jdaychooser.java

一个demo是关于swing

/*
 *  JDayChooser.java  - A bean for choosing a day
 *  Copyright (C) 2004 Kai Toedter
 *  [e-mail]
 *  www.toedter.com
 *
 *  This program 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
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package com.toedter.calendar;

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.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseListener;

import java.text.DateFormatSymbols;

import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;


/**
 * JCalendar is a bean for choosing a day.
 *
 * @author Kai Toedter
 * @version 1.2.1
 */
public class JDayChooser extends JPanel implements ActionListener, KeyListener,
    FocusListener {
    protected JButton[] days;
    protected JButton[] weeks;
    protected JButton selectedDay;
    protected JPanel weekPanel;
    protected JPanel dayPanel;
    protected int day;
    protected Color oldDayBackgroundColor;
    protected Color selectedColor;
    protected Color sundayForeground;
    protected Color weekdayForeground;
    protected Color decorationBackgroundColor;
    protected String[] dayNames;
    protected Calendar calendar;
    protected Calendar today;
    protected Locale locale;
    protected boolean initialized;
    protected boolean weekOfYearVisible;
    protected boolean decorationBackgroundVisible = true;
    protected boolean decorationBordersVisible;
    private boolean alwaysFireDayProperty;

    /**
     * Default JDayChooser constructor.
     */
    public JDayChooser() {
        this(false);
    }

    /**
     * JDayChooser constructor.
     *
     * @param weekOfYearVisible true, if the weeks of a year shall be shown
     */
    public JDayChooser(boolean weekOfYearVisible) {
        setBackground(Color.blue);
        this.weekOfYearVisible = weekOfYearVisible;
        locale = Locale.getDefault();
        days = new JButton[49];
        selectedDay = null;
        calendar = Calendar.getInstance(locale);
        today = (Calendar) calendar.clone();

        setLayout(new BorderLayout());

        dayPanel = new JPanel();
        dayPanel.setLayout(new GridLayout(7, 7));

        sundayForeground = new Color(164, 0, 0);
        weekdayForeground = new Color(0, 90, 164);

        // decorationBackgroundColor = new Color(194, 211, 252);
        // decorationBackgroundColor = new Color(206, 219, 246);
        decorationBackgroundColor = new Color(210, 228, 238);

        for (int y = 0; y < 7; y++) {
            for (int x = 0; x < 7; x++) {
                int index = x + (7 * y);

                if (y == 0) {
                    // Create a button that doesn't react on clicks or focus
                    // changes.
                    // Thanks to Thomas Schaefer for the focus hint :)
                    days[index] = new JButton() {
                                public void addMouseListener(MouseListener l) {
                                }

                                public boolean isFocusable() {
                                    return false;
                                }
                            };

                    days[index].setContentAreaFilled(decorationBackgroundVisible);
                    days[index].setBorderPainted(decorationBordersVisible);
                    days[index].setBackground(decorationBackgroundColor);
                } else {
                    days[index] = new JButton("x");
                    days[index].addActionListener(this);
                    days[index].addKeyListener(this);
                    days[index].addFocusListener(this);
                }

                days[index].setMargin(new Insets(0, 0, 0, 0));
                days[index].setFocusPainted(false);
                dayPanel.add(days[index]);
            }
        }

        weekPanel = new JPanel();
        weekPanel.setLayout(new GridLayout(7, 1));
        weeks = new JButton[7];

        for (int i = 0; i < 7; i++) {
            weeks[i] = new JButton() {
                        public void addMouseListener(MouseListener l) {
                        }

                        public boolean isFocusable() {
                            return false;
                        }
                    };
            weeks[i].setMargin(new Insets(0, 0, 0, 0));
            weeks[i].setFocusPainted(false);
            weeks[i].setBackground(decorationBackgroundColor);
            weeks[i].setForeground(new Color(100, 100, 100));

            weeks[i].setContentAreaFilled(decorationBackgroundVisible);
            weeks[i].setBorderPainted(decorationBordersVisible);

            if (i != 0) {
                weeks[i].setText("0" + (i + 1));
            }

            weekPanel.add(weeks[i]);
        }

        init();
        drawWeeks();

        setDay(Calendar.getInstance().get(Calendar.DAY_OF_MONTH));
        add(dayPanel, BorderLayout.CENTER);

        if (weekOfYearVisible) {
            add(weekPanel, BorderLayout.WEST);
        }

        initialized = true;
    }

    /**
     * Initilizes the locale specific names for the days of the week.
     */
    protected void init() {
        JButton testButton = new JButton();
        oldDayBackgroundColor = testButton.getBackground();
        selectedColor = new Color(160, 160, 160);

        Date date = calendar.getTime();
        calendar = Calendar.getInstance(locale);
        calendar.setTime(date);

        drawDayNames();
        drawDays();
    }

    /**
     * Draws the day names of the day columnes.
     */
    private void drawDayNames() {
        int firstDayOfWeek = calendar.getFirstDayOfWeek();
        DateFormatSymbols dateFormatSymbols = new DateFormatSymbols(locale);
        dayNames = dateFormatSymbols.getShortWeekdays();

        int day = firstDayOfWeek;

        for (int i = 0; i < 7; i++) {
            days[i].setText(dayNames[day]);

            if (day == 1) {
                days[i].setForeground(sundayForeground);
            } else {
                days[i].setForeground(weekdayForeground);
            }

            if (day < 7) {
                day++;
            } else {
                day -= 6;
            }
        }
    }

    /**
     * Initializes both day names and weeks of the year.
     */
    protected void initDecorations() {
        for (int x = 0; x < 7; x++) {
            days[x].setContentAreaFilled(decorationBackgroundVisible);
            days[x].setBorderPainted(decorationBordersVisible);
            weeks[x].setContentAreaFilled(decorationBackgroundVisible);
            weeks[x].setBorderPainted(decorationBordersVisible);
        }
    }

    /**
     * Hides and shows the week buttons.
     */
    protected void drawWeeks() {
        Calendar tmpCalendar = (Calendar) calendar.clone();

        for (int i = 1; i < 7; i++) {
            tmpCalendar.set(Calendar.DAY_OF_MONTH, (i * 7) - 6);

            int week = tmpCalendar.get(Calendar.WEEK_OF_YEAR);
            String buttonText = Integer.toString(week);

            if (week < 10) {
                buttonText = "0" + buttonText;
            }

            weeks[i].setText(buttonText);

            if ((i == 5) || (i == 6)) {
                weeks[i].setVisible(days[i * 7].isVisible());
            }
        }
    }

    /**
     * Hides and shows the day buttons.
     */
    protected void drawDays() {
        Calendar tmpCalendar = (Calendar) calendar.clone();
        int firstDayOfWeek = tmpCalendar.getFirstDayOfWeek();
        tmpCalendar.set(Calendar.DAY_OF_MONTH, 1);

        int firstDay = tmpCalendar.get(Calendar.DAY_OF_WEEK) - firstDayOfWeek;

        if (firstDay < 0) {
            firstDay += 7;
        }

        int i;

        for (i = 0; i < firstDay; i++) {
            days[i + 7].setVisible(false);
            days[i + 7].setText("");
        }

        tmpCalendar.add(Calendar.MONTH, 1);

        Date firstDayInNextMonth = tmpCalendar.getTime();
        tmpCalendar.add(Calendar.MONTH, -1);

        Date day = tmpCalendar.getTime();
        int n = 0;
        Color foregroundColor = getForeground();

        while (day.before(firstDayInNextMonth)) {
            days[i + n + 7].setText(Integer.toString(n + 1));
            days[i + n + 7].setVisible(true);

            if ((tmpCalendar.get(Calendar.DAY_OF_YEAR) == today.get(
                        Calendar.DAY_OF_YEAR)) &&
                    (tmpCalendar.get(Calendar.YEAR) == today.get(Calendar.YEAR))) {
                days[i + n + 7].setForeground(sundayForeground);
            } else {
                days[i + n + 7].setForeground(foregroundColor);
            }

            if ((n + 1) == this.day) {
                days[i + n + 7].setBackground(selectedColor);
                selectedDay = days[i + n + 7];
            } else {
                days[i + n + 7].setBackground(oldDayBackgroundColor);
            }

            n++;
            tmpCalendar.add(Calendar.DATE, 1);
            day = tmpCalendar.getTime();
        }

        for (int k = n + i + 7; k < 49; k++) {
            days[k].setVisible(false);
            days[k].setText("");
        }
    }

    /**
     * Returns the locale.
     *
     * @return the locale value
     *
     * @see #setLocale
     */
    public Locale getLocale() {
        return locale;
    }

    /**
     * Sets the locale.
     *
     * @param locale the new locale value
     *
     * @see #getLocale
     */
    public void setLocale(Locale locale) {
        if (!initialized) {
            super.setLocale(locale);
        } else {
            this.locale = locale;
            super.setLocale(locale);
            init();
        }
    }

    /**
     * Sets the day. This is a bound property.
     *
     * @param d the day
     *
     * @see #getDay
     */
    public void setDay(int d) {
        if (d < 1) {
            d = 1;
        }

        Calendar tmpCalendar = (Calendar) calendar.clone();
        tmpCalendar.set(Calendar.DAY_OF_MONTH, 1);
        tmpCalendar.add(Calendar.MONTH, 1);
        tmpCalendar.add(Calendar.DATE, -1);

        int maxDaysInMonth = tmpCalendar.get(Calendar.DATE);

        if (d > maxDaysInMonth) {
            d = maxDaysInMonth;
        }

        int oldDay = day;
        day = d;

        if (selectedDay != null) {
            selectedDay.setBackground(oldDayBackgroundColor);
            selectedDay.repaint();
        }

        for (int i = 7; i < 49; i++) {
            if (days[i].getText().equals(Integer.toString(day))) {
                selectedDay = days[i];
                selectedDay.setBackground(selectedColor);

                break;
            }