graphics-vml.js revision a00d11bb8925157bd9fcc0e0fb5fc697c53726ea
/**
* VMLGraphics is a fallback drawing api used for basic drawing operations when SVG is not available.
*
* @class VMLGraphics
* @constructor
*/
var VMLGraphics = function(config) {
this.initializer.apply(this, arguments);
};
/**
* @private
*/
VMLGraphics.prototype = {
initializer: function(config) {
config = config || {};
var w = config.width || 0,
h = config.height || 0;
this.node = this._createGraphics();
this.setSize(w, h);
this._initProps();
},
/**
* @private
*/
beginBitmapFill: function(config) {
var fill = {};
fill.src = config.bitmap.src;
fill.type = "tile";
this._fillProps = fill;
if(!isNaN(config.tx) ||
!isNaN(config.ty) ||
!isNaN(config.width) ||
!isNaN(config.height))
{
this._gradientBox = {
tx:config.tx,
ty:config.ty,
width:config.width,
height:config.height
};
}
else
{
this._gradientBox = null;
}
},
/**
* @private
*/
beginFill: function(color, alpha) {
if (color) {
if (Y.Lang.isNumber(alpha)) {
this._fillProps = {
type:"solid",
opacity: alpha
};
}
this._fillColor = color;
this._fill = 1;
}
return this;
},
/**
* @private
*/
beginGradientFill: function(config) {
var type = config.type,
colors = config.colors,
alphas = config.alphas || [],
ratios = config.ratios || [],
fill = {
colors:colors,
ratios:ratios
},
len = alphas.length,
i = 0,
alpha,
oi,
rotation = config.rotation || 0;
for(;i < len; ++i)
{
alpha = alphas[i];
alpha = Y.Lang.isNumber(alpha) ? alpha : 1;
oi = i > 0 ? i + 1 : "";
alphas[i] = Math.round(alpha * 100) + "%";
fill["opacity" + oi] = alpha;
}
if(type === "linear")
{
if(config)
{
}
if(rotation > 0 && rotation <= 90)
{
rotation = 450 - rotation;
}
else if(rotation <= 270)
{
rotation = 270 - rotation;
}
else if(rotation <= 360)
{
rotation = 630 - rotation;
}
else
{
rotation = 270;
}
fill.type = "gradientunscaled";
fill.angle = rotation;
}
else if(type === "radial")
{
fill.alignshape = false;
fill.type = "gradientradial";
fill.focus = "100%";
fill.focusposition = "50%,50%";
}
fill.ratios = ratios || [];
if(!isNaN(config.tx) ||
!isNaN(config.ty) ||
!isNaN(config.width) ||
!isNaN(config.height))
{
this._gradientBox = {
tx:config.tx,
ty:config.ty,
width:config.width,
height:config.height
};
}
else
{
this._gradientBox = null;
}
this._fillProps = fill;
},
/**
* @private
*/
clear: function() {
this._path = '';
this._removeChildren(this.node);
},
/**
* @private
*/
destroy: function()
{
this._removeChildren(this.node);
this.node.parentNode.removeChild(this.node);
},
/**
* @private
*/
_removeChildren: function(node)
{
if(node.hasChildNodes())
{
var child;
while(node.firstChild)
{
child = node.firstChild;
this._removeChildren(child);
node.removeChild(child);
}
}
},
/**
* @private
*/
toggleVisible: function(val)
{
this._toggleVisible(this.node, val);
},
/**
* @private
*/
_toggleVisible: function(node, val)
{
var children = Y.one(node).get("children"),
visibility = val ? "visible" : "hidden",
i = 0,
len;
if(children)
{
len = children.length;
for(; i < len; ++i)
{
this._toggleVisible(children[i], val);
}
}
node.style.visibility = visibility;
},
/**
* @private
*/
curveTo: function(cp1x, cp1y, cp2x, cp2y, x, y) {
this._shape = "shape";
this._path += ' c ' + Math.round(cp1x) + ", " + Math.round(cp1y) + ", " + Math.round(cp2x) + ", " + Math.round(cp2y) + ", " + x + ", " + y;
this._trackSize(x, y);
},
/**
* @private
*/
quadraticCurveTo: function(cpx, cpy, x, y) {
this._path += ' qb ' + cpx + ", " + cpy + ", " + x + ", " + y;
},
/**
* @private
*/
drawCircle: function(x, y, r) {
this._width = this._height = r * 2;
this._x = x - r;
this._y = y - r;
this._shape = "oval";
this._draw();
},
/**
* @private
*/
drawEllipse: function(x, y, w, h) {
this._width = w;
this._height = h;
this._x = x;
this._y = y;
this._shape = "oval";
this._draw();
},
/**
* @private
*/
drawRect: function(x, y, w, h) {
this._x = x;
this._y = y;
this._width = w;
this._height = h;
this.moveTo(x, y);
this.lineTo(x + w, y);
this.lineTo(x + w, y + h);
this.lineTo(x, y + h);
this.lineTo(x, y);
this._draw();
},
/**
* @private
*/
drawRoundRect: function(x, y, w, h, ew, eh) {
this._x = x;
this._y = y;
this._width = w;
this._height = h;
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);
this._draw();
},
/**
* @private
*/
drawWedge: function(x, y, startAngle, arc, radius, yRadius)
{
this._drawingComplete = false;
this._width = radius;
this._height = radius;
yRadius = yRadius || radius;
this._path += this._getWedgePath({x:x, y:y, startAngle:startAngle, arc:arc, radius:radius, yRadius:yRadius});
this._width = radius * 2;
this._height = this._width;
this._shape = "shape";
this._draw();
},
/**
* @private
*/
_getWedgePath: function(config)
{
var x = config.x,
y = config.y,
startAngle = config.startAngle,
arc = config.arc,
radius = config.radius,
yRadius = config.yRadius || radius,
path;
if(Math.abs(arc) > 360)
{
arc = 360;
}
startAngle *= -65535;
arc *= 65536;
path = " m " + x + " " + y + " ae " + x + " " + y + " " + radius + " " + yRadius + " " + startAngle + " " + arc;
return path;
},
/**
* @private
*/
end: function() {
if(this._shape)
{
this._draw();
}
this._initProps();
},
/**
* @private
*/
lineGradientStyle: function() {
Y.log('lineGradientStyle not implemented', 'warn', 'graphics-canvas');
},
/**
* @private
*/
lineStyle: function(thickness, color, alpha, pixelHinting, scaleMode, caps, joints, miterLimit) {
this._stroke = 1;
this._strokeWeight = thickness * 0.7;
this._strokeColor = color;
this._strokeOpacity = Y.Lang.isNumber(alpha) ? alpha : 1;
},
/**
* @private
*/
lineTo: function(point1, point2, etc) {
var args = arguments,
i,
len;
if (typeof point1 === 'string' || typeof point1 === 'number') {
args = [[point1, point2]];
}
len = args.length;
this._shape = "shape";
this._path += ' l ';
for (i = 0; i < len; ++i) {
this._path += ' ' + Math.round(args[i][0]) + ', ' + Math.round(args[i][1]);
this._trackSize.apply(this, args[i]);
}
},
/**
* @private
*/
moveTo: function(x, y) {
this._path += ' m ' + Math.round(x) + ', ' + Math.round(y);
},
/**
* @private
*/
setSize: function(w, h) {
w = Math.round(w);
h = Math.round(h);
this.node.style.width = w + 'px';
this.node.style.height = h + 'px';
this.node.coordSize = w + ' ' + h;
this._canvasWidth = w;
this._canvasHeight = h;
},
/**
* @private
*/
setPosition: function(x, y)
{
x = Math.round(x);
y = Math.round(y);
this.node.style.left = x + "px";
this.node.style.top = y + "px";
},
/**
* @private
*/
render: function(parentNode) {
var w = Math.max(parentNode.offsetWidth || 0, this._canvasWidth),
h = Math.max(parentNode.offsetHeight || 0, this._canvasHeight);
parentNode = parentNode || Y.config.doc.body;
parentNode.appendChild(this.node);
this.setSize(w, h);
this._initProps();
return this;
},
/**
* @private
*/
_shape: null,
/**
* @private
*/
_trackSize: function(w, h) {
if (w > this._width) {
this._width = w;
}
if (h > this._height) {
this._height = h;
}
},
/**
* @private
*/
_initProps: function() {
this._fillColor = null;
this._strokeColor = null;
this._strokeOpacity = null;
this._strokeWeight = 0;
this._fillProps = null;
this._path = '';
this._width = 0;
this._height = 0;
this._x = 0;
this._y = 0;
this._fill = null;
this._stroke = 0;
this._stroked = false;
},
/**
* @private
*/
_clearPath: function()
{
this._shape = null;
this._path = '';
this._width = 0;
this._height = 0;
this._x = 0;
this._y = 0;
},
/**
* @private
*/
_draw: function()
{
var shape = this._createGraphicNode(this._shape),
w = Math.round(this._width),
h = Math.round(this._height),
strokeNode,
fillProps = this._fillProps;
this.setSize(w, h);
if(this._path)
{
if(this._fill || this._fillProps)
{
this._path += ' x';
}
if(this._stroke)
{
this._path += ' e';
}
shape.path = this._path;
shape.coordSize = w + ', ' + h;
}
else
{
shape.style.display = "block";
shape.style.position = "absolute";
shape.style.left = this._x + "px";
shape.style.top = this._y + "px";
}
if (this._fill) {
shape.fillColor = this._fillColor;
}
else
{
shape.filled = false;
}
if (this._stroke && this._strokeWeight > 0) {
shape.strokeColor = this._strokeColor;
shape.strokeWeight = this._strokeWeight;
if(Y.Lang.isNumber(this._strokeOpacity) && this._strokeOpacity < 1)
{
strokeNode = this._createGraphicNode("stroke");
shape.appendChild(strokeNode);
strokeNode.opacity = this._strokeOpacity;
}
} else {
shape.stroked = false;
}
shape.style.width = w + 'px';
shape.style.height = h + 'px';
if (fillProps) {
shape.filled = true;
shape.appendChild(this._getFill());
}
this.node.appendChild(shape);
this._clearPath();
},
/**
* @private
*/
_getFill: function() {
var fill = this._createGraphicNode("fill"),
w = this._width,
h = this._height,
fillProps = this._fillProps,
prop,
pct,
i = 0,
colors,
colorstring = "",
len,
ratios,
hyp = Math.sqrt(Math.pow(w, 2) + Math.pow(h, 2)),
cx = 50,
cy = 50;
if(this._gradientBox)
{
cx= Math.round( (this._gradientBox.width/2 - ((this._x - this._gradientBox.tx) * hyp/w))/(w * w/hyp) * 100);
cy = Math.round( (this._gradientBox.height/2 - ((this._y - this._gradientBox.ty) * hyp/h))/(h * h/hyp) * 100);
fillProps.focussize = (this._gradientBox.width/w)/10 + " " + (this._gradientBox.height/h)/10;
}
if(fillProps.colors)
{
colors = fillProps.colors.concat();
ratios = fillProps.ratios.concat();
len = colors.length;
for(;i < len; ++i) {
pct = ratios[i] || i/(len-1);
pct = Math.round(100 * pct) + "%";
colorstring += ", " + pct + " " + colors[i];
}
if(parseInt(pct, 10) < 100)
{
colorstring += ", 100% " + colors[len-1];
}
}
for (prop in fillProps) {
if(fillProps.hasOwnProperty(prop)) {
fill.setAttribute(prop, fillProps[prop]);
}
}
fill.colors = colorstring.substr(2);
if(fillProps.type === "gradientradial")
{
fill.focusposition = cx + "%," + cy + "%";
}
return fill;
},
/**
* @private
*/
_createGraphics: function() {
var group = this._createGraphicNode("group");
group.style.display = "inline-block";
group.style.position = 'absolute';
return group;
},
/**
* @private
*/
_createGraphicNode: function(type)
{
return document.createElement('<' + type + ' xmlns="urn:schemas-microsft.com:vml" class="vml' + type + '"/>');
},
/**
* @private
*/
_getNodeShapeType: function(type)
{
var shape = "shape";
if(this._typeConversionHash.hasOwnProperty(type))
{
shape = this._typeConversionHash[type];
}
return shape;
},
/**
* @private
*/
_typeConversionHash: {
circle: "oval",
ellipse: "oval",
rect: "rect"
},
/**
* @private
*/
getShape: function(config) {
config.graphic = this;
return new Y.Shape(config);
},
/**
* @private
*/
addChild: function(child)
{
this.node.appendChild(child);
}
};
if(!document.createElementNS)
{
var sheet = document.createStyleSheet();
sheet.addRule(".vmlgroup", "behavior:url(#default#VML)", sheet.rules.length);
sheet.addRule(".vmlgroup", "display:inline-block", sheet.rules.length);
sheet.addRule(".vmlgroup", "zoom:1", sheet.rules.length);
sheet.addRule(".vmlshape", "behavior:url(#default#VML)", sheet.rules.length);
sheet.addRule(".vmlshape", "display:inline-block", sheet.rules.length);
sheet.addRule(".vmloval", "behavior:url(#default#VML)", sheet.rules.length);
sheet.addRule(".vmloval", "display:inline-block", sheet.rules.length);
sheet.addRule(".vmlrect", "behavior:url(#default#VML)", sheet.rules.length);
sheet.addRule(".vmlrect", "display:block", sheet.rules.length);
sheet.addRule(".vmlfill", "behavior:url(#default#VML)", sheet.rules.length);
sheet.addRule(".vmlstroke", "behavior:url(#default#VML)", sheet.rules.length);
Y.log('using VML');
Y.Graphic = VMLGraphics;
}