From: Hans Muller <hmuller@Eng>
To: ###@###.###
Cc: ###@###.###
Subject: JComponent's getSize, getBounds, etc.
Date: Mon, 2 Feb 1998 08:04:00 -0800


Good point, we'll try and get that in for Swing1.0.

- Hans


Rich Kadel writes:
 > In your new versions of getSize, etc. that take an object as a parameter
 > (so it doesn't have to allocate one), I recommend that you check for
 > null, then allocate one and return it only if null. This would be much
 > simpler and safer to use. For instance:
 >
 > public class SomeClass extends JComponent {
 > private Dimension size;
 >
 > public void doSomething() {
 > size = getSize(size);
 > // size is definitely valid now, and the newly allocated pointer
 > can now be reused
 > }
 > }
 >
 > Of course, this only works if getSize is implemented as:
 >
 > public Dimension getSize(Dimension rv) {
 > if (rv == null) rv = new Dimension();
 > rv.setSize(_bounds.width, _bounds.height);
 > return rv;
 > }
 >
 > This adds one line of code and doesn't break the existing
 > implementation.
 >
 > Thanks,
 > Rich
 > --
 >
 > |-------------------------------------------------------------------
 > | Rich Kadel
 > | DTAI, Incorporated - http://www.dtai.com
 > | mailto:###@###.###
 > | snailto: 3900 Harney Street, San Diego, CA 92110
 > | (619) 542-1700 - (FAX) 542-8675
 > |-------------------------------------------------------------------
 > | Java, C++, HTML, CGI, Windows, Unix, DBMS, 3D, ...
 > |-------------------------------------------------------------------
 >
 >
 >