ColorLayer besitzt nun die üblichen setColor Methoden

src/schule/ngb/zm/ColorLayer.java

@@ -9,11 +9,37 @@ public class ColorLayer extends Layer {
 		clear();
 	}
 
+	@Override
+	public void setSize( int width, int height ) {
+		super.setSize(width, height);
+		clear();
+	}
+
+	public Color getColor() {
+		return background;
+	}
+
 	public void setColor( Color color ) {
 		background = color;
 		clear();
 	}
 
+	public void setColor( int gray ) {
+		setColor(gray, gray, gray, 255);
+	}
+
+	public void setColor( int gray, int alpha ) {
+		setColor(gray, gray, gray, alpha);
+	}
+
+	public void setColor( int red, int green, int blue ) {
+		setColor(red, green, blue, 255);
+	}
+
+	public void setColor( int red, int green, int blue, int alpha ) {
+		setColor(new Color(red, green, blue, alpha));
+	}
+
 	@Override
 	public void clear() {
 		drawing.setColor(background.getColor());