GridBagLayout alignment and Button style

Question

I am trying to align a button using the GridBagLayout but it look I just can't achieve that. Also I want to remove the JButton's texture from my custom button, but I can not.. This is what it looks like:

enter image description here

I want the buttons to be at the top( but using GridBagLayout) and also on the left and right margin of the green button there is the remains of the JButton style and I can't remove it completely.

Also, this is my code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TestPanel{

    public TestPanel(){

        JFrame frame = new JFrame();
        frame.add(new Panel1());
        frame.setVisible(true);
        frame.setSize(300, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new TestPanel();
    }


    public class Panel1 extends JPanel{
        /**
         * 
         */
        private static final long serialVersionUID = 1L;
        public Panel1(){
            setLayout(new GridBagLayout());
            GridBagConstraints c = new GridBagConstraints();
            ImageIcon im = new ImageIcon("Start.png");
            ImageIcon i = new ImageIcon("Start-Pressed.png");
            JButton button = new JButton(im);
            JButton but = new JButton("BUT");
            button.setRolloverEnabled(true);
            Insets margin = new Insets(-15,-10,-10,-10);
            button.setBorderPainted(false);
            button.setMargin(margin);
            button.setRolloverIcon(i);
            c.fill = GridBagConstraints.HORIZONTAL;
            c.weightx=0.5;
            c.gridx=0;
            c.gridy=0;
            add(button, c);
            c.gridx=2;
            c.gridy=1;
            add(but,c);

        }       
         }
          }

Edit:

c.gridy++;
c.fill = GridBagConstraints.VERTICAL;
c.weighty = 1;
c.add(new JLabel(" "),c);
c.gridy++;
c.weighty = 1;
c.fill = GridBagConstraints.NONE;
add(eButton, c);

score 2 · Accepted Answer · edited May 23 '17 at 10:26

2

You can achive it with help of dummy JLabel at bottom, like next(add to the end of constructor):
```
c.gridy++;
c.fill = GridBagConstraints.VERTICAL;
c.weighty = 1;
add(new JLabel(" "), c);
```
To remove margin you can try setContentAreaFilled() method
Instead of ImageIcon im = new ImageIcon("Start.png"); use ImageIcon im = new ImageIcon(Panel1.class.getResource("Start.png"));

Also see that answer.

edited May 23 '17 at 10:26

Community

1
1

answered Feb 03 '15 at 13:31

alex2410

10,904
3
25
41

Why should i use ImageIcon im = new ImageIcon(Panel1.class.getResource("Start.png")); ? – AXL Feb 03 '15 at 13:42
Read [here](http://stackoverflow.com/tags/embedded-resource/info) and [here](http://docs.oracle.com/javase/tutorial/uiswing/components/icon.html). – alex2410 Feb 03 '15 at 13:48
I dont understand the code you wrote at point 1 ... i know that gridy++ will add row 1, fill vertical will make it stretch vertically and weighty =1 is giving space between rows. But i don't understand how i can put the button at let's say bottom, not top :-?? – AXL Feb 03 '15 at 14:22
@AXL at point 1 adding label which grab all vertical space after components. you need add dummy label at top/bottom/left/right to grab free space and to anchor components opposite;) – alex2410 Feb 03 '15 at 14:31
I know that, but i just dont understand how... i know that its because of fill,but i don't know about the others. Could you please check my edit ? This is what i tried ( adding the label at top and the button at bottom). But it doesnt work – AXL Feb 03 '15 at 14:37
You need to use `fill/weightx/weighty` together, change in edit last `weighty` to `c.weighty = 0;`. Also read [tutorial for `GridBagLayout`](http://docs.oracle.com/javase/tutorial/uiswing/layout/gridbag.html) – alex2410 Feb 03 '15 at 14:42

GridBagLayout alignment and Button style

1 Answers1