Example usage for javax.swing JComboBox addFocusListener

Introduction

In this page you can find the example usage for javax.swing JComboBox addFocusListener.

Prototype

public synchronized void addFocusListener(FocusListener l) 

Source Link

Document

Adds the specified focus listener to receive focus events from this component when this component gains input focus.

Usage

From source file:Main.java

public Main() {
    JTextField textField = new JTextField("A TextField");
    textField.addFocusListener(this);
    JLabel label = new JLabel("A Label");
    label.addFocusListener(this);
    add(label);/*from   w  ww.ja  va  2 s.  c  om*/

    String comboPrefix = "Item #";
    final int numItems = 15;
    Vector vector = new Vector(numItems);
    for (int i = 0; i < numItems; i++) {
        vector.addElement(comboPrefix + i);
    }
    JComboBox comboBox = new JComboBox(vector);
    comboBox.addFocusListener(this);
    add(comboBox);

    JButton button = new JButton("A Button");
    button.addFocusListener(this);
    add(button);

    JList list = new JList(vector);
    list.setSelectedIndex(1);
    list.addFocusListener(this);
    JScrollPane listScrollPane = new JScrollPane(list);

    listScrollPane.getVerticalScrollBar().setFocusable(false);
    listScrollPane.getHorizontalScrollBar().setFocusable(false);
    add(listScrollPane);

    setPreferredSize(new Dimension(450, 450));
}

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From source file:Main.java

public Main() {
    JTextField textField = new JTextField("A TextField");
    textField.addFocusListener(this);
    JLabel label = new JLabel("A Label");
    label.addFocusListener(this);
    add(label);/*from  w ww. j a v a2s  .  c o m*/

    String comboPrefix = "ComboBox Item #";
    final int numItems = 15;
    Vector vector = new Vector(numItems);
    for (int i = 0; i < numItems; i++) {
        vector.addElement(comboPrefix + i);
    }
    JComboBox comboBox = new JComboBox(vector);
    comboBox.addFocusListener(this);
    add(comboBox);

    JButton button = new JButton("A Button");
    button.addFocusListener(this);
    add(button);

    String listPrefix = "List Item #";
    Vector listVector = new Vector(numItems);
    for (int i = 0; i < numItems; i++) {
        listVector.addElement(listPrefix + i);
    }
    JList list = new JList(listVector);
    list.setSelectedIndex(1);
    list.addFocusListener(this);
    JScrollPane listScrollPane = new JScrollPane(list);

    listScrollPane.getVerticalScrollBar().setFocusable(false);
    listScrollPane.getHorizontalScrollBar().setFocusable(false);
    add(listScrollPane);

    setPreferredSize(new Dimension(450, 450));
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}

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From source file:events.FocusEventDemo.java

public void addComponentsToPane(final Container pane) {
    GridBagLayout gridbag = new GridBagLayout();
    pane.setLayout(gridbag);//  w  ww  .j  av  a  2  s .co  m

    GridBagConstraints c = new GridBagConstraints();

    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 1.0; //Make column as wide as possible.
    JTextField textField = new JTextField("A TextField");
    textField.setMargin(new Insets(0, 2, 0, 2));
    textField.addFocusListener(this);
    gridbag.setConstraints(textField, c);
    add(textField);

    c.weightx = 0.1; //Widen every other column a bit, when possible.
    c.fill = GridBagConstraints.NONE;
    JLabel label = new JLabel("A Label");
    label.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 5));
    label.addFocusListener(this);
    gridbag.setConstraints(label, c);
    add(label);

    String comboPrefix = "ComboBox Item #";
    final int numItems = 15;
    Vector<String> vector = new Vector<String>(numItems);
    for (int i = 0; i < numItems; i++) {
        vector.addElement(comboPrefix + i);
    }
    JComboBox comboBox = new JComboBox(vector);
    comboBox.addFocusListener(this);
    gridbag.setConstraints(comboBox, c);
    add(comboBox);

    c.gridwidth = GridBagConstraints.REMAINDER;
    JButton button = new JButton("A Button");
    button.addFocusListener(this);
    gridbag.setConstraints(button, c);
    add(button);

    c.weightx = 0.0;
    c.weighty = 0.1;
    c.fill = GridBagConstraints.BOTH;
    String listPrefix = "List Item #";
    Vector<String> listVector = new Vector<String>(numItems);
    for (int i = 0; i < numItems; i++) {
        listVector.addElement(listPrefix + i);
    }
    JList list = new JList(listVector);
    list.setSelectedIndex(1); //It's easier to see the focus change
    //if an item is selected.
    list.addFocusListener(this);
    JScrollPane listScrollPane = new JScrollPane(list);

    gridbag.setConstraints(listScrollPane, c);
    add(listScrollPane);

    c.weighty = 1.0; //Make this row as tall as possible.
    c.gridheight = GridBagConstraints.REMAINDER;
    //Set up the area that reports focus-gained and focus-lost events.
    display = new JTextArea();
    display.setEditable(false);
    //The setRequestFocusEnabled method prevents a
    //component from being clickable, but it can still
    //get the focus through the keyboard - this ensures
    //user accessibility.
    display.setRequestFocusEnabled(false);
    display.addFocusListener(this);
    JScrollPane displayScrollPane = new JScrollPane(display);

    gridbag.setConstraints(displayScrollPane, c);
    add(displayScrollPane);
    setPreferredSize(new Dimension(450, 450));
    ((JPanel) pane).setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}

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From source file:FocusEventDemo.java

public void addComponentsToPane(final Container pane) {
    GridBagLayout gridbag = new GridBagLayout();
    pane.setLayout(gridbag);// w  w  w. ja va  2s  .c  o m

    GridBagConstraints c = new GridBagConstraints();

    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 1.0; // Make column as wide as possible.
    JTextField textField = new JTextField("A TextField");
    textField.setMargin(new Insets(0, 2, 0, 2));
    textField.addFocusListener(this);
    gridbag.setConstraints(textField, c);
    add(textField);

    c.weightx = 0.1; // Widen every other column a bit, when possible.
    c.fill = GridBagConstraints.NONE;
    JLabel label = new JLabel("A Label");
    label.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 5));
    label.addFocusListener(this);
    gridbag.setConstraints(label, c);
    add(label);

    String comboPrefix = "ComboBox Item #";
    final int numItems = 15;
    Vector<String> vector = new Vector<String>(numItems);
    for (int i = 0; i < numItems; i++) {
        vector.addElement(comboPrefix + i);
    }
    JComboBox comboBox = new JComboBox(vector);
    comboBox.addFocusListener(this);
    gridbag.setConstraints(comboBox, c);
    add(comboBox);

    c.gridwidth = GridBagConstraints.REMAINDER;
    JButton button = new JButton("A Button");
    button.addFocusListener(this);
    gridbag.setConstraints(button, c);
    add(button);

    c.weightx = 0.0;
    c.weighty = 0.1;
    c.fill = GridBagConstraints.BOTH;
    String listPrefix = "List Item #";
    Vector<String> listVector = new Vector<String>(numItems);
    for (int i = 0; i < numItems; i++) {
        listVector.addElement(listPrefix + i);
    }
    JList list = new JList(listVector);
    list.setSelectedIndex(1); // It's easier to see the focus change
    // if an item is selected.
    list.addFocusListener(this);
    JScrollPane listScrollPane = new JScrollPane(list);

    gridbag.setConstraints(listScrollPane, c);
    add(listScrollPane);

    c.weighty = 1.0; // Make this row as tall as possible.
    c.gridheight = GridBagConstraints.REMAINDER;
    // Set up the area that reports focus-gained and focus-lost events.
    display = new JTextArea();
    display.setEditable(false);
    // The setRequestFocusEnabled method prevents a
    // component from being clickable, but it can still
    // get the focus through the keyboard - this ensures
    // user accessibility.
    display.setRequestFocusEnabled(false);
    display.addFocusListener(this);
    JScrollPane displayScrollPane = new JScrollPane(display);

    gridbag.setConstraints(displayScrollPane, c);
    add(displayScrollPane);
    setPreferredSize(new Dimension(450, 450));
    ((JPanel) pane).setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}

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From source file:FocusEventDemo.java

public FocusEventDemo() {
    super(new GridBagLayout());
    GridBagLayout gridbag = (GridBagLayout) getLayout();
    GridBagConstraints c = new GridBagConstraints();

    c.fill = GridBagConstraints.HORIZONTAL;
    c.weightx = 1.0; //Make column as wide as possible.
    JTextField textField = new JTextField("A TextField");
    textField.setMargin(new Insets(0, 2, 0, 2));
    textField.addFocusListener(this);
    gridbag.setConstraints(textField, c);
    add(textField);/*www. ja va  2 s  .  c  om*/

    c.weightx = 0.1; //Widen every other column a bit, when possible.
    c.fill = GridBagConstraints.NONE;
    JLabel label = new JLabel("A Label");
    label.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 5));
    label.addFocusListener(this);
    gridbag.setConstraints(label, c);
    add(label);

    String comboPrefix = "ComboBox Item #";
    final int numItems = 15;
    Vector vector = new Vector(numItems);
    for (int i = 0; i < numItems; i++) {
        vector.addElement(comboPrefix + i);
    }
    JComboBox comboBox = new JComboBox(vector);
    comboBox.addFocusListener(this);
    gridbag.setConstraints(comboBox, c);
    add(comboBox);

    c.gridwidth = GridBagConstraints.REMAINDER;
    JButton button = new JButton("A Button");
    button.addFocusListener(this);
    gridbag.setConstraints(button, c);
    add(button);

    c.weightx = 0.0;
    c.weighty = 0.1;
    c.fill = GridBagConstraints.BOTH;
    String listPrefix = "List Item #";
    Vector listVector = new Vector(numItems);
    for (int i = 0; i < numItems; i++) {
        listVector.addElement(listPrefix + i);
    }
    JList list = new JList(listVector);
    list.setSelectedIndex(1); //It's easier to see the focus change
    //if an item is selected.
    list.addFocusListener(this);
    JScrollPane listScrollPane = new JScrollPane(list);
    //We want to prevent the list's scroll bars
    //from getting the focus - even with the keyboard.
    //Note that in general we prefer setRequestFocusable
    //over setFocusable for reasons of accessibility,
    //but this is to work around bug #4866958.
    listScrollPane.getVerticalScrollBar().setFocusable(false);
    listScrollPane.getHorizontalScrollBar().setFocusable(false);
    gridbag.setConstraints(listScrollPane, c);
    add(listScrollPane);

    c.weighty = 1.0; //Make this row as tall as possible.
    c.gridheight = GridBagConstraints.REMAINDER;
    //Set up the area that reports focus-gained and focus-lost events.
    display = new JTextArea();
    display.setEditable(false);
    //The method setRequestFocusEnabled prevents a
    //component from being clickable, but it can still
    //get the focus through the keyboard - this ensures
    //user accessibility.
    display.setRequestFocusEnabled(false);
    display.addFocusListener(this);
    JScrollPane displayScrollPane = new JScrollPane(display);

    //Work around for bug #4866958.
    displayScrollPane.getHorizontalScrollBar().setFocusable(false);
    displayScrollPane.getVerticalScrollBar().setFocusable(false);
    gridbag.setConstraints(displayScrollPane, c);
    add(displayScrollPane);

    setPreferredSize(new Dimension(450, 450));
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}

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From source file:com.aw.swing.mvp.binding.component.BndSJTable.java

private JComboBox getJComboBox(ComboBoxModel comboBoxModel) {
    final JComboBox jComboBox = new JComboBox(comboBoxModel);
    jComboBox.addFocusListener(new CellEditableFocusListener());
    jComboBox.setRequestFocusEnabled(true);
    jComboBox.putClientProperty(CellEditorUtils.AW_CELL_EDITOR, Boolean.TRUE);
    jComboBox.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);
    jComboBox.addAncestorListener(new AncestorListener() {
        public void ancestorAdded(AncestorEvent event) {
            jComboBox.requestFocusInWindow();
        }/*from w w  w .j a  v a  2  s . c  om*/

        public void ancestorMoved(AncestorEvent event) {
        }

        public void ancestorRemoved(AncestorEvent event) {
        }
    });
    return jComboBox;
}

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From source file:imageuploader.ImgWindow.java

private void setExplicitSelectionManager(JComboBox comboBox) {

    class ExplicitSelectionManager implements KeyListener, FocusListener {

        private JComboBox src;
        private KeyListener superKeyListener;

        ExplicitSelectionManager(JComboBox src) {
            this.src = src;

            //   we like what the default key listener does, but not the action command
            // it uses for ActionEvents it fires for plain text type-ahead characters
            this.superKeyListener = src.getKeyListeners()[0]; // we only have one
            src.removeKeyListener(superKeyListener); // will be replace right away, below
        }//from www. j a va  2  s. c o m

        @Override
        public void keyTyped(KeyEvent e) {
            // basic combo box has no code in keyTyped
        }

        @Override
        public void keyPressed(KeyEvent e) {

            //   in the default JComboBox implementation, the KeySelectionManager is
            // called from keyPressed. I'm fine with the implementation of
            // the default, but I don't want it firing ActionEvents that will cause
            // model updates
            src.setActionCommand("comboBoxMovement");
            this.superKeyListener.keyPressed(e);
            src.setActionCommand("comboBoxChanged");

            if (e.getKeyCode() == 10) {
                src.setSelectedIndex(src.getSelectedIndex());
            }
        }

        @Override
        public void keyReleased(KeyEvent e) {
            // basic combo box has no code in keyReleased
        }

        @Override
        public void focusGained(FocusEvent e) {
        }

        @Override
        //  this will also give us the event we want, if the user decides to Tab out of
        // the combo box, instead of hitting Enter
        public void focusLost(FocusEvent e) {
            src.setSelectedIndex(src.getSelectedIndex());
        }

    }

    ExplicitSelectionManager newSelectionManager = new ExplicitSelectionManager(comboBox);

    comboBox.addKeyListener(newSelectionManager);
    comboBox.addFocusListener(newSelectionManager);

}

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