Name: akC57697 Date: 03/12/98



The SwingUtilities.computeDifference() returns rectangles outside of the given.

Javadoc says:
"
public static Rectangle[] computeDifference(Rectangle rectA,Rectangle rectB)

Convenience returning an array of rect representing the regions within
                                                                ^^^^^^
rectA that do not overlap with rectB. If the
two Rects do not overlap, return an empty array
"


-----------------------Example--------------------
import java.awt.swing.SwingUtilities;
import java.awt.Rectangle;
public class SwingUtilitiesTest {
    public static void main(String s[]) {
    
  Rectangle main_rec = new Rectangle(0,0,500,500);
  Rectangle inner_rec = new Rectangle(400,200,100,100); // In the main_rec
  Rectangle result []=null;

 
  // Verify the rectangles
  if (!SwingUtilities.isRectangleContainingRectangle(main_rec,inner_rec)) {
       System.out.println("The given rectangle "+inner_rec+" out of "+main_rec);
       return;
  }

  result=SwingUtilities.computeDifference(main_rec,inner_rec);

   for (int i=0;i<result.length; i++) {
    if (!(SwingUtilities.isRectangleContainingRectangle(main_rec,result[i]))) {
       System.out.println("The "+i+"th rectangle "+result[i]+" out of "+main_rec);
       return;
    }
   }
  }
}

--------------------------------------------------
Output:
The 2th rectangle java.awt.Rectangle[x=400,y=300,width=100,height=400]
out of java.awt.Rectangle[x=0,y=0,width=500,height=500]


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