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/* This is a modified version of the original DateChooserPanel.java from JFree.
* Changes:
*
The month selection is implemented with buttons instead of the originals JComboBox.
* This allows the component to be used in a popup.
*
The "today button" is now in the month selection panel and hasn't an non localized english label
*
Null dates are now allowed (no date is selected in the panel)
*
*
* 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 3 of the License, or
* (at your option) any later version.
* ========================================================================
* 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.]
*
* ---------------------
* DateChooserPanel.java
* ---------------------
* (C) Copyright 2000-2004, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: DateChooserPanel.java,v 1.11 2007/11/02 17:50:36 taqua Exp $
*
* Changes (from 26-Oct-2001)
* --------------------------
* 26-Oct-2001: Changed package to com.jrefinery.ui.* (DG);
* 08-Dec-2001: Dropped the getMonths() method (DG);
* 13-Oct-2002: Fixed errors reported by Checkstyle (DG);
* 02-Nov-2005: Fixed a bug where the current day-of-the-month is past
* the end of the newly selected month when the month or year
* combo boxes are changed - see bug id 1344319 (DG);
*
*/
package com.fathzer.soft.ajlib.swing.widget.date;
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.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.text.DateFormatSymbols;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import com.fathzer.soft.ajlib.utilities.NullUtils;
/**
* A panel that allows the user to select a date.
* @author David Gilbert (modified by Jean-Marc Astesana)
* License: LGPL v3
*/
public class CalendarWidget extends JPanel /*implements ActionListener*/ {
private static final long serialVersionUID = 1L;
public static final String DATE_PROPERTY = "DATE_PROPERTY";
/**
* The date selected in the panel.
*/
private Calendar chosenDate;
/**
* The color for the selected date.
*/
private Color chosenDateButtonColor;
/**
* The color for dates in the current month.
*/
private Color chosenMonthButtonColor;
/**
* The color for dates that are visible, but not in the current month.
*/
private Color chosenOtherButtonColor;
/**
* The first day-of-the-week.
*/
private int firstDayOfWeek;
/**
* The font used to display the date.
*/
private Float fontRatio = 0.85f;
/**
* An array of buttons used to display the days-of-the-month.
*/
private JButton[] buttons;
/**
* An array of labels used to display day of week names.
*/
private JLabel[] days;
private MonthWidget monthSelector;
/**
* The ordered set of all seven days of a week, beginning with the
* 'firstDayOfWeek'.
*/
private int[] weekDays;
/**
* Constructs a new date chooser panel, using today's date as the initial
* selection.
*/
public CalendarWidget() {
super(new BorderLayout());
//TODO It would be cool to choose colors from the current Look and Feel ... but I didn't succeed in doing that :-(
this.chosenDateButtonColor = Color.red;
this.chosenMonthButtonColor = Color.white;
this.chosenOtherButtonColor = Color.gray;
// the default date is today...
this.chosenDate = Calendar.getInstance(getLocale());
initializeDays();
monthSelector = new MonthWidget();
add(monthSelector, BorderLayout.NORTH);
add(getCalendarPanel(), BorderLayout.CENTER);
monthSelector.addPropertyChangeListener(MonthWidget.DATE_PROPERTY, new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
refreshButtons();
}
});
monthSelector.getNow().addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setDate(new Date());
}
});
refreshButtons();
}
@Override
public void setLocale(Locale l) {
super.setLocale(l);
monthSelector.setLocale(l);
initializeDays();
updateDays();
refreshButtons();
}
private void initializeDays() {
this.firstDayOfWeek = Calendar.getInstance(getLocale()).getFirstDayOfWeek();
this.weekDays = new int[7];
for (int i = 0; i < 7; i++) {
this.weekDays[i] = ((this.firstDayOfWeek + i - 1) % 7) + 1;
}
}
/**
* Sets the date chosen in the panel.
*
* @param theDate
* the new date.
*/
public void setDate(final Date theDate) {
Date old = this.getDate();
if (!NullUtils.areEquals(theDate, old)) {
if (theDate == null) {
this.chosenDate = null;
} else {
if (this.chosenDate == null) {
this.chosenDate = Calendar.getInstance(getLocale());
}
this.chosenDate.setTime(theDate);
this.monthSelector.setMonth(theDate);
}
refreshButtons();
this.firePropertyChange(DATE_PROPERTY, old, theDate);
}
}
/**
* Returns the date selected in the panel.
*
* @return the selected date.
*/
public Date getDate() {
return this.chosenDate == null ? null : this.chosenDate.getTime();
}
/**
* 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 p = new JPanel(new GridLayout(7, 7));
final DateFormatSymbols dateFormatSymbols = new DateFormatSymbols(getLocale());
final String[] weekDays = dateFormatSymbols.getShortWeekdays();
this.days = new JLabel[this.weekDays.length];
for (int i = 0; i < this.weekDays.length; i++) {
this.days[i] = new JLabel(weekDays[this.weekDays[i]], SwingConstants.CENTER);
p.add(this.days[i]);
}
this.buttons = new JButton[42];
ActionListener listener = new ActionListener() {
/**
* Handles action-events from the date panel.
* @param e information about the event that occurred.
*/
public void actionPerformed(final ActionEvent e) {
final JButton b = (JButton) e.getSource();
final int i = Integer.parseInt(b.getName());
final Calendar cal = getFirstVisibleDate();
cal.add(Calendar.DATE, i);
setDate(cal.getTime());
}
};
Font bFont = null;
for (int i = 0; i < 42; i++) {
final JButton b = new JButton("");
if (bFont==null) {
bFont = b.getFont().deriveFont(fontRatio*b.getFont().getSize());
}
b.setMargin(new Insets(1, 1, 1, 1));
b.setName(Integer.toString(i));
b.setFont(bFont);
b.setFocusPainted(false);
b.setActionCommand("dateButtonClicked");
b.addActionListener(listener);
this.buttons[i] = b;
p.add(b);
}
return p;
}
private void updateDays() {
final DateFormatSymbols dateFormatSymbols = new DateFormatSymbols(getLocale());
final String[] weekDaysWordings = dateFormatSymbols.getShortWeekdays();
for (int i = 0; i < days.length; i++) {
days[i].setText(weekDaysWordings[this.weekDays[i]]);
}
}
/**
* Returns true if the two dates are equal (time of day is ignored).
*
* @param c1
* the first date.
* @param c2
* the second date.
* @return boolean.
*/
private boolean equalDates(final Calendar c1, final Calendar c2) {
// Be aware that c1 or c2 can be null
if ((c1 == null) && (c2 == null)) {
return true;
}
if ((c1 == null) || (c2 == null)) {
return false;
}
return (c1.get(Calendar.DATE) == c2.get(Calendar.DATE)) && (c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH))
&& (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR));
}
/**
* 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 date.
*/
private Calendar getFirstVisibleDate() {
final Calendar c = Calendar.getInstance(getLocale());
c.setTime(this.monthSelector.getMonth());
c.add(Calendar.DATE, -1);
while (c.get(Calendar.DAY_OF_WEEK) != getFirstDayOfWeek()) {
c.add(Calendar.DATE, -1);
}
return c;
}
/**
* 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.
*/
private void refreshButtons() {
final Calendar c = getFirstVisibleDate();
final Calendar current = Calendar.getInstance(getLocale());
current.setTime(this.monthSelector.getMonth());
for (int i = 0; i < 42; i++) {
final JButton b = this.buttons[i];
setButtonAppearance(b, c, current);
c.add(Calendar.DATE, 1);
}
}
/** Sets a date button appearance.
* @param button The button to be set up
* @param date The date represented by the button
* @param currentMonth The currently displayed month
*/
private void setButtonAppearance(JButton button, Calendar date, Calendar currentMonth) {
String day = Integer.toString(date.get(Calendar.DATE));
Color color;
if (equalDates(date, this.chosenDate)) {
color = this.chosenDateButtonColor;
} else if ((date.get(Calendar.MONTH) == currentMonth.get(Calendar.MONTH))
&& (date.get(Calendar.YEAR) == currentMonth.get(Calendar.YEAR))) {
color = this.chosenMonthButtonColor;
} else {
color = this.chosenOtherButtonColor;
}
button.setBackground(color);
if (equalDates(date, Calendar.getInstance())) {
day = ""+day+"";
}
button.setText(day);
}
/**
* Returns the color for the currently selected date.
*
* @return a color.
*/
public Color getChosenDateButtonColor() {
return this.chosenDateButtonColor;
}
/**
* Redefines the color for the currently selected date.
*
* @param chosenDateButtonColor
* the new color
*/
public void setChosenDateButtonColor(final Color chosenDateButtonColor) {
if (chosenDateButtonColor == null) {
throw new NullPointerException("UIColor must not be null.");
}
final Color oldValue = this.chosenDateButtonColor;
this.chosenDateButtonColor = chosenDateButtonColor;
refreshButtons();
firePropertyChange("chosenDateButtonColor", oldValue, chosenDateButtonColor);
}
/**
* Returns the color for the buttons representing the current month.
*
* @return the color for the current month.
*/
public Color getChosenMonthButtonColor() {
return this.chosenMonthButtonColor;
}
/**
* Defines the color for the buttons representing the current month.
*
* @param chosenMonthButtonColor
* the color for the current month.
*/
public void setChosenMonthButtonColor(final Color chosenMonthButtonColor) {
if (chosenMonthButtonColor == null) {
throw new NullPointerException("UIColor must not be null.");
}
final Color oldValue = this.chosenMonthButtonColor;
this.chosenMonthButtonColor = chosenMonthButtonColor;
refreshButtons();
firePropertyChange("chosenMonthButtonColor", oldValue, chosenMonthButtonColor);
}
/**
* Returns the color for the buttons representing the other months.
*
* @return a color.
*/
public Color getChosenOtherButtonColor() {
return this.chosenOtherButtonColor;
}
/**
* Redefines the color for the buttons representing the other months.
*
* @param chosenOtherButtonColor
* a color.
*/
public void setChosenOtherButtonColor(final Color chosenOtherButtonColor) {
if (chosenOtherButtonColor == null) {
throw new NullPointerException("UIColor must not be null.");
}
final Color oldValue = this.chosenOtherButtonColor;
this.chosenOtherButtonColor = chosenOtherButtonColor;
refreshButtons();
firePropertyChange("chosenOtherButtonColor", oldValue, chosenOtherButtonColor);
}
}
