spinner.java

水晶 ? ? 报表 ? ? ? 源码

/* ===================================================
 * JCommon : a free general purpose Java class library
 * ===================================================
 *
 * Project Info:  http://www.jfree.org/jcommon/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * ------------
 * Spinner.java
 * ------------
 * (C) Copyright 2002, 2003, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id $
 *
 * Changes
 * -------
 * 14-Oct-2002 : Version 1 (DG);
 *
 */

package org.jfree.ui;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 * A very basic spinner component, used for demo purposes only.
 *
 * @author David Gilbert
 */
public class Spinner extends JPanel implements MouseListener {

    /** The current value. */
    private int value;

    /** The text field displaying the value. */
    private JTextField textField;

    /** The arrow button panel. */
    private JPanel buttonPanel;

    /** The up button. */
    private ArrowPanel upButton;

    /** The down button. */
    private ArrowPanel downButton;

    /**
     * Creates a new spinner.
     *
     * @param value  the initial value.
     */
    public Spinner(int value) {
        super(new BorderLayout());
        this.value = value;
        this.textField = new JTextField(Integer.toString(this.value));
        this.textField.setHorizontalAlignment(JTextField.RIGHT);
        add(this.textField);
        this.buttonPanel = new JPanel(new GridLayout(2, 1, 0, 1));
        this.upButton = new ArrowPanel(ArrowPanel.UP);
        this.upButton.addMouseListener(this);
        this.downButton = new ArrowPanel(ArrowPanel.DOWN);
        this.downButton.addMouseListener(this);
        this.buttonPanel.add(this.upButton);
        this.buttonPanel.add(this.downButton);
        add(this.buttonPanel, BorderLayout.EAST);
    }

    /**
     * Returns the current value.
     *
     * @return the current value.
     */
    public int getValue() {
        return this.value;
    }

    /**
     * Receives notification of mouse clicks.
     *
     * @param e  the mouse event.
     */
    public void mouseClicked(MouseEvent e) {
        if (e.getSource() == this.upButton) {
            this.value++;
            this.textField.setText(Integer.toString(this.value));
            firePropertyChange("value", this.value - 1, this.value);
        }
        else if (e.getSource() == this.downButton) {
            this.value--;
            this.textField.setText(Integer.toString(this.value));
            firePropertyChange("value", this.value + 1, this.value);
        }
    }

    /**
     * Receives notification of mouse events.
     *
     * @param e  the mouse event.
     */
    public void mouseEntered(MouseEvent e) {
        // ignored
    }

    /**
     * Receives notification of mouse events.
     *
     * @param e  the mouse event.
     */
    public void mouseExited(MouseEvent e) {
        // ignored
    }

    /**
     * Receives notification of mouse events.
     *
     * @param e  the mouse event.
     */
    public void mousePressed(MouseEvent e) {
        // ignored
    }

    /**
     * Receives notification of mouse events.
     *
     * @param e  the mouse event.
     */
    public void mouseReleased(MouseEvent e) {
        // ignored
    }

}