Question

I am trying to determine if clickRectangle, a rectangle created by the click of a mouse, on a canvas intersects with a drawnRectangle or not.

However, I don’t want the intersects method to return true if I click anywhere in the drawnRectangle (i.e. the interior of the rectangle), I just want it to return true if an outer boundary of drawnRectangle was clicked.

How can I do that?

P.S: For clickRectangle and drawnRectangle see my comment below.

Answer 1

If I understand the question correctly, you want

public static boolean pointNearEdge(Point click, Rectangle drawnRectangle, int howNear){
   Rectangle clickRect = new Rectangle(click.x-howNear, click.y-howNear, howNear*2, howNear*2);
   if (drawnRectangle.contains(clickRect))  // totally inside -> false
      return false;

   // test if there is a partial intersection - i.e. we are near the edge
   return drawnRectangle.intersects(clickRect);
}