Implement change propagation in matrices.

src/basic/Matrix.js

@@ -83,13 +83,15 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 	 * @param {Number} ty the translateY coordinate of the transform
 	 * @return {Matrix} this affine transform
 	 */
-	set: function(a, c, b, d, tx, ty) {
+	set: function(a, c, b, d, tx, ty, _dontNotify) {
 		this._a = a;
 		this._c = c;
 		this._b = b;
 		this._d = d;
 		this._tx = tx;
 		this._ty = ty;
+		if (!_dontNotify)
+			this._changed();
 		return this;
 	},
 
@@ -97,6 +99,11 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		return Base.serialize(this.getValues(), options);
 	},
 
+	_changed: function() {
+		if (this._owner)
+			this._owner._changed(/*#=*/ Change.GEOMETRY);
+	},
+
 	/**
 	 * @return {Matrix} a copy of this transform
 	 */
@@ -136,6 +143,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 	reset: function() {
 		this._a = this._d = 1;
 		this._c = this._b = this._tx = this._ty = 0;
+		this._changed();
 		return this;
 	},
 
@@ -171,6 +179,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		this._d *= scale.y;
 		if (center)
 			this.translate(center.negate());
+		this._changed();
 		return this;
 	},
 
@@ -197,6 +206,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 			y = point.y;
 		this._tx += x * this._a + y * this._b;
 		this._ty += x * this._c + y * this._d;
+		this._changed();
 		return this;
 	},
 
@@ -241,6 +251,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		this._d = -sin * c + cos * d;
 		this._tx += tx * a + ty * b;
 		this._ty += tx * c + ty * d;
+		this._changed();
 		return this;
 	},
 
@@ -278,6 +289,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		this._d += point.x * c;
 		if (center)
 			this.translate(center.negate());
+		this._changed();
 		return this;
 	},
 
@@ -298,6 +310,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		this._d = mx._b * c + mx._d * d;
 		this._tx += mx._tx * a + mx._ty * b;
 		this._ty += mx._tx * c + mx._ty * d;
+		this._changed();
 		return this;
 	},
 
@@ -320,6 +333,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		this._d = mx._c * b + mx._d * d;
 		this._tx = mx._a * tx + mx._b * ty + mx._tx;
 		this._ty = mx._c * tx + mx._d * ty + mx._ty;
+		this._changed();
 		return this;
 	},
 
@@ -327,8 +341,8 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 	 * @return {Boolean} whether this transform is the identity transform
 	 */
 	isIdentity: function() {
-		return this._a == 1 && this._c == 0 && this._b == 0 && this._d == 1
+		return this._a === 1 && this._c === 0 && this._b === 0 && this._d === 1
-				&& this._tx == 0 && this._ty == 0;
+				&& this._tx === 0 && this._ty === 0;
 	},
 
 	/**
@@ -386,7 +400,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 	 * A faster version of transform that only takes one point and does not
 	 * attempt to convert it.
 	 */
-	_transformPoint: function(point, dest, dontNotify) {
+	_transformPoint: function(point, dest, _dontNotify) {
 		var x = point.x,
 			y = point.y;
 		if (!dest)
@@ -394,7 +408,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		return dest.set(
 			x * this._a + y * this._b + this._tx,
 			x * this._c + y * this._d + this._ty,
-			dontNotify
+			_dontNotify
 		);
 	},
 
@@ -425,7 +439,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 	 * point and finding the new bounding box to these points. This is not
 	 * really the transformed reactangle!
 	 */
-	_transformBounds: function(bounds, dest, dontNotify) {
+	_transformBounds: function(bounds, dest, _dontNotify) {
 		var coords = this._transformCorners(bounds),
 			min = coords.slice(0, 2),
 			max = coords.slice();
@@ -440,7 +454,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		if (!dest)
 			dest = new Rectangle();
 		return dest.set(min[0], min[1], max[0] - min[0], max[1] - min[1],
-				dontNotify);
+				_dontNotify);
 	},
 
 	/**
@@ -463,7 +477,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 				? det : null;
 	},
 
-	_inverseTransform: function(point, dest, dontNotify) {
+	_inverseTransform: function(point, dest, _dontNotify) {
 		var det = this._getDeterminant();
 		if (!det)
 			return null;
@@ -474,7 +488,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		return dest.set(
 			(x * this._d - y * this._b) / det,
 			(y * this._a - x * this._c) / det,
-			dontNotify
+			_dontNotify
 		);
 	},
 
@@ -659,6 +673,7 @@ var Matrix = Base.extend(/** @lends Matrix# */{
 		};
 		this['set' + name] = function(value) {
 			this[prop] = value;
+			this._changed();
 		};
 	}, {});
 });

src/basic/Point.js

@@ -932,10 +932,10 @@ var LinkedPoint = Point.extend({
 		this._setter = setter;
 	},
 
-	set: function(x, y, dontNotify) {
+	set: function(x, y, _dontNotify) {
 		this._x = x;
 		this._y = y;
-		if (!dontNotify)
+		if (!_dontNotify)
 			this._owner[this._setter](this);
 		return this;
 	},

src/basic/Rectangle.js

@@ -829,12 +829,12 @@ var LinkedRectangle = Rectangle.extend({
 		this._setter = setter;
 	},
 
-	set: function(x, y, width, height, dontNotify) {
+	set: function(x, y, width, height, _dontNotify) {
 		this._x = x;
 		this._y = y;
 		this._width = width;
 		this._height = height;
-		if (!dontNotify)
+		if (!_dontNotify)
 			this._owner[this._setter](this);
 		return this;
 	}

src/basic/Size.js

@@ -537,10 +537,10 @@ var LinkedSize = Size.extend({
 		this._setter = setter;
 	},
 
-	set: function(width, height, dontNotify) {
+	set: function(width, height, _dontNotify) {
 		this._width = width;
 		this._height = height;
-		if (!dontNotify)
+		if (!_dontNotify)
 			this._owner[this._setter](this);
 		return this;
 	},

src/item/Item.js

@@ -83,9 +83,10 @@ var Item = Base.extend(Callback, /** @lends Item# */{
 			}
 		}
 		this._style = new Style(this._project._currentStyle, this);
-		this._matrix = new Matrix();
+		var matrix = this._matrix = new Matrix();
 		if (point)
-			this._matrix.translate(point);
+			matrix.translate(point);
+		matrix._owner = this;
 		return props ? this._set(props, { insert: true }) : true;
 	},
 

src/ui/View.js

@@ -97,7 +97,7 @@ var View = Base.extend(Callback, /** @lends View# */{
 		// Link this id to our view
 		View._viewsById[this._id] = this;
 		this._viewSize = size;
-		this._matrix = new Matrix();
+		(this._matrix = new Matrix())._owner = this;
 		this._zoom = 1;
 		// Make sure the first view is focused for keyboard input straight away
 		if (!View._focused)
@@ -256,6 +256,17 @@ var View = Base.extend(Callback, /** @lends View# */{
 		}
 	},
 
+	/**
+	 * Private notifier that is called whenever a change occurs in this view.
+	 * Used only by Matrix for now.
+	 *
+	 * @param {ChangeFlag} flags describes what exactly has changed.
+	 */
+	_changed: function(flags) {
+		if (flags & /*#=*/ ChangeFlag.APPEARANCE)
+			this._project._needsRedraw = true;
+	},
+
 	_transform: function(matrix) {
 		this._matrix.concatenate(matrix);
 		// Force recalculation of these values next time they are requested.