[news.eclipse.tools] Re: SWT Text problem in Tree in Red Hat Linux

[Grace <gracelo@xxxxxxxxxx>]

Hi Grant,

I took a further look at the code and the text box is actually in a tree.   So
may be it occurs only when it is inside a tree.  Once again, it only occurs
inside Linux.

I am running on WSAD v5 GA and it is not a standalone program.   But I think
you can just create a TreeViewer
and add the following code.

Here is the code I have:

// beginning

// Assume I have a TreeViewer called treeViewer
  Tree tree = treeViewer.getTree();
  TreeEditor treeEditor = new TreeEditor(tree);

  // Use a Composite containing a Label and a Text.  This allows us to edit
just
  // the value, while still showing the variable name.
  composite = new Composite(tree, SWT.NONE);
  composite.setBackground(tree.getBackground());
  GridLayout layout = new GridLayout();
  layout.numColumns = 2;
  layout.marginHeight = 0;
  layout.marginWidth = 0;
  composite.setLayout(layout);

  editorLabel = new Label(composite, SWT.LEFT);
  editorLabel.setLayoutData(new GridData(GridData.FILL_VERTICAL));
  editorText = new Text(composite, SWT.BORDER | SWT.MULTI | SWT.LEFT );
  editorText.setLayoutData(
   new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL));

  // get the value
  String valueString = "someValue";

  TreeItem[] selectedItems = tree.getSelection();
  treeEditor.horizontalAlignment = SWT.LEFT;
  treeEditor.grabHorizontal = true;
  treeEditor.setEditor(composite, selectedItems[0]);

  //get the name
  String varName = "someVariableName";

  editorLabel.setText(varName + "=");
  editorText.setText(valueString);
  editorText.selectAll();

  composite.layout(true);
  composite.setVisible(true);
  editorText.setFocus();

  // CR means commit the change, ESC means abort changing the value
  editorText.addKeyListener(new KeyAdapter() {
   public void keyReleased(KeyEvent event) {
     // ... some actions
   }
  });

  // If the focus is lost, then act as if user hit CR and commit change
  editorText.addFocusListener(new FocusAdapter() {
   public void focusLost(FocusEvent fe) {
        // .. some actions
   }
  });

// end

Thanks,
Grace



Grant Gayed wrote:

> Grace,
>
> I don't see this behaviour in either of the linux/swt implementations, and
> haven't heard of this before.
>
> Are you using an Eclipse build from the current stream or Eclipse 2.0.2?
> And do you have a stand-alone test case that shows the problem?  I tried
> your snippet and it behaved normally, but with all of the elipsed-out
> sections I'm not really running the same thing that you are.
>
> Grant
>
> Grace wrote:
>
> > Hi,
>
> > I wonder if you have seen this problem when running on Red Hat Linux
> > with Gnome.
>
> > I am trying to add a text inside a composite.    It works fine on
> > Windows where the text box can be edited.
> > But on Linux, when the text box is chosen, the values becomes a thick
> > black dash, like "---" and the newly edited text
> > cannot be shown.   Do you have any clues?
>
> > The code is something like this:
>
> >   org.eclipse.swt.widgets.Composite composite = .....;   // set the
> > composite
> >   org.eclipse.swt.widgets.Text editorText = new Text(composite,
> > SWT.BORDER | SWT.SINGLE | SWT.LEFT);
> >   editorText.setLayoutData( new GridData(GridData.FILL_HORIZONTAL |
> > GridData.FILL_VERTICAL));
>
> >   // get the value
> >   String valueString = "someValue";
> > .......
>
> >   editorText.setText(valueString);
> >   editorText.selectAll();
>
> >   composite.layout(true);
> >   composite.setVisible(true);
> >   editorText.setFocus();
>
> >   // events of changing the value
> >   editorText.addKeyListener(new KeyAdapter() {
> >    public void keyReleased(KeyEvent event) {
> >       ......
> >    }
> >   });
>
> >   // If the focus is lost, then do certain things
> >   editorText.addFocusListener(new FocusAdapter() {
> >    public void focusLost(FocusEvent fe) {
> >      .......
> >    }
> >   });
> > ........