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Implement PointText#bounds properly, with matrix support in place now.

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This commit is contained in:
Jürg Lehni 2011-11-26 11:40:38 +01:00
parent a0ad81b576
commit 40a3272cb3
1 changed files with 13 additions and 14 deletions
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27
src/text/PointText.js
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@ -99,12 +99,10 @@ var PointText = this.PointText = TextItem.extend(/** @lends PointText# */{
return {
_getBounds: function(baseItem, type, matrix) {
// If there is no text, there are no bounds
if (!this._content)
return new Rectangle();
// Create an in-memory canvas on which to do the measuring
if (!context)
context = CanvasProvider.getCanvas(Size.create(1, 1)).getContext('2d');
context = CanvasProvider.getCanvas(
Size.create(1, 1)).getContext('2d');
var justification = this.getJustification(),
x = 0;
// Measure the real width of the text. Unfortunately, there is no
@ -112,18 +110,19 @@ var PointText = this.PointText = TextItem.extend(/** @lends PointText# */{
context.font = this.getFontSize() + 'px ' + this.getFont();
var width = 0;
for (var i = 0, l = this._lines.length; i < l; i++)
width = Math.max(width, context.measureText(this._lines[i]).width);
width = Math.max(width, context.measureText(
this._lines[i]).width);
// Adjust for different justifications
if (justification != 'left')
if (justification !== 'left')
x -= width / (justification === 'center' ? 2: 1);
var leading = this.getLeading();
var count = this._lines.length;
// Until we don't have baseline measuring, assume leading / 4 as a
// rough guess
var bounds = Rectangle.create(x, leading / 4 + (count - 1) * leading,
width, -count * leading);
// TODO: matrix!
return this._matrix._transformBounds(bounds, bounds);
var leading = this.getLeading(),
count = this._lines.length,
// Until we don't have baseline measuring, assume leading / 4 as
// a rough guess:
bounds = Rectangle.create(x,
count ? leading / 4 + (count - 1) * leading : 0,
width, -count * leading);
return matrix ? matrix._transformBounds(bounds, bounds) : bounds;
}
};
});