684 lines
20 KiB
JavaScript
684 lines
20 KiB
JavaScript
|
dojo.provide("dojox.gfx.canvas");
|
||
|
|
|
||
|
|
dojo.require("dojox.gfx._base");
|
||
|
|
dojo.require("dojox.gfx.shape");
|
||
|
|
dojo.require("dojox.gfx.path");
|
||
|
|
dojo.require("dojox.gfx.arc");
|
||
|
|
dojo.require("dojox.gfx.decompose");
|
||
|
|
|
||
|
|
dojo.experimental("dojox.gfx.canvas");
|
||
|
|
|
||
|
|
(function(){
|
||
|
|
var g = dojox.gfx, gs = g.shape, ga = g.arc,
|
||
|
|
m = g.matrix, mp = m.multiplyPoint, pi = Math.PI, twoPI = 2 * pi, halfPI = pi /2;
|
||
|
|
|
||
|
|
dojo.extend(g.Shape, {
|
||
|
|
_render: function(/* Object */ ctx){
|
||
|
|
// summary: render the shape
|
||
|
|
ctx.save();
|
||
|
|
this._renderTransform(ctx);
|
||
|
|
this._renderShape(ctx);
|
||
|
|
this._renderFill(ctx, true);
|
||
|
|
this._renderStroke(ctx, true);
|
||
|
|
ctx.restore();
|
||
|
|
},
|
||
|
|
_renderTransform: function(/* Object */ ctx){
|
||
|
|
if("canvasTransform" in this){
|
||
|
|
var t = this.canvasTransform;
|
||
|
|
ctx.translate(t.dx, t.dy);
|
||
|
|
ctx.rotate(t.angle2);
|
||
|
|
ctx.scale(t.sx, t.sy);
|
||
|
|
ctx.rotate(t.angle1);
|
||
|
|
// The future implementation when vendors catch up with the spec:
|
||
|
|
// var t = this.matrix;
|
||
|
|
// ctx.transform(t.xx, t.yx, t.xy, t.yy, t.dx, t.dy);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
// nothing
|
||
|
|
},
|
||
|
|
_renderFill: function(/* Object */ ctx, /* Boolean */ apply){
|
||
|
|
if("canvasFill" in this){
|
||
|
|
if("canvasFillImage" in this){
|
||
|
|
this.canvasFill = ctx.createPattern(this.canvasFillImage, "repeat");
|
||
|
|
delete this.canvasFillImage;
|
||
|
|
}
|
||
|
|
ctx.fillStyle = this.canvasFill;
|
||
|
|
if(apply){ ctx.fill(); }
|
||
|
|
}else{
|
||
|
|
ctx.fillStyle = "rgba(0,0,0,0.0)";
|
||
|
|
}
|
||
|
|
},
|
||
|
|
_renderStroke: function(/* Object */ ctx, /* Boolean */ apply){
|
||
|
|
var s = this.strokeStyle;
|
||
|
|
if(s){
|
||
|
|
ctx.strokeStyle = s.color.toString();
|
||
|
|
ctx.lineWidth = s.width;
|
||
|
|
ctx.lineCap = s.cap;
|
||
|
|
if(typeof s.join == "number"){
|
||
|
|
ctx.lineJoin = "miter";
|
||
|
|
ctx.miterLimit = s.join;
|
||
|
|
}else{
|
||
|
|
ctx.lineJoin = s.join;
|
||
|
|
}
|
||
|
|
if(apply){ ctx.stroke(); }
|
||
|
|
}else if(!apply){
|
||
|
|
ctx.strokeStyle = "rgba(0,0,0,0.0)";
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
// events are not implemented
|
||
|
|
getEventSource: function(){ return null; },
|
||
|
|
connect: function(){},
|
||
|
|
disconnect: function(){}
|
||
|
|
});
|
||
|
|
|
||
|
|
var modifyMethod = function(shape, method, extra){
|
||
|
|
var old = shape.prototype[method];
|
||
|
|
shape.prototype[method] = extra ?
|
||
|
|
function(){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
old.apply(this, arguments);
|
||
|
|
extra.call(this);
|
||
|
|
return this;
|
||
|
|
} :
|
||
|
|
function(){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
return old.apply(this, arguments);
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
modifyMethod(g.Shape, "setTransform",
|
||
|
|
function(){
|
||
|
|
// prepare Canvas-specific structures
|
||
|
|
if(this.matrix){
|
||
|
|
this.canvasTransform = g.decompose(this.matrix);
|
||
|
|
}else{
|
||
|
|
delete this.canvasTransform;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
modifyMethod(g.Shape, "setFill",
|
||
|
|
function(){
|
||
|
|
// prepare Canvas-specific structures
|
||
|
|
var fs = this.fillStyle, f;
|
||
|
|
if(fs){
|
||
|
|
if(typeof(fs) == "object" && "type" in fs){
|
||
|
|
var ctx = this.surface.rawNode.getContext("2d");
|
||
|
|
switch(fs.type){
|
||
|
|
case "linear":
|
||
|
|
case "radial":
|
||
|
|
f = fs.type == "linear" ?
|
||
|
|
ctx.createLinearGradient(fs.x1, fs.y1, fs.x2, fs.y2) :
|
||
|
|
ctx.createRadialGradient(fs.cx, fs.cy, 0, fs.cx, fs.cy, fs.r);
|
||
|
|
dojo.forEach(fs.colors, function(step){
|
||
|
|
f.addColorStop(step.offset, g.normalizeColor(step.color).toString());
|
||
|
|
});
|
||
|
|
break;
|
||
|
|
case "pattern":
|
||
|
|
var img = new Image(fs.width, fs.height);
|
||
|
|
this.surface.downloadImage(img, fs.src);
|
||
|
|
this.canvasFillImage = img;
|
||
|
|
}
|
||
|
|
}else{
|
||
|
|
// Set fill color using CSS RGBA func style
|
||
|
|
f = fs.toString();
|
||
|
|
}
|
||
|
|
this.canvasFill = f;
|
||
|
|
}else{
|
||
|
|
delete this.canvasFill;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
modifyMethod(g.Shape, "setStroke");
|
||
|
|
modifyMethod(g.Shape, "setShape");
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Group", g.Shape, {
|
||
|
|
// summary: a group shape (Canvas), which can be used
|
||
|
|
// to logically group shapes (e.g, to propagate matricies)
|
||
|
|
constructor: function(){
|
||
|
|
gs.Container._init.call(this);
|
||
|
|
},
|
||
|
|
_render: function(/* Object */ ctx){
|
||
|
|
// summary: render the group
|
||
|
|
ctx.save();
|
||
|
|
this._renderTransform(ctx);
|
||
|
|
this._renderFill(ctx);
|
||
|
|
this._renderStroke(ctx);
|
||
|
|
for(var i = 0; i < this.children.length; ++i){
|
||
|
|
this.children[i]._render(ctx);
|
||
|
|
}
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Rect", gs.Rect, {
|
||
|
|
// summary: a rectangle shape (Canvas)
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var s = this.shape, r = Math.min(s.r, s.height / 2, s.width / 2),
|
||
|
|
xl = s.x, xr = xl + s.width, yt = s.y, yb = yt + s.height,
|
||
|
|
xl2 = xl + r, xr2 = xr - r, yt2 = yt + r, yb2 = yb - r;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(xl2, yt);
|
||
|
|
if(r){
|
||
|
|
ctx.arc(xr2, yt2, r, -halfPI, 0, false);
|
||
|
|
ctx.arc(xr2, yb2, r, 0, halfPI, false);
|
||
|
|
ctx.arc(xl2, yb2, r, halfPI, pi, false);
|
||
|
|
ctx.arc(xl2, yt2, r, pi, halfPI, false);
|
||
|
|
}else{
|
||
|
|
ctx.lineTo(xr2, yt);
|
||
|
|
ctx.lineTo(xr, yb2);
|
||
|
|
ctx.lineTo(xl2, yb);
|
||
|
|
ctx.lineTo(xl, yt2);
|
||
|
|
}
|
||
|
|
ctx.closePath();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var bezierCircle = [];
|
||
|
|
(function(){
|
||
|
|
var u = ga.curvePI4;
|
||
|
|
bezierCircle.push(u.s, u.c1, u.c2, u.e);
|
||
|
|
for(var a = 45; a < 360; a += 45){
|
||
|
|
var r = m.rotateg(a);
|
||
|
|
bezierCircle.push(mp(r, u.c1), mp(r, u.c2), mp(r, u.e));
|
||
|
|
}
|
||
|
|
})();
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Ellipse", gs.Ellipse, {
|
||
|
|
// summary: an ellipse shape (Canvas)
|
||
|
|
setShape: function(){
|
||
|
|
g.Ellipse.superclass.setShape.apply(this, arguments);
|
||
|
|
// prepare Canvas-specific structures
|
||
|
|
var s = this.shape, t, c1, c2, r = [],
|
||
|
|
M = m.normalize([m.translate(s.cx, s.cy), m.scale(s.rx, s.ry)]);
|
||
|
|
t = mp(M, bezierCircle[0]);
|
||
|
|
r.push([t.x, t.y]);
|
||
|
|
for(var i = 1; i < bezierCircle.length; i += 3){
|
||
|
|
c1 = mp(M, bezierCircle[i]);
|
||
|
|
c2 = mp(M, bezierCircle[i + 1]);
|
||
|
|
t = mp(M, bezierCircle[i + 2]);
|
||
|
|
r.push([c1.x, c1.y, c2.x, c2.y, t.x, t.y]);
|
||
|
|
}
|
||
|
|
this.canvasEllipse = r;
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var r = this.canvasEllipse;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo.apply(ctx, r[0]);
|
||
|
|
for(var i = 1; i < r.length; ++i){
|
||
|
|
ctx.bezierCurveTo.apply(ctx, r[i]);
|
||
|
|
}
|
||
|
|
ctx.closePath();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Circle", gs.Circle, {
|
||
|
|
// summary: a circle shape (Canvas)
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var s = this.shape;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.arc(s.cx, s.cy, s.r, 0, twoPI, 1);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Line", gs.Line, {
|
||
|
|
// summary: a line shape (Canvas)
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var s = this.shape;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(s.x1, s.y1);
|
||
|
|
ctx.lineTo(s.x2, s.y2);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Polyline", gs.Polyline, {
|
||
|
|
// summary: a polyline/polygon shape (Canvas)
|
||
|
|
setShape: function(){
|
||
|
|
g.Polyline.superclass.setShape.apply(this, arguments);
|
||
|
|
// dojo.inherited("setShape", arguments);
|
||
|
|
// prepare Canvas-specific structures
|
||
|
|
var p = this.shape.points, f = p[0], r = [], c, i;
|
||
|
|
if(p.length){
|
||
|
|
if(typeof f == "number"){
|
||
|
|
r.push(f, p[1]);
|
||
|
|
i = 2;
|
||
|
|
}else{
|
||
|
|
r.push(f.x, f.y);
|
||
|
|
i = 1;
|
||
|
|
}
|
||
|
|
for(; i < p.length; ++i){
|
||
|
|
c = p[i];
|
||
|
|
if(typeof c == "number"){
|
||
|
|
r.push(c, p[++i]);
|
||
|
|
}else{
|
||
|
|
r.push(c.x, c.y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
this.canvasPolyline = r;
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
// console.debug("Polyline::_renderShape");
|
||
|
|
var p = this.canvasPolyline;
|
||
|
|
if(p.length){
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(p[0], p[1]);
|
||
|
|
for(var i = 2; i < p.length; i += 2){
|
||
|
|
ctx.lineTo(p[i], p[i + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Image", gs.Image, {
|
||
|
|
// summary: an image shape (Canvas)
|
||
|
|
setShape: function(){
|
||
|
|
g.Image.superclass.setShape.apply(this, arguments);
|
||
|
|
// prepare Canvas-specific structures
|
||
|
|
var img = new Image();
|
||
|
|
this.surface.downloadImage(img, this.shape.src);
|
||
|
|
this.canvasImage = img;
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var s = this.shape;
|
||
|
|
ctx.drawImage(this.canvasImage, s.x, s.y, s.width, s.height);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Text", gs.Text, {
|
||
|
|
// summary: a text shape (Canvas)
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var s = this.shape;
|
||
|
|
// nothing for the moment
|
||
|
|
}
|
||
|
|
});
|
||
|
|
modifyMethod(g.Text, "setFont");
|
||
|
|
|
||
|
|
var pathRenderers = {
|
||
|
|
M: "_moveToA", m: "_moveToR",
|
||
|
|
L: "_lineToA", l: "_lineToR",
|
||
|
|
H: "_hLineToA", h: "_hLineToR",
|
||
|
|
V: "_vLineToA", v: "_vLineToR",
|
||
|
|
C: "_curveToA", c: "_curveToR",
|
||
|
|
S: "_smoothCurveToA", s: "_smoothCurveToR",
|
||
|
|
Q: "_qCurveToA", q: "_qCurveToR",
|
||
|
|
T: "_qSmoothCurveToA", t: "_qSmoothCurveToR",
|
||
|
|
A: "_arcTo", a: "_arcTo",
|
||
|
|
Z: "_closePath", z: "_closePath"
|
||
|
|
};
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Path", g.path.Path, {
|
||
|
|
// summary: a path shape (Canvas)
|
||
|
|
constructor: function(){
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
setShape: function(){
|
||
|
|
this.canvasPath = [];
|
||
|
|
return g.Path.superclass.setShape.apply(this, arguments);
|
||
|
|
},
|
||
|
|
_updateWithSegment: function(segment){
|
||
|
|
var last = dojo.clone(this.last);
|
||
|
|
this[pathRenderers[segment.action]](this.canvasPath, segment.action, segment.args);
|
||
|
|
this.last = last;
|
||
|
|
g.Path.superclass._updateWithSegment.apply(this, arguments);
|
||
|
|
},
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var r = this.canvasPath;
|
||
|
|
ctx.beginPath();
|
||
|
|
for(var i = 0; i < r.length; i += 2){
|
||
|
|
ctx[r[i]].apply(ctx, r[i + 1]);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
_moveToA: function(result, action, args){
|
||
|
|
result.push("moveTo", [args[0], args[1]]);
|
||
|
|
for(var i = 2; i < args.length; i += 2){
|
||
|
|
result.push("lineTo", [args[i], args[i + 1]]);
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 2];
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_moveToR: function(result, action, args){
|
||
|
|
if("x" in this.last){
|
||
|
|
result.push("moveTo", [this.last.x += args[0], this.last.y += args[1]]);
|
||
|
|
}else{
|
||
|
|
result.push("moveTo", [this.last.x = args[0], this.last.y = args[1]]);
|
||
|
|
}
|
||
|
|
for(var i = 2; i < args.length; i += 2){
|
||
|
|
result.push("lineTo", [this.last.x += args[i], this.last.y += args[i + 1]]);
|
||
|
|
}
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_lineToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 2){
|
||
|
|
result.push("lineTo", [args[i], args[i + 1]]);
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 2];
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_lineToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 2){
|
||
|
|
result.push("lineTo", [this.last.x += args[i], this.last.y += args[i + 1]]);
|
||
|
|
}
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_hLineToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; ++i){
|
||
|
|
result.push("lineTo", [args[i], this.last.y]);
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 1];
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_hLineToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; ++i){
|
||
|
|
result.push("lineTo", [this.last.x += args[i], this.last.y]);
|
||
|
|
}
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_vLineToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; ++i){
|
||
|
|
result.push("lineTo", [this.last.x, args[i]]);
|
||
|
|
}
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_vLineToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; ++i){
|
||
|
|
result.push("lineTo", [this.last.x, this.last.y += args[i]]);
|
||
|
|
}
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_curveToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 6){
|
||
|
|
result.push("bezierCurveTo", args.slice(i, i + 6));
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 2];
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
this.lastControl.x = args[args.length - 4];
|
||
|
|
this.lastControl.y = args[args.length - 3];
|
||
|
|
this.lastControl.type = "C";
|
||
|
|
},
|
||
|
|
_curveToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 6){
|
||
|
|
result.push("bezierCurveTo", [
|
||
|
|
this.last.x + args[i],
|
||
|
|
this.last.y + args[i + 1],
|
||
|
|
this.lastControl.x = this.last.x + args[i + 2],
|
||
|
|
this.lastControl.y = this.last.y + args[i + 3],
|
||
|
|
this.last.x + args[i + 4],
|
||
|
|
this.last.y + args[i + 5]
|
||
|
|
]);
|
||
|
|
this.last.x += args[i + 4];
|
||
|
|
this.last.y += args[i + 5];
|
||
|
|
}
|
||
|
|
this.lastControl.type = "C";
|
||
|
|
},
|
||
|
|
_smoothCurveToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 4){
|
||
|
|
var valid = this.lastControl.type == "C";
|
||
|
|
result.push("bezierCurveTo", [
|
||
|
|
valid ? 2 * this.last.x - this.lastControl.x : this.last.x,
|
||
|
|
valid ? 2 * this.last.y - this.lastControl.y : this.last.y,
|
||
|
|
args[i],
|
||
|
|
args[i + 1],
|
||
|
|
args[i + 2],
|
||
|
|
args[i + 3]
|
||
|
|
]);
|
||
|
|
this.lastControl.x = args[i];
|
||
|
|
this.lastControl.y = args[i + 1];
|
||
|
|
this.lastControl.type = "C";
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 2];
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
},
|
||
|
|
_smoothCurveToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 4){
|
||
|
|
var valid = this.lastControl.type == "C";
|
||
|
|
result.push("bezierCurveTo", [
|
||
|
|
valid ? 2 * this.last.x - this.lastControl.x : this.last.x,
|
||
|
|
valid ? 2 * this.last.y - this.lastControl.y : this.last.y,
|
||
|
|
this.last.x + args[i],
|
||
|
|
this.last.y + args[i + 1],
|
||
|
|
this.last.x + args[i + 2],
|
||
|
|
this.last.y + args[i + 3]
|
||
|
|
]);
|
||
|
|
this.lastControl.x = this.last.x + args[i];
|
||
|
|
this.lastControl.y = this.last.y + args[i + 1];
|
||
|
|
this.lastControl.type = "C";
|
||
|
|
this.last.x += args[i + 2];
|
||
|
|
this.last.y += args[i + 3];
|
||
|
|
}
|
||
|
|
},
|
||
|
|
_qCurveToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 4){
|
||
|
|
result.push("quadraticCurveTo", args.slice(i, i + 4));
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 2];
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
this.lastControl.x = args[args.length - 4];
|
||
|
|
this.lastControl.y = args[args.length - 3];
|
||
|
|
this.lastControl.type = "Q";
|
||
|
|
},
|
||
|
|
_qCurveToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 4){
|
||
|
|
result.push("quadraticCurveTo", [
|
||
|
|
this.lastControl.x = this.last.x + args[i],
|
||
|
|
this.lastControl.y = this.last.y + args[i + 1],
|
||
|
|
this.last.x + args[i + 2],
|
||
|
|
this.last.y + args[i + 3]
|
||
|
|
]);
|
||
|
|
this.last.x += args[i + 2];
|
||
|
|
this.last.y += args[i + 3];
|
||
|
|
}
|
||
|
|
this.lastControl.type = "Q";
|
||
|
|
},
|
||
|
|
_qSmoothCurveToA: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 2){
|
||
|
|
var valid = this.lastControl.type == "Q";
|
||
|
|
result.push("quadraticCurveTo", [
|
||
|
|
this.lastControl.x = valid ? 2 * this.last.x - this.lastControl.x : this.last.x,
|
||
|
|
this.lastControl.y = valid ? 2 * this.last.y - this.lastControl.y : this.last.y,
|
||
|
|
args[i],
|
||
|
|
args[i + 1]
|
||
|
|
]);
|
||
|
|
this.lastControl.type = "Q";
|
||
|
|
}
|
||
|
|
this.last.x = args[args.length - 2];
|
||
|
|
this.last.y = args[args.length - 1];
|
||
|
|
},
|
||
|
|
_qSmoothCurveToR: function(result, action, args){
|
||
|
|
for(var i = 0; i < args.length; i += 2){
|
||
|
|
var valid = this.lastControl.type == "Q";
|
||
|
|
result.push("quadraticCurveTo", [
|
||
|
|
this.lastControl.x = valid ? 2 * this.last.x - this.lastControl.x : this.last.x,
|
||
|
|
this.lastControl.y = valid ? 2 * this.last.y - this.lastControl.y : this.last.y,
|
||
|
|
this.last.x + args[i],
|
||
|
|
this.last.y + args[i + 1]
|
||
|
|
]);
|
||
|
|
this.lastControl.type = "Q";
|
||
|
|
this.last.x += args[i];
|
||
|
|
this.last.y += args[i + 1];
|
||
|
|
}
|
||
|
|
},
|
||
|
|
_arcTo: function(result, action, args){
|
||
|
|
var relative = action == "a";
|
||
|
|
for(var i = 0; i < args.length; i += 7){
|
||
|
|
var x1 = args[i + 5], y1 = args[i + 6];
|
||
|
|
if(relative){
|
||
|
|
x1 += this.last.x;
|
||
|
|
y1 += this.last.y;
|
||
|
|
}
|
||
|
|
var arcs = ga.arcAsBezier(
|
||
|
|
this.last, args[i], args[i + 1], args[i + 2],
|
||
|
|
args[i + 3] ? 1 : 0, args[i + 4] ? 1 : 0,
|
||
|
|
x1, y1
|
||
|
|
);
|
||
|
|
dojo.forEach(arcs, function(p){
|
||
|
|
result.push("bezierCurveTo", p);
|
||
|
|
});
|
||
|
|
this.last.x = x1;
|
||
|
|
this.last.y = y1;
|
||
|
|
}
|
||
|
|
this.lastControl = {};
|
||
|
|
},
|
||
|
|
_closePath: function(result, action, args){
|
||
|
|
result.push("closePath", []);
|
||
|
|
this.lastControl = {};
|
||
|
|
}
|
||
|
|
});
|
||
|
|
dojo.forEach(["moveTo", "lineTo", "hLineTo", "vLineTo", "curveTo",
|
||
|
|
"smoothCurveTo", "qCurveTo", "qSmoothCurveTo", "arcTo", "closePath"],
|
||
|
|
function(method){ modifyMethod(g.Path, method); }
|
||
|
|
);
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.TextPath", g.path.TextPath, {
|
||
|
|
// summary: a text shape (Canvas)
|
||
|
|
_renderShape: function(/* Object */ ctx){
|
||
|
|
var s = this.shape;
|
||
|
|
// nothing for the moment
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.declare("dojox.gfx.Surface", gs.Surface, {
|
||
|
|
// summary: a surface object to be used for drawings (Canvas)
|
||
|
|
constructor: function(){
|
||
|
|
gs.Container._init.call(this);
|
||
|
|
this.pendingImageCount = 0;
|
||
|
|
this.makeDirty();
|
||
|
|
},
|
||
|
|
setDimensions: function(width, height){
|
||
|
|
// summary: sets the width and height of the rawNode
|
||
|
|
// width: String: width of surface, e.g., "100px"
|
||
|
|
// height: String: height of surface, e.g., "100px"
|
||
|
|
this.width = g.normalizedLength(width); // in pixels
|
||
|
|
this.height = g.normalizedLength(height); // in pixels
|
||
|
|
if(!this.rawNode) return this;
|
||
|
|
this.rawNode.width = width;
|
||
|
|
this.rawNode.height = height;
|
||
|
|
this.makeDirty();
|
||
|
|
return this; // self
|
||
|
|
},
|
||
|
|
getDimensions: function(){
|
||
|
|
// summary: returns an object with properties "width" and "height"
|
||
|
|
return this.rawNode ? {width: this.rawNode.width, height: this.rawNode.height} : null; // Object
|
||
|
|
},
|
||
|
|
_render: function(){
|
||
|
|
// summary: render the all shapes
|
||
|
|
if(this.pendingImageCount){ return; }
|
||
|
|
var ctx = this.rawNode.getContext("2d");
|
||
|
|
ctx.save();
|
||
|
|
ctx.clearRect(0, 0, this.rawNode.width, this.rawNode.height);
|
||
|
|
for(var i = 0; i < this.children.length; ++i){
|
||
|
|
this.children[i]._render(ctx);
|
||
|
|
}
|
||
|
|
ctx.restore();
|
||
|
|
if("pendingRender" in this){
|
||
|
|
clearTimeout(this.pendingRender);
|
||
|
|
delete this.pendingRender;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
makeDirty: function(){
|
||
|
|
// summary: internal method, which is called when we may need to redraw
|
||
|
|
if(!this.pendingImagesCount && !("pendingRender" in this)){
|
||
|
|
this.pendingRender = setTimeout(dojo.hitch(this, this._render), 0);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
downloadImage: function(img, url){
|
||
|
|
// summary:
|
||
|
|
// internal method, which starts an image download and renders, when it is ready
|
||
|
|
// img: Image:
|
||
|
|
// the image object
|
||
|
|
// url: String:
|
||
|
|
// the url of the image
|
||
|
|
var handler = dojo.hitch(this, this.onImageLoad);
|
||
|
|
if(!this.pendingImageCount++ && "pendingRender" in this){
|
||
|
|
clearTimeout(this.pendingRender);
|
||
|
|
delete this.pendingRender;
|
||
|
|
}
|
||
|
|
img.onload = handler;
|
||
|
|
img.onerror = handler;
|
||
|
|
img.onabort = handler;
|
||
|
|
img.src = url;
|
||
|
|
},
|
||
|
|
onImageLoad: function(){
|
||
|
|
if(!--this.pendingImageCount){ this._render(); }
|
||
|
|
},
|
||
|
|
|
||
|
|
// events are not implemented
|
||
|
|
getEventSource: function(){ return null; },
|
||
|
|
connect: function(){},
|
||
|
|
disconnect: function(){}
|
||
|
|
});
|
||
|
|
|
||
|
|
g.createSurface = function(parentNode, width, height){
|
||
|
|
// summary: creates a surface (Canvas)
|
||
|
|
// parentNode: Node: a parent node
|
||
|
|
// width: String: width of surface, e.g., "100px"
|
||
|
|
// height: String: height of surface, e.g., "100px"
|
||
|
|
|
||
|
|
if(!width){ width = "100%"; }
|
||
|
|
if(!height){ height = "100%"; }
|
||
|
|
var s = new g.Surface(),
|
||
|
|
p = dojo.byId(parentNode),
|
||
|
|
c = p.ownerDocument.createElement("canvas");
|
||
|
|
c.width = width;
|
||
|
|
c.height = height;
|
||
|
|
p.appendChild(c);
|
||
|
|
s.rawNode = c;
|
||
|
|
s._parent = p;
|
||
|
|
s.surface = s;
|
||
|
|
return s; // dojox.gfx.Surface
|
||
|
|
};
|
||
|
|
|
||
|
|
// Extenders
|
||
|
|
|
||
|
|
var C = gs.Container, Container = {
|
||
|
|
add: function(shape){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
return C.add.apply(this, arguments);
|
||
|
|
},
|
||
|
|
remove: function(shape, silently){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
return C.remove.apply(this, arguments);
|
||
|
|
},
|
||
|
|
clear: function(){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
return C.clear.apply(this, arguments);
|
||
|
|
},
|
||
|
|
_moveChildToFront: function(shape){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
return C._moveChildToFront.apply(this, arguments);
|
||
|
|
},
|
||
|
|
_moveChildToBack: function(shape){
|
||
|
|
this.surface.makeDirty();
|
||
|
|
return C._moveChildToBack.apply(this, arguments);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
dojo.mixin(gs.Creator, {
|
||
|
|
// summary: Canvas shape creators
|
||
|
|
createObject: function(shapeType, rawShape) {
|
||
|
|
// summary: creates an instance of the passed shapeType class
|
||
|
|
// shapeType: Function: a class constructor to create an instance of
|
||
|
|
// rawShape: Object: properties to be passed in to the classes "setShape" method
|
||
|
|
// overrideSize: Boolean: set the size explicitly, if true
|
||
|
|
var shape = new shapeType();
|
||
|
|
shape.surface = this.surface;
|
||
|
|
shape.setShape(rawShape);
|
||
|
|
this.add(shape);
|
||
|
|
return shape; // dojox.gfx.Shape
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
dojo.extend(g.Group, Container);
|
||
|
|
dojo.extend(g.Group, gs.Creator);
|
||
|
|
|
||
|
|
dojo.extend(g.Surface, Container);
|
||
|
|
dojo.extend(g.Surface, gs.Creator);
|
||
|
|
})();
|