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Improve handling of _changed() events in Segment.

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This commit is contained in:
Jürg Lehni 2014-03-12 22:58:00 +01:00
parent dc76ef144e
commit 847060e146
1 changed files with 21 additions and 18 deletions
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39
src/path/Segment.js
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@ -150,25 +150,27 @@ var Segment = Base.extend(/** @lends Segment# */{
},
_changed: function(point) {
if (!this._path)
var path = this._path;
if (!path)
return;
// Delegate changes to affected curves if they exist. Check _curves
// first to make sure we're not creating it by calling this.getCurve().
var curve = this._path._curves && this.getCurve(),
other;
if (curve) {
curve._changed();
// Get the other affected curve, which is the previous one for
// _point or _handleIn changing when this segment is _segment1 of
// the curve, for all other cases it's the next (e.g. _handleOut
// when this segment is _segment2)
if (other = (curve[point == this._point
|| point == this._handleIn && curve._segment1 == this
? 'getPrevious' : 'getNext']())) {
other._changed();
}
// Delegate changes to affected curves if they exist.
var curves = path._curves,
index = this._index,
curveIn, curveOut;
if (curves) {
// Updated the neighboring affected curves, depending on which point
// is changing.
// TODO: Consider exposing these curves too, through #curveIn,
// and #curveOut, next to #curve?
if ((!point || point === this._point || point === this._handleIn)
&& (curveIn = curves[index - 1]
|| path._closed && curves[curves.length - 1]))
curveIn._changed();
if ((!point || point === this._point || point === this._handleOut)
&& (curveOut = curves[index]))
curveOut._changed();
}
this._path._changed(/*#=*/ Change.GEOMETRY);
path._changed(/*#=*/ Change.GEOMETRY);
},
/**
@ -373,7 +375,8 @@ var Segment = Base.extend(/** @lends Segment# */{
},
/**
* The curve that the segment belongs to.
* The curve that the segment belongs to. For the last segment of an open
* path, the previous segment is returned.
*
* @type Curve
* @bean