Method invert

ij/src/main/java/ij/plugin/Selection.java:702–711

(ImagePlus imp)

	}
	
	void invert(ImagePlus imp) {
		Roi roi = imp.getRoi();
		if (roi == null)
			{run("all"); return;}
		if (!roi.isArea())
			{IJ.error("Inverse", "Area selection required"); return;}
		Roi inverse = roi.getInverse(imp);
		Undo.setup(Undo.ROI, imp);
		imp.setRoi(inverse);
	}
	
	private void lineToArea(ImagePlus imp) {
		Roi roi = imp.getRoi();