Inconsistent JFrame layout

Question

I have a JFrame which displays two JSplitPanes (one inside the other).

For some reason the divider location is inconsistent.

What I mean by that is that sometimes its displayed on the correct position where I have set it, while other times it doesn't. When the position is wrong, its wrong for both split panels. Here is the code I am using for the JSplitPanes:

        JPanel javaPanel = core.getComponentPanel(2);
        JSplitPane splitA = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
                javaPanel.getComponent(0), javaPanel.getComponent(1));
        double pos = (screenDim.getHeight() * 72) / 100;
        splitA.setDividerLocation((int) pos);
        JSplitPane mainSplitP = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
                new JScrollPane(getCoreComponents()), splitA);
        return mainSplitP;

On the JFrame I have a JPanel with CardLayout. To add the mainSplitP I use the following method:

    private void setFrameContent(Container content, String title) {
        appContent.add(content, title);
        CardLayout cl = (CardLayout) (appContent.getLayout());
        cl.show(appContent, title);
        appFrame.pack();
    }

What could be causing this inconsistency ?

I think the layout manager you are using has something to do with your issue. — Eng.Fouad, Apr 04 '12 at 13:51
Layout is CardLayout. And shouldn't I always get the same result? — Giannis, Apr 04 '12 at 13:52
TRy to surround divider location set in SwingUtilities.invokeLater — StanislavL, Apr 04 '12 at 13:54
And note that Swing GUI objects should be constructed and manipulated _only_ on the [event dispatch thread](http://download.oracle.com/javase/tutorial/uiswing/concurrency/initial.html). — trashgod, Apr 04 '12 at 16:11

score 2 · Accepted Answer · edited May 23 '17 at 10:34

2

JComponents knows own size after pack(), or when they're once time visible on the screen
wrap JSplitPane's setDividerLocation to the invokeLater

edited May 23 '17 at 10:34

Community

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answered Apr 04 '12 at 13:57

mKorbel

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Had to add some ugly code with casting but at least it works. Thanks ! – Giannis Apr 04 '12 at 14:16
One more thing. Is there a way to have the divider location based on the preferred size of the components the JSplitPane contains ? That way since my components got a set preferred size I might not need to set the location manually ? – Giannis Apr 04 '12 at 14:23

Inconsistent JFrame layout

1 Answers1