testganttrolloverbutton.java

It is all about project scheduling. GanttProject is a tool for creating a project schedule by means

package net.sourceforge.ganttproject.gui;

/**
 * This class is from jedit.org
 * RolloverButton.java - Class for buttons that implement rollovers
 * :tabSize=8:indentSize=8:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * Copyright (C) 2002 Kris Kopicki
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

import java.awt.AlphaComposite;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.SwingConstants;
import javax.swing.border.EtchedBorder;

import net.sourceforge.ganttproject.action.RolloverAction;

/**
 * Special button for tests on TaskPropertiesBeans
 */
public class TestGanttRolloverButton extends JButton {

    protected Icon _iconOn = null;

    protected Icon _iconOff = null;

    private boolean isIconHidden;
    
    private Icon myIcon;
    
    private int myAutoRepeatMilliseconds;

    public TestGanttRolloverButton(Action action) {
        this();
        setAction(action);
        Icon smallIcon = (Icon) action.getValue(Action.SMALL_ICON);
        if (smallIcon != null) {
            setIcon(smallIcon);
            _iconOff = smallIcon;
            myIcon = smallIcon;
        }
        if (action instanceof RolloverAction) {
            _iconOn = ((RolloverAction) action).getIconOnMouseOver();
        }

    }

    public void setAutoRepeatMousePressedEvent(int milliseconds) {
        myAutoRepeatMilliseconds = milliseconds;
    }

    /**
     * Setup the border (invisible initially)
     */
    public TestGanttRolloverButton() {
        setBorder(new EtchedBorder());
        setBorderPainted(false);
        setMargin(new Insets(0, 0, 0, 0));

        setRequestFocusEnabled(false);

        addMouseListener(new MouseOverHandler());
        addMouseListener(new AutoRepeatHandler());
        setHorizontalTextPosition(SwingConstants.CENTER);
        setVerticalTextPosition(SwingConstants.BOTTOM);
    }

    /**
     * Setup the border (invisible initially)
     */
    public TestGanttRolloverButton(Icon icon) {
        this();
        setIcon(icon);
        _iconOn = icon;
        myIcon = icon;
    }

    /**
     * Setup the border (invisible initially)
     */
    private TestGanttRolloverButton(Icon iconOn, Icon iconOff) {
        this();
        setIcon(iconOff);
        _iconOn = iconOn;
        _iconOff = iconOff;
    }

    public void setIconHidden(boolean isHidden) {
        if (isHidden) {
            setDefaultIcon(null);
        }
        else {
            setDefaultIcon(myIcon);
        }
    }
    
    public void setTextHidden(boolean isHidden) {
        if (isHidden) {
            setText("");
        }
        else {
            Action action = getAction();
            if (action!=null) {
                setText(String.valueOf(action.getValue(Action.NAME)));
            }
        }
    };
    
    /**
     * Setup the border (invisible initially)
     */
    public TestGanttRolloverButton(Icon icon, String text) {
        this();
        setIcon(icon);
        _iconOn = icon;
        setText(text);
    }

    public void setIcon(Icon icon) {
        Action a = getAction();
        if (a != null) {
            // a.putValue(Action.SMALL_ICON,icon);
            _iconOn = icon;
        }
        super.setIcon(icon);
    }

    public void setIcon(Icon iconOn, Icon iconOff) {
        setIcon(iconOff);
        _iconOn = iconOn;
        _iconOff = iconOff;
    }

    public void setDefaultIcon(Icon iconOn) {
        setIcon(iconOn);
        _iconOn = iconOn;
    }

    public boolean isOpaque() {
        return false;
    }

    public void setEnabled(boolean b) {
        super.setEnabled(b);
        setBorderPainted(false);
        repaint();
    }

    public void paint(Graphics g) {
        if (isEnabled()) {
            super.paint(g);
        } else {
            Graphics2D g2 = (Graphics2D) g;
            g2.setComposite(c);
            super.paint(g2);
        }
    }

    private static AlphaComposite c = AlphaComposite.getInstance(
            AlphaComposite.SRC_OVER, 0.5f);

    /**
     * Make the border visible/invisible on rollovers
     */
    class MouseOverHandler extends MouseAdapter {
        public void mouseEntered(MouseEvent e) {
            if (isEnabled()) {
                setBorderPainted(true);
                setIcon(_iconOn);
            }
        }

        public void mouseExited(MouseEvent e) {
            setBorderPainted(false);
            if (getAction() instanceof RolloverAction)
                setIcon(((RolloverAction) getAction()).getIconOnMouseOver());
            else if (_iconOff != null)
                setIcon(_iconOff);
        }
    }

    class AutoRepeatHandler extends MouseAdapter {
        private Worker myWorker;

        public void mousePressed(MouseEvent e) {
            if (myAutoRepeatMilliseconds > 0) {
                myWorker = new Worker(e);
                myWorker.start();
            }
        }

        public void mouseReleased(MouseEvent e) {
            if (myWorker != null) {
                myWorker.interrupt();
                myWorker = null;
            }
        }
    }

    class Worker extends Thread {
        private ActionEvent myEvent;

        Worker(MouseEvent e) {
            myEvent = new ActionEvent(this, ActionEvent.ACTION_PERFORMED,
                    getActionCommand(), EventQueue.getMostRecentEventTime(), e
                            .getModifiers());
            ;
        }

        public void run() {
            while (true) {
                try {
                    Thread.sleep(myAutoRepeatMilliseconds);
                } catch (InterruptedException e) {
                    break;
                }
                if (isInterrupted()) {
                    break;
                }
                getAction().actionPerformed(myEvent);
            }
        }
    }

}