buttonarrowicon.java

更方便的SWING

/*
 * PSwing Utilities -- Nifty Swing Widgets
 * Copyright (C) 2002  Pallas Technology
 * 
 * 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
 * 
 * Pallas Technology
 * 1170 HOWELL MILL RD NW
 * SUITE 306
 * ATLANTA GEORGIA 30318
 * 
 * PHONE [phone]
 * EMAIL [e-mail]
 * 
 * www.pallastechnology.com
 **************************************************************************
 * $Archive: SwingTools$
 * $FileName: ButtonArrowIcon.java$
 * $FileID: 23$
 *
 * Last change:
 * $AuthorName: Rob MacGrogan$
 * $Date: 2/10/03 5:07 PM$
 * $VerID: 65$
 * $Comment: $
 **************************************************************************/
package com.pallas.swing.spinner;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

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

/**
 * Title:   $FileName: ButtonArrowIcon.java$
 * @version $VerNum: 2$
 * @author $AuthorName: Rob MacGrogan$<br><br>
 * 
 * $Description: Left/Right arrow icon.$<br>
 * $KeyWordsOff: $<br><br>
 */
public class ButtonArrowIcon implements Icon {
  public static final int LEFT = 1;
  public static final int RIGHT = 2;

  protected int direction;
  protected int width = 8;
  protected int height = 8;

  public ButtonArrowIcon(int direction) {
    this.direction = direction;
  }

  public int getIconWidth() {
    return width;
  }

  public int getIconHeight() {
    return height;
  }

  public void paintIcon(Component c, Graphics g, int x, int y) {
    Color bg = c.getBackground();
    Color light = bg.darker();
    Color shade = bg.brighter();

    int w = width;
    int h = height;
    int m = h / 2;
    if (direction == LEFT) {
      Polygon triangle = new Polygon();
      triangle.addPoint(x, y + m);
      triangle.addPoint(x + w, y);
      triangle.addPoint(x + w, y + h);
      g.setColor(Color.BLACK);
      g.fillPolygon(triangle);

      g.setColor(light);
      g.drawLine(x, y + m, x + w, y);
      g.drawLine(x, y + m, x + w, y + h);
      g.setColor(shade);
      g.drawLine(x + w, y, x + w, y + h);
    }
    if (direction == RIGHT) {
      Polygon triangle = new Polygon();
      triangle.addPoint(x, y);
      triangle.addPoint(x, y + h);
      triangle.addPoint(x + w, y + m);
      g.setColor(Color.BLACK);
      g.fillPolygon(triangle);

      g.setColor(light);
      g.drawLine(x, y, x, y + h);
      g.drawLine(x, y, x + w, y + m);
      g.setColor(shade);
      g.drawLine(x, y + h, x + w, y + m);
    }
  }
  
  public static void main(String[] args){
    try{
      JFrame frame = new JFrame();
      
      JButton btnL = new JButton(new ButtonArrowIcon(LEFT)); 
      JButton btnR = new JButton(new ButtonArrowIcon(RIGHT)); 

      JPanel panel = new JPanel();
      panel.add(btnL);
      panel.add(btnR);

      frame.getContentPane().add(panel);
      
      frame.addWindowListener
          (new
            WindowAdapter() {
              public void windowClosing(WindowEvent e){
                System.exit(0);
              }
            }//end anon class
      );
  
  
      Dimension sd = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
      int width = 350;
      int height = 150;
      int x = (sd.width - width) / 2;
      int y = (sd.height - height) /2;
  
      frame.setBounds(x, y, width, height);
      //setLookAndFeel();
  
      frame.setVisible(true);
    }
    catch (Throwable thr){
    }
  }
}