x);
this._ycoords.push(y);
this._currentX = x;
this._currentY = y;
},
/**
* Clears the coordinate arrays. Called at the end of a drawing operation.
*
* @method _clearAndUpdateCoords
* @private
*/
_clearAndUpdateCoords: function()
{
var x = this._xcoords.pop() || 0,
y = this._ycoords.pop() || 0;
this._updateCoords(x, y);
},
/**
* Moves the shape's dom node.
*
* @method _updateNodePosition
* @private
*/
_updateNodePosition: function()
{
var node = this.get("node"),
x = this.get("x"),
y = this.get("y");
node.style.position = "absolute";
node.style.left = (x + this._left) + "px";
node.style.top = (y + this._top) + "px";
},
/**
* Queues up a method to be executed when a shape redraws.
*
* @method _updateDrawingQueue
* @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 the drawing method that will be called. All subsequent indices are argument for
* that method. For example, `lineTo(10, 100)` would be structured as:
* `["lineTo", 10, 100]`.
* @private
*/
_updateDrawingQueue: function(val)
{
this._methods.push(val);
},
/**
* Draws a line segment from the current drawing position to the specified x and y coordinates.
*
* @method lineTo
* @param {Number} point1 x-coordinate for the end point.
* @param {Number} point2 y-coordinate for the end point.
* @chainable
*/
lineTo: function()
{
this._lineTo.apply(this, [Y.Array(arguments), false]);
return this;
},
/**
* Draws a line segment from the current drawing position to the relative x and y coordinates.
*
* @method relativeLineTo
* @param {Number} point1 x-coordinate for the end point.
* @param {Number} point2 y-coordinate for the end point.
* @chainable
*/
relativeLineTo: function()
{
this._lineTo.apply(this, [Y.Array(arguments), true]);
return this;
},
/**
* Implements lineTo methods.
*
* @method _lineTo
* @param {Array} args The arguments to be used.
* @param {Boolean} relative Indicates whether or not to use relative coordinates.
* @private
*/
_lineTo: function(args, relative)
{
var point1 = args[0],
i,
len,
x,
y,
wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0,
relativeX = relative ? parseFloat(this._currentX) : 0,
relativeY = relative ? parseFloat(this._currentY) : 0;
if(!this._lineToMethods)
{
this._lineToMethods = [];
}
len = args.length - 1;
if (typeof point1 === 'string' || typeof point1 === 'number') {
for (i = 0; i < len; i = i + 2) {
x = parseFloat(args[i]);
y = parseFloat(args[i + 1]);
x = x + relativeX;
y = y + relativeY;
this._updateDrawingQueue(["lineTo", x, y]);
this._trackSize(x - wt, y - wt);
this._trackSize(x + wt, y + wt);
this._updateCoords(x, y);
}
}
else
{
for (i = 0; i < len; i = i + 1)
{
x = parseFloat(args[i][0]);
y = parseFloat(args[i][1]);
this._updateDrawingQueue(["lineTo", x, y]);
this._lineToMethods[this._lineToMethods.length] = this._methods[this._methods.length - 1];
this._trackSize(x - wt, y - wt);
this._trackSize(x + wt, y + wt);
this._updateCoords(x, y);
}
}
this._drawingComplete = false;
return this;
},
/**
* Moves the current drawing position to specified x and y coordinates.
*
* @method moveTo
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
* @chainable
*/
moveTo: function()
{
this._moveTo.apply(this, [Y.Array(arguments), false]);
return this;
},
/**
* Moves the current drawing position relative to specified x and y coordinates.
*
* @method relativeMoveTo
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
* @chainable
*/
relativeMoveTo: function()
{
this._moveTo.apply(this, [Y.Array(arguments), true]);
return this;
},
/**
* Implements moveTo methods.
*
* @method _moveTo
* @param {Array} args The arguments to be used.
* @param {Boolean} relative Indicates whether or not to use relative coordinates.
* @private
*/
_moveTo: function(args, relative) {
var wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0,
relativeX = relative ? parseFloat(this._currentX) : 0,
relativeY = relative ? parseFloat(this._currentY) : 0,
x = parseFloat(args[0]) + relativeX,
y = parseFloat(args[1]) + relativeY;
this._updateDrawingQueue(["moveTo", x, y]);
this._trackSize(x - wt, y - wt);
this._trackSize(x + wt, y + wt);
this._updateCoords(x, y);
this._drawingComplete = false;
return this;
},
/**
* Draws a bezier curve.
*
* @method curveTo
* @param {Number} cp1x x-coordinate for the first control point.
* @param {Number} cp1y y-coordinate for the first control point.
* @param {Number} cp2x x-coordinate for the second control point.
* @param {Number} cp2y y-coordinate for the second control point.
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
* @chainable
*/
curveTo: function() {
this._curveTo.apply(this, [Y.Array(arguments), false]);
return this;
},
/**
* Draws a bezier curve relative to the current coordinates.
*
* @method relativeCurveTo
* @param {Number} cp1x x-coordinate for the first control point.
* @param {Number} cp1y y-coordinate for the first control point.
* @param {Number} cp2x x-coordinate for the second control point.
* @param {Number} cp2y y-coordinate for the second control point.
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
* @chainable
*/
relativeCurveTo: function() {
this._curveTo.apply(this, [Y.Array(arguments), true]);
return this;
},
/**
* Implements curveTo methods.
*
* @method _curveTo
* @param {Array} args The arguments to be used.
* @param {Boolean} relative Indicates whether or not to use relative coordinates.
* @private
*/
_curveTo: function(args, relative) {
var w,
h,
cp1x,
cp1y,
cp2x,
cp2y,
x,
y,
pts,
right,
left,
bottom,
top,
i,
len,
relativeX = relative ? parseFloat(this._currentX) : 0,
relativeY = relative ? parseFloat(this._currentY) : 0;
len = args.length - 5;
for(i = 0; i < len; i = i + 6)
{
cp1x = parseFloat(args[i]) + relativeX;
cp1y = parseFloat(args[i + 1]) + relativeY;
cp2x = parseFloat(args[i + 2]) + relativeX;
cp2y = parseFloat(args[i + 3]) + relativeY;
x = parseFloat(args[i + 4]) + relativeX;
y = parseFloat(args[i + 5]) + relativeY;
this._updateDrawingQueue(["bezierCurveTo", cp1x, cp1y, cp2x, cp2y, x, y]);
this._drawingComplete = false;
right = Math.max(x, Math.max(cp1x, cp2x));
bottom = Math.max(y, Math.max(cp1y, cp2y));
left = Math.min(x, Math.min(cp1x, cp2x));
top = Math.min(y, Math.min(cp1y, cp2y));
w = Math.abs(right - left);
h = Math.abs(bottom - top);
pts = [[this._currentX, this._currentY] , [cp1x, cp1y], [cp2x, cp2y], [x, y]];
this._setCurveBoundingBox(pts, w, h);
this._currentX = x;
this._currentY = y;
}
},
/**
* Draws a quadratic bezier curve.
*
* @method quadraticCurveTo
* @param {Number} cpx x-coordinate for the control point.
* @param {Number} cpy y-coordinate for the control point.
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
* @chainable
*/
quadraticCurveTo: function() {
this._quadraticCurveTo.apply(this, [Y.Array(arguments), false]);
return this;
},
/**
* Draws a quadratic bezier curve relative to the current position.
*
* @method relativeQuadraticCurveTo
* @param {Number} cpx x-coordinate for the control point.
* @param {Number} cpy y-coordinate for the control point.
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
* @chainable
*/
relativeQuadraticCurveTo: function() {
this._quadraticCurveTo.apply(this, [Y.Array(arguments), true]);
return this;
},
/**
* Implements quadraticCurveTo methods.
*
* @method _quadraticCurveTo
* @param {Array} args The arguments to be used.
* @param {Boolean} relative Indicates whether or not to use relative coordinates.
* @private
*/
_quadraticCurveTo: function(args, relative) {
var cpx,
cpy,
x,
y,
w,
h,
pts,
right,
left,
bottom,
top,
i,
len = args.length - 3,
relativeX = relative ? parseFloat(this._currentX) : 0,
relativeY = relative ? parseFloat(this._currentY) : 0;
for(i = 0; i < len; i = i + 4)
{
cpx = parseFloat(args[i]) + relativeX;
cpy = parseFloat(args[i + 1]) + relativeY;
x = parseFloat(args[i + 2]) + relativeX;
y = parseFloat(args[i + 3]) + relativeY;
this._drawingComplete = false;
right = Math.max(x, cpx);
bottom = Math.max(y, cpy);
left = Math.min(x, cpx);
top = Math.min(y, cpy);
w = Math.abs(right - left);
h = Math.abs(bottom - top);
pts = [[this._currentX, this._currentY] , [cpx, cpy], [x, y]];
this._setCurveBoundingBox(pts, w, h);
this._updateDrawingQueue(["quadraticCurveTo", cpx, cpy, x, y]);
this._updateCoords(x, y);
}
return this;
},
/**
* Draws a circle. Used internally by `CanvasCircle` class.
*
* @method drawCircle
* @param {Number} x y-coordinate
* @param {Number} y x-coordinate
* @param {Number} r radius
* @chainable
* @protected
*/
drawCircle: function(x, y, radius) {
var startAngle = 0,
endAngle = 2 * Math.PI,
wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0,
circum = radius * 2;
circum += wt;
this._drawingComplete = false;
this._trackSize(x + circum, y + circum);
this._trackSize(x - wt, y - wt);
this._updateCoords(x, y);
this._updateDrawingQueue(["arc", x + radius, y + radius, radius, startAngle, endAngle, false]);
return this;
},
/**
* Draws a diamond.
*
* @method drawDiamond
* @param {Number} x y-coordinate
* @param {Number} y x-coordinate
* @param {Number} width width
* @param {Number} height height
* @chainable
* @protected
*/
drawDiamond: function(x, y, width, height)
{
var midWidth = width * 0.5,
midHeight = height * 0.5;
this.moveTo(x + midWidth, y);
this.lineTo(x + width, y + midHeight);
this.lineTo(x + midWidth, y + height);
this.lineTo(x, y + midHeight);
this.lineTo(x + midWidth, y);
return this;
},
/**
* Draws an ellipse. Used internally by `CanvasEllipse` class.
*
* @method drawEllipse
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @param {Number} w width
* @param {Number} h height
* @chainable
* @protected
*/
drawEllipse: function(x, y, w, h) {
var l = 8,
theta = -(45/180) * Math.PI,
angle = 0,
angleMid,
radius = w/2,
yRadius = h/2,
i,
centerX = x + radius,
centerY = y + yRadius,
ax, ay, bx, by, cx, cy,
wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0;
ax = centerX + Math.cos(0) * radius;
ay = centerY + Math.sin(0) * yRadius;
this.moveTo(ax, ay);
for(i = 0; i < l; i++)
{
angle += theta;
angleMid = angle - (theta / 2);
bx = centerX + Math.cos(angle) * radius;
by = centerY + Math.sin(angle) * yRadius;
cx = centerX + Math.cos(angleMid) * (radius / Math.cos(theta / 2));
cy = centerY + Math.sin(angleMid) * (yRadius / Math.cos(theta / 2));
this._updateDrawingQueue(["quadraticCurveTo", cx, cy, bx, by]);
}
this._trackSize(x + w + wt, y + h + wt);
this._trackSize(x - wt, y - wt);
this._updateCoords(x, y);
return this;
},
/**
* Draws a rectangle.
*
* @method drawRect
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @param {Number} w width
* @param {Number} h height
* @chainable
*/
drawRect: function(x, y, w, h) {
this._drawingComplete = false;
this.moveTo(x, y);
this.lineTo(x + w, y);
this.lineTo(x + w, y + h);
this.lineTo(x, y + h);
this.lineTo(x, y);
return this;
},
/**
* Draws a rectangle with rounded corners.
*
* @method drawRect
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @param {Number} w width
* @param {Number} h height
* @param {Number} ew width of the ellipse used to draw the rounded corners
* @param {Number} eh height of the ellipse used to draw the rounded corners
* @chainable
*/
drawRoundRect: function(x, y, w, h, ew, eh) {
this._drawingComplete = false;
this.moveTo( x, y + eh);
this.lineTo(x, y + h - eh);
this.quadraticCurveTo(x, y + h, x + ew, y + h);
this.lineTo(x + w - ew, y + h);
this.quadraticCurveTo(x + w, y + h, x + w, y + h - eh);
this.lineTo(x + w, y + eh);
this.quadraticCurveTo(x + w, y, x + w - ew, y);
this.lineTo(x + ew, y);
this.quadraticCurveTo(x, y, x, y + eh);
return this;
},
/**
* Draws a wedge.
*
* @method drawWedge
* @param {Number} x x-coordinate of the wedge's center point
* @param {Number} y y-coordinate of the wedge's center point
* @param {Number} startAngle starting angle in degrees
* @param {Number} arc sweep of the wedge. Negative values draw clockwise.
* @param {Number} radius radius of wedge. If [optional] yRadius is defined, then radius is the x radius.
* @param {Number} yRadius [optional] y radius for wedge.
* @chainable
* @private
*/
drawWedge: function(x, y, startAngle, arc, radius, yRadius)
{
var wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0,
segs,
segAngle,
theta,
angle,
angleMid,
ax,
ay,
bx,
by,
cx,
cy,
i = 0;
yRadius = yRadius || radius;
this._drawingComplete = false;
// move to x,y position
this._updateDrawingQueue(["moveTo", x, y]);
yRadius = yRadius || radius;
// limit sweep to reasonable numbers
if(Math.abs(arc) > 360)
{
arc = 360;
}
// First we calculate how many segments are needed
// for a smooth arc.
segs = Math.ceil(Math.abs(arc) / 45);
// Now calculate the sweep of each segment.
segAngle = arc / segs;
// The math requires radians rather than degrees. To convert from degrees
// use the formula (degrees/180)*Math.PI to get radians.
theta = -(segAngle / 180) * Math.PI;
// convert angle startAngle to radians
angle = (startAngle / 180) * Math.PI;
// draw the curve in segments no larger than 45 degrees.
if(segs > 0)
{
// draw a line from the center to the start of the curve
ax = x + Math.cos(startAngle / 180 * Math.PI) * radius;
ay = y + Math.sin(startAngle / 180 * Math.PI) * yRadius;
this.lineTo(ax, ay);
// Loop for drawing curve segments
for(i = 0; i < segs; ++i)
{
angle += theta;
angleMid = angle - (theta / 2);
bx = x + Math.cos(angle) * radius;
by = y + Math.sin(angle) * yRadius;
cx = x + Math.cos(angleMid) * (radius / Math.cos(theta / 2));
cy = y + Math.sin(angleMid) * (yRadius / Math.cos(theta / 2));
this._updateDrawingQueue(["quadraticCurveTo", cx, cy, bx, by]);
}
// close the wedge by drawing a line to the center
this._updateDrawingQueue(["lineTo", x, y]);
}
this._trackSize(-wt , -wt);
this._trackSize((radius * 2) + wt, (radius * 2) + wt);
return this;
},
/**
* Completes a drawing operation.
*
* @method end
* @chainable
*/
end: function() {
this._closePath();
return this;
},
/**
* Ends a fill and stroke
*
* @method closePath
* @chainable
*/
closePath: function()
{
this._updateDrawingQueue(["closePath"]);
this._updateDrawingQueue(["beginPath"]);
return this;
},
/**
* Clears the graphics object.
*
* @method clear
* @chainable
*/
clear: function() {
this._initProps();
if(this.node)
{
this._context.clearRect(0, 0, this.node.width, this.node.height);
}
return this;
},
/**
* Returns a linear gradient fill
*
* @method _getLinearGradient
* @return CanvasGradient
* @private
*/
_getLinearGradient: function() {
var isNumber = Y.Lang.isNumber,
fill = this.get("fill"),
stops = fill.stops,
opacity,
color,
stop,
i,
len = stops.length,
gradient,
x = 0,
y = 0,
w = this.get("width"),
h = this.get("height"),
r = fill.rotation || 0,
x1, x2, y1, y2,
cx = x + w/2,
cy = y + h/2,
offset,
radCon = Math.PI/180,
tanRadians = parseFloat(parseFloat(Math.tan(r * radCon)).toFixed(8));
if(Math.abs(tanRadians) * w/2 >= h/2)
{
if(r < 180)
{
y1 = y;
y2 = y + h;
}
else
{
y1 = y + h;
y2 = y;
}
x1 = cx - ((cy - y1)/tanRadians);
x2 = cx - ((cy - y2)/tanRadians);
}
else
{
if(r > 90 && r < 270)
{
x1 = x + w;
x2 = x;
}
else
{
x1 = x;
x2 = x + w;
}
y1 = ((tanRadians * (cx - x1)) - cy) * -1;
y2 = ((tanRadians * (cx - x2)) - cy) * -1;
}
gradient = this._context.createLinearGradient(x1, y1, x2, y2);
for(i = 0; i < len; ++i)
{
stop = stops[i];
opacity = stop.opacity;
color = stop.color;
offset = stop.offset;
if(isNumber(opacity))
{
opacity = Math.max(0, Math.min(1, opacity));
color = this._toRGBA(color, opacity);
}
else
{
color = TORGB(color);
}
offset = stop.offset || i/(len - 1);
gradient.addColorStop(offset, color);
}
return gradient;
},
/**
* Returns a radial gradient fill
*
* @method _getRadialGradient
* @return CanvasGradient
* @private
*/
_getRadialGradient: function() {
var isNumber = Y.Lang.isNumber,
fill = this.get("fill"),
r = fill.r,
fx = fill.fx,
fy = fill.fy,
stops = fill.stops,
opacity,
color,
stop,
i,
len = stops.length,
gradient,
x = 0,
y = 0,
w = this.get("width"),
h = this.get("height"),
x1, x2, y1, y2, r2,
xc, yc, xn, yn, d,
offset,
ratio,
stopMultiplier;
xc = x + w/2;
yc = y + h/2;
x1 = w * fx;
y1 = h * fy;
x2 = x + w/2;
y2 = y + h/2;
r2 = w * r;
d = Math.sqrt( Math.pow(Math.abs(xc - x1), 2) + Math.pow(Math.abs(yc - y1), 2) );
if(d >= r2)
{
ratio = d/r2;
//hack. gradient won't show if it is exactly on the edge of the arc
if(ratio === 1)
{
ratio = 1.01;
}
xn = (x1 - xc)/ratio;
yn = (y1 - yc)/ratio;
xn = xn > 0 ? Math.floor(xn) : Math.ceil(xn);
yn = yn > 0 ? Math.floor(yn) : Math.ceil(yn);
x1 = xc + xn;
y1 = yc + yn;
}
//If the gradient radius is greater than the circle's, adjusting the radius stretches the gradient properly.
//If the gradient radius is less than the circle's, adjusting the radius of the gradient will not work.
//Instead, adjust the color stops to reflect the smaller radius.
if(r >= 0.5)
{
gradient = this._context.createRadialGradient(x1, y1, r, x2, y2, r * w);
stopMultiplier = 1;
}
else
{
gradient = this._context.createRadialGradient(x1, y1, r, x2, y2, w/2);
stopMultiplier = r * 2;
}
for(i = 0; i < len; ++i)
{
stop = stops[i];
opacity = stop.opacity;
color = stop.color;
offset = stop.offset;
if(isNumber(opacity))
{
opacity = Math.max(0, Math.min(1, opacity));
color = this._toRGBA(color, opacity);
}
else
{
color = TORGB(color);
}
offset = stop.offset || i/(len - 1);
offset *= stopMultiplier;
if(offset <= 1)
{
gradient.addColorStop(offset, color);
}
}
return gradient;
},
/**
* Clears all values
*
* @method _initProps
* @private
*/
_initProps: function() {
this._methods = [];
this._lineToMethods = [];
this._xcoords = [0];
this._ycoords = [0];
this._width = 0;
this._height = 0;
this._left = 0;
this._top = 0;
this._right = 0;
this._bottom = 0;
this._currentX = 0;
this._currentY = 0;
},
/**
* Indicates a drawing has completed.
*
* @property _drawingComplete
* @type Boolean
* @private
*/
_drawingComplete: false,
/**
* Creates canvas element
*
* @method _createGraphic
* @return HTMLCanvasElement
* @private
*/
_createGraphic: function() {
var graphic = Y.config.doc.createElement('canvas');
return graphic;
},
/**
* Returns the points on a curve
*
* @method getBezierData
* @param Array points Array containing the begin, end and control points of a curve.
* @param Number t The value for incrementing the next set of points.
* @return Array
* @private
*/
getBezierData: function(points, t) {
var n = points.length,
tmp = [],
i,
j;
for (i = 0; i < n; ++i){
tmp[i] = [points[i][0], points[i][1]]; // save input
}
for (j = 1; j < n; ++j) {
for (i = 0; i < n - j; ++i) {
tmp[i][0] = (1 - t) * tmp[i][0] + t * tmp[parseInt(i + 1, 10)][0];
tmp[i][1] = (1 - t) * tmp[i][1] + t * tmp[parseInt(i + 1, 10)][1];
}
}
return [ tmp[0][0], tmp[0][1] ];
},
/**
* Calculates the bounding box for a curve
*
* @method _setCurveBoundingBox
* @param Array pts Array containing points for start, end and control points of a curve.
* @param Number w Width used to calculate the number of points to describe the curve.
* @param Number h Height used to calculate the number of points to describe the curve.
* @private
*/
_setCurveBoundingBox: function(pts, w, h)
{
var i = 0,
left = this._currentX,
right = left,
top = this._currentY,
bottom = top,
len = Math.round(Math.sqrt((w * w) + (h * h))),
t = 1/len,
wt = this._stroke && this._strokeWeight ? this._strokeWeight : 0,
xy;
for(i = 0; i < len; ++i)
{
xy = this.getBezierData(pts, t * i);
left = isNaN(left) ? xy[0] : Math.min(xy[0], left);
right = isNaN(right) ? xy[0] : Math.max(xy[0], right);
top = isNaN(top) ? xy[1] : Math.min(xy[1], top);
bottom = isNaN(bottom) ? xy[1] : Math.max(xy[1], bottom);
}
left = Math.round(left * 10)/10;
right = Math.round(right * 10)/10;
top = Math.round(top * 10)/10;
bottom = Math.round(bottom * 10)/10;
this._trackSize(right + wt, bottom + wt);
this._trackSize(left - wt, top - wt);
},
/**
* Updates the size of the graphics object
*
* @method _trackSize
* @param {Number} w width
* @param {Number} h height
* @private
*/
_trackSize: function(w, h) {
if (w > this._right) {
this._right = w;
}
if(w < this._left)
{
this._left = w;
}
if (h < this._top)
{
this._top = h;
}
if (h > this._bottom)
{
this._bottom = h;
}
this._width = this._right - this._left;
this._height = this._bottom - this._top;
}
};
Y.CanvasDrawing = CanvasDrawing;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Shape.html">`Shape`</a> class.
* `CanvasShape` is not intended to be used directly. Instead, use the <a href="Shape.html">`Shape`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Shape.html">`Shape`</a>
* class will point to the `CanvasShape` class.
*
* @module graphics
* @class CanvasShape
* @constructor
*/
CanvasShape = function()
{
this._transforms = [];
this.matrix = new Y.Matrix();
CanvasShape.superclass.constructor.apply(this, arguments);
};
CanvasShape.NAME = "shape";
Y.extend(CanvasShape, Y.GraphicBase, Y.mix({
/**
* Init method, invoked during construction.
* Calls `initializer` method.
*
* @method init
* @protected
*/
init: function()
{
this.initializer.apply(this, arguments);
},
/**
* Initializes the shape
*
* @private
* @method _initialize
*/
initializer: function(cfg)
{
var host = this,
graphic = cfg.graphic,
data = this.get("data");
host._initProps();
host.createNode();
host._xcoords = [0];
host._ycoords = [0];
if(graphic)
{
this._setGraphic(graphic);
}
if(data)
{
host._parsePathData(data);
}
host._updateHandler();
},
/**
* Set the Graphic instance for the shape.
*
* @method _setGraphic
* @param {Graphic | Node | HTMLElement | String} render This param is used to determine the graphic instance. If it is a
* `Graphic` instance, it will be assigned to the `graphic` attribute. Otherwise, a new Graphic instance will be created
* and rendered into the dom element that the render represents.
* @private
*/
_setGraphic: function(render)
{
var graphic;
if(render instanceof Y.CanvasGraphic)
{
this._graphic = render;
}
else
{
graphic = new Y.CanvasGraphic({
render: render
});
graphic._appendShape(this);
this._graphic = graphic;
}
},
/**
* Add a class name to each node.
*
* @method addClass
* @param {String} className the class name to add to the node's class attribute
*/
addClass: function(className)
{
var node = this.get("node");
Y.DOM.addClass(node, className);
},
/**
* Removes a class name from each node.
*
* @method removeClass
* @param {String} className the class name to remove from the node's class attribute
*/
removeClass: function(className)
{
var node = this.get("node");
Y.DOM.removeClass(node, className);
},
/**
* Gets the current position of the node in page coordinates.
*
* @method getXY
* @return Array The XY position of the shape.
*/
getXY: function()
{
var graphic = this.get("graphic"),
parentXY = graphic.getXY(),
x = this.get("x"),
y = this.get("y");
return [parentXY[0] + x, parentXY[1] + y];
},
/**
* Set the position of the shape in page coordinates, regardless of how the node is positioned.
*
* @method setXY
* @param {Array} Contains X & Y values for new position (coordinates are page-based)
*/
setXY: function(xy)
{
var graphic = this.get("graphic"),
parentXY = graphic.getXY(),
x = xy[0] - parentXY[0],
y = xy[1] - parentXY[1];
this._set("x", x);
this._set("y", y);
this._updateNodePosition(x, y);
},
/**
* Determines whether the node is an ancestor of another HTML element in the DOM hierarchy.
*
* @method contains
* @param {CanvasShape | HTMLElement} needle The possible node or descendent
* @return Boolean Whether or not this shape is the needle or its ancestor.
*/
contains: function(needle)
{
var node = needle instanceof Y.Node ? needle._node : needle;
return node === this.node;
},
/**
* Test if the supplied node matches the supplied selector.
*
* @method test
* @param {String} selector The CSS selector to test against.
* @return Boolean Wheter or not the shape matches the selector.
*/
test: function(selector)
{
return Y.Selector.test(this.node, selector);
},
/**
* Compares nodes to determine if they match.
* Node instances can be compared to each other and/or HTMLElements.
* @method compareTo
* @param {HTMLElement | Node} refNode The reference node to compare to the node.
* @return {Boolean} True if the nodes match, false if they do not.
*/
compareTo: function(refNode) {
var node = this.node;
return node === refNode;
},
/**
* Value function for fill attribute
*
* @method _getDefaultFill
* @return Object
* @private
*/
_getDefaultFill: function() {
return {
type: "solid",
opacity: 1,
cx: 0.5,
cy: 0.5,
fx: 0.5,
fy: 0.5,
r: 0.5
};
},
/**
* Value function for stroke attribute
*
* @method _getDefaultStroke
* @return Object
* @private
*/
_getDefaultStroke: function()
{
return {
weight: 1,
dashstyle: "none",
color: "#000",
opacity: 1.0
};
},
/**
* Left edge of the path
*
* @property _left
* @type Number
* @private
*/
_left: 0,
/**
* Right edge of the path
*
* @property _right
* @type Number
* @private
*/
_right: 0,
/**
* Top edge of the path
*
* @property _top
* @type Number
* @private
*/
_top: 0,
/**
* Bottom edge of the path
*
* @property _bottom
* @type Number
* @private
*/
_bottom: 0,
/**
* Creates the dom node for the shape.
*
* @method createNode
* @return HTMLElement
* @private
*/
createNode: function()
{
var host = this,
node = Y.config.doc.createElement('canvas'),
id = host.get("id"),
concat = host._camelCaseConcat,
name = host.name;
host._context = node.getContext('2d');
node.setAttribute("overflow", "visible");
node.style.overflow = "visible";
if(!host.get("visible"))
{
node.style.visibility = "hidden";
}
node.setAttribute("id", id);
id = "#" + id;
host.node = node;
host.addClass(
_getClassName(SHAPE) +
" " +
_getClassName(concat(IMPLEMENTATION, SHAPE)) +
" " +
_getClassName(name) +
" " +
_getClassName(concat(IMPLEMENTATION, name))
);
},
/**
* Overrides default `on` method. Checks to see if its a dom interaction event. If so,
* return an event attached to the `node` element. If not, return the normal functionality.
*
* @method on
* @param {String} type event type
* @param {Object} callback function
* @private
*/
on: function(type, fn)
{
if(Y.Node.DOM_EVENTS[type])
{
return Y.on(type, fn, "#" + this.get("id"));
}
return Y.on.apply(this, arguments);
},
/**
* Adds a stroke to the shape node.
*
* @method _strokeChangeHandler
* @param {Object} stroke Properties of the `stroke` attribute.
* @private
*/
_setStrokeProps: function(stroke)
{
var color,
weight,
opacity,
linejoin,
linecap,
dashstyle;
if(stroke)
{
color = stroke.color;
weight = PARSE_FLOAT(stroke.weight);
opacity = PARSE_FLOAT(stroke.opacity);
linejoin = stroke.linejoin || "round";
linecap = stroke.linecap || "butt";
dashstyle = stroke.dashstyle;
this._miterlimit = null;
this._dashstyle = (dashstyle && Y.Lang.isArray(dashstyle) && dashstyle.length > 1) ? dashstyle : null;
this._strokeWeight = weight;
if (IS_NUMBER(weight) && weight > 0)
{
this._stroke = 1;
}
else
{
this._stroke = 0;
}
if (IS_NUMBER(opacity)) {
this._strokeStyle = this._toRGBA(color, opacity);
}
else
{
this._strokeStyle = color;
}
this._linecap = linecap;
if(linejoin === "round" || linejoin === "bevel")
{
this._linejoin = linejoin;
}
else
{
linejoin = parseInt(linejoin, 10);
if(IS_NUMBER(linejoin))
{
this._miterlimit = Math.max(linejoin, 1);
this._linejoin = "miter";
}
}
}
else
{
this._stroke = 0;
}
},
/**
* Sets the value of an attribute.
*
* @method set
* @param {String|Object} name The name of the attribute. Alternatively, an object of key value pairs can
* be passed in to set multiple attributes at once.
* @param {Any} value The value to set the attribute to. This value is ignored if an object is received as
* the name param.
*/
set: function()
{
var host = this;
AttributeLite.prototype.set.apply(host, arguments);
if(host.initialized)
{
host._updateHandler();
}
},
/**
* Adds a fill to the shape node.
*
* @method _setFillProps
* @param {Object} fill Properties of the `fill` attribute.
* @private
*/
_setFillProps: function(fill)
{
var isNumber = IS_NUMBER,
color,
opacity,
type;
if(fill)
{
color = fill.color;
type = fill.type;
if(type === "linear" || type === "radial")
{
this._fillType = type;
}
else if(color)
{
opacity = fill.opacity;
if (isNumber(opacity))
{
opacity = Math.max(0, Math.min(1, opacity));
color = this._toRGBA(color, opacity);
}
else
{
color = TORGB(color);
}
this._fillColor = color;
this._fillType = 'solid';
}
else
{
this._fillColor = null;
}
}
else
{
this._fillType = null;
this._fillColor = null;
}
},
/**
* Specifies a 2d translation.
*
* @method translate
* @param {Number} x The value to transate on the x-axis.
* @param {Number} y The value to translate on the y-axis.
*/
translate: function(x, y)
{
this._translateX += x;
this._translateY += y;
this._addTransform("translate", arguments);
},
/**
* Translates the shape along the x-axis. When translating x and y coordinates,
* use the `translate` method.
*
* @method translateX
* @param {Number} x The value to translate.
*/
translateX: function(x)
{
this._translateX += x;
this._addTransform("translateX", arguments);
},
/**
* Performs a translate on the y-coordinate. When translating x and y coordinates,
* use the `translate` method.
*
* @method translateY
* @param {Number} y The value to translate.
*/
translateY: function(y)
{
this._translateY += y;
this._addTransform("translateY", arguments);
},
/**
* Skews the shape around the x-axis and y-axis.
*
* @method skew
* @param {Number} x The value to skew on the x-axis.
* @param {Number} y The value to skew on the y-axis.
*/
skew: function()
{
this._addTransform("skew", arguments);
},
/**
* Skews the shape around the x-axis.
*
* @method skewX
* @param {Number} x x-coordinate
*/
skewX: function()
{
this._addTransform("skewX", arguments);
},
/**
* Skews the shape around the y-axis.
*
* @method skewY
* @param {Number} y y-coordinate
*/
skewY: function()
{
this._addTransform("skewY", arguments);
},
/**
* Rotates the shape clockwise around it transformOrigin.
*
* @method rotate
* @param {Number} deg The degree of the rotation.
*/
rotate: function()
{
this._addTransform("rotate", arguments);
},
/**
* Specifies a 2d scaling operation.
*
* @method scale
* @param {Number} val
*/
scale: function()
{
this._addTransform("scale", arguments);
},
/**
* Storage for the transform attribute.
*
* @property _transform
* @type String
* @private
*/
_transform: "",
/**
* Adds a transform to the shape.
*
* @method _addTransform
* @param {String} type The transform being applied.
* @param {Array} args The arguments for the transform.
* @private
*/
_addTransform: function(type, args)
{
args = Y.Array(args);
this._transform = Y_LANG.trim(this._transform + " " + type + "(" + args.join(", ") + ")");
args.unshift(type);
this._transforms.push(args);
if(this.initialized)
{
this._updateTransform();
}
},
/**
* Applies all transforms.
*
* @method _updateTransform
* @private
*/
_updateTransform: function()
{
var node = this.node,
key,
transform,
transformOrigin = this.get("transformOrigin"),
matrix = this.matrix,
i,
len = this._transforms.length;
if(this._transforms && this._transforms.length > 0)
{
for(i = 0; i < len; ++i)
{
key = this._transforms[i].shift();
if(key)
{
matrix[key].apply(matrix, this._transforms[i]);
}
}
transform = matrix.toCSSText();
}
this._graphic.addToRedrawQueue(this);
transformOrigin = (100 * transformOrigin[0]) + "% " + (100 * transformOrigin[1]) + "%";
Y_DOM.setStyle(node, "transformOrigin", transformOrigin);
if(transform)
{
Y_DOM.setStyle(node, "transform", transform);
}
this._transforms = [];
},
/**
* Updates `Shape` based on attribute changes.
*
* @method _updateHandler
* @private
*/
_updateHandler: function()
{
this._draw();
this._updateTransform();
},
/**
* Updates the shape.
*
* @method _draw
* @private
*/
_draw: function()
{
var node = this.node;
this.clear();
this._closePath();
node.style.left = this.get("x") + "px";
node.style.top = this.get("y") + "px";
},
/**
* Completes a shape or drawing
*
* @method _closePath
* @private
*/
_closePath: function()
{
if(!this._methods)
{
return;
}
var node = this.get("node"),
w = this._right - this._left,
h = this._bottom - this._top,
context = this._context,
methods = [],
cachedMethods = this._methods.concat(),
i,
j,
method,
args,
argsLen,
len = 0;
this._context.clearRect(0, 0, node.width, node.height);
if(this._methods)
{
len = cachedMethods.length;
if(!len || len < 1)
{
return;
}
for(i = 0; i < len; ++i)
{
methods[i] = cachedMethods[i].concat();
args = methods[i];
argsLen = (args[0] === "quadraticCurveTo" || args[0] === "bezierCurveTo") ? args.length : 3;
for(j = 1; j < argsLen; ++j)
{
if(j % 2 === 0)
{
args[j] = args[j] - this._top;
}
else
{
args[j] = args[j] - this._left;
}
}
}
node.setAttribute("width", Math.min(w, 2000));
node.setAttribute("height", Math.min(2000, h));
context.beginPath();
for(i = 0; i < len; ++i)
{
args = methods[i].concat();
if(args && args.length > 0)
{
method = args.shift();
if(method)
{
if(method === "closePath")
{
context.closePath();
this._strokeAndFill(context);
}
else if(method && method === "lineTo" && this._dashstyle)
{
args.unshift(this._xcoords[i] - this._left, this._ycoords[i] - this._top);
this._drawDashedLine.apply(this, args);
}
else
{
context[method].apply(context, args);
}
}
}
}
this._strokeAndFill(context);
this._drawingComplete = true;
this._clearAndUpdateCoords();
this._updateNodePosition();
this._methods = cachedMethods;
}
},
/**
* Completes a stroke and/or fill operation on the context.
*
* @method _strokeAndFill
* @param {Context} Reference to the context element of the canvas instance.
* @private
*/
_strokeAndFill: function(context)
{
if (this._fillType)
{
if(this._fillType === "linear")
{
context.fillStyle = this._getLinearGradient();
}
else if(this._fillType === "radial")
{
context.fillStyle = this._getRadialGradient();
}
else
{
context.fillStyle = this._fillColor;
}
context.closePath();
context.fill();
}
if (this._stroke) {
if(this._strokeWeight)
{
context.lineWidth = this._strokeWeight;
}
context.lineCap = this._linecap;
context.lineJoin = this._linejoin;
if(this._miterlimit)
{
context.miterLimit = this._miterlimit;
}
context.strokeStyle = this._strokeStyle;
context.stroke();
}
},
/**
* Draws a dashed line between two points.
*
* @method _drawDashedLine
* @param {Number} xStart The x position of the start of the line
* @param {Number} yStart The y position of the start of the line
* @param {Number} xEnd The x position of the end of the line
* @param {Number} yEnd The y position of the end of the line
* @private
*/
_drawDashedLine: function(xStart, yStart, xEnd, yEnd)
{
var context = this._context,
dashsize = this._dashstyle[0],
gapsize = this._dashstyle[1],
segmentLength = dashsize + gapsize,
xDelta = xEnd - xStart,
yDelta = yEnd - yStart,
delta = Math.sqrt(Math.pow(xDelta, 2) + Math.pow(yDelta, 2)),
segmentCount = Math.floor(Math.abs(delta / segmentLength)),
radians = Math.atan2(yDelta, xDelta),
xCurrent = xStart,
yCurrent = yStart,
i;
xDelta = Math.cos(radians) * segmentLength;
yDelta = Math.sin(radians) * segmentLength;
for(i = 0; i < segmentCount; ++i)
{
context.moveTo(xCurrent, yCurrent);
context.lineTo(xCurrent + Math.cos(radians) * dashsize, yCurrent + Math.sin(radians) * dashsize);
xCurrent += xDelta;
yCurrent += yDelta;
}
context.moveTo(xCurrent, yCurrent);
delta = Math.sqrt((xEnd - xCurrent) * (xEnd - xCurrent) + (yEnd - yCurrent) * (yEnd - yCurrent));
if(delta > dashsize)
{
context.lineTo(xCurrent + Math.cos(radians) * dashsize, yCurrent + Math.sin(radians) * dashsize);
}
else if(delta > 0)
{
context.lineTo(xCurrent + Math.cos(radians) * delta, yCurrent + Math.sin(radians) * delta);
}
context.moveTo(xEnd, yEnd);
},
/**
* Returns the bounds for a shape.
*
* Calculates the a new bounding box from the original corner coordinates (base on size and position) and the transform matrix.
* The calculated bounding box is used by the graphic instance to calculate its viewBox.
*
* @method getBounds
* @return Object
*/
getBounds: function()
{
var type = this._type,
w = this.get("width"),
h = this.get("height"),
x = this.get("x"),
y = this.get("y");
if(type === "path")
{
x = x + this._left;
y = y + this._top;
w = this._right - this._left;
h = this._bottom - this._top;
}
return this._getContentRect(w, h, x, y);
},
/**
* Calculates the bounding box for the shape.
*
* @method _getContentRect
* @param {Number} w width of the shape
* @param {Number} h height of the shape
* @param {Number} x x-coordinate of the shape
* @param {Number} y y-coordinate of the shape
* @private
*/
_getContentRect: function(w, h, x, y)
{
var transformOrigin = this.get("transformOrigin"),
transformX = transformOrigin[0] * w,
transformY = transformOrigin[1] * h,
transforms = this.matrix.getTransformArray(this.get("transform")),
matrix = new Y.Matrix(),
i,
len = transforms.length,
transform,
key,
contentRect;
if(this._type === "path")
{
transformX = transformX + x;
transformY = transformY + y;
}
transformX = !isNaN(transformX) ? transformX : 0;
transformY = !isNaN(transformY) ? transformY : 0;
matrix.translate(transformX, transformY);
for(i = 0; i < len; i = i + 1)
{
transform = transforms[i];
key = transform.shift();
if(key)
{
matrix[key].apply(matrix, transform);
}
}
matrix.translate(-transformX, -transformY);
contentRect = matrix.getContentRect(w, h, x, y);
return contentRect;
},
/**
* Places the shape above all other shapes.
*
* @method toFront
*/
toFront: function()
{
var graphic = this.get("graphic");
if(graphic)
{
graphic._toFront(this);
}
},
/**
* Places the shape underneath all other shapes.
*
* @method toFront
*/
toBack: function()
{
var graphic = this.get("graphic");
if(graphic)
{
graphic._toBack(this);
}
},
/**
* Parses path data string and call mapped methods.
*
* @method _parsePathData
* @param {String} val The path data
* @private
*/
_parsePathData: function(val)
{
var method,
methodSymbol,
args,
commandArray = Y.Lang.trim(val.match(SPLITPATHPATTERN)),
i,
len,
str,
symbolToMethod = this._pathSymbolToMethod;
if(commandArray)
{
this.clear();
len = commandArray.length || 0;
for(i = 0; i < len; i = i + 1)
{
str = commandArray[i];
methodSymbol = str.substr(0, 1);
args = str.substr(1).match(SPLITARGSPATTERN);
method = symbolToMethod[methodSymbol];
if(method)
{
if(args)
{
this[method].apply(this, args);
}
else
{
this[method].apply(this);
}
}
}
this.end();
}
},
/**
* Destroys the shape instance.
*
* @method destroy
*/
destroy: function()
{
var graphic = this.get("graphic");
if(graphic)
{
graphic.removeShape(this);
}
else
{
this._destroy();
}
},
/**
* Implementation for shape destruction
*
* @method destroy
* @protected
*/
_destroy: function()
{
if(this.node)
{
Y.Event.purgeElement(this.node, true);
if(this.node.parentNode)
{
this.node.style.visibility = "";
this.node.parentNode.removeChild(this.node);
}
this._context = null;
this.node = null;
}
}
}, Y.CanvasDrawing.prototype));
CanvasShape.ATTRS = {
/**
* An array of x, y values which indicates the transformOrigin in which to rotate the shape. Valid values range between 0 and 1 representing a
* fraction of the shape's corresponding bounding box dimension. The default value is [0.5, 0.5].
*
* @config transformOrigin
* @type Array
*/
transformOrigin: {
valueFn: function()
{
return [0.5, 0.5];
}
},
/**
* <p>A string containing, in order, transform operations applied to the shape instance. The `transform` string can contain the following values:
*
* <dl>
* <dt>rotate</dt><dd>Rotates the shape clockwise around it transformOrigin.</dd>
* <dt>translate</dt><dd>Specifies a 2d translation.</dd>
* <dt>skew</dt><dd>Skews the shape around the x-axis and y-axis.</dd>
* <dt>scale</dt><dd>Specifies a 2d scaling operation.</dd>
* <dt>translateX</dt><dd>Translates the shape along the x-axis.</dd>
* <dt>translateY</dt><dd>Translates the shape along the y-axis.</dd>
* <dt>skewX</dt><dd>Skews the shape around the x-axis.</dd>
* <dt>skewY</dt><dd>Skews the shape around the y-axis.</dd>
* <dt>matrix</dt><dd>Specifies a 2D transformation matrix comprised of the specified six values.</dd>
* </dl>
* </p>
* <p>Applying transforms through the transform attribute will reset the transform matrix and apply a new transform. The shape class also contains
* corresponding methods for each transform that will apply the transform to the current matrix. The below code illustrates how you might use the
* `transform` attribute to instantiate a recangle with a rotation of 45 degrees.</p>
var myRect = new Y.Rect({
type:"rect",
width: 50,
height: 40,
transform: "rotate(45)"
};
* <p>The code below would apply `translate` and `rotate` to an existing shape.</p>
myRect.set("transform", "translate(40, 50) rotate(45)");
* @config transform
* @type String
*/
transform: {
setter: function(val)
{
this.matrix.init();
this._transforms = this.matrix.getTransformArray(val);
this._transform = val;
return val;
},
getter: function()
{
return this._transform;
}
},
/**
* Dom node for the shape
*
* @config node
* @type HTMLElement
* @readOnly
*/
node: {
readOnly: true,
getter: function()
{
return this.node;
}
},
/**
* Unique id for class instance.
*
* @config id
* @type String
*/
id: {
valueFn: function()
{
return Y.guid();
},
setter: function(val)
{
var node = this.node;
if(node)
{
node.setAttribute("id", val);
}
return val;
}
},
/**
* Indicates the width of the shape
*
* @config width
* @type Number
*/
width: {
value: 0
},
/**
* Indicates the height of the shape
*
* @config height
* @type Number
*/
height: {
value: 0
},
/**
* Indicates the x position of shape.
*
* @config x
* @type Number
*/
x: {
value: 0
},
/**
* Indicates the y position of shape.
*
* @config y
* @type Number
*/
y: {
value: 0
},
/**
* Indicates whether the shape is visible.
*
* @config visible
* @type Boolean
*/
visible: {
value: true,
setter: function(val){
var node = this.get("node"),
visibility = val ? "visible" : "hidden";
if(node)
{
node.style.visibility = visibility;
}
return val;
}
},
/**
* Contains information about the fill of the shape.
* <dl>
* <dt>color</dt><dd>The color of the fill.</dd>
* <dt>opacity</dt><dd>Number between 0 and 1 that indicates the opacity of the fill. The default value is 1.</dd>
* <dt>type</dt><dd>Type of fill.
* <dl>
* <dt>solid</dt><dd>Solid single color fill. (default)</dd>
* <dt>linear</dt><dd>Linear gradient fill.</dd>
* <dt>radial</dt><dd>Radial gradient fill.</dd>
* </dl>
* </dd>
* </dl>
* <p>If a `linear` or `radial` is specified as the fill type. The following additional property is used:
* <dl>
* <dt>stops</dt><dd>An array of objects containing the following properties:
* <dl>
* <dt>color</dt><dd>The color of the stop.</dd>
* <dt>opacity</dt><dd>Number between 0 and 1 that indicates the opacity of the stop. The default value is 1.
* Note: No effect for IE 6 - 8</dd>
* <dt>offset</dt><dd>Number between 0 and 1 indicating where the color stop is positioned.</dd>
* </dl>
* </dd>
* <p>Linear gradients also have the following property:</p>
* <dt>rotation</dt><dd>Linear gradients flow left to right by default. The rotation property allows you to change the
* flow by rotation. (e.g. A rotation of 180 would make the gradient pain from right to left.)</dd>
* <p>Radial gradients have the following additional properties:</p>
* <dt>r</dt><dd>Radius of the gradient circle.</dd>
* <dt>fx</dt><dd>Focal point x-coordinate of the gradient.</dd>
* <dt>fy</dt><dd>Focal point y-coordinate of the gradient.</dd>
* </dl>
* <p>The corresponding `SVGShape` class implements the following additional properties.</p>
* <dl>
* <dt>cx</dt><dd>
* <p>The x-coordinate of the center of the gradient circle. Determines where the color stop begins. The default value 0.5.</p>
* <p><strong>Note: </strong>Currently, this property is not implemented for corresponding `CanvasShape` and
* `VMLShape` classes which are used on Android or IE 6 - 8.</p>
* </dd>
* <dt>cy</dt><dd>
* <p>The y-coordinate of the center of the gradient circle. Determines where the color stop begins. The default value 0.5.</p>
* <p><strong>Note: </strong>Currently, this property is not implemented for corresponding `CanvasShape` and `VMLShape`
* classes which are used on Android or IE 6 - 8.</p>
* </dd>
* </dl>
* <p>These properties are not currently implemented in `CanvasShape` or `VMLShape`.</p>
*
* @config fill
* @type Object
*/
fill: {
valueFn: "_getDefaultFill",
setter: function(val)
{
var fill,
tmpl = this.get("fill") || this._getDefaultFill();
fill = (val) ? Y.merge(tmpl, val) : null;
if(fill && fill.color)
{
if(fill.color === undefined || fill.color === "none")
{
fill.color = null;
}
}
this._setFillProps(fill);
return fill;
}
},
/**
* Contains information about the stroke of the shape.
* <dl>
* <dt>color</dt><dd>The color of the stroke.</dd>
* <dt>weight</dt><dd>Number that indicates the width of the stroke.</dd>
* <dt>opacity</dt><dd>Number between 0 and 1 that indicates the opacity of the stroke. The default value is 1.</dd>
* <dt>dashstyle</dt>Indicates whether to draw a dashed stroke. When set to "none", a solid stroke is drawn. When set
* to an array, the first index indicates the length of the dash. The second index indicates the length of gap.
* <dt>linecap</dt><dd>Specifies the linecap for the stroke. The following values can be specified:
* <dl>
* <dt>butt (default)</dt><dd>Specifies a butt linecap.</dd>
* <dt>square</dt><dd>Specifies a sqare linecap.</dd>
* <dt>round</dt><dd>Specifies a round linecap.</dd>
* </dl>
* </dd>
* <dt>linejoin</dt><dd>Specifies a linejoin for the stroke. The following values can be specified:
* <dl>
* <dt>round (default)</dt><dd>Specifies that the linejoin will be round.</dd>
* <dt>bevel</dt><dd>Specifies a bevel for the linejoin.</dd>
* <dt>miter limit</dt><dd>An integer specifying the miter limit of a miter linejoin. If you want to specify a linejoin
* of miter, you simply specify the limit as opposed to having separate miter and miter limit values.</dd>
* </dl>
* </dd>
* </dl>
*
* @config stroke
* @type Object
*/
stroke: {
valueFn: "_getDefaultStroke",
setter: function(val)
{
var tmpl = this.get("stroke") || this._getDefaultStroke(),
wt;
if(val && val.hasOwnProperty("weight"))
{
wt = parseInt(val.weight, 10);
if(!isNaN(wt))
{
val.weight = wt;
}
}
val = (val) ? Y.merge(tmpl, val) : null;
this._setStrokeProps(val);
return val;
}
},
//Not used. Remove in future.
autoSize: {
value: false
},
// Only implemented in SVG
// Determines whether the instance will receive mouse events.
//
// @config pointerEvents
// @type string
//
pointerEvents: {
value: "visiblePainted"
},
/**
* Represents an SVG Path string. This will be parsed and added to shape's API to represent the SVG data across all
* implementations. Note that when using VML or SVG implementations, part of this content will be added to the DOM using
* respective VML/SVG attributes. If your content comes from an untrusted source, you will need to ensure that no
* malicious code is included in that content.
*
* @config data
* @type String
*/
data: {
setter: function(val)
{
if(this.get("node"))
{
this._parsePathData(val);
}
return val;
}
},
/**
* Reference to the container Graphic.
*
* @config graphic
* @type Graphic
*/
graphic: {
readOnly: true,
getter: function()
{
return this._graphic;
}
}
};
Y.CanvasShape = CanvasShape;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Path.html">`Path`</a> class.
* `CanvasPath` is not intended to be used directly. Instead, use the <a href="Path.html">`Path`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Path.html">`Path`</a>
* class will point to the `CanvasPath` class.
*
* @module graphics
* @class CanvasPath
* @extends CanvasShape
*/
CanvasPath = function()
{
CanvasPath.superclass.constructor.apply(this, arguments);
};
CanvasPath.NAME = "path";
Y.extend(CanvasPath, Y.CanvasShape, {
/**
* Indicates the type of shape
*
* @property _type
* @type String
* @private
*/
_type: "path",
/**
* Draws the shape.
*
* @method _draw
* @private
*/
_draw: function()
{
this._closePath();
this._updateTransform();
},
/**
* Creates the dom node for the shape.
*
* @method createNode
* @return HTMLElement
* @private
*/
createNode: function()
{
var host = this,
node = Y.config.doc.createElement('canvas'),
name = host.name,
concat = host._camelCaseConcat,
id = host.get("id");
host._context = node.getContext('2d');
node.setAttribute("overflow", "visible");
node.setAttribute("pointer-events", "none");
node.style.pointerEvents = "none";
node.style.overflow = "visible";
node.setAttribute("id", id);
id = "#" + id;
host.node = node;
host.addClass(
_getClassName(SHAPE) +
" " +
_getClassName(concat(IMPLEMENTATION, SHAPE)) +
" " +
_getClassName(name) +
" " +
_getClassName(concat(IMPLEMENTATION, name))
);
},
/**
* Completes a drawing operation.
*
* @method end
*/
end: function()
{
this._draw();
return this;
}
});
CanvasPath.ATTRS = Y.merge(Y.CanvasShape.ATTRS, {
/**
* Indicates the width of the shape
*
* @config width
* @type Number
*/
width: {
getter: function()
{
var offset = this._stroke && this._strokeWeight ? (this._strokeWeight * 2) : 0;
return this._width - offset;
},
setter: function(val)
{
this._width = val;
return val;
}
},
/**
* Indicates the height of the shape
*
* @config height
* @type Number
*/
height: {
getter: function()
{
var offset = this._stroke && this._strokeWeight ? (this._strokeWeight * 2) : 0;
return this._height - offset;
},
setter: function(val)
{
this._height = val;
return val;
}
},
/**
* Indicates the path used for the node.
*
* @config path
* @type String
* @readOnly
*/
path: {
readOnly: true,
getter: function()
{
return this._path;
}
}
});
Y.CanvasPath = CanvasPath;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Rect.html">`Rect`</a> class.
* `CanvasRect` is not intended to be used directly. Instead, use the <a href="Rect.html">`Rect`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Rect.html">`Rect`</a>
* class will point to the `CanvasRect` class.
*
* @module graphics
* @class CanvasRect
* @constructor
*/
CanvasRect = function()
{
CanvasRect.superclass.constructor.apply(this, arguments);
};
CanvasRect.NAME = "rect";
Y.extend(CanvasRect, Y.CanvasShape, {
/**
* Indicates the type of shape
*
* @property _type
* @type String
* @private
*/
_type: "rect",
/**
* Draws the shape.
*
* @method _draw
* @private
*/
_draw: function()
{
var w = this.get("width"),
h = this.get("height");
this.clear();
this.drawRect(0, 0, w, h);
this._closePath();
}
});
CanvasRect.ATTRS = Y.CanvasShape.ATTRS;
Y.CanvasRect = CanvasRect;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Ellipse.html">`Ellipse`</a> class.
* `CanvasEllipse` is not intended to be used directly. Instead, use the <a href="Ellipse.html">`Ellipse`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Ellipse.html">`Ellipse`</a>
* class will point to the `CanvasEllipse` class.
*
* @module graphics
* @class CanvasEllipse
* @constructor
*/
CanvasEllipse = function()
{
CanvasEllipse.superclass.constructor.apply(this, arguments);
};
CanvasEllipse.NAME = "ellipse";
Y.extend(CanvasEllipse, CanvasShape, {
/**
* Indicates the type of shape
*
* @property _type
* @type String
* @private
*/
_type: "ellipse",
/**
* Draws the shape.
*
* @method _draw
* @private
*/
_draw: function()
{
var w = this.get("width"),
h = this.get("height");
this.clear();
this.drawEllipse(0, 0, w, h);
this._closePath();
}
});
CanvasEllipse.ATTRS = Y.merge(CanvasShape.ATTRS, {
/**
* Horizontal radius for the ellipse.
*
* @config xRadius
* @type Number
*/
xRadius: {
setter: function(val)
{
this.set("width", val * 2);
},
getter: function()
{
var val = this.get("width");
if(val)
{
val *= 0.5;
}
return val;
}
},
/**
* Vertical radius for the ellipse.
*
* @config yRadius
* @type Number
* @readOnly
*/
yRadius: {
setter: function(val)
{
this.set("height", val * 2);
},
getter: function()
{
var val = this.get("height");
if(val)
{
val *= 0.5;
}
return val;
}
}
});
Y.CanvasEllipse = CanvasEllipse;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Circle.html">`Circle`</a> class.
* `CanvasCircle` is not intended to be used directly. Instead, use the <a href="Circle.html">`Circle`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Circle.html">`Circle`</a>
* class will point to the `CanvasCircle` class.
*
* @module graphics
* @class CanvasCircle
* @constructor
*/
CanvasCircle = function()
{
CanvasCircle.superclass.constructor.apply(this, arguments);
};
CanvasCircle.NAME = "circle";
Y.extend(CanvasCircle, Y.CanvasShape, {
/**
* Indicates the type of shape
*
* @property _type
* @type String
* @private
*/
_type: "circle",
/**
* Draws the shape.
*
* @method _draw
* @private
*/
_draw: function()
{
var radius = this.get("radius");
if(radius)
{
this.clear();
this.drawCircle(0, 0, radius);
this._closePath();
}
}
});
CanvasCircle.ATTRS = Y.merge(Y.CanvasShape.ATTRS, {
/**
* Indicates the width of the shape
*
* @config width
* @type Number
*/
width: {
setter: function(val)
{
this.set("radius", val/2);
return val;
},
getter: function()
{
return this.get("radius") * 2;
}
},
/**
* Indicates the height of the shape
*
* @config height
* @type Number
*/
height: {
setter: function(val)
{
this.set("radius", val/2);
return val;
},
getter: function()
{
return this.get("radius") * 2;
}
},
/**
* Radius of the circle
*
* @config radius
* @type Number
*/
radius: {
lazyAdd: false
}
});
Y.CanvasCircle = CanvasCircle;
/**
* Draws pie slices
*
* @module graphics
* @class CanvasPieSlice
* @constructor
*/
CanvasPieSlice = function()
{
CanvasPieSlice.superclass.constructor.apply(this, arguments);
};
CanvasPieSlice.NAME = "canvasPieSlice";
Y.extend(CanvasPieSlice, Y.CanvasShape, {
/**
* Indicates the type of shape
*
* @property _type
* @type String
* @private
*/
_type: "path",
/**
* Change event listener
*
* @private
* @method _updateHandler
*/
_draw: function()
{
var x = this.get("cx"),
y = this.get("cy"),
startAngle = this.get("startAngle"),
arc = this.get("arc"),
radius = this.get("radius");
this.clear();
this._left = x;
this._right = radius;
this._top = y;
this._bottom = radius;
this.drawWedge(x, y, startAngle, arc, radius);
this.end();
}
});
CanvasPieSlice.ATTRS = Y.mix({
cx: {
value: 0
},
cy: {
value: 0
},
/**
* Starting angle in relation to a circle in which to begin the pie slice drawing.
*
* @config startAngle
* @type Number
*/
startAngle: {
value: 0
},
/**
* Arc of the slice.
*
* @config arc
* @type Number
*/
arc: {
value: 0
},
/**
* Radius of the circle in which the pie slice is drawn
*
* @config radius
* @type Number
*/
radius: {
value: 0
}
}, Y.CanvasShape.ATTRS);
Y.CanvasPieSlice = CanvasPieSlice;
/**
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the `Graphic` class.
* `CanvasGraphic` is not intended to be used directly. Instead, use the <a href="Graphic.html">`Graphic`</a> class.
* If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
* <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Graphic.html">`Graphic`</a>
* class will point to the `CanvasGraphic` class.
*
* @module graphics
* @class CanvasGraphic
* @constructor
*/
function CanvasGraphic() {
CanvasGraphic.superclass.constructor.apply(this, arguments);
}
CanvasGraphic.NAME = "canvasGraphic";
CanvasGraphic.ATTRS = {
/**
* Whether or not to render the `Graphic` automatically after to a specified parent node after init. This can be a Node
* instance or a CSS selector string.
*
* @config render
* @type Node | String
*/
render: {},
/**
* Unique id for class instance.
*
* @config id
* @type String
*/
id: {
valueFn: function()
{
return Y.guid();
},
setter: function(val)
{
var node = this._node;
if(node)
{
node.setAttribute("id", val);
}
return val;
}
},
/**
* Key value pairs in which a shape instance is associated with its id.
*
* @config shapes
* @type Object
* @readOnly
*/
shapes: {
readOnly: true,
getter: function()
{
return this._shapes;
}
},
/**
* Object containing size and coordinate data for the content of a Graphic in relation to the graphic instance's position.
*
* @config contentBounds
* @type Object
* @readOnly
*/
contentBounds: {
readOnly: true,
getter: function()
{
return this._contentBounds;
}
},
/**
* The outermost html element of the Graphic instance.
*
* @config node
* @type HTMLElement
* @readOnly
*/
node: {
readOnly: true,
getter: function()
{
return this._node;
}
},
/**
* Indicates the width of the `Graphic`.
*
* @config width
* @type Number
*/
width: {
setter: function(val)
{
if(this._node)
{
this._node.style.width = val + "px";
}
return val;
}
},
/**
* Indicates the height of the `Graphic`.
*
* @config height
* @type Number
*/
height: {
setter: function(val)
{
if(this._node)
{
this._node.style.height = val + "px";
}
return val;
}
},
/**
* Determines the sizing of the Graphic.
*
* <dl>
* <dt>sizeContentToGraphic</dt><dd>The Graphic's width and height attributes are, either explicitly set through the
* <code>width</code> and <code>height</code> attributes or are determined by the dimensions of the parent element. The
* content contained in the Graphic will be sized to fit with in the Graphic instance's dimensions. When using this
* setting, the <code>preserveAspectRatio</code> attribute will determine how the contents are sized.</dd>
* <dt>sizeGraphicToContent</dt><dd>(Also accepts a value of true) The Graphic's width and height are determined by the
* size and positioning of the content.</dd>
* <dt>false</dt><dd>The Graphic's width and height attributes are, either explicitly set through the <code>width</code>
* and <code>height</code> attributes or are determined by the dimensions of the parent element. The contents of the
* Graphic instance are not affected by this setting.</dd>
* </dl>
*
*
* @config autoSize
* @type Boolean | String
* @default false
*/
autoSize: {
value: false
},
/**
* Determines how content is sized when <code>autoSize</code> is set to <code>sizeContentToGraphic</code>.
*
* <dl>
* <dt>none<dt><dd>Do not force uniform scaling. Scale the graphic content of the given element non-uniformly if necessary
* such that the element's bounding box exactly matches the viewport rectangle.</dd>
* <dt>xMinYMin</dt><dd>Force uniform scaling position along the top left of the Graphic's node.</dd>
* <dt>xMidYMin</dt><dd>Force uniform scaling horizontally centered and positioned at the top of the Graphic's node.<dd>
* <dt>xMaxYMin</dt><dd>Force uniform scaling positioned horizontally from the right and vertically from the top.</dd>
* <dt>xMinYMid</dt>Force uniform scaling positioned horizontally from the left and vertically centered.</dd>
* <dt>xMidYMid (the default)</dt><dd>Force uniform scaling with the content centered.</dd>
* <dt>xMaxYMid</dt><dd>Force uniform scaling positioned horizontally from the right and vertically centered.</dd>
* <dt>xMinYMax</dt><dd>Force uniform scaling positioned horizontally from the left and vertically from the bottom.</dd>
* <dt>xMidYMax</dt><dd>Force uniform scaling horizontally centered and position vertically from the bottom.</dd>
* <dt>xMaxYMax</dt><dd>Force uniform scaling positioned horizontally from the right and vertically from the bottom.</dd>
* </dl>
*
* @config preserveAspectRatio
* @type String
* @default xMidYMid
*/
preserveAspectRatio: {
value: "xMidYMid"
},
/**
* The contentBounds will resize to greater values but not smaller values. (for performance)
* When resizing the contentBounds down is desirable, set the resizeDown value to true.
*
* @config resizeDown
* @type Boolean
*/
resizeDown: {
value: false
},
/**
* Indicates the x-coordinate for the instance.
*
* @config x
* @type Number
*/
x: {
getter: function()
{
return this._x;
},
setter: function(val)
{
this._x = val;
if(this._node)
{
this._node.style.left = val + "px";
}
return val;
}
},
/**
* Indicates the y-coordinate for the instance.
*
* @config y
* @type Number
*/
y: {
getter: function()
{
return this._y;
},
setter: function(val)
{
this._y = val;
if(this._node)
{
this._node.style.top = val + "px";
}
return val;
}
},
/**
* Indicates whether or not the instance will automatically redraw after a change is made to a shape.
* This property will get set to false when batching operations.
*
* @config autoDraw
* @type Boolean
* @default true
* @private
*/
autoDraw: {
value: true
},
/**
* Indicates whether the `Graphic` and its children are visible.
*
* @config visible
* @type Boolean
*/
visible: {
value: true,
setter: function(val)
{
this._toggleVisible(val);
return val;
}
}
};
Y.extend(CanvasGraphic, Y.GraphicBase, {
/**
* Sets the value of an attribute.
*
* @method set
* @param {String|Object} name The name of the attribute. Alternatively, an object of key value pairs can
* be passed in to set multiple attributes at once.
* @param {Any} value The value to set the attribute to. This value is ignored if an object is received as
* the name param.
*/
set: function()
{
var host = this,
attr = arguments[0],
redrawAttrs = {
autoDraw: true,
autoSize: true,
preserveAspectRatio: true,
resizeDown: true
},
key,
forceRedraw = false;
AttributeLite.prototype.set.apply(host, arguments);
if(host._state.autoDraw === true && Y.Object.size(this._shapes) > 0)
{
if(Y_LANG.isString && redrawAttrs[attr])
{
forceRedraw = true;
}
else if(Y_LANG.isObject(attr))
{
for(key in redrawAttrs)
{
if(redrawAttrs.hasOwnProperty(key) && attr[key])
{
forceRedraw = true;
break;
}
}
}
}
if(forceRedraw)
{
host._redraw();
}
},
/**
* Storage for `x` attribute.
*
* @property _x
* @type Number
* @private
*/
_x: 0,
/**
* Storage for `y` attribute.
*
* @property _y
* @type Number
* @private
*/
_y: 0,
/**
* Gets the current position of the graphic instance in page coordinates.
*
* @method getXY
* @return Array The XY position of the shape.
*/
getXY: function()
{
var node = this._node,
xy;
if(node)
{
xy = Y.DOM.getXY(node);
}
return xy;
},
/**
* Initializes the class.
*
* @method initializer
* @param {Object} config Optional attributes
* @private
*/
initializer: function() {
var render = this.get("render"),
visibility = this.get("visible") ? "visible" : "hidden",
w = this.get("width") || 0,
h = this.get("height") || 0;
this._shapes = {};
this._redrawQueue = {};
this._contentBounds = {
left: 0,
top: 0,
right: 0,
bottom: 0
};
this._node = DOCUMENT.createElement('div');
this._node.style.position = "absolute";
this._node.style.visibility = visibility;
this.set("width", w);
this.set("height", h);
if(render)
{
this.render(render);
}
},
/**
* Adds the graphics node to the dom.
*
* @method render
* @param {HTMLElement} parentNode node in which to render the graphics node into.
*/
render: function(render) {
var parentNode = render || DOCUMENT.body,
node = this._node,
w,
h;
if(render instanceof Y.Node)
{
parentNode = render._node;
}
else if(Y.Lang.isString(render))
{
parentNode = Y.Selector.query(render, DOCUMENT.body, true);
}
w = this.get("width") || parseInt(Y.DOM.getComputedStyle(parentNode, "width"), 10);
h = this.get("height") || parseInt(Y.DOM.getComputedStyle(parentNode, "height"), 10);
parentNode.appendChild(node);
node.style.display = "block";
node.style.position = "absolute";
node.style.left = this.get("x") + "px";
node.style.top = this.get("y") + "px";
this.set("width", w);
this.set("height", h);
this.parentNode = parentNode;
return this;
},
/**
* Removes all nodes.
*
* @method destroy
*/
destroy: function()
{
this.removeAllShapes();
if(this._node)
{
this._removeChildren(this._node);
if(this._node.parentNode)
{
this._node.parentNode.removeChild(this._node);
}
this._node = null;
}
},
/**
* Generates a shape instance by type.
*
* @method addShape
* @param {Object} cfg attributes for the shape
* @return Shape
*/
addShape: function(cfg)
{
cfg.graphic = this;
if(!this.get("visible"))
{
cfg.visible = false;
}
var ShapeClass = this._getShapeClass(cfg.type),
shape = new ShapeClass(cfg);
this._appendShape(shape);
return shape;
},
/**
* Adds a shape instance to the graphic instance.
*
* @method _appendShape
* @param {Shape} shape The shape instance to be added to the graphic.
* @private
*/
_appendShape: function(shape)
{
var node = shape.node,
parentNode = this._frag || this._node;
if(this.get("autoDraw"))
{
parentNode.appendChild(node);
}
else
{
this._getDocFrag().appendChild(node);
}
},
/**
* Removes a shape instance from from the graphic instance.
*
* @method removeShape
* @param {Shape|String} shape The instance or id of the shape to be removed.
*/
removeShape: function(shape)
{
if(!(shape instanceof CanvasShape))
{
if(Y_LANG.isString(shape))
{
shape = this._shapes[shape];
}
}
if(shape && shape instanceof CanvasShape)
{
shape._destroy();
delete this._shapes[shape.get("id")];
}
if(this.get("autoDraw"))
{
this._redraw();
}
return shape;
},
/**
* Removes all shape instances from the dom.
*
* @method removeAllShapes
*/
removeAllShapes: function()
{
var shapes = this._shapes,
i;
for(i in shapes)
{
if(shapes.hasOwnProperty(i))
{
shapes[i].destroy();
}
}
this._shapes = {};
},
/**
* Clears the graphics object.
*
* @method clear
*/
clear: function() {
this.removeAllShapes();
},
/**
* Removes all child nodes.
*
* @method _removeChildren
* @param {HTMLElement} node
* @private
*/
_removeChildren: function(node)
{
if(node && node.hasChildNodes())
{
var child;
while(node.firstChild)
{
child = node.firstChild;
this._removeChildren(child);
node.removeChild(child);
}
}
},
/**
* Toggles visibility
*
* @method _toggleVisible
* @param {Boolean} val indicates visibilitye
* @private
*/
_toggleVisible: function(val)
{
var i,
shapes = this._shapes,
visibility = val ? "visible" : "hidden";
if(shapes)
{
for(i in shapes)
{
if(shapes.hasOwnProperty(i))
{
shapes[i].set("visible", val);
}
}
}
if(this._node)
{
this._node.style.visibility = visibility;
}
},
/**
* Returns a shape class. Used by `addShape`.
*
* @method _getShapeClass
* @param {Shape | String} val Indicates which shape class.
* @return Function
* @private
*/
_getShapeClass: function(val)
{
var shape = this._shapeClass[val];
if(shape)
{
return shape;
}
return val;
},
/**
* Look up for shape classes. Used by `addShape` to retrieve a class for instantiation.
*
* @property _shapeClass
* @type Object
* @private
*/
_shapeClass: {
circle: Y.CanvasCircle,
rect: Y.CanvasRect,
path: Y.CanvasPath,
ellipse: Y.CanvasEllipse,
pieslice: Y.CanvasPieSlice
},
/**
* Returns a shape based on the id of its dom node.
*
* @method getShapeById
* @param {String} id Dom id of the shape's node attribute.
* @return Shape
*/
getShapeById: function(id)
{
var shape = this._shapes[id];
return shape;
},
/**
* Allows for creating multiple shapes in order to batch appending and redraw operations.
*
* @method batch
* @param {Function} method Method to execute.
*/
batch: function(method)
{
var autoDraw = this.get("autoDraw");
this.set("autoDraw", false);
method();
this.set("autoDraw", autoDraw);
},
/**
* Returns a document fragment to for attaching shapes.
*
* @method _getDocFrag
* @return DocumentFragment
* @private
*/
_getDocFrag: function()
{
if(!this._frag)
{
this._frag = DOCUMENT.createDocumentFragment();
}
return this._frag;
},
/**
* Redraws all shapes.
*
* @method _redraw
* @private
*/
_redraw: function()
{
var autoSize = this.get("autoSize"),
preserveAspectRatio = this.get("preserveAspectRatio"),
box = this.get("resizeDown") ? this._getUpdatedContentBounds() : this._contentBounds,
contentWidth,
contentHeight,
w,
h,
xScale,
yScale,
translateX = 0,
translateY = 0,
matrix,
node = this.get("node");
if(autoSize)
{
if(autoSize === "sizeContentToGraphic")
{
contentWidth = box.right - box.left;
contentHeight = box.bottom - box.top;
w = parseFloat(Y_DOM.getComputedStyle(node, "width"));
h = parseFloat(Y_DOM.getComputedStyle(node, "height"));
matrix = new Y.Matrix();
if(preserveAspectRatio === "none")
{
xScale = w/contentWidth;
yScale = h/contentHeight;
}
else
{
if(contentWidth/contentHeight !== w/h)
{
if(contentWidth * h/contentHeight > w)
{
xScale = yScale = w/contentWidth;
translateY = this._calculateTranslate(preserveAspectRatio.slice(5).toLowerCase(), contentHeight * w/contentWidth, h);
}
else
{
xScale = yScale = h/contentHeight;
translateX = this._calculateTranslate(preserveAspectRatio.slice(1, 4).toLowerCase(), contentWidth * h/contentHeight, w);
}
}
}
Y_DOM.setStyle(node, "transformOrigin", "0% 0%");
translateX = translateX - (box.left * xScale);
translateY = translateY - (box.top * yScale);
matrix.translate(translateX, translateY);
matrix.scale(xScale, yScale);
Y_DOM.setStyle(node, "transform", matrix.toCSSText());
}
else
{
this.set("width", box.right);
this.set("height", box.bottom);
}
}
if(this._frag)
{
this._node.appendChild(this._frag);
this._frag = null;
}
},
/**
* Determines the value for either an x or y value to be used for the <code>translate</code> of the Graphic.
*
* @method _calculateTranslate
* @param {String} position The position for placement. Possible values are min, mid and max.
* @param {Number} contentSize The total size of the content.
* @param {Number} boundsSize The total size of the Graphic.
* @return Number
* @private
*/
_calculateTranslate: function(position, contentSize, boundsSize)
{
var ratio = boundsSize - contentSize,
coord;
switch(position)
{
case "mid" :
coord = ratio * 0.5;
break;
case "max" :
coord = ratio;
break;
default :
coord = 0;
break;
}
return coord;
},
/**
* Adds a shape to the redraw queue and calculates the contentBounds. Used internally
* by `Shape` instances.
*
* @method addToRedrawQueue
* @param Shape shape The shape instance to add to the queue
* @protected
*/
addToRedrawQueue: function(shape)
{
var shapeBox,
box;
this._shapes[shape.get("id")] = shape;
if(!this.get("resizeDown"))
{
shapeBox = shape.getBounds();
box = this._contentBounds;
box.left = box.left < shapeBox.left ? box.left : shapeBox.left;
box.top = box.top < shapeBox.top ? box.top : shapeBox.top;
box.right = box.right > shapeBox.right ? box.right : shapeBox.right;
box.bottom = box.bottom > shapeBox.bottom ? box.bottom : shapeBox.bottom;
this._contentBounds = box;
}
if(this.get("autoDraw"))
{
this._redraw();
}
},
/**
* Recalculates and returns the `contentBounds` for the `Graphic` instance.
*
* @method _getUpdatedContentBounds
* @return {Object}
* @private
*/
_getUpdatedContentBounds: function()
{
var bounds,
i,
shape,
queue = this._shapes,
box = {};
for(i in queue)
{
if(queue.hasOwnProperty(i))
{
shape = queue[i];
bounds = shape.getBounds();
box.left = Y_LANG.isNumber(box.left) ? Math.min(box.left, bounds.left) : bounds.left;
box.top = Y_LANG.isNumber(box.top) ? Math.min(box.top, bounds.top) : bounds.top;
box.right = Y_LANG.isNumber(box.right) ? Math.max(box.right, bounds.right) : bounds.right;
box.bottom = Y_LANG.isNumber(box.bottom) ? Math.max(box.bottom, bounds.bottom) : bounds.bottom;
}
}
box.left = Y_LANG.isNumber(box.left) ? box.left : 0;
box.top = Y_LANG.isNumber(box.top) ? box.top : 0;
box.right = Y_LANG.isNumber(box.right) ? box.right : 0;
box.bottom = Y_LANG.isNumber(box.bottom) ? box.bottom : 0;
this._contentBounds = box;
return box;
},
/**
* Inserts shape on the top of the tree.
*
* @method _toFront
* @param {CanvasShape} Shape to add.
* @private
*/
_toFront: function(shape)
{
var contentNode = this.get("node");
if(shape instanceof Y.CanvasShape)
{
shape = shape.get("node");
}
if(contentNode && shape)
{
contentNode.appendChild(shape);
}
},
/**
* Inserts shape as the first child of the content node.
*
* @method _toBack
* @param {CanvasShape} Shape to add.
* @private
*/
_toBack: function(shape)
{
var contentNode = this.get("node"),
targetNode;
if(shape instanceof Y.CanvasShape)
{
shape = shape.get("node");
}
if(contentNode && shape)
{
targetNode = contentNode.firstChild;
if(targetNode)
{
contentNode.insertBefore(shape, targetNode);
}
else
{
contentNode.appendChild(shape);
}
}
}
});
Y.CanvasGraphic = CanvasGraphic;
}, '3.17.2', {"requires": ["graphics", "color-base"]});