CODEWITHSUNDEEP
javaswing
Nico Huysamen
Nico Huysamen

Reputation: 10417

How to make Java Swing components fill available space?

I cannot seem to get my Java Swing components to work together correctly.

What I want to do, is have a JPanel fill ALL the space available inside a JTabbedPane. At the moment, my setup is as follows:

public class Gui extends JFrame {
    private final EventBus eventBus = EventBus.getInstance();
    private final ToolkitUtil toolkitUtil;
    private final Menu menu;
    private final InfoBar infoBar;
    private final JTabbedPane pane;

    ...

    private void buildLayout() {
        GridBagConstraints gbc = new GridBagConstraints();

        setJMenuBar(menu);

        add(pane, BorderLayout.CENTER);
        add(infoBar, BorderLayout.SOUTH);

        pane.addTab("Plugins", new PluginPanel());
    }
}

public class PluginPanel extends JPanel {
    private final JPanel modelPanel;
    private final JPanel editorPanel;

    public PluginPanel() {
        setLayout(new GridBagLayout());

        modelPanel = new JPanel(new GridBagLayout());
        editorPanel = new JPanel(new GridBagLayout());

        buildLayout();
    }

    private void buildLayout() {
        GridBagConstraints gbc = new GridBagConstraints();

        modelPanel.setBorder(BorderFactory.createTitledBorder("Models"));
        editorPanel.setBorder(BorderFactory.createTitledBorder("Editors"));

        gbc.gridx = 0;
        gbc.fill = GridBagConstraints.BOTH;

        modelPanel.add(new JLabel("test label"), gbc);
        add(modelPanel, gbc);

        gbc.gridx = 1;
        add(editorPanel, gbc);
    }
}

This creates a windows that is my desired size (dynamically proportional to the screen size, not included in above code). The tab panel that is placed in the center is expanded to fill all the space required, which is exactly what I want. But, the panels I add inside the tab panel are only as big as their content. If I add labels or anything, it only grows as big as the components. I want them to always be expanded to fill the tab panel.

Upvotes: 45

Views: 61648

Answers (3)

iriha kutukova
iriha kutukova

Reputation: 1

Set MinimumSize of your container to preferred size you want, then set ContentPane of container with your panel.

    setMinimumSize(new Dimension(width,height));
    setContentPane(new MyPanel());

This code works for all layouts.

Or simply call for your container:

    setContentPane(new MyPanel());

This code works for BorderLayout or Free Design

Upvotes: 0

Michael Borgwardt
Michael Borgwardt

Reputation: 346250

The easiest way is to use a BorderLayout and put the component in the CENTER position.

Upvotes: 65

perp
perp

Reputation: 3963

Try setting the weights of the GridBagConstraints to non-zero values:

gbc.weightx = gbc.weighty = 1.0;

Upvotes: 41

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