[news.eclipse.platform.swt] Re: Multi-line Text with constant number of

["Martin Smithson" <msmiths@xxxxxxxxxx>]

Veronika,

Many thanks... it now works great.  It's not immediately obvious from the
docs that Layouts and setSize() or setBounds() methods are mutually
exclusive.


"Veronika Irvine" <veronika_irvine@xxxxxxx> wrote in message
news:d04vaf$or2$1@xxxxxxxxxxxxxxxxxx
> You probably have a Layout on the shell and this is overriding the result
of
> payloadWindow.setSize(payloadWindow.computeSize(width, height));  You can
> not mix a Layout with calls to setSize() or setBounds() - you must choose
> one or the other.  Below is an example using GridLayout that sets the size
> of the Text widget:
>
> public static void main (String [] args) {
>         Display display = new Display ();
>         Shell shell = new Shell (display);
>         shell.setLayout(new GridLayout(2, false));
>         Text payloadWindow = new Text(shell, SWT.BORDER | SWT.MULTI
> |SWT.V_SCROLL | SWT.H_SCROLL);
>         GC gc = new GC(payloadWindow);
>         FontMetrics fm = gc.getFontMetrics ();
>         gc.dispose ();
>         int cols = 80;
>         int rows = 10;
>         int width = cols * fm.getAverageCharWidth();
>         int height = rows * fm.getHeight();
>         GridData data = new GridData();
>         data.widthHint = width;
>         data.heightHint = height;
>         payloadWindow.setLayoutData(data);
>         Button b = new Button(shell, SWT.PUSH);
>         b.setText("Button");
>         shell.pack();
>         shell.open ();
>         while (!shell.isDisposed ()) {
>                 if (!display.readAndDispatch ()) display.sleep ();
>         }
>         display.dispose ();
> }
>
> "Martin Smithson" <msmiths@xxxxxxxxxx> wrote in message
> news:d04nif$ed3$1@xxxxxxxxxxxxxxxxxx
> > Hi,
> >
> > I am trying to emulate the behaviour that can be achieved in SWING by
> > using
> > a JTextArea and a JScrollPane together, as follows:
> >
> >    JTextArea payloadWindow = new JTextArea();
> >    payloadWindow.setRows(10);
> >    payloadWindow.setColumns(80);
> >
> >    JScrollPane payloadWindowScrollPane = new JScrollPane();
> >    payloadWindowScrollPane.setViewportView(payloadWindow);
> >    payloadWindowScrollPane.setMinimumSize(new Dimension(400, 400));
> >
> > However, I cannot find any way to tell a Text control to size itself to
a
> > given number of displayable rows and columns.  I have code similar to
the
> > following:
> >
> >    int cols = 80;
> >    int rows = 10;
> >    GC gc = new GC(payloadWindow);
> >    FontMetrics fm = gc.getFontMetrics ();
> >    int width = cols * fm.getAverageCharWidth();
> >    int height = rows * fm.getHeight ();
> >    gc.dispose ();
> >    payloadWindow.setSize(payloadWindow.computeSize(width, height));
> >
> > The problem with this is that the Text control is initially empty.
> > Therefore, when I invoke pack() on my dialog, the control gets resized
> > smaller.  Also, if add extra lines of text (>10) and then pack() is
> > invoked
> > on the dialog, my Text control gets resized larger then 10 rows.
> >
> > The behaviour that I would like to see is to always have 10 rows by 80
> > columns, even when the Text control is empty or contains a large amount
of
> > text, and I would like to have scroll bars displayed for the Text
control
> > when they are required, i.e., when more than 10 rows are entered or a
line
> > longer than 80 characters is entered.
> >
> > Any ideas?
> >
> > P.S.  I have tried to place the Text control inside a ScrolledPane, but
> > still cannot achieve the desired results.
> >
> >
>
>