Return 'this' in more places to facilitate chained calls inside the library.

src/color/Gradient.js

@@ -105,6 +105,7 @@ var Gradient = this.Gradient = Base.extend(/** @lends Gradient# */{
 				stop.setRampPoint(i / (l - 1));
 		}
 		this._changed();
+		return this;
 	},
 
 	/**

src/item/Item.js

@@ -206,6 +206,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 				this._project._changes.push(entry);
 			}
 		}
+		return this;
 	},
 
 	/**
@@ -268,7 +269,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 			(namedChildren[name] = namedChildren[name] || []).push(this);
 			children[name] = this;
 		}
-		this._changed(/*#=*/ ChangeFlag.ATTRIBUTE);
+		return this._changed(/*#=*/ ChangeFlag.ATTRIBUTE);
 	},
 
 	/**
@@ -328,7 +329,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 			if (value != this[name]) {
 				this[name] = value;
 				// #locked does not change appearance, all others do:
-				this._changed(name === '_locked'
+				return this._changed(name === '_locked'
 						? /*#=*/ ChangeFlag.ATTRIBUTE : /*#=*/ Change.ATTRIBUTE);
 			}
 		};
@@ -480,6 +481,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 			this._project._updateSelection(this);
 			this._changed(/*#=*/ Change.ATTRIBUTE);
 		}
+		return this;
 	},
 
 	_selected: false,
@@ -501,7 +503,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 				this._children[i].setFullySelected(selected);
 		}
 		// Pass true for hidden noChildren argument
-		this.setSelected(selected, true);
+		return this.setSelected(selected, true);
 	},
 
 	/**
@@ -530,6 +532,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 			if (this._parent)
 				this._parent._changed(/*#=*/ ChangeFlag.CLIPPING);
 		}
+		return this;
 	},
 
 	_clipMask: false,
@@ -588,7 +591,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 		// Calculate the distance to the current position, by which to
 		// translate the item. Pass true for dontLink, as we do not need a
 		// LinkedPoint to simply calculate this distance.
-		this.translate(Point.read(arguments).subtract(this.getPosition(true)));
+		return this.translate(Point.read(arguments).subtract(this.getPosition(true)));
 	},
 
 	/**
@@ -605,7 +608,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 	setMatrix: function(matrix) {
 		// Use Matrix#initialize to easily copy over values.
 		this._matrix.initialize(matrix);
-		this._changed(/*#=*/ Change.GEOMETRY);
+		return this._changed(/*#=*/ Change.GEOMETRY);
 	},
 
 	/**
@@ -1223,7 +1226,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 	 * @param {Item[]} items The items to be added as children
 	 */
 	addChildren: function(items) {
-		this.insertChildren(this._children.length, items);
+		return this.insertChildren(this._children.length, items);
 	},
 
 	/**
@@ -1239,10 +1242,12 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 		// an Item#children array. Use Array.prototype.slice because
 		// in certain cases items is an arguments object
 		items = items && Array.prototype.slice.apply(items);
-		for (var i = 0, l = items && items.length; i < l; i++) {
-			if (this.insertChild(index, items[i]))
-				index++;
+		var i = index;
+		for (var j = 0, l = items && items.length; j < l; j++) {
+			if (this.insertChild(i, items[j]))
+				i++;
 		}
+		return i != index;
 	},
 
 	/**
@@ -1417,6 +1422,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 				this._children[i]._index = i;
 			this._changed(/*#=*/ Change.HIERARCHY);
 		}
+		return this;
 	},
 
 	// TODO: Item#isEditable is currently ignored in the documentation, as
@@ -2021,7 +2027,7 @@ var Item = this.Item = Base.extend(Callback, /** @lends Item# */{
 			newBounds = new Rectangle(new Point(),
 					Size.create(bounds.width * scale, bounds.height * scale));
 		newBounds.setCenter(rectangle.getCenter());
-		this.setBounds(newBounds);
+		return this.setBounds(newBounds);
 	},
 
 	toString: function() {

src/path/Path.js

@@ -115,6 +115,7 @@ var Path = this.Path = PathItem.extend(/** @lends Path# */{
 		// Make sure new curves are calculated next time we call getCurves()
 		delete this._curves;
 		this._add(Segment.readAll(segments));
+		return this;
 	},
 
 	/**
@@ -229,6 +230,7 @@ var Path = this.Path = PathItem.extend(/** @lends Path# */{
 			}
 			this._changed(/*#=*/ Change.GEOMETRY);
 		}
+		return this;
 	},
 
 	// TODO: Consider adding getSubPath(a, b), returning a part of the current
@@ -683,7 +685,7 @@ var Path = this.Path = PathItem.extend(/** @lends Path# */{
 			this._segments[i]._selectionState = selected
 					? /*#=*/ SelectionState.POINT : 0;
 		// No need to pass true for noChildren since Path has none anyway.
-		this.setSelected(selected);
+		return this.setSelected(selected);
 	},
 
 	_updateSelection: function(segment, oldState, newState) {
@@ -738,7 +740,7 @@ var Path = this.Path = PathItem.extend(/** @lends Path# */{
 			segments.push(new Segment(flattener.evaluate(pos, 0)));
 			pos += step;
 		}
-		this.setSegments(segments);
+		return this.setSegments(segments);
 	},
 
 	/**
@@ -785,6 +787,7 @@ var Path = this.Path = PathItem.extend(/** @lends Path# */{
 			var fitter = new PathFitter(this, tolerance || 2.5);
 			this.setSegments(fitter.fit());
 		}
+		return this;
 	},
 
 	// TODO: reduceSegments([flatness])

src/style/Style.js

@@ -67,6 +67,7 @@ var Style = Item.extend({
 
 			owner['set' + stylePart] = function(style) {
 				this[styleKey].initialize(style);
+				return this;
 			};
 
 			Base.each(src._defaults, function(value, key) {