🚀 go-pugleaf

hello, John
thank you for your help. your ideea with creating a border is good, but
what i actually wanted to do is draw about five "concentric" rectangles
around
the button. like this:
   for(int i=10; i<60;i+=10)
      g.drawRect( X0-i, Y0-i, width+2*i, height+2*i);
 
but they get misplaced, so i broke down the problem to trying to draw a
rectangle
that correctly surrounds my button. i just cant make the rectangle have
the same symmetry center as the button.

about the super.paint() call, it is in my code, i just forgot to write
it in the email.



John P. McGrath wrote:
> 
> On Sun, 19 Dec 1999 06:46:46 +0200, George Lefter wrote:
> 
> > hello. how can i draw a rectangle exactly on a button's border/edges?
> > the code below draws the rectangle above and in the left of the button..
> > how should i change the line g.drawRect(..) ?
> 
> Instead of trying to draw this yourself, you could set the border
> property for the button.  Use something like:
> 
>     button.setBorder( BorderFactory.createLineBorder( Color.black ) );
> 
> If the button already has a border, and you want to create an additional
> one, then you could use a CompoundBorder, including the border that it
> has, plus the new one you want to add.
> 
> 
> A few notes on the above code:
> 
> If you are going to write your own paint code for a Swing component, you
> usually should override paintComponent() instead of paint().  The paint()
> method calls paintComponent(), but it also handles painting the child
> components, and painting the borders.  Note that whether it has any
> children is part of the implementation of the component, so you probably
> should not assume it does not.  Even if the current implementation does
> not, a future one may.
> 
> Also, for both paint() and paintComponent(), you usually should call the
> superclass implementation first, unless you want to eliminate some of its
> behavior.  If you do not, you may be eliminating some behavior that you
> want.  For instance, the superclass handles painting the component
> background.  For example:
> 
>     public void paintComponent( Graphics g ) {
>         super.paintComponent( g );
>         //  do additional stuff.
>     }