시소당

Color Composite

import  java.awt.AlphaComposite;
import  java.awt.BasicStroke;
import  java.awt.BorderLayout;
import  java.awt.Color;
import  java.awt.Container;
import  java.awt.GradientPaint;
import  java.awt.Graphics;
import  java.awt.Graphics2D;
import  java.awt.Rectangle;
import  java.awt.TexturePaint;
import  java.awt.event.WindowAdapter;
import  java.awt.event.WindowEvent;
import  java.awt.geom.Rectangle2D;
import  java.awt.image.BufferedImage;

import  javax.swing.JFrame;
import  javax.swing.JLabel;
import  javax.swing.JPanel;
import  javax.swing.JSlider;
import  javax.swing.JTextField;
import  javax.swing.event.ChangeEvent;
import  javax.swing.event.ChangeListener;

public  class  ColorComposite  extends  JFrame  {
    MyCanvas  canvas;

    JTextField  textField;

    float  alphaValue  =  0.65f;

    public  ColorComposite()  {
        super();
        Container  container  =  getContentPane();

        canvas  =  new  MyCanvas();
        container.add(canvas);

        JPanel  panel  =  new  JPanel();

        JLabel  label  =  new  JLabel("Color-Composite:  ");

        JSlider  slider  =  new  JSlider(JSlider.HORIZONTAL,  0,  100,  65);
        slider.addChangeListener(new  ChangeListener()  {
            public  void  stateChanged(ChangeEvent  e)  {
                JSlider  tempSlider  =  (JSlider)  e.getSource();
                alphaValue  =  (float)  (tempSlider.getValue()  /  100.0);
                textField.setText(Float.toString(alphaValue));
                canvas.repaint();
            }
        });

        textField  =  new  JTextField("0.65",  4);

        panel.add(label);
        panel.add(slider);
        panel.add(textField);

        container.add(BorderLayout.SOUTH,  panel);

        addWindowListener(new  WindowAdapter()  {
            public  void  windowClosing(WindowEvent  e)  {
                System.exit(0);
            }
        });
        setSize(450,450);
        setVisible(true);
    }

    public  static  void  main(String  arg[])  {
        new  ColorComposite();
    }

    class  MyCanvas  extends  JLabel  {
        Rectangle2D  rec1,  rec2,  rec3,  rec4,  rec5;

        MyCanvas()  {
            rec1  =  new  Rectangle2D.Float(25,  25,  75,  150);
            rec2  =  new  Rectangle2D.Float(125,  25,  100,  75);
            rec3  =  new  Rectangle2D.Float(75,  125,  125,  75);
            rec4  =  new  Rectangle2D.Float(225,  125,  125,  75);
            rec5  =  new  Rectangle2D.Float(150,  50,  125,  175);

            setBackground(Color.white);
            setSize(400,  225);
        }

        public  void  paint(Graphics  g)  {
            Graphics2D  g2D  =  (Graphics2D)  g;

            AlphaComposite  ac  =  AlphaComposite.getInstance(
                    AlphaComposite.SRC_OVER,  alphaValue);
            g2D.setComposite(ac);

            g2D.setStroke(new  BasicStroke(5.0f));
            g2D.draw(rec1);

            GradientPaint  gp  =  new  GradientPaint(125f,  25f,  Color.yellow,  225f,
                    100f,  Color.blue);
            g2D.setPaint(gp);
            g2D.fill(rec2);

            BufferedImage  bi  =  new  BufferedImage(5,  5,
                    BufferedImage.TYPE_INT_RGB);
            Graphics2D  big  =  bi.createGraphics();
            big.setColor(Color.magenta);
            big.fillRect(0,  0,  5,  5);
            big.setColor(Color.black);
            big.drawLine(0,  0,  5,  5);
            Rectangle  r  =  new  Rectangle(0,  0,  5,  5);

            TexturePaint  tp  =  new  TexturePaint(bi,  r);

            g2D.setPaint(tp);
            g2D.fill(rec3);

            g2D.setColor(Color.green);
            g2D.fill(rec4);
            g2D.setColor(Color.red);
            g2D.fill(rec5);
        }
    }
}
[2008년  03월  23일  19:20:48  수정되었습니다.]