A simple Question about JFace action

[kabbesy]

This question maybe quite simple ,but I'm really a new man to SWT&Jface.

I am a beginner to swt&Jface by some tutorial ebooks.
what i have read about the Jface action is all coded like :

Code: Select all

import org.eclipse.jface.action.*;
import org.eclipse.jface.window.*;

public class ExitAction extends Action
{
  ApplicationWindow window;

  public ExitAction(ApplicationWindow w)
  {
    window = w;
    setText("E&xit");
  }

  public void run()
  {
    window.close();
  }
}



but all the actions which are generated by Designer seems like:

Code: Select all

    private Action exit;
    private void createActions() {
        exit = new Action("&Exit") {
            public void run() {
                System.exit(1);
            }
        };
    }


Though it is a very simple and convenience way to control the action itself . But ,how can make the ACTION control/access other widget component in such a createAction method ? Example, I want to change one Label's text on the shell before the System.exit ??
To declare another reference of the class itself ? And access it's component in a SWT way ?

PS:My english is so poor that I even can not describe my simple question in such a correct sentence.

thanks a lot [/code]

[Eric Clayberg]

all the actions which are generated by Designer seems like

Note that you can use Designer to create new actions or you can select existing Action classes.

Though it is a very simple and convenience way to control the action itself . But ,how can make the ACTION control/access other widget component in such a createAction method ? Example, I want to change one Label's text on the shell before the System.exit ?

Why not just make the label widget a field and reference it directly or through an accessor?

[Slot Head]

There's a rally cool way to make the widget into a field.

Right click on the variable name of it in the code,
select Refactor,
find it in the context menu-- I think it's ctrl+shft+F

[Eric Clayberg]

There's a rally cool way to make the widget into a field. Right click on the variable name of it in the code,
select Refactor, find it in the context menu-- I think it's ctrl+shft+F

An even faster way to do this from Designer's design view is to click on the Convert local to field button .

If you want to convert multiple widgets into fields all at once, you can also use Designer's new (in v4.1.0) multi widget Rename or convert dialog:

.