日历1-DatePanel
/**
* <p>Copyright: Copyright (c) 2002-2004</p>
* <p>Company: JavaResearch(http://www.javaresearch.org)</p>
* <p>最后更新日期:2003年4月25日
* @author Zhouzhq
*/
package org.jr.swing;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* 日期操作面板，以Windows的通用方式选择和设置日期。
* @since 0.6
*/
public final class DatePanel
extends JPanel {
private static ResourceBundle stringResource = ResourceBundle.getBundle(
"org.jr.resources.DatePanelResource");
private Calendar date = Calendar.getInstance();
;
private int returnValue;
private JLabel selectedDay; //the selected index of days---------------------
//|
private JComboBox month = new JComboBox(); //|
private JSpinner year = new JSpinner(new SpinnerNumberModel(1, 1, 9999, 1)); //|
private JButton up; //|
private JButton down; //|
private JLabel[] days = new JLabel[42]; //<----------------------------------
private JButton ok = new JButton("OK");
private JButton cancel = new JButton("Cancel");
private JPanel panel;
/**
* 构造方法，生成面板。
* @param okListener OK按钮的ActionListener（不可为空）
* @param cancelListener Cancel按钮的ActionListener
*/
public DatePanel(ActionListener okListener, ActionListener cancelListener) {
JSpinner.NumberEditor yearEditor = new JSpinner.NumberEditor(year, "###0");
year.setEditor(yearEditor);
JPanel contentPanel = new JPanel();
contentPanel.setLayout(new BorderLayout());
panel = new JPanel(new BorderLayout());
panel.setBorder(BorderFactory.createTitledBorder(BorderFactory.
createEtchedBorder(),
stringResource.getString("date")));
JPanel pn = new JPanel(new GridBagLayout()) {
public Insets getInsets() {
return new Insets(0, 0, 3, 0);
}
};
GridBagConstraints gc = new GridBagConstraints();
initMonth();
gc.gridx = 0;
gc.gridy = 0;
gc.gridwidth = 1;
gc.gridheight = 1;
pn.add(month, gc);
gc.gridx = 1;
pn.add(Box.createRigidArea(new Dimension(5, 1)), gc);
initYear();
gc.gridx = 2;
gc.weightx = 10;
gc.fill = GridBagConstraints.HORIZONTAL;
pn.add(year, gc);
addDays(); //处历院责显示日期的\uFFFD?
panel.add(pn, BorderLayout.NORTH);
MyListener myListener = new MyListener();
JPanel ps = new JPanel(new FlowLayout(FlowLayout.RIGHT));
ok.setMargin(new Insets(0, 6, 0, 6));
ps.add(ok);
cancel.setMargin(new Insets(0, 6, 0, 6));
ps.add(cancel);
ok.addMouseListener(myListener);
contentPanel.add(ps, BorderLayout.SOUTH);
contentPanel.add(panel, BorderLayout.CENTER);
Dimension d = getSize();
setSize(d.width + 10, d.height);
initDateDialog();
if (okListener == null) {
throw new NullPointerException();
}
ok.addActionListener(okListener);
cancel.addActionListener(cancelListener);
add(contentPanel);
}
private void initYear() {
year.setBorder(new EtchedBorder());
year.addChangeListener(new YearListener());
year.setPreferredSize(new Dimension(85, 22));
year.setMaximumSize(new Dimension(85, 22));
year.setMinimumSize(new Dimension(85, 22));
}
private void initMonth() {
month.addItem(stringResource.getString("jan"));
month.addItem(stringResource.getString("feb"));
month.addItem(stringResource.getString("mar"));
month.addItem(stringResource.getString("apr"));
month.addItem(stringResource.getString("may"));
month.addItem(stringResource.getString("jun"));
month.addItem(stringResource.getString("jul"));
month.addItem(stringResource.getString("aug"));
month.addItem(stringResource.getString("sep"));
month.addItem(stringResource.getString("oct"));
month.addItem(stringResource.getString("nov"));
month.addItem(stringResource.getString("dec"));
month.setPreferredSize(new Dimension(90, 22));
month.setMaximumSize(new Dimension(90, 22));
month.setMinimumSize(new Dimension(90, 22));
month.addActionListener(new MonthListener());
}
private void addDays() {
DayListener dayListener = new DayListener();
for (int i = 0; i < 42; i++) {
days[i] = new JLabel(" ");
days[i].setMaximumSize(new Dimension(15, 15));
days[i].setPreferredSize(new Dimension(15, 15));
days[i].setBackground(new Color(0, 0, 125));
days[i].addMouseListener(dayListener);
}
JPanel dayPanel = new JPanel(new BorderLayout());
dayPanel.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
JPanel dayPn = new JPanel(new GridLayout(1, 7, 5, 5));
dayPn.setBackground(new Color(140, 140, 140));
dayPn.add(new JLabel(stringResource.getString("sun"))).setForeground(new
Color(222, 222, 222));
dayPn.add(new JLabel(stringResource.getString("mon"))).setForeground(new
Color(222, 222, 222));
dayPn.add(new JLabel(stringResource.getString("tue"))).setForeground(new
Color(222, 222, 222));
dayPn.add(new JLabel(stringResource.getString("wed"))).setForeground(new
Color(222, 222, 222));
dayPn.add(new JLabel(stringResource.getString("thu"))).setForeground(new
Color(222, 222, 222));
dayPn.add(new JLabel(stringResource.getString("fri"))).setForeground(new
Color(222, 222, 222));
dayPn.add(new JLabel(stringResource.getString("sat"))).setForeground(new
Color(222, 222, 222));
dayPanel.add(dayPn, BorderLayout.NORTH);
JPanel dayPc = new JPanel(new GridLayout(6, 7, 5, 5));
dayPc.setBackground(new Color(255, 255, 255));
for (int i = 0; i < 42; i++) {
dayPc.add(days[i]);
}
dayPanel.add(dayPc, BorderLayout.CENTER);
panel.add(dayPanel, BorderLayout.CENTER);
}
private int daysOfMonth(int year, int month) {
//得出year年month月共有多少?
int dayCount = 0; //days of the month
switch (month) {
case 0:
case 2:
case 4:
case 6:
case 7:
case 9:
case 11:
//1,3,5,7,8,10,12月
dayCount = 31;
break;
case 3:
case 5:
case 8:
case 10:
//4,6,9月
dayCount = 30;
break;
case 1: //February
Calendar c1 = Calendar.getInstance();
c1.set(year, 1, 28); //2.28
int week1 = c1.get(Calendar.DAY_OF_WEEK);
Calendar c2 = Calendar.getInstance();
c2.set(year, 2, 1); //3.1
int week2 = c2.get(Calendar.DAY_OF_WEEK);
if ( (week2 - week1) == 1 || (week2 - week1) == -6) { //interval one day
dayCount = 28;
}
else {
dayCount = 29;
}
break;
}
return dayCount;
}
private void initDateDialog() {
processDays(date);
int y = date.get(Calendar.YEAR); //?
int m = date.get(Calendar.MONTH); //月
year.setValue(new Integer(y));
month.setSelectedIndex(m);
}
private void processDays(Calendar date) {
int y = date.get(Calendar.YEAR); //?
int m = date.get(Calendar.MONTH); //月
int d = date.get(Calendar.DAY_OF_MONTH); //日
int dayCount = daysOfMonth(y, m);
for (int i = 0; i < 42; i++) { //clear days[]
days[i].setText(" ");
}
Calendar c = Calendar.getInstance();
c.set(y, m, 1);
int week = c.get(Calendar.DAY_OF_WEEK); //得出该月一号是星期几 *星期日~~~星期六值为：1~~7
for (int i = week - 1, day = 1; day <= dayCount; day++) {
String s = "" + day;
if (s.length() == 1) {
s = " " + s;
}
days[i++].setText(s);
}
if (selectedDay != null) {
selectedDay.setOpaque(false); //通?朔椒ㄊ筨ackground可?
selectedDay.setForeground(new Color(0, 0, 0));
}
selectedDay = days[d + week - 2]; //d+week-2是当前日期在days?榈奈恢?
selectedDay.setOpaque(true); //通?朔椒ㄊ筨ackground可?
selectedDay.setForeground(new Color(255, 255, 255));
}
/**
* 获得用户指定的Date的对象。
* @return Date对象
* @since 0.1
*/
public Date getDate() {
return date.getTime();
}
/**
* 获得用户指定的Calendar的克隆对象。
* @return Calendar对象
* @since 0.1
*/
public Calendar getCalendar() {
return (Calendar) date.clone();
}
//====== inner class MyActionListener =====
/**
* 内部类，负责在okListener前正确的得到用户选择的日期。
*/
private class MyListener
extends MouseAdapter {
public void mousePressed(MouseEvent e) {
if (e.getSource() == ok) {
Calendar c = Calendar.getInstance();
int y = ( (Integer) year.getValue()).intValue();
int m = month.getSelectedIndex();
int d = Integer.parseInt(selectedDay.getText().trim());
c.set(y, m, d);
date = c;
}
}
}
/**
* 内部类，负责在日期面板的‘天’的处理。
*/
private class DayListener
extends MouseAdapter {
public void mousePressed(MouseEvent e) {
JLabel label = (JLabel) e.getSource();
if (label.getText().trim().length() != 0) {
selectedDay.setForeground(new Color(0, 0, 0));
selectedDay.setOpaque(false);
selectedDay = label;
selectedDay.setForeground(new Color(255, 255, 255));
selectedDay.setOpaque(true);
}
}
}
/**
* 内部类，负责在日期面板的‘月’的处理。
*/
private class MonthListener
implements ActionListener {
public void actionPerformed(ActionEvent e) {
Calendar c = Calendar.getInstance();
int y = ( (Integer) year.getValue()).intValue();
int m = month.getSelectedIndex();
int dayCount = daysOfMonth(y, m);
int d = Integer.parseInt(selectedDay.getText().trim());
if (d > dayCount) {
d = dayCount;
}
c.set(y, m, d);
processDays(c);
}
}
/**
* 内部类，负责在日期面板的‘年’的处理。
*/
private class YearListener
implements ChangeListener {
public void stateChanged(ChangeEvent e) {
Calendar c = Calendar.getInstance();
int y = ( (Integer) year.getValue()).intValue();
int m = month.getSelectedIndex();
int dayCount = daysOfMonth(y, m);
int d = Integer.parseInt(selectedDay.getText().trim());
if (d > dayCount) {
d = dayCount;
}
c.set(y, m, d);
processDays(c);
}
}
}
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