Java 类sun.awt.VerticalBagLayout 实例源码

public ListScrollPane(final ListAdapter<E> listAdapter) {
    this.listAdapter = listAdapter;
    this.cache = new ArrayList<>(listAdapter.getSize());

    content = new JPanel();
    content.setLayout(new VerticalBagLayout());

    setLayout(new GridBagLayout());

    final GridBagConstraints c = new GridBagConstraints();
    c.fill = GridBagConstraints.BOTH;
    c.weightx = 1;
    c.weighty = 1;
    final JScrollPane scrollPane = new JScrollPane(content);
    add(scrollPane, c);

    c.fill = GridBagConstraints.HORIZONTAL;
    c.anchor = GridBagConstraints.FIRST_LINE_START;
    c.weightx = 1;
    c.weighty = 1;

    update();
}

/**
 * This method initializes navigationPanel.
 * 
 * @return javax.swing.JPanel.
 */
private JPanel getNavigationPanel() {
    if (navigationPanel == null) {
        navigationPanel = new JPanel(new VerticalBagLayout());
        navigationPanel.add(getPlaceFinder());
        navigationPanel.add(getPlacesToGoPanel());
        JPanel buttons = new JPanel();
        buttons.setBackground(UIManager
                .getColor("TaskPaneGroup.background"));
        final int rows = 3;
        buttons.setLayout(new GridLayout(rows, 2));
        buttons.add(getRouteButton(), null);
        buttons.add(getDownloadButton(), null);
        buttons.add(getCenterOnGPSButton(), null);
        buttons.add(getShowTrailButton(), null);
        buttons.add(getAutoCenterModeButton(), null);
        buttons.add(getAutoRotateModeButton(), null);
        navigationPanel.add(buttons);
        // setup minimum size for correct displaying with selected layout
        int minimumWidth = getPlaceFinder().getPreferredSize().width;
        int minimumHeight = getPlaceFinder().getPreferredSize().height
                + getPlacesToGoPanel().getPreferredSize().height
                + buttons.getPreferredSize().height;
        Dimension dimension = new Dimension(minimumWidth, minimumHeight);
        navigationPanel.setMinimumSize(dimension);
    }
    return navigationPanel;
}

/**
 * Create the graphical-interface.
 */
private void initialize() {
    this.setLayout(new VerticalBagLayout(3));
    this.box = new MapOverBox(BOUNDS.getSize());
    box.setLayout(new BorderLayout());
    JComponent intersection = new Intersection();
    this.myCurrentInstructionLabel.setForeground(Color.WHITE);
    this.myCurrentInstructionLabel.setHorizontalTextPosition(SwingConstants.CENTER);
    box.add(intersection, BorderLayout.NORTH);
    box.add(this.myCurrentInstructionLabel, BorderLayout.CENTER);
    this.add(box);
}