GridBagLayout:: a few Qs

[miguel lisboa]

i wonder how one can control one component's display area

i'm playing with this gui and some components show much larger then their preferred or minimum sizes should predict; i even created a JButton customized class were i fixed preferred button size but with no effect

i also tried several combinations of constraints but with no effect.

I would like buttons of first row appear with their minimum or at least heir preferred size: that would make subsequent buttons to display smaller too.

How can i achieve it?

TiA

[ July 02, 2005: Message edited by: miguel lisboa ]
[ July 04, 2005: Message edited by: miguel lisboa ]

[Swati Udas]

Cannot see the sanpshot of your UI.
Can u send the relevant code instead.

[miguel lisboa]

oops

thanks for pointing that out
actually i'm not at my pc, so as soon as i get there i'll post it

[miguel lisboa]

i've img correctly posted now, i hope

in case you need, i'll post relevant code

TiA

[Swati Udas]

Yes now I can see the snapshot..
I think u have set gridwidth=1; or some such setting for the GridBagConstraints for the Buttons..
If this is not the case..please post the code snippet..
else remove the gridwidth setting.. just dont set it to anything.

[miguel lisboa]

that's exactly what i have:

// LINHA 1
 
c.insets = new Insets(2, 2, 2, 10);
 
c.gridx = 0;// coluna 0
 
c.gridy = 0;// fila 0
 
c.weightx = 1.0;//encosta � esq
 
c.anchor = GridBagConstraints.LINE_END;// alinha � dta
 
JLabel lbl1 = new JLabel("Conven��o");
 
panel.add(lbl1, c);
 

 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
c.ipady = 3;
 
c.insets = new Insets(2, 2, 2, 10);
 
panel.add(new JTextField(20), c);
 

c.insets = new Insets(0, 0, 0, 0);
 
c.gridx = 2;
 
c.gridheight = 2;
 
c.ipady = 0;
 
JButton b1 = new JButton("|<<");
 
c.fill = GridBagConstraints.HORIZONTAL;
 
panel.add(b1, c);
 

 
c.gridx = 3;
 
JButton b2 = new JButton("<");
 
panel.add(b2, c);
 

 
c.gridx = 4;
 
panel.add(new JButton(">"), c);
 

 
c.gridx = 5;
 
panel.add(new JButton(">>|"), c);  

i kept the HORIZONTAL fill because i want the buttons together; if i change to fill = NONE then all buttons float aside but still occupy that whole space... too big too much

[Swati Udas]

U can adjust the spacing between buttons by adjusting insets..
moreover the buttons with occupy whole space because u have given anchor=lineEnd.
Try giving EAST/WEST as u want it to be.
Another tip is ..
sometimes using the same gridBagconstraints variable for multiple UI elements can mess up the UI..(as per my experience).. So I prefer to use a new GridBagConstraints variable for each button/UI element.

[miguel lisboa]

control buttons width that's what i'll do as soon as i have some time ... and i guess that's all what's left

moreover the buttons with occupy whole space because u have given anchor=lineEnd.
(...)
sometimes using the same gridBagconstraints variable for multiple UI elements can mess up the UI..(as per my experience).. So I prefer to use a new GridBagConstraints variable for each button/UI element.

bingo!

thanks a lot!
[ July 05, 2005: Message edited by: miguel lisboa ]

[miguel lisboa]

i did it; just in case someone is interested, here's the whole code:

import javax.swing.*;
 
import java.awt.*;
 
 
 
public class BotaoPequeno extends JButton {
 
static final long serialVersionUID = 2074645935687099318L;
 
 
 
public BotaoPequeno(String txt) {
 
super(txt);
 
setPreferredSize(new Dimension(52, 26));
 
}
 
}  

import javax.swing.*;
 
import java.awt.*;
 
 
 
public class Botao extends JButton {
 
 static final long serialVersionUID = 2074645935687099318L;
 
 
 
public Botao(String txt) {
 
super(txt);
 
setPreferredSize(new Dimension(104, 26));
 
}
 
}  

import javax.swing.*;
 
import java.awt.*;
 
import javax.swing.border.*;
 
import java.awt.event.*;
 
 
 
// C:/JavaTutorial/uiswing/components/example-1dot4/TextSamplerDemo.java
 
// C:/JavaTutorial/uiswing/layout/gridbag.html
 
public class Teste extends JFrame {
 
static final long serialVersionUID = 2889265010042717001L;
 
private JPanel panel;
 
private GridBagConstraints c;
 
 
 
public Teste() {
 
super("Editar Conven��es");
 
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 
 
menu();
 
 
 
panel = new JPanel();
 
panel.setLayout(new GridBagLayout());
 
panel.setBorder( new EmptyBorder( new Insets(10, 0, 10, 10 ) ) );
 
c  = new GridBagConstraints();
 
 
 
Dimension shortField = new Dimension( 52, 26 );
 
Dimension mediumField = new Dimension( 106, 26 );
 
 
 
// LINHA 1
 
c.insets = new Insets(2, 2, 2, 10);
 
c.gridx = 0;// coluna 0
 
c.gridy = 0;// fila 0
 
c.weightx = 1.0;//encosta � esq
 
c.anchor = GridBagConstraints.LINE_END;// alinha � dta
 
JLabel lbl1 = new JLabel("Conven��o");
 
panel.add(lbl1, c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
c.ipady = 3;
 
c.insets = new Insets(2, 2, 2, 10);
 
panel.add(new JTextField(20), c);
 
 
 
c  = new GridBagConstraints();
 
c.insets = new Insets(0, 0, 0, 0);
 
c.anchor = GridBagConstraints.LINE_END;
 
c.gridx = 2;
 
c.gridheight = 2;
 
c.ipady = 0;
 
JButton b1 = new BotaoPequeno("|<<");
 
//c.fill = GridBagConstraints.HORIZONTAL;
 
panel.add(b1, c);
 
 
 
c.anchor = GridBagConstraints.LINE_START;
 
//c  = new GridBagConstraints();
 
c.gridx = 3;
 
JButton b2 = new BotaoPequeno("<");
 
panel.add(b2, c);
 
 
 
//c  = new GridBagConstraints();
 
c.gridx = 4;
 
panel.add(new BotaoPequeno(">"), c);
 
//c  = new GridBagConstraints();
 
c.gridx = 5;
 
panel.add(new BotaoPequeno(">>|"), c);
 
 
 
// LINHA 2
 
c.gridx = 0;
 
c.insets = new Insets(2, 2, 2, 10);
 
c.weightx = 1.0;
 
c.gridy = 1;// fila 1
 
c.gridheight = 1;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.fill = GridBagConstraints.NONE;
 
panel.add(new JLabel("Acto M�dico"), c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
c.ipady = 3;
 
panel.add(new JTextField(), c);
 
 
 
// LINHA 3
 
c.gridx = 0;
 
c.weightx = 1.0;
 
c.gridy = 2;
 
c.gridheight = 1;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.fill = GridBagConstraints.NONE;
 
panel.add(new JLabel("Comparticipa��o"), c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
//c.ipady = 3;
 
panel.add(new JTextField(), c);
 
 
 
c  = new GridBagConstraints();
 
c.gridx = 2;
 
c.gridheight = 2;
 
//c.anchor = GridBagConstraints.CENTER;
 
c.gridwidth = 2;
 
//c.fill = GridBagConstraints.HORIZONTAL;
 
c.ipady = 0;
 
c.insets = new Insets(0, 0, 0, 0);
 
c.anchor = GridBagConstraints.LINE_END;
 
JButton act = new Botao("Actualizar");
 
panel.add(act, c);
 
 
 
c.gridx = 4;
 
//c.fill = GridBagConstraints.HORIZONTAL;
 
c.anchor = GridBagConstraints.LINE_START;
 
panel.add(new Botao("Eliminar"), c);
 
 
 
//LINHA 4
 
c.gridx = 0;
 
c.insets = new Insets(2, 2, 2, 10);
 
c.weightx = 1.0;
 
c.gridy = 3;
 
c.gridwidth = 1;
 
c.gridheight = 1;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.fill = GridBagConstraints.NONE;
 
panel.add(new JLabel("Data"), c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
c.gridwidth = 1;
 
c.ipady = 3;
 
panel.add(new JTextField(), c);
 
 
 
//LINHA 5
 
c.gridx = 0;
 
c.weightx = 1.0;
 
c.gridy = 4;
 
c.gridwidth = 1;
 
c.gridheight = 1;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.fill = GridBagConstraints.NONE;
 
panel.add(new JLabel("Entidade"), c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
c.gridwidth = 1;
 
//c.ipady = 3;
 
panel.add(new JTextField(), c);
 
 
 
c  = new GridBagConstraints();
 
c.gridx = 2;
 
c.insets = new Insets(0, 0, 0, 0);
 
c.gridheight = 2;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.gridwidth = 2;
 
//c.fill = GridBagConstraints.HORIZONTAL;
 
c.ipady = 0;
 
JButton lim = new Botao("Limpar");
 
panel.add(lim, c);
 
 
//c  = new GridBagConstraints();
 
c.gridx = 4;
 
c.anchor = GridBagConstraints.LINE_START;
 
//c.fill = GridBagConstraints.HORIZONTAL;
 
c.ipady = 0;
 
panel.add(new Botao("Criar"), c);
 
 
 
//LINHA 6
 
c.gridx = 0;
 
c.insets = new Insets(2, 2, 2, 10);
 
c.weightx = 1.0;
 
c.gridy = 5;
 
c.gridheight = 1;
 
c.gridwidth = 1;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.fill = GridBagConstraints.NONE;
 
panel.add(new JLabel("A pagar pelo Utente"), c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
c.gridwidth = 1;
 
c.ipady = 3;
 
panel.add(new JTextField(), c);
 
 
 
//LINHA 7
 
c.gridx = 0;
 
c.weightx = 1.0;
 
c.gridy = 6;
 
c.gridheight = 1;
 
c.anchor = GridBagConstraints.LINE_END;
 
c.fill = GridBagConstraints.NONE;
 
panel.add(new JLabel("Reten��o na fonte"), c);
 
 
 
c.gridx = 1;
 
c.fill = GridBagConstraints.HORIZONTAL;
 
//c.ipady = 3;
 
panel.add(new JTextField(), c);
 
 
 
 
JRadioButton radio1 = new JRadioButton("sim");
 
radio1.setSelected(false);
 
c.gridx = 2;
 
c.ipady = 0;
 
panel.add(radio1, c);
 
 
 
c.gridx = 4;
 
c.gridheight = 1;
 
c.anchor = GridBagConstraints.CENTER;
 
c.gridwidth = 2;
 
c.fill = GridBagConstraints.NONE;
 
//c.ipady = -3;
 
panel.add(new Botao("Sair"), c);
 
 
 
getContentPane().add(panel);
 
setSize(846, 491);
 
setVisible(true);
 
}
 
 
 
private void menu() {
 
JMenuBar menuBar = new JMenuBar();
 
setJMenuBar(menuBar);
 
JMenu skins = new JMenu("Skins");
 
menuBar.add(skins);
 
 
 
JMenuItem xp = new JMenuItem("winXp");
 
skins.add(xp);
 
 
 
JMenuItem metal = new JMenuItem("java");
 
skins.add(metal);
 
 
 
JMenuItem motif = new JMenuItem("motif");
 
skins.add(motif);
 
 
 
xp.addActionListener(new ActionListener() {
 
public void actionPerformed(ActionEvent e) {
 
try{
 
UIManager.setLookAndFeel(
 
"com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
 
}
 
catch(Exception cnfe){}
 
SwingUtilities.updateComponentTreeUI(Teste.this);
 
}});
 
 
 
motif.addActionListener(new ActionListener(){
 
public void actionPerformed(ActionEvent e) {
 
try{
 
UIManager.setLookAndFeel(
 
"com.sun.java.swing.plaf.motif.MotifLookAndFeel");
 
}
 
catch(Exception cnfe){}
 
SwingUtilities.updateComponentTreeUI(Teste.this);
 
}});
 
 
 
metal.addActionListener(new ActionListener() {
 
public void actionPerformed(ActionEvent e) {
 
try{
 
UIManager.setLookAndFeel(
 
"javax.swing.plaf.metal.MetalLookAndFeel");
 
}
 
catch(Exception cnfe){}
 
SwingUtilities.updateComponentTreeUI(Teste.this);
 
}});
 
}
 
 
 
public static void main(String args[]) {
 
new Teste();
 
}
 
}  

BTW just a curiosity: i typed twice (for both buttons subclasses)
>serialver ClassName
and got the very same serialVersionUID
[ July 05, 2005: Message edited by: miguel lisboa ]

[Swati Udas]

Great!! can we see a snapshot of your final result now !!

[miguel lisboa]