Java tutorial
/* Swing, Second Edition by Matthew Robinson, Pavel Vorobiev */ import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.text.DateFormat; import java.text.FieldPosition; import java.util.ArrayList; import java.util.Calendar; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.Iterator; import java.util.NoSuchElementException; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.KeyStroke; import javax.swing.SwingConstants; import javax.swing.border.EmptyBorder; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; import javax.swing.plaf.basic.BasicArrowButton; import javax.swing.text.AttributeSet; import javax.swing.text.BadLocationException; import javax.swing.text.Caret; import javax.swing.text.DefaultEditorKit; import javax.swing.text.JTextComponent; import javax.swing.text.Keymap; import javax.swing.text.PlainDocument; import javax.swing.text.TextAction; public class DateTimeEditor extends JPanel { public static final long ONE_SECOND = 1000; public static final long ONE_MINUTE = 60 * ONE_SECOND; public static final long ONE_HOUR = 60 * ONE_MINUTE; public static final long ONE_DAY = 24 * ONE_HOUR; public static final long ONE_WEEK = 7 * ONE_DAY; public final static int TIME = 0; public final static int DATE = 1; public final static int DATETIME = 2; private int m_timeOrDateType; private int m_lengthStyle; private DateFormat m_format; private Calendar m_calendar = Calendar.getInstance(); private ArrayList m_fieldPositions = new ArrayList(); private Date m_lastDate = new Date(); private Caret m_caret; private int m_curField = -1; private JTextField m_textField; private Spinner m_spinner; private AbstractAction m_upAction = new UpDownAction(1, "up"); private AbstractAction m_downAction = new UpDownAction(-1, "down"); private boolean m_settingDateText = false; // BUG FIX private int[] m_fieldTypes = { DateFormat.ERA_FIELD, DateFormat.YEAR_FIELD, DateFormat.MONTH_FIELD, DateFormat.DATE_FIELD, DateFormat.HOUR_OF_DAY1_FIELD, DateFormat.HOUR_OF_DAY0_FIELD, DateFormat.MINUTE_FIELD, DateFormat.SECOND_FIELD, DateFormat.MILLISECOND_FIELD, DateFormat.DAY_OF_WEEK_FIELD, DateFormat.DAY_OF_YEAR_FIELD, DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD, DateFormat.WEEK_OF_YEAR_FIELD, DateFormat.WEEK_OF_MONTH_FIELD, DateFormat.AM_PM_FIELD, DateFormat.HOUR1_FIELD, DateFormat.HOUR0_FIELD }; public DateTimeEditor() { m_timeOrDateType = DATETIME; m_lengthStyle = DateFormat.SHORT; init(); } public DateTimeEditor(int timeOrDateType) { m_timeOrDateType = timeOrDateType; m_lengthStyle = DateFormat.FULL; init(); } public DateTimeEditor(int timeOrDateType, int lengthStyle) { m_timeOrDateType = timeOrDateType; m_lengthStyle = lengthStyle; init(); } private void init() { setLayout(new BorderLayout()); m_textField = new JTextField(); m_textField.setDocument(new DateTimeDocument()); // BUG FIX m_spinner = new Spinner(); m_spinner.getIncrementButton().addActionListener(m_upAction); m_spinner.getDecrementButton().addActionListener(m_downAction); add(m_textField, "Center"); add(m_spinner, "East"); m_caret = m_textField.getCaret(); m_caret.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent evt) { setCurField(); } }); setupKeymap(); reinit(); } protected class DateTimeDocument extends PlainDocument { public void insertString(int offset, String str, AttributeSet a) throws BadLocationException { if (m_settingDateText) super.insertString(offset, str, a); } } // BUG FIX public int getTimeOrDateType() { return m_timeOrDateType; } public void setTimeOrDateType(int timeOrDateType) { m_timeOrDateType = timeOrDateType; reinit(); } public int getLengthStyle() { return m_lengthStyle; } public void setLengthStyle(int lengthStyle) { m_lengthStyle = lengthStyle; reinit(); } public Date getDate() { return (m_lastDate); } // public void setDate(Date date) // { // m_lastDate = date; // m_calendar.setTime(m_lastDate); // m_textField.setText(m_format.format(m_lastDate)); // getFieldPositions(); // } public void setDate(Date date) { m_lastDate = date; m_calendar.setTime(m_lastDate); m_settingDateText = true; m_textField.setText(m_format.format(m_lastDate)); m_settingDateText = false; getFieldPositions(); } // BUG FIX private int getFieldBeginIndex(int fieldNum) { int beginIndex = -1; for (Iterator iter = m_fieldPositions.iterator(); iter.hasNext();) { FieldPosition fieldPos = (FieldPosition) iter.next(); if (fieldPos.getField() == fieldNum) { beginIndex = fieldPos.getBeginIndex(); break; } } return (beginIndex); } private FieldPosition getFieldPosition(int fieldNum) { FieldPosition result = null; for (Iterator iter = m_fieldPositions.iterator(); iter.hasNext();) { FieldPosition fieldPosition = (FieldPosition) iter.next(); if (fieldPosition.getField() == fieldNum) { result = fieldPosition; break; } } return (result); } private void reinit() { setupFormat(); setDate(m_lastDate); m_caret.setDot(0); setCurField(); repaint(); } protected void setupFormat() { switch (m_timeOrDateType) { case TIME: m_format = DateFormat.getTimeInstance(m_lengthStyle); break; case DATE: m_format = DateFormat.getDateInstance(m_lengthStyle); break; case DATETIME: m_format = DateFormat.getDateTimeInstance(m_lengthStyle, m_lengthStyle); break; } } protected class UpDownAction extends AbstractAction { int m_direction; // +1 = up; -1 = down public UpDownAction(int direction, String name) { super(name); m_direction = direction; } public void actionPerformed(ActionEvent evt) { if (!this.isEnabled()) return; boolean dateSet = true; switch (m_curField) { case DateFormat.AM_PM_FIELD: m_lastDate.setTime(m_lastDate.getTime() + (m_direction * 12 * ONE_HOUR)); break; case DateFormat.DATE_FIELD: case DateFormat.DAY_OF_WEEK_FIELD: case DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD: case DateFormat.DAY_OF_YEAR_FIELD: m_lastDate.setTime(m_lastDate.getTime() + (m_direction * ONE_DAY)); break; case DateFormat.ERA_FIELD: dateSet = false; break; case DateFormat.HOUR0_FIELD: case DateFormat.HOUR1_FIELD: case DateFormat.HOUR_OF_DAY0_FIELD: case DateFormat.HOUR_OF_DAY1_FIELD: m_lastDate.setTime(m_lastDate.getTime() + (m_direction * ONE_HOUR)); break; case DateFormat.MILLISECOND_FIELD: m_lastDate.setTime(m_lastDate.getTime() + (m_direction * 1)); break; case DateFormat.MINUTE_FIELD: m_lastDate.setTime(m_lastDate.getTime() + (m_direction * ONE_MINUTE)); break; case DateFormat.MONTH_FIELD: m_calendar.set(Calendar.MONTH, m_calendar.get(Calendar.MONTH) + m_direction); m_lastDate = m_calendar.getTime(); break; case DateFormat.SECOND_FIELD: m_lastDate.setTime(m_lastDate.getTime() + (m_direction * ONE_SECOND)); break; case DateFormat.WEEK_OF_MONTH_FIELD: m_calendar.set(Calendar.WEEK_OF_MONTH, m_calendar.get(Calendar.WEEK_OF_MONTH) + m_direction); m_lastDate = m_calendar.getTime(); break; case DateFormat.WEEK_OF_YEAR_FIELD: m_calendar.set(Calendar.WEEK_OF_MONTH, m_calendar.get(Calendar.WEEK_OF_MONTH) + m_direction); m_lastDate = m_calendar.getTime(); break; case DateFormat.YEAR_FIELD: m_calendar.set(Calendar.YEAR, m_calendar.get(Calendar.YEAR) + m_direction); m_lastDate = m_calendar.getTime(); break; default: dateSet = false; } if (dateSet) { int fieldId = m_curField; setDate(m_lastDate); FieldPosition fieldPosition = getFieldPosition(fieldId); m_caret.setDot(fieldPosition.getBeginIndex()); m_textField.requestFocus(); repaint(); } } } protected class BackwardAction extends TextAction { BackwardAction(String name) { super(name); } public void actionPerformed(ActionEvent e) { JTextComponent target = getTextComponent(e); if (target != null) { int dot = target.getCaretPosition(); if (dot > 0) { FieldPosition position = getPrevField(dot); if (position != null) target.setCaretPosition(position.getBeginIndex()); else { position = getFirstField(); if (position != null) target.setCaretPosition(position.getBeginIndex()); } } else target.getToolkit().beep(); target.getCaret().setMagicCaretPosition(null); } } } protected class ForwardAction extends TextAction { ForwardAction(String name) { super(name); } public void actionPerformed(ActionEvent e) { JTextComponent target = getTextComponent(e); if (target != null) { FieldPosition position = getNextField(target.getCaretPosition()); if (position != null) target.setCaretPosition(position.getBeginIndex()); else { position = getLastField(); if (position != null) target.setCaretPosition(position.getBeginIndex()); } target.getCaret().setMagicCaretPosition(null); } } } protected class BeginAction extends TextAction { BeginAction(String name) { super(name); } public void actionPerformed(ActionEvent e) { JTextComponent target = getTextComponent(e); if (target != null) { FieldPosition position = getFirstField(); if (position != null) target.setCaretPosition(position.getBeginIndex()); } } } protected class EndAction extends TextAction { EndAction(String name) { super(name); } public void actionPerformed(ActionEvent e) { JTextComponent target = getTextComponent(e); if (target != null) { FieldPosition position = getLastField(); if (position != null) target.setCaretPosition(position.getBeginIndex()); } } } protected void setupKeymap() { Keymap keymap = m_textField.addKeymap("DateTimeKeymap", null); keymap.addActionForKeyStroke(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0), m_upAction); keymap.addActionForKeyStroke(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), m_downAction); keymap.addActionForKeyStroke(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), new BackwardAction(DefaultEditorKit.backwardAction)); keymap.addActionForKeyStroke(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), new ForwardAction(DefaultEditorKit.forwardAction)); keymap.addActionForKeyStroke(KeyStroke.getKeyStroke(KeyEvent.VK_HOME, 0), new BeginAction(DefaultEditorKit.beginAction)); keymap.addActionForKeyStroke(KeyStroke.getKeyStroke(KeyEvent.VK_END, 0), new EndAction(DefaultEditorKit.endAction)); m_textField.setKeymap(keymap); } private void getFieldPositions() { m_fieldPositions.clear(); for (int ctr = 0; ctr < m_fieldTypes.length; ++ctr) { int fieldId = m_fieldTypes[ctr]; FieldPosition fieldPosition = new FieldPosition(fieldId); StringBuffer formattedField = new StringBuffer(); m_format.format(m_lastDate, formattedField, fieldPosition); if (fieldPosition.getEndIndex() > 0) m_fieldPositions.add(fieldPosition); } m_fieldPositions.trimToSize(); Collections.sort(m_fieldPositions, new Comparator() { public int compare(Object o1, Object o2) { return (((FieldPosition) o1).getBeginIndex() - ((FieldPosition) o2).getBeginIndex()); } }); } private FieldPosition getField(int caretLoc) { FieldPosition fieldPosition = null; for (Iterator iter = m_fieldPositions.iterator(); iter.hasNext();) { FieldPosition chkFieldPosition = (FieldPosition) iter.next(); if ((chkFieldPosition.getBeginIndex() <= caretLoc) && (chkFieldPosition.getEndIndex() > caretLoc)) { fieldPosition = chkFieldPosition; break; } } return (fieldPosition); } private FieldPosition getPrevField(int caretLoc) { FieldPosition fieldPosition = null; for (int ctr = m_fieldPositions.size() - 1; ctr > -1; --ctr) { FieldPosition chkFieldPosition = (FieldPosition) m_fieldPositions.get(ctr); if (chkFieldPosition.getEndIndex() <= caretLoc) { fieldPosition = chkFieldPosition; break; } } return (fieldPosition); } private FieldPosition getNextField(int caretLoc) { FieldPosition fieldPosition = null; for (Iterator iter = m_fieldPositions.iterator(); iter.hasNext();) { FieldPosition chkFieldPosition = (FieldPosition) iter.next(); if (chkFieldPosition.getBeginIndex() > caretLoc) { fieldPosition = chkFieldPosition; break; } } return (fieldPosition); } private FieldPosition getFirstField() { FieldPosition result = null; try { result = ((FieldPosition) m_fieldPositions.get(0)); } catch (NoSuchElementException ex) { } return (result); } private FieldPosition getLastField() { FieldPosition result = null; try { result = ((FieldPosition) m_fieldPositions.get(m_fieldPositions.size() - 1)); } catch (NoSuchElementException ex) { } return (result); } private void setCurField() { FieldPosition fieldPosition = getField(m_caret.getDot()); if (fieldPosition != null) { if (m_caret.getDot() != fieldPosition.getBeginIndex()) m_caret.setDot(fieldPosition.getBeginIndex()); } else { fieldPosition = getPrevField(m_caret.getDot()); if (fieldPosition != null) m_caret.setDot(fieldPosition.getBeginIndex()); else { fieldPosition = getFirstField(); if (fieldPosition != null) m_caret.setDot(fieldPosition.getBeginIndex()); } } if (fieldPosition != null) m_curField = fieldPosition.getField(); else m_curField = -1; } public void setEnabled(boolean enable) { m_textField.setEnabled(enable); m_spinner.setEnabled(enable); } public boolean isEnabled() { return (m_textField.isEnabled() && m_spinner.isEnabled()); } public static void main(String[] args) { JFrame frame = new JFrame(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent evt) { System.exit(0); } }); JPanel panel = new JPanel(new BorderLayout()); panel.setBorder(new EmptyBorder(5, 5, 5, 5)); frame.setContentPane(panel); final DateTimeEditor field = new DateTimeEditor(DateTimeEditor.DATETIME, DateFormat.FULL); panel.add(field, "North"); JPanel buttonBox = new JPanel(new GridLayout(2, 2)); JButton showDateButton = new JButton("Show Date"); buttonBox.add(showDateButton); final JComboBox timeDateChoice = new JComboBox(); timeDateChoice.addItem("Time"); timeDateChoice.addItem("Date"); timeDateChoice.addItem("Date/Time"); timeDateChoice.setSelectedIndex(2); timeDateChoice.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { field.setTimeOrDateType(timeDateChoice.getSelectedIndex()); } }); buttonBox.add(timeDateChoice); JButton toggleButton = new JButton("Toggle Enable"); buttonBox.add(toggleButton); showDateButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { System.out.println(field.getDate()); } }); toggleButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { field.setEnabled(!field.isEnabled()); } }); panel.add(buttonBox, "South"); final JComboBox lengthStyleChoice = new JComboBox(); lengthStyleChoice.addItem("Full"); lengthStyleChoice.addItem("Long"); lengthStyleChoice.addItem("Medium"); lengthStyleChoice.addItem("Short"); lengthStyleChoice.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { field.setLengthStyle(lengthStyleChoice.getSelectedIndex()); } }); buttonBox.add(lengthStyleChoice); frame.pack(); Dimension dim = frame.getToolkit().getScreenSize(); frame.setLocation(dim.width / 2 - frame.getWidth() / 2, dim.height / 2 - frame.getHeight() / 2); frame.show(); } } class Spinner extends JPanel { private int m_orientation = SwingConstants.VERTICAL; private BasicArrowButton m_incrementButton; private BasicArrowButton m_decrementButton; public Spinner() { createComponents(); } public Spinner(int orientation) { m_orientation = orientation; createComponents(); } public void setEnabled(boolean enable) { m_incrementButton.setEnabled(enable); m_decrementButton.setEnabled(enable); } public boolean isEnabled() { return (m_incrementButton.isEnabled() && m_decrementButton.isEnabled()); } protected void createComponents() { if (m_orientation == SwingConstants.VERTICAL) { setLayout(new GridLayout(2, 1)); m_incrementButton = new BasicArrowButton(SwingConstants.NORTH); m_decrementButton = new BasicArrowButton(SwingConstants.SOUTH); add(m_incrementButton); add(m_decrementButton); } else if (m_orientation == SwingConstants.HORIZONTAL) { setLayout(new GridLayout(1, 2)); m_incrementButton = new BasicArrowButton(SwingConstants.EAST); m_decrementButton = new BasicArrowButton(SwingConstants.WEST); add(m_decrementButton); add(m_incrementButton); } } public JButton getIncrementButton() { return (m_incrementButton); } public JButton getDecrementButton() { return (m_decrementButton); } public static void main(String[] args) { JFrame frame = new JFrame(); JPanel panel = (JPanel) frame.getContentPane(); panel.setLayout(new BorderLayout()); JTextField field = new JTextField(20); Spinner spinner = new Spinner(); panel.add(field, "Center"); panel.add(spinner, "East"); Dimension dim = frame.getToolkit().getScreenSize(); frame.setLocation(dim.width / 2 - frame.getWidth() / 2, dim.height / 2 - frame.getHeight() / 2); frame.pack(); frame.show(); } }