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Implement Curve#getOffsetOf(point) / Path#getOffsetOf(point)

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Closes #463.
This commit is contained in:
Jürg Lehni 2014-07-31 19:01:37 +02:00
parent da22161d28
commit 4d4a39c752
3 changed files with 25 additions and 2 deletions
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11
src/path/Curve.js
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@ -856,6 +856,17 @@ statics: {
return t != null ? new CurveLocation(this, t) : null;
},
/**
* Returns the length of the path from its beginning up to up to the
* specified point if it lies on the path, {@code null} otherwise.
* @param {Point} point the point on the path.
* @return {Number} the length of the path up to the specified point.
*/
getOffsetOf: function(/* point */) {
var loc = this.getLocationOf.apply(this, arguments);
return loc ? loc.getOffset() : null;
},
getNearestLocation: function(/* point */) {
var point = Point.read(arguments),
values = this.getValues(),

5
src/path/CurveLocation.js
View file

@ -152,14 +152,15 @@ var CurveLocation = Base.extend(/** @lends CurveLocation# */{
/**
* The length of the path from its beginning up to the location described
* by this object.
* by this object. If the curve is not part of a path, then the length
* within the curve is returned instead.
*
* @type Number
* @bean
*/
getOffset: function() {
var path = this.getPath();
return path && path._getOffset(this);
return path ? path._getOffset(this) : this.getCurveOffset();
},
/**

11
src/path/Path.js
View file

@ -1637,6 +1637,17 @@ var Path = PathItem.extend(/** @lends Path# */{
return null;
},
/**
* Returns the length of the path from its beginning up to up to the
* specified point if it lies on the path, {@code null} otherwise.
* @param {Point} point the point on the path.
* @return {Number} the length of the path up to the specified point.
*/
getOffsetOf: function(/* point */) {
var loc = this.getLocationOf.apply(this, arguments);
return loc ? loc.getOffset() : null;
},
/**
* Returns the curve location of the specified offset on the path.
*