GridBag

[lakshmi nair]

The above code displays 5 buttons. What i want is the second should begin at a position half from the first. I wrote this expecting a result like that. What change must i make?

import java.awt.*;
public class GridBagExample  extends Frame{
GridBagExample() {
        GridBagLayout layout = new GridBagLayout();
setLayout(layout);
GridBagConstraints constr = new GridBagConstraints();
Button b = new Button("1st button");
constr.gridx = 0;
constr.gridy = 0;
constr.weightx = 1.0;
constr.weighty = 1.0;
constr.fill = GridBagConstraints.BOTH;
constr.gridwidth = 2;
add(b,constr);
constr.gridx = 1;
constr.gridy = 1;
constr.gridwidth = 2;
constr.fill = GridBagConstraints.BOTH;
Button n = new Button("2nd button");
add(n,constr);
constr.gridx = 2;
constr.gridy = 2;
Button n2 = new Button("3rd button");
add(n2,constr);
constr.gridx = 3;
constr.gridy = 3;
Button n3 = new Button("4th button");
add(n3,constr);
constr.gridx = 4;
constr.gridy = 4;
Button n4 = new Button("5th button");
add(n4,constr);
setSize(150,150);
        setVisible(true);
}
    public static void main(String[] args){
new GridBagExample();
    }
}

Thanx
Lakshmi

[Aru Ven]

Lakshmi,
Thanks. Ur question made me know more about GB.
Did u find out how to do..... Coz from 1 whole day I'm experimenting on grid bag layout but I could not get exactly the o/p.
Do lemme know if u find out something... mean while lemme experiment more.....
Aruna

[Viji Bharat]

Lakshmi:
If I have understood you correct, you are looking to implement something like this
<button1>
<button2> (button2 is right below button1 and its left edge starts exactly at the center of button1)
<button3> (button3 should be right below button2 and its left edge should be exactly at the center of button2)
etc. I haven't been able to do that!!
However I tried other possibilities. The code given below meets your requirements to some extent, I think!

import java.awt.*;
public class GridBagExample  extends Frame{
GridBagExample() {        
GridBagLayout gb = new GridBagLayout();
setLayout(gb);
GridBagConstraints constr = new GridBagConstraints();
Button b = new Button("1st button");
add(b);
constr.gridx = 0;
gb.setConstraints(b,constr);
Button b1 = new Button("1st2 button");
add(b1);
constr.gridx = 1;
gb.setConstraints(b1,constr);
Button n = new Button("2nd button");
add(n);
constr.gridx = 0;
constr.gridy = 1;
constr.gridwidth=2;
gb.setConstraints(n, constr);
Button b3 = new Button("3rd button");
add(b3);
constr.gridx = 1;
constr.gridy = 2;
gb.setConstraints(b3,constr);
setSize(100,100);        
setVisible(true);
}    
public static void main(String[] args){
new GridBagExample();    
}
}

[This message has been edited by Viji Bharat (edited November 22, 2000).]

[lakshmi nair]

Hi Aruna, Viji
I didnt try it further and as you see there are not many replies. Viji's code does not work correctly with me, i dont know why. Anyway less tensed, gave the test today and passed with 83. Time for lot of experiments now!!!