set * at tab title

[keffie91]

Hello I am building a Programming editor. It make us of a JTabbedPane. Now I wat that there appears a * at the tab when your file is not saved.

I wrote this:
private class MyKeyListener implements KeyListener{
public void keyPressed(KeyEvent e){
String title = tab.getTitleAt(tab.getSelectedIndex());
String update = title + "*";
tab.setTitleAt(tab.getSelectedIndex(),update);
}
}

This works not correct. Everytime I press a key, there is a * added to the tab title. You understand that I only want one *. I have tried something with a bool, but it was not a suc6.

Does anyone have any suggestions?

[Norm]

Quote:

String title = tab.getTitleAt(tab.getSelectedIndex());
String update = title + "*";

The problem is here.
What if title currently has an "*" at the end? This code will always add another "*".
You need to save the original title in a variable. Then either use the original or the original + "*" when you setTitle

[keffie91]

String original = tab.getTitleAt(tab.getSelectedIndex());
if(!(original.equals(original + "*"))){
tab.setTitleAt(tab.getSelectedIndex(),original + "*");
}
else{
tab.setTitleAt(tab.getSelectedIndex(),original);
}

I have also tried == instead of .equals . But i doesn't work.

[Norm]

Where is the title originally(the first time) set for tab?
That is what I mean by the original value.

tab.getTitleAt(tab.getSelectedIndex());
gets the current value, not the original value.

[keffie91]

that is Untitled always. Because you begin always with a tab that has no name and is not saved. So if I write out the orginal text thus Untitled. Than you don't see the name of the document if you have saved it. End that is not what I want.

[Norm]

What is returned the first time you do a getTitleAt()?
Is it an empty string? Or what?

[keffie91]

The name of the saved file without the * character

[Norm]

And how does that string get to be the title? How is it set? Via the add or via a setTitle? Whenever or whereever you FIRST set the title save that string as the original value of the title.