Method crop

ij/src/main/java/ij/gui/Overlay.java:229–246

(Rectangle bounds)

	* Author: Marcel Boeglin
	*/
	public Overlay crop(Rectangle bounds) {
		if (bounds==null)
			return duplicate();
		Overlay overlay2 = create();
		Roi[] allRois = toArray();
		for (Roi roi: allRois) {
			Rectangle roiBounds = roi.getBounds();
			if (roiBounds.width==0) roiBounds.width=1;
			if (roiBounds.height==0) roiBounds.height=1;
			if (bounds.intersects(roiBounds))
				overlay2.add((Roi)roi.clone());
		}
		int dx = bounds.x>0?bounds.x:0;
		int dy = bounds.y>0?bounds.y:0;
		if (dx>0 || dy>0)
			overlay2.translate(-dx, -dy);
		return overlay2;
	}

	/** Removes ROIs having positions outside of the  
	* interval defined by firstSlice and lastSlice.