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Improve comments for bounds functions.

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This commit is contained in:
Jürg Lehni 2011-07-04 23:28:28 +02:00
parent 9499125b22
commit 110cffc14c
1 changed files with 3 additions and 3 deletions
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6
src/item/PlacedItem.js
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@ -60,11 +60,11 @@ var PlacedItem = this.PlacedItem = Item.extend(/** @lends PlacedItem# */{
},
getBounds: function(/* matrix */) {
// The bounds of PlacedItems are the same as the strokeBounds, but are
// wrapped in a LinkedRectangle that catch changes for us.
var useCache = arguments[0] === undefined;
if (useCache && this._bounds)
return this._bounds;
// The bounds of PlacedItems are the same as the strokeBounds, but are
// wrapped in a LinkedRectangle that catch changes for us.
var bounds = this.getStrokeBounds(arguments[0]);
if (useCache)
bounds = this._bounds = this._createBounds(bounds);
@ -76,11 +76,11 @@ var PlacedItem = this.PlacedItem = Item.extend(/** @lends PlacedItem# */{
useCache = matrix === undefined;
if (useCache && this[cacheName])
return this[cacheName];
// Concatenate the passed matrix with the internal one
matrix = matrix ? matrix.clone().concatenate(this._matrix)
: this._matrix;
// Call _calculateBounds, which needs to be defined in the subclasses:
var bounds = this._calculateBounds(getter, matrix);
// TODO: Clear cache
if (useCache)
this[cacheName] = bounds;
return bounds;