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wildbill
Joined: 20 Nov 2010
Posts: 3
Location: CT
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 Posted: Sat Nov 20, 2010 2:35 pm Post subject: Newbie question: user input from a dialog box |
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Ok, so I'm using netbeans 6.9.1 to make a netbeans platform application. And all I'm trying to do here is store the user input from a text field in a dialog box somewhere after the dialog box closes. So my program will have some server hostname or ip address stored in a variable somewhere.
So, this is the code for the 'Server Select' toolbar button:
| Code: |
public final class ServerSelect implements ActionListener {
private String server;
public void setServer(String newServer) {
server = newServer;
}
@Override
public void actionPerformed(ActionEvent e) {
ServerSelectDialog dialog = new ServerSelectDialog(null, true);
dialog.setVisible(true);
}
}
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This is the class for the dialog box (there's more code in here really but i'm just showing the OK button handler code):
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public class ServerSelectDialog extends javax.swing.JDialog {
/* OK button */
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt)
{
System.out.println(jTextField1.getText());
setVisible(false);
dispose();
}
/* ... */
}
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So it prints out what is in 'jTextField1' to the console when I click OK... great. But I need to save it to a variable somewhere. In the OK button handler I've tried ServerSelect.setServer(jTextField1.getText()) but clearly that's not right. I would think it would be something like instanceOfServerSelect.setServer(jTextField1.getText()) but i have no idea where ServerSelect even gets instantiated. And is the instance of ServerSelect even where I should store this?
I normally code cgi apps in C or Perl... I haven't done java in a while and this is my first time with netbeans but it seems like I could do a lot with it if I could just get the basics down...
Thanks |
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areeda
Joined: 28 Aug 2008
Posts: 469
Location: Los Angeles
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| Posted: Sat Nov 20, 2010 3:35 pm Post subject: |
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There a a few ways to do this.
My usual approach is to store it in the dialog object with a getter method. On OK set a status variable and call setVisible(false) instead of dispose. This keeps the dialog object after closing the window.
Then in the object that inovkes this dialog, check the status and if OK get all the variables from the dialog.
Another not so clean but more C-like approach is to pass a pointer to the calling object to the Dialog object. Then on OK call a setter method in the caller.
If either of those appeal to you but is not clear I can go into more detail.
joe |
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wildbill
Joined: 20 Nov 2010
Posts: 3
Location: CT
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| Posted: Sat Nov 20, 2010 5:10 pm Post subject: Newbie question: user input from a dialog box |
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Cool I think I got it thanks to your tip, thanks! Not sure if this is the standard way of doing this sort of thing though but it seems to make sense this way...
So now I have:
| Code: |
public final class ServerSelect implements ActionListener {
private ServerSelectDialog dialog;
public ServerSelect()
{
dialog = new ServerSelectDialog(null, true);
}
@Override
public void actionPerformed(ActionEvent e) {
dialog.setVisible(true);
}
}
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And...
| Code: |
public class ServerSelectDialog extends javax.swing.JDialog {
private String server;
/* ... */
/* Cancel button */
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
{
setVisible(false);
jTextField1.setText(server);
}
/* OK button */
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt)
{
server = jTextField1.getText();
setVisible(false);
}
public String getServer()
{
return server;
}
}
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If anyone thinks this is the wrong way to do it though please let me know. |
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areeda
Joined: 28 Aug 2008
Posts: 469
Location: Los Angeles
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| Posted: Sat Nov 20, 2010 6:55 pm Post subject: |
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That's pretty close to the way I do it.
In your serverSelect, ActionPerformed method:
SetVisible(true) returns only after the dialog calls SetVisible(false)
So that's a good place to call getServer() and perhaps dispose of the dialog. |
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wildbill
Joined: 20 Nov 2010
Posts: 3
Location: CT
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| Posted: Sat Nov 20, 2010 7:27 pm Post subject: |
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Ok yeah it did seem a little strange to leave that dialog box hanging around even though it was not visible... Thanks again!
| Code: |
public final class ServerSelect implements ActionListener {
private String server;
@Override
public void actionPerformed(ActionEvent e) {
ServerSelectDialog dialog = new ServerSelectDialog(null, true);
dialog.setServer(server);
dialog.setVisible(true);
server = dialog.getServer();
dialog.dispose();
}
}
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