change colors

[calblue]

Hi,
I need to modify following program inorder to incoroporate colors by creating toolbar.Toolbar should have 6 radio buttons Red,Black,Magenta,Blue,Green & Yellow. When new color is seleted , drawing should occur in new color.

Thank you in advance



package guidemo1;

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;

public class Painter
extends Applet{

private int xValue=-1, yValue=-10;


public void paint(Graphics g){

g.drawString("Drag the mouse to draw",10,20);
g.fillOval(xValue,yValue,4,4);


}

public void update(Graphics g){
paint(g);

}

public boolean mouseDrag(Event evtObj,int x,int y){

xValue=x;
yValue=y;
repaint();
return true;
}

}

[hardwired]

You posted version 1.0 code. This is version 1.5 code:

Code:

//  <applet code="PainterApplet" width="400" height="400"></applet>
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;

public class PainterApplet extends JApplet implements ActionListener {
    PainterPanel painterPanel = new PainterPanel();

   public void init() {
       painterPanel.addMouseListener(mia);
       painterPanel.addMouseMotionListener(mia);
       getContentPane().add(painterPanel);
       getContentPane().add(getButtonPanel(), "Last");
    }

    private JPanel getButtonPanel() {
        Color[] colors = { Color.red, Color.green.darker(), Color.blue };
        JPanel panel = new JPanel(new GridLayout(1,0));
        panel.setPreferredSize(new Dimension(100,30));
        for(int j = 0; j < colors.length; j++) {
            JButton button = new JButton();
            button.setBackground(colors[j]);
            button.addActionListener(this);
            panel.add(button);
        }
        return panel;
    }

    public void actionPerformed(ActionEvent e) {
        JButton button = (JButton)e.getSource();
        painterPanel.setColor(button.getBackground());
    }

    private class PainterPanel extends JPanel {
        private int x = 0, y = 0, w = 0, h = 0;
        Color color = Color.black;

        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            g.drawString("Drag the mouse to draw",10,20);
            g.setColor(color);
            g.fillOval(x, y, w, h);
        }

        public void setColor(Color color) {
            this.color = color;
            repaint();
        }

        public void setOval(Point start, Point end) {
            x = (end.x > start.x) ? start.x : end.x;
            y = (end.y > start.y) ? start.y : end.y;
            w = end.x - start.x;
            h = end.y - start.y;
            if(w < 0) w *= -1;
            if(h < 0) h *= -1;
            repaint();
        }
    }

    private MouseInputAdapter mia = new MouseInputAdapter() {
        Point start;

        public void mousePressed(MouseEvent e) {
            start = e.getPoint();
        }

        public void mouseDragged(MouseEvent e) {
            painterPanel.setOval(start, e.getPoint());
        }
    };
}