java类java.awt.event.FocusListener的实例源码

/** Delegates to the original listener.
*/
public void focusLost(FocusEvent ev) {
    FocusListener l = (FocusListener) super.get(ev);

    if (l != null) {
        l.focusLost(ev);
    }
}

public synchronized void addFocusListener(FocusListener l) {
    super.addFocusListener(l);
    if (!localFocusListenerInitialized) {
        localFocusListenerInitialized = true;
        Container container = this;
        FocusListener focusListener = localFocusListener;
        addFocusListenerRecursively(container, focusListener);
    }
}

private void addFocusListenerRecursively(Container container, FocusListener focusListener) {
    final Component[] components = container.getComponents();
    for (int i = 0; i < components.length; i++) {
        Component component = components[i];
        if (component.isFocusable() && !(component instanceof JLabel)) {
            component.addFocusListener(focusListener);
        }
        if (component instanceof Container) {
            if (!(component instanceof SectionNodePanel)) {
                addFocusListenerRecursively((Container) component, focusListener);
            }
        }
    }
}

private JComboBox createComboBox(CandidateDescription[] choices, CandidateDescription defaultValue, Font font, FocusListener listener ) {
    JComboBox combo = new JComboBox(choices);
    combo.setSelectedItem(defaultValue);
    combo.getAccessibleContext().setAccessibleDescription(getBundleString("FixDupImportStmts_Combo_ACSD")); //NOI18N
    combo.getAccessibleContext().setAccessibleName(getBundleString("FixDupImportStmts_Combo_Name_ACSD")); //NOI18N
    combo.setOpaque(false);
    combo.setFont( font );
    combo.addFocusListener( listener );
    combo.setEnabled( choices.length > 1 );
    combo.setRenderer( new DelegatingRenderer(combo.getRenderer()));
    InputMap inputMap = combo.getInputMap( JComboBox.WHEN_FOCUSED );
    inputMap.put( KeyStroke.getKeyStroke( KeyEvent.VK_SPACE, 0), "showPopup" ); //NOI18N
    combo.getActionMap().put( "showPopup", new TogglePopupAction() ); //NOI18N
    return combo;
}

private void initComponentsMore() {
    contentPanel.setLayout(new GridBagLayout());
    contentPanel.setBackground(UIManager.getColor("Table.background")); //NOI18N

    int row = 0;
    combos = new ArrayList<>(items.size());

    Font monoSpaced = new Font("Monospaced", Font.PLAIN, new JLabel().getFont().getSize()); //NOI18N
    FocusListener focusListener = new FocusAdapter() {

        @Override
        public void focusGained(FocusEvent e) {
            Component c = e.getComponent();
            Rectangle r = c.getBounds();
            contentPanel.scrollRectToVisible(r);
        }

    };
    for (int i = 0; i < items.size(); i++) {
        ResolveDeclarationItem item = items.get(i);
        JComboBox jComboBox = createComboBox(item, monoSpaced, focusListener);
        combos.add(jComboBox);

        JLabel lblSimpleName = new JLabel(item.getName());
        lblSimpleName.setOpaque(false);
        lblSimpleName.setFont(monoSpaced);
        lblSimpleName.setLabelFor(jComboBox);

        contentPanel.add(lblSimpleName, new GridBagConstraints(0, row, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(3, 5, 2, 5), 0, 0));
        contentPanel.add(jComboBox, new GridBagConstraints(1, row++, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(3, 5, 2, 5), 0, 0));
    }

    contentPanel.add(new JLabel(), new GridBagConstraints(2, row, 2, 1, 0.0, 1.0, GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));

    Dimension d = contentPanel.getPreferredSize();
    d.height = getRowHeight() * Math.min(combos.size(), 6);

}

/** Delegates to the original listener.
*/
@Override public void focusGained(FocusEvent ev) {
    FocusListener l = (FocusListener) super.get(ev);

    if (l != null) {
        l.focusGained(ev);
    }
}

@Override
public synchronized void addFocusListener(FocusListener l) {
    // workaround for java bug #6433257
    for (Component c : getComponents()) {
        c.addFocusListener(l);
    }
}

/**
 * Maps {@code Component.addFocusListener(FocusListener)} through queue
 */
public void addFocusListener(final FocusListener focusListener) {
    runMapping(new MapVoidAction("addFocusListener") {
        @Override
        public void map() {
            getSource().addFocusListener(focusListener);
        }
    });
}

/**
 * Maps {@code Component.removeFocusListener(FocusListener)} through queue
 */
public void removeFocusListener(final FocusListener focusListener) {
    runMapping(new MapVoidAction("removeFocusListener") {
        @Override
        public void map() {
            getSource().removeFocusListener(focusListener);
        }
    });
}

/**
 * Adds a focus listener on the component and its descendents.
 * 
 * @param c
 *          The component.
 * @param focusListener
 *          Focus Listener.
 */
private void installFocusListener(Component c, FocusListener focusListener) {
    c.addFocusListener(focusListener);

    if (c instanceof Container) {
        Container container = (Container) c;
        int componentCount = container.getComponentCount();
        for (int i = 0; i < componentCount; i++) {
            Component child = container.getComponent(i);
            installFocusListener(child, focusListener);
        }
    }
}