Hi there.
i have a litle problem.
im trying to do GUI but there is a question i can't solve: i need to do a dynamic GUI so as if the user presses one button some combobox appear in my GUI frame, if another some checkBoxes.
How can i do this? maybe there is some way i can reload initial frame?
Thanks for answers
it should work
try this
hide the frame and show it the frame should be updated
if it still doesn t ot work try a little bit stronger approach
remove the contain and then add it again and call revalidate
make sure you revalidate all the component which need to be
jep... managed to do the revalidate to work...
but now i have another problem...
public void drawBox(int kiek) {
for(int i=0;i<kiek;i++)
{
NR1.add(jCheckBox1, new XYConstraints(222 , 67 + (postX * i-200*timesY), -1, -1));
}
NR1.revalidate();
after initializing drawBox with kiek=5 it draws me a window with five check boxes. but there is an option on the side to choose this amount from a combobox. and if i choose a number less then the previuos the extra checkbox doesn't disapear...
what could u suggest?>
Call invalidate() method before change something and validate() after that.
For example:
panel.invalidate();
panel.add();
panel.validate();
but you still can have a problem with frame: your components can demand more space when frame's size and you won't see its (depends on yout layout manager). In this case call .pack() method of your frame. This method changes size of frame to possible minimum size.
maybe someone can test:
public void drawBox(int kiek) {
NR1.invalidate();
//NR1.validate();//
int postX=20;
int postY=60;
JCheckBox jCheckBox1=null;
int timesY=0;
buttons.clear();
for(int i=0;i<kiek;i++)
{
timesY=i/10;
jCheckBox1 = new JCheckBox();
buttons.add(jCheckBox1);
jCheckBox1.setText(" " + (i+1)+" ");
NR1.add(jCheckBox1, new XYConstraints(222 +timesY*postY, 67 + (postX * i-200*timesY), -1, -1));
}
NR1.validate();
this is the whole procedure. but it doesn't work....
i get an eventaction and after it i call draw.... but it fails...
Message was edited by:
isolated>
You have problem with your layout manager not with validate method. XYConstaints - not standard layout.
Please try this example:
package test;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class MainFrame extends JFrame {
private JPanel NR1 = new JPanel();
public MainFrame() throws HeadlessException {
setLayout(new BorderLayout());
JButton b = new JButton("Add more checkboxes");
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
drawBox(5);
}
});
add(b, BorderLayout.NORTH);
add(NR1, BorderLayout.CENTER);
}
public void drawBox(int kiek) {
NR1.invalidate();
//int postX = 20;
//int postY = 60;
JCheckBox jCheckBox1 = null;
//int timesY = 0;
//buttons.clear();
for (int i = 0; i < kiek; i++) {
//timesY = i / 10;
jCheckBox1 = new JCheckBox();
//buttons.add(jCheckBox1);
jCheckBox1.setText(" " + (i + 1) + " ");
NR1.add(jCheckBox1);
//NR1.add(jCheckBox1, new XYConstraints(222 + timesY * postY, 67 + (postX * i - 200 * timesY), -1, -1));
}
NR1.validate();
}
public static void main(String[] args) {
MainFrame frame = new MainFrame();
frame.setSize(400, 300);
frame.setVisible(true);
}
}
It addes five checkboxes to panel when you press button.
Try don't use XYLayout:
1. It's better use relative layout
2. XYLayout - not default (it doesn't exist in JDK1.5). I don't known what realization of this layout you are using (Eclips and so on).
Try to change your code according to my example:
package test;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class MainFrame extends JFrame {
private JPanel NR1 = new JPanel();
public MainFrame() throws HeadlessException {
setLayout(new BorderLayout());
JButton b = new JButton("Add more checkboxes");
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
drawBox(5);
}
});
add(b, BorderLayout.NORTH);
add(NR1, BorderLayout.CENTER);
NR1.setLayout(null);
}
public void drawBox(int kiek) {
NR1.invalidate();
int postX = 20;
int postY = 60;
JCheckBox jCheckBox1 = null;
int timesY = 0;
//buttons.clear();
for (int i = 0; i < kiek; i++) {
timesY = i / 10;
jCheckBox1 = new JCheckBox();
//buttons.add(jCheckBox1);
jCheckBox1.setText(" " + (i + 1) + " ");
Dimension d = jCheckBox1.getPreferredSize();
jCheckBox1.setBounds(222 + timesY * postY, 67 + (postX * i - 200 * timesY),
d.width, d.height);
NR1.add(jCheckBox1);
}
NR1.validate();
NR1.repaint();
}
public static void main(String[] args) {
MainFrame frame = new MainFrame();
frame.setSize(400, 300);
frame.setVisible(true);
}
}
> Call invalidate() method before change something and validate() after that.
You don't need to call invalidate() before adding the component.
You use revalidate() after adding the component.
If you need further help then you need to create a [url http://homepage1.nifty.com/algafield/sscce.html]Short, Self Contained, Compilable and Executable, Example Program[/url] (SSCCE) that demonstrates the incorrect behaviour, because I can't guess exactly what you are doing based on the information provided.
Don't forget to use the [url http://forum.java.sun.com/help.jspa?sec=formatting]Code Formatting Tags[/url] so the posted code retains its original formatting.
public void jButton2_actionPerformed(ActionEvent e) {
jPanel1.invalidate();
int post=20;
for(int i=0;i<7;i++){
jCheckBox1 = new JCheckBox();
jCheckBox1.setText("jCheckBox" + i);
jPanel1.add(jCheckBox1,
new XYConstraints(205 , 41+ post * i, -1, -1));
}
jPanel1.validate();
jPanel1.repaint();
here http://saulius.sa.funpic.de/java/java.JPG u can find a part of what i'm trying to do..
lets say there are two buttons: the diference is
for(int i=0;i<7;i++)
and for(int i=0;i<5;i++)
after i paint the gui with 5 i can paint with seven... but if i try to paint 5 again i still see 7 checkboxes....
so what could be the reason?
If you call jButton2_actionPerformed method more that once you will have problems because you don't remove previouse checkboxes.
So when you press button you create 5 checkboxes. When you bress button again you create another 5 checkoxes (now on the JPanel you have 10 checkboxes and last 5 hide previouse 5)
To change it you should remove previouse checkboxes before inserting new as shown in example below:
public void jButton2_actionPerformed(ActionEvent e) {
jPanel1.invalidate();
jPanel1.removeAll(); // removes previouse checkboxes
int post=20;
.........
}
You have special list: buttons. So you can use it to get components for removing:
Iterator iter = buttons.iterator();
while (ite.hasNext()) {
panel.remove((Component)iter.next());
}
buttons.clear();
hi again...
i have gui with a combobox and a button.
when i press the button some new gui addElement.show apears.
in the new gui i can add new record.
after doing all this i want to reload the parent gui(with combobox) but with no luck.
so how can i access and revalidate/repaint parent gui?
maybe there are any other ways how i can do such things?
example of what i have
http://saulius.sa.funpic.de/java/java1.JPG
Trying to do thing like in the link above...
I can't find out how after presing a button "registruoti" i can reload "klientas" GUI.
any suggestions?