379 lines
11 KiB
Java
379 lines
11 KiB
Java
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Display a Calendar in a JComboBox
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import java.awt.*;
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import java.awt.event.*;
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import java.util.Calendar;
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import java.text.SimpleDateFormat;
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import javax.swing.*;
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import javax.swing.event.PopupMenuListener;
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import javax.swing.event.PopupMenuEvent;
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import javax.swing.plaf.ComboBoxUI;
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import javax.swing.plaf.basic.ComboPopup;
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import javax.swing.plaf.metal.MetalComboBoxUI;
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import javax.swing.border.Border;
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import javax.swing.border.EtchedBorder;
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import javax.swing.border.EmptyBorder;
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import com.sun.java.swing.plaf.motif.MotifComboBoxUI;
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import com.sun.java.swing.plaf.windows.WindowsComboBoxUI;
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public class DateComboBox extends JComboBox {
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protected SimpleDateFormat dateFormat = new SimpleDateFormat("MMM d, yyyy");
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public void setDateFormat(SimpleDateFormat dateFormat) {
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this.dateFormat = dateFormat;
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}
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public void setSelectedItem(Object item) {
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// Could put extra logic here or in renderer when item is instanceof Date, Calendar, or String
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// Dont keep a list ... just the currently selected item
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removeAllItems(); // hides the popup if visible
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addItem(item);
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super.setSelectedItem(item);
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}
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public void updateUI() {
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ComboBoxUI cui = (ComboBoxUI) UIManager.getUI(this);
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if (cui instanceof MetalComboBoxUI) {
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cui = new MetalDateComboBoxUI();
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} else if (cui instanceof MotifComboBoxUI) {
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cui = new MotifDateComboBoxUI();
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} else if (cui instanceof WindowsComboBoxUI) {
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cui = new WindowsDateComboBoxUI();
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}
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setUI(cui);
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}
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// Inner classes are used purely to keep DateComboBox component in one file
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//////////////////////////////////////////////////////////////
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// UI Inner classes -- one for each supported Look and Feel
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//////////////////////////////////////////////////////////////
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class MetalDateComboBoxUI extends MetalComboBoxUI {
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protected ComboPopup createPopup() {
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return new DatePopup( comboBox );
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}
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}
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class WindowsDateComboBoxUI extends WindowsComboBoxUI {
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protected ComboPopup createPopup() {
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return new DatePopup( comboBox );
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}
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}
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class MotifDateComboBoxUI extends MotifComboBoxUI {
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protected ComboPopup createPopup() {
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return new DatePopup( comboBox );
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}
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}
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//////////////////////////////////////////////////////////////
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// DatePopup inner class
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//////////////////////////////////////////////////////////////
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class DatePopup implements ComboPopup, MouseMotionListener,
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MouseListener, KeyListener, PopupMenuListener {
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protected JComboBox comboBox;
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protected Calendar calendar;
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protected JPopupMenu popup;
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protected JLabel monthLabel;
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protected JPanel days = null;
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protected SimpleDateFormat monthFormat = new SimpleDateFormat("MMM yyyy");
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protected Color selectedBackground;
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protected Color selectedForeground;
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protected Color background;
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protected Color foreground;
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public DatePopup(JComboBox comboBox) {
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this.comboBox = comboBox;
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calendar = Calendar.getInstance();
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//String[] dts = {dt};
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int yr = calendar.get(Calendar.YEAR);
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int mn = calendar.get(Calendar.MONTH);
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int dts = calendar.get(Calendar.DATE);
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String dt = dts+"/"+mn+"/"+yr;
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comboBox.addItem(dt);
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// check Look and Feel
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background = UIManager.getColor("ComboBox.background");
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foreground = UIManager.getColor("ComboBox.foreground");
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selectedBackground = UIManager.getColor("ComboBox.selectionBackground");
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selectedForeground = UIManager.getColor("ComboBox.selectionForeground");
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initializePopup();
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}
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//========================================
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// begin ComboPopup method implementations
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//
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public void show() {
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try {
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// if setSelectedItem() was called with a valid date, adjust the calendar
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calendar.setTime( dateFormat.parse( comboBox.getSelectedItem().toString() ) );
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} catch (Exception e) {}
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updatePopup();
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popup.show(comboBox, 0, comboBox.getHeight());
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}
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public void hide() {
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popup.setVisible(false);
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}
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protected JList list = new JList();
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public JList getList() {
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return list;
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}
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public MouseListener getMouseListener() {
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return this;
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}
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public MouseMotionListener getMouseMotionListener() {
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return this;
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}
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public KeyListener getKeyListener() {
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return this;
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}
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public boolean isVisible() {
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return popup.isVisible();
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}
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public void uninstallingUI() {
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popup.removePopupMenuListener(this);
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}
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public void mousePressed( MouseEvent e ) {}
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public void mouseReleased( MouseEvent e ) {}
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// something else registered for MousePressed
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public void mouseClicked(MouseEvent e) {
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if ( !SwingUtilities.isLeftMouseButton(e) )
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return;
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if ( !comboBox.isEnabled() )
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return;
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if ( comboBox.isEditable() ) {
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comboBox.getEditor().getEditorComponent().requestFocus();
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} else {
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comboBox.requestFocus();
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}
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togglePopup();
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}
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protected boolean mouseInside = false;
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public void mouseEntered(MouseEvent e) {
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mouseInside = true;
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}
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public void mouseExited(MouseEvent e) {
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mouseInside = false;
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}
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// MouseMotionListener
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public void mouseDragged(MouseEvent e) {}
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public void mouseMoved(MouseEvent e) {}
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// KeyListener
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public void keyPressed(KeyEvent e) {}
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public void keyTyped(KeyEvent e) {}
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public void keyReleased( KeyEvent e ) {
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if ( e.getKeyCode() == KeyEvent.VK_SPACE ||
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e.getKeyCode() == KeyEvent.VK_ENTER ) {
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togglePopup();
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}
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}
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/**
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* Variables hideNext and mouseInside are used to
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* hide the popupMenu by clicking the mouse in the JComboBox
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*/
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public void popupMenuCanceled(PopupMenuEvent e) {}
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protected boolean hideNext = false;
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public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
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hideNext = mouseInside;
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}
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public void popupMenuWillBecomeVisible(PopupMenuEvent e) {}
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protected void togglePopup() {
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if ( isVisible() || hideNext ) {
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hide();
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} else {
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show();
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}
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hideNext = false;
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}
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// Note *** did not use JButton because Popup closes when pressed
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protected JLabel createUpdateButton(final int field, final int amount) {
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final JLabel label = new JLabel();
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final Border selectedBorder = new EtchedBorder();
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final Border unselectedBorder = new EmptyBorder(selectedBorder.getBorderInsets(new JLabel()));
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label.setBorder(unselectedBorder);
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label.setForeground(foreground);
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label.addMouseListener(new MouseAdapter() {
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public void mouseReleased(MouseEvent e) {
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calendar.add(field, amount);
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updatePopup();
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}
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public void mouseEntered(MouseEvent e) {
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label.setBorder(selectedBorder);
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}
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public void mouseExited(MouseEvent e) {
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label.setBorder(unselectedBorder);
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}
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});
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return label;
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}
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protected void initializePopup() {
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JPanel header = new JPanel(); // used Box, but it wasn't Opaque
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header.setLayout(new BoxLayout(header, BoxLayout.X_AXIS));
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header.setBackground(background);
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header.setOpaque(true);
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JLabel label;
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label = createUpdateButton(Calendar.YEAR, -1);
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label.setText("<<");
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label.setToolTipText("Previous Year");
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header.add(Box.createHorizontalStrut(12));
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header.add(label);
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header.add(Box.createHorizontalStrut(12));
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label = createUpdateButton(Calendar.MONTH, -1);
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label.setText("<");
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label.setToolTipText("Previous Month");
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header.add(label);
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monthLabel = new JLabel("", JLabel.CENTER);
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monthLabel.setForeground(foreground);
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header.add(Box.createHorizontalGlue());
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header.add(monthLabel);
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header.add(Box.createHorizontalGlue());
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label = createUpdateButton(Calendar.MONTH, 1);
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label.setText(">");
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label.setToolTipText("Next Month");
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header.add(label);
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label = createUpdateButton(Calendar.YEAR, 1);
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label.setText(">>");
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label.setToolTipText("Next Year");
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header.add(Box.createHorizontalStrut(12));
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header.add(label);
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header.add(Box.createHorizontalStrut(12));
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popup = new JPopupMenu();
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popup.setBorder(BorderFactory.createLineBorder(Color.black));
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popup.setLayout(new BorderLayout());
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popup.setBackground(background);
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popup.addPopupMenuListener(this);
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popup.add(BorderLayout.NORTH, header);
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}
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// update the Popup when either the month or the year of the calendar has been changed
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protected void updatePopup() {
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monthLabel.setText( monthFormat.format(calendar.getTime()) );
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if (days != null) {
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popup.remove(days);
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}
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days = new JPanel(new GridLayout(0, 7));
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days.setBackground(background);
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days.setOpaque(true);
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Calendar setupCalendar = (Calendar) calendar.clone();
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setupCalendar.set(Calendar.DAY_OF_WEEK, setupCalendar.getFirstDayOfWeek());
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for (int i = 0; i < 7; i++) {
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int dayInt = setupCalendar.get(Calendar.DAY_OF_WEEK);
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JLabel label = new JLabel();
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label.setHorizontalAlignment(JLabel.CENTER);
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label.setForeground(foreground);
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if (dayInt == Calendar.SUNDAY) {
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label.setText("Sun");
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} else if (dayInt == Calendar.MONDAY) {
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label.setText("Mon");
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} else if (dayInt == Calendar.TUESDAY) {
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label.setText("Tue");
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} else if (dayInt == Calendar.WEDNESDAY) {
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label.setText("Wed");
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} else if (dayInt == Calendar.THURSDAY) {
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label.setText("Thu");
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} else if (dayInt == Calendar.FRIDAY) {
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label.setText("Fri");
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} else if (dayInt == Calendar.SATURDAY){
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label.setText("Sat");
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}
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days.add(label);
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setupCalendar.roll(Calendar.DAY_OF_WEEK, true);
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}
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setupCalendar = (Calendar) calendar.clone();
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setupCalendar.set(Calendar.DAY_OF_MONTH, 1);
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int first = setupCalendar.get(Calendar.DAY_OF_WEEK);
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for (int i = 0; i < (first - 1); i++) {
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days.add(new JLabel(""));
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}
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for (int i = 1; i <= setupCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) {
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final int day = i;
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final JLabel label = new JLabel(String.valueOf(day));
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label.setHorizontalAlignment(JLabel.CENTER);
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label.setForeground(foreground);
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label.addMouseListener(new MouseListener() {
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public void mousePressed(MouseEvent e) {}
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public void mouseClicked(MouseEvent e) {}
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public void mouseReleased(MouseEvent e) {
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label.setOpaque(false);
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label.setBackground(background);
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label.setForeground(foreground);
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calendar.set(Calendar.DAY_OF_MONTH, day);
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comboBox.setSelectedItem(dateFormat.format(calendar.getTime()));
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hide();
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comboBox.requestFocus();
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}
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public void mouseEntered(MouseEvent e) {
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label.setOpaque(true);
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label.setBackground(selectedBackground);
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label.setForeground(selectedForeground);
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}
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public void mouseExited(MouseEvent e) {
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label.setOpaque(false);
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label.setBackground(background);
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label.setForeground(foreground);
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}
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});
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days.add(label);
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}
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popup.add(BorderLayout.CENTER, days);
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popup.pack();
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}
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}
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public static void main(String args[])
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{
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JFrame f = new JFrame();
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Container c = f.getContentPane();
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c.setLayout(new FlowLayout());
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c.add(new JLabel("Date:"));
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DateComboBox dcb = new DateComboBox();
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c.add(dcb);
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f.addWindowListener(new WindowAdapter()
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{
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public void windowClosing(WindowEvent e)
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{
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System.exit(0);
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}
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});
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f.setSize(200, 100);
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f.show();
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}
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}
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