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package sun.awt;

This interface can be implemented on a Graphics object to allow
the lightweight component code to permanently install a rectangular
maximum clip that cannot be extended with setClip and which works in
conjunction with the hit() and getTransform() methods of Graphics2D
to make it appear as if there really was a component with these
dimensions.
/**
 * This interface can be implemented on a Graphics object to allow
 * the lightweight component code to permanently install a rectangular
 * maximum clip that cannot be extended with setClip and which works in
 * conjunction with the hit() and getTransform() methods of Graphics2D
 * to make it appear as if there really was a component with these
 * dimensions.
 */
public interface ConstrainableGraphics {
    
Constrain this graphics object to have a permanent device space
origin of (x, y) and a permanent maximum clip of (x,y,w,h).
Calling this method is roughly equivalent to:
   g.translate(x, y);
   g.clipRect(0, 0, w, h);
except that the clip can never be extended outside of these
bounds, even with setClip() and for the fact that the (x,y)
become a new device space coordinate origin.
These methods are recursive so that you can further restrict
the object by calling the constrain() method more times, but
you can never enlarge its restricted maximum clip.
/**
     * Constrain this graphics object to have a permanent device space
     * origin of (x, y) and a permanent maximum clip of (x,y,w,h).
     * Calling this method is roughly equivalent to:
     *    g.translate(x, y);
     *    g.clipRect(0, 0, w, h);
     * except that the clip can never be extended outside of these
     * bounds, even with setClip() and for the fact that the (x,y)
     * become a new device space coordinate origin.
     *
     * These methods are recursive so that you can further restrict
     * the object by calling the constrain() method more times, but
     * you can never enlarge its restricted maximum clip.
     */
    public void constrain(int x, int y, int w, int h);
}