Example usage for javax.swing JPanel isAncestorOf

Introduction

In this page you can find the example usage for javax.swing JPanel isAncestorOf.

Prototype

public boolean isAncestorOf(Component c) 

Source Link

Document

Checks if the component is contained in the component hierarchy of this container.

Usage

From source file:Main.java

public static void main(String[] args) {
    int ROWS = 100;
    JPanel content = new JPanel();
    content.setLayout(new BoxLayout(content, BoxLayout.Y_AXIS));
    content.add(new JLabel("Thanks for helping out. Use tab to move around."));
    for (int i = 0; i < ROWS; i++) {
        JTextField field = new JTextField("" + i);
        field.setName("field#" + i);
        content.add(field);/*from ww  w  .j  a v a2  s . c  o  m*/
    }
    KeyboardFocusManager.getCurrentKeyboardFocusManager().addPropertyChangeListener("focusOwner",
            new PropertyChangeListener() {
                @Override
                public void propertyChange(PropertyChangeEvent evt) {
                    if (!(evt.getNewValue() instanceof JComponent)) {
                        return;
                    }
                    JViewport viewport = (JViewport) content.getParent();
                    JComponent focused = (JComponent) evt.getNewValue();
                    if (content.isAncestorOf(focused)) {
                        Rectangle rect = focused.getBounds();
                        Rectangle r2 = viewport.getVisibleRect();
                        content.scrollRectToVisible(
                                new Rectangle(rect.x, rect.y, (int) r2.getWidth(), (int) r2.getHeight()));
                    }
                }
            });
    JFrame window = new JFrame();
    window.setContentPane(new JScrollPane(content));
    window.setSize(200, 200);
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setVisible(true);
}

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From source file:tvbrowser.ui.mainframe.MainFrame.java

/**
 * Makes the StatusBar visible// www  .j  a v  a 2 s  .c  o m
 *
 * @param visible
 *          true if Statusbar should be visible
 */
public void setShowStatusbar(boolean visible) {
    JPanel contentPane = (JPanel) getContentPane();

    Settings.propIsStatusbarVisible.setBoolean(visible);

    if (visible && !contentPane.isAncestorOf(mStatusBar)) {
        jcontentPane.add(mStatusBar, BorderLayout.SOUTH);
    } else if (contentPane.isAncestorOf(mStatusBar)) {
        jcontentPane.remove(mStatusBar);
    }

    contentPane.invalidate();
    contentPane.repaint();
}

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