Split Panes, Frame and Resizing

Question

Hi,
my user interface is made up of a message panel using the created class SplitPanes2 through the method createSplitPanes called from a class that extends Frame. (will post code if required: lengthy). When the frame is resized/maximized, the splitPanes remain at their preferred size. How can I work on it such that the SplitPanes will resize proportionally too? Please inform me if I have overlooked certain details.
-cyndi
public class AppLayout {
     Frame parent;
     public AppLayout() {
     public void createSplitPanes( Panel messagePanel, TextArea messageAreaOut, TextArea messageAreaIn, TextArea messageArea ) {
          Panel splitPane2 = new SplitPane2( messageAreaOut, messageAreaIn, messageArea );
          messagePanel.setLayout( new GridLayout(1, 1));
          messagePanel.add(splitPane2);
     public class SplitPane2 extends Panel {
          public SplitPane2( TextArea messageAreaIn, TextArea messageAreaOut, TextArea messageArea ) {
               //Create an instance of splitPane
               splitPane sPane2  = new splitPane( messageAreaOut, messageAreaIn );
               JSplitPane left    = sPane2.getSplitPane();
               //XXXX: Bug #4131528, borders on nested split panes accumulate.
               //Workaround: Set the border on any split pane within
               //another split pane to null. Components within nested split
               //panes need to have their own border for this to work well.
               left.setBorder( null );
               //Create a split pane and put "left" (a split pane)
               //and TextArea instance in it.
               JSplitPane sPane   = new JSplitPane( JSplitPane.HORIZONTAL_SPLIT,
                    left, messageArea );
               //splitPane.setOneTouchExpandable(true);
               sPane.setDividerLocation( 150 );
               sPane.setResizeWeight( 0.5 );
               //Add the split pane to this frame
               sPane.setPreferredSize( new Dimension( 400, 430 ) );
               add( sPane );
          class splitPane {
               JSplitPane sPane;
               public splitPane( TextArea messageAreaOut, TextArea messageAreaIn ) {
                    //Read image names from a properties file
                    sPane = new JSplitPane( JSplitPane.VERTICAL_SPLIT,
                         messageAreaIn, messageAreaOut );
                    //splitPane.setOneTouchExpandable(true);
                    sPane.setDividerLocation( 0.5 );
                    sPane.setResizeWeight( 0.5 );
                    //Provide a preferred size for the split pane
                    sPane.setPreferredSize( new Dimension( 150, 350 ) );
               public JSplitPane getSplitPane() {
                    return sPane;

Answer 1

Hi, I'm not sure, but I think I had a similar problem. I tried to place a JSplitPane inside a JPanel and then I got the same behaviour as you describe. Unfortunately I didn't find out why that happened. I simply didn't use the JPanel and then it worked as I wanted it to. (Almost) :)