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use native stroke dash for selection area (#3309)

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* use native stroke dash for selection area

* check support at init
This commit is contained in:
Andrea Bogazzi 2016-10-02 09:31:32 +02:00 committed by GitHub
parent 89593190bb
commit 51835c1224
1 changed files with 15 additions and 8 deletions
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23
src/canvas.class.js
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@ -5,6 +5,7 @@
radiansToDegrees = fabric.util.radiansToDegrees,
atan2 = Math.atan2,
abs = Math.abs,
supportLineDash = fabric.StaticCanvas.supports('setLineDash'),
STROKE_OFFSET = 0.5;
@ -980,20 +981,25 @@
aleft = abs(left),
atop = abs(top);
ctx.fillStyle = this.selectionColor;
if (this.selectionColor) {
ctx.fillStyle = this.selectionColor;
ctx.fillRect(
groupSelector.ex - ((left > 0) ? 0 : -left),
groupSelector.ey - ((top > 0) ? 0 : -top),
aleft,
atop
);
ctx.fillRect(
groupSelector.ex - ((left > 0) ? 0 : -left),
groupSelector.ey - ((top > 0) ? 0 : -top),
aleft,
atop
);
}
if (!this.selectionLineWidth || !this.selectionBorderColor) {
return;
}
ctx.lineWidth = this.selectionLineWidth;
ctx.strokeStyle = this.selectionBorderColor;
// selection border
if (this.selectionDashArray.length > 1) {
if (this.selectionDashArray.length > 1 && !supportLineDash) {
var px = groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft),
py = groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop);
@ -1009,6 +1015,7 @@
ctx.stroke();
}
else {
fabric.Object.prototype._setLineDash.call(this, ctx, this.selectionDashArray);
ctx.strokeRect(
groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft),
groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop),