GridLayout woes
I made a simple program to display a digit using the method drawline ( it's a school project ). The program needs to be an applet, and have a combo box for selecting the background color of the digit, and radial boxes to select the color of the digit it's self.
My problem is that I had this code:
Container c = getContentPane();
c.setLayout(null);
And that made it so I couldn't add in a JTextField, which I needed to capture keystrokes.
I switched over to this code:
c.setLayout(new GridLayout(13,3));
for(int i = 0;i<27;i++)
c.add(new Component(){});
which is, Obvoiusly not optimal coding, but leaves a nice big area for me to draw in with paint()
What I'd like t do is make some sort of image using drawline, and then put that into my Layout manager.
[829 byte] By [
Josiah4jca] at [2007-11-26 19:10:45]
If you think you want to do some drawing on a blank region of the content pane,
what you *really* want to do (trust us) is define a custom component that
draws on itself, and add this component to the appropriate container:
import java.awt.*;
import javax.swing.*;
public class DrawingExample extends JPanel {
protected void paintComponent(Graphics g) {
super.paintComponent(g);
//do drawing here:
g.fillOval(0,0,getWidth(),getHeight());
}
public static void main(String[] args) {
EventQueue.invokeLater(buildApp);
}
static Runnable buildApp = new Runnable() {
public void run() {
JComponent comp = new DrawingExample();
comp.setBackground(Color.BLACK);
comp.setForeground(Color.GREEN);
comp.setPreferredSize(new Dimension(300,100));
JPanel cp = new JPanel(new BorderLayout());
cp.add(comp, BorderLayout.CENTER);
add(cp, BorderLayout.NORTH);
add(cp, BorderLayout.SOUTH);
add(cp, BorderLayout.EAST);
add(cp, BorderLayout.WEST);
JFrame f = new JFrame();
f.setContentPane(cp);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
void add(JPanel cp, String constraint) {
JLabel label = new JLabel(constraint, SwingConstants.CENTER);
label.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
cp.add(label, constraint);
}
};
}
