Fix SVGKnob getChildrenBoundingBox when forcing it to rescale with

box.size

include/widgets.hpp

@@ -69,7 +69,7 @@ struct Widget {
 
 	virtual ~Widget();
 
-	Rect getChildrenBoundingBox();
+	virtual Rect getChildrenBoundingBox();
 	/**  Returns `v` transformed into the coordinate system of `relative` */
 	virtual Vec getRelativeOffset(Vec v, Widget *relative);
 	/** Returns `v` transformed into world coordinates */
@@ -159,6 +159,7 @@ struct TransformWidget : Widget {
 	/** The transformation matrix */
 	float transform[6];
 	TransformWidget();
+	Rect getChildrenBoundingBox() override;
 	void identity();
 	void translate(Vec delta);
 	void rotate(float angle);

src/app/RackWidget.cpp

@@ -348,7 +348,6 @@ void RackWidget::step() {
 		Vec cellMargin = Vec(20, 1);
 		rails->box.pos = bound.pos.div(RACK_GRID_SIZE).floor().minus(cellMargin).mult(RACK_GRID_SIZE);
 		rails->box.size = bound.size.plus(cellMargin.mult(RACK_GRID_SIZE).mult(2));
-		printf("%f %f %f %f\n", rails->box.pos.x, rails->box.pos.y, rails->box.size.x, rails->box.size.y);
 		rails->dirty = true;
 
 		rail->box.size = rails->box.size;

src/app/SVGKnob.cpp

@@ -22,6 +22,7 @@ void SVGKnob::setSVG(std::shared_ptr<SVG> svg) {
 void SVGKnob::step() {
 	// Re-transform TransformWidget if dirty
 	if (dirty) {
+		tw->box.size = box.size;
 		float angle = rescalef(value, minValue, maxValue, minAngle, maxAngle);
 		tw->identity();
 		// Scale SVG to box

src/widgets/TransformWidget.cpp

@@ -8,6 +8,16 @@ TransformWidget::TransformWidget() {
 	identity();
 }
 
+Rect TransformWidget::getChildrenBoundingBox() {
+	Rect bound = Widget::getChildrenBoundingBox();
+	Vec topLeft = bound.pos;
+	Vec bottomRight = bound.getBottomRight();
+	nvgTransformPoint(&topLeft.x, &topLeft.y, transform, topLeft.x, topLeft.y);
+	nvgTransformPoint(&bottomRight.x, &bottomRight.y, transform, bottomRight.x, bottomRight.y);
+	printf("%f\n", 42.1);
+	return Rect(topLeft, bottomRight.minus(topLeft));
+}
+
 void TransformWidget::identity() {
 	nvgTransformIdentity(transform);
 }