/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ---------------------------
* SerialDateChooserPanel.java
* ---------------------------
* (C) Copyright 2001-2005, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: SerialDateChooserPanel.java,v 1.7 2007/11/02 17:50:36 taqua Exp $
*
* Changes
* -------
* 08-Dec-2001 : Version 1 (DG);
* 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
package org.jfree.ui;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;
import java.util.Date;
import java.util.Enumeration;
import java.util.Vector;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import org.jfree.date.SerialDate;
/**
* A panel that allows the user to select a date.
* <P>
* This class is incomplete and untested. You should not use it yet...
*
* @author David Gilbert
*/
public class SerialDateChooserPanel extends JPanel implements ActionListener {
/** The default background color for the selected date. */
public static final Color DEFAULT_DATE_BUTTON_COLOR = Color.red;
/** The default background color for the current month. */
public static final Color DEFAULT_MONTH_BUTTON_COLOR = Color.lightGray;
/** The date selected in the panel. */
private SerialDate date;
/** The color for the selected date. */
private Color dateButtonColor;
/** The color for dates in the current month. */
private Color monthButtonColor;
/** The color for dates that are visible, but not in the current month. */
private Color chosenOtherButtonColor = Color.darkGray;
/** The first day-of-the-week. */
private int firstDayOfWeek = Calendar.SUNDAY;
/** The range used for selecting years. */
private int yearSelectionRange = 20;
/** The font used to display the date. */
private Font dateFont = new Font("SansSerif", Font.PLAIN, 10);
/** A combo for selecting the month. */
private JComboBox monthSelector = null;
/** A combo for selecting the year. */
private JComboBox yearSelector = null;
/** A button for selecting today's date. */
private JButton todayButton = null;
/** An array of buttons used to display the days-of-the-month. */
private JButton[] buttons = null;
/** A flag that indicates whether or not we are currently refreshing the buttons. */
private boolean refreshing = false;
/**
* Constructs a new date chooser panel, using today's date as the initial selection.
*/
public SerialDateChooserPanel() {
this(SerialDate.createInstance(new Date()), false,
DEFAULT_DATE_BUTTON_COLOR,
DEFAULT_MONTH_BUTTON_COLOR);
}
/**
* Constructs a new date chooser panel.
*
* @param date the date.
* @param controlPanel a flag that indicates whether or not the 'today' button should
* appear on the panel.
*/
public SerialDateChooserPanel(final SerialDate date, final boolean controlPanel) {
this(date, controlPanel,
DEFAULT_DATE_BUTTON_COLOR,
DEFAULT_MONTH_BUTTON_COLOR);
}
/**
* Constructs a new date chooser panel.
*
* @param date the date.
* @param controlPanel the control panel.
* @param dateButtonColor the date button color.
* @param monthButtonColor the month button color.
*/
public SerialDateChooserPanel(final SerialDate date, final boolean controlPanel,
final Color dateButtonColor, final Color monthButtonColor) {
super(new BorderLayout());
this.date = date;
this.dateButtonColor = dateButtonColor;
this.monthButtonColor = monthButtonColor;
add(constructSelectionPanel(), BorderLayout.NORTH);
add(getCalendarPanel(), BorderLayout.CENTER);
if (controlPanel) {
add(constructControlPanel(), BorderLayout.SOUTH);
}
}
/**
* Sets the date chosen in the panel.
*
* @param date the new date.
*/
public void setDate(final SerialDate date) {
this.date = date;
this.monthSelector.setSelectedIndex(date.getMonth() - 1);
refreshYearSelector();
refreshButtons();
}
/**
* Returns the date selected in the panel.
*
* @return the selected date.
*/
public SerialDate getDate() {
return this.date;
}
/**
* Handles action-events from the date panel.
*
* @param e information about the event that occurred.
*/
public void actionPerformed(final ActionEvent e) {
if (e.getActionCommand().equals("monthSelectionChanged")) {
final JComboBox c = (JComboBox) e.getSource();
this.date = SerialDate.createInstance(
this.date.getDayOfMonth(), c.getSelectedIndex() + 1, this.date.getYYYY()
);
refreshButtons();
}
else if (e.getActionCommand().equals("yearSelectionChanged")) {
if (!this.refreshing) {
final JComboBox c = (JComboBox) e.getSource();
final Integer y = (Integer) c.getSelectedItem();
this.date = SerialDate.createInstance(
this.date.getDayOfMonth(), this.date.getMonth(), y.intValue()
);
refreshYearSelector();
refreshButtons();
}
}
else if (e.getActionCommand().equals("todayButtonClicked")) {
setDate(SerialDate.createInstance(new Date()));
}
else if (e.getActionCommand().equals("dateButtonClicked")) {
final JButton b = (JButton) e.getSource();
final int i = Integer.parseInt(b.getName());
final SerialDate first = getFirstVisibleDate();
final SerialDate selected = SerialDate.addDays(i, first);
setDate(selected);
}
}
/**
* Returns a panel of buttons, each button representing a day in the month. This is a
* sub-component of the DatePanel.
*
* @return the panel.
*/
private JPanel getCalendarPanel() {
final JPanel panel = new JPanel(new GridLayout(7, 7));
panel.add(new JLabel("Sun", SwingConstants.CENTER));
panel.add(new JLabel("Mon", SwingConstants.CENTER));
panel.add(new JLabel("Tue", SwingConstants.CENTER));
panel.add(new JLabel("Wed", SwingConstants.CENTER));
panel.add(new JLabel("Thu", SwingConstants.CENTER));
panel.add(new JLabel("Fri", SwingConstants.CENTER));
panel.add(new JLabel("Sat", SwingConstants.CENTER));
this.buttons = new JButton[42];
for (int i = 0; i < 42; i++) {
final JButton button = new JButton("");
button.setMargin(new Insets(1, 1, 1, 1));
button.setName(Integer.toString(i));
button.setFont(this.dateFont);
button.setFocusPainted(false);
button.setActionCommand("dateButtonClicked");
button.addActionListener(this);
this.buttons[i] = button;
panel.add(button);
}
return panel;
}
/**
* Returns the button color according to the specified date.
*
* @param targetDate the target date.
*
* @return the button color.
*/
protected Color getButtonColor(final SerialDate targetDate) {
if (this.date.equals(this.date)) {
return this.dateButtonColor;
}
else if (targetDate.getMonth() == this.date.getMonth()) {
return this.monthButtonColor;
}
else {
return this.chosenOtherButtonColor;
}
}
/**
* Returns the first date that is visible in the grid. This should always be in the month
* preceding the month of the selected date.
*
* @return the first visible date.
*/
protected SerialDate getFirstVisibleDate() {
SerialDate result = SerialDate.createInstance(1, this.date.getMonth(), this.date.getYYYY());
result = SerialDate.addDays(-1, result);
while (result.getDayOfWeek() != getFirstDayOfWeek()) {
result = SerialDate.addDays(-1, result);
}
return result;
}
/**
* Returns the first day of the week (controls the labels in the date panel).
*
* @return the first day of the week.
*/
private int getFirstDayOfWeek() {
return this.firstDayOfWeek;
}
/**
* Update the button labels and colors to reflect date selection.
*/
protected void refreshButtons() {
SerialDate current = getFirstVisibleDate();
for (int i = 0; i < 42; i++) {
final JButton button = this.buttons[i];
button.setText(String.valueOf(current.getDayOfWeek()));
button.setBackground(getButtonColor(current));
current = SerialDate.addDays(1, current);
}
}
/**
* Changes the contents of the year selection JComboBox to reflect the chosen date and the year
* range.
*/
private void refreshYearSelector() {
if (!this.refreshing) {
this.refreshing = true;
this.yearSelector.removeAllItems();
final Vector v = getYears(this.date.getYYYY());
for (Enumeration e = v.elements(); e.hasMoreElements();) {
this.yearSelector.addItem(e.nextElement());
}
this.yearSelector.setSelectedItem(new Integer(this.date.getYYYY()));
this.refreshing = false;
}
}
/**
* Returns a vector of years preceding and following the specified year. The number of years
* preceding and following is determined by the yearSelectionRange attribute.
*
* @param chosenYear the current year.
*
* @return a vector of years.
*/
private Vector getYears(final int chosenYear) {
final Vector v = new Vector();
for (int i = chosenYear - this.yearSelectionRange;
i <= chosenYear + this.yearSelectionRange; i++) {
v.addElement(new Integer(i));
}
return v;
}
/**
* Constructs a panel containing two JComboBoxes (for the month and year) and a button
* (to reset the date to TODAY).
*
* @return the panel.
*/
private JPanel constructSelectionPanel() {
final JPanel p = new JPanel();
this.monthSelector = new JComboBox(SerialDate.getMonths());
this.monthSelector.addActionListener(this);
this.monthSelector.setActionCommand("monthSelectionChanged");
p.add(this.monthSelector);
this.yearSelector = new JComboBox(getYears(0));
this.yearSelector.addActionListener(this);
this.yearSelector.setActionCommand("yearSelectionChanged");
p.add(this.yearSelector);
return p;
}
/**
* Returns a panel that appears at the bottom of the calendar panel - contains a button for
* selecting today's date.
*
* @return the panel.
*/
private JPanel constructControlPanel() {
final JPanel p = new JPanel();
p.setBorder(BorderFactory.createEmptyBorder(2, 5, 2, 5));
this.todayButton = new JButton("Today");
this.todayButton.addActionListener(this);
this.todayButton.setActionCommand("todayButtonClicked");
p.add(this.todayButton);
return p;
}
}