[news.eclipse.platform.swt] Re: TableColumn pack problem

["Steve Northover" <steve_northover@xxxxxxxxxx>]

https://bugs.eclipse.org/bugs/show_bug.cgi?id=84077

Fixed > 20050131

"Robin Wilson" <robinwilson@xxxxxxx> wrote in message
news:cteq3a$v3n$1@xxxxxxxxxxxxxxxxxx
> The workaround is to create a dummy column, set the width to 0 and set
> resizable to false.
>
>      colLast.setWidth(0);
>      colLast.setResizable(false);
>
> This stops the growing problem but you still have the extra space from
> the vertical and horizontal scrollbars that aren't shown. I tried
> setting their visibility but the method call had no effect.
>
> As I looked through SWT and JFace by Rob Warner and Robert Harris, I
> noticed this bug is visible in Figure 8-21 and 8-22.
>
> If there was a way to intercept the shell layout call, the size could
> modified to remove the thickness of the scrollbars.
>
> Best regards,
> Robin
>
>
>
> Robin Wilson wrote:
> > I can probably find a workaround so I'm not dead at all. This is my
> > first adventure with SWT so I'm really just trying to find out if my
> > assumptions are wrong or this is a bug.
> >
> > Correct behaviour or not, if reasonable usage of the API produces
> > unexpected results, then it is either a documentation bug, a design
> > error, or a code bug. Any way you characterize it, it's still a bug to
> > the SWT user. From your description it sure sounds like a bug to me. No
> > big deal, bugs happen.
> >
> > I appreciate your investigation of the problem. If I can find a
> > workaround I'll post it here.
> >
> > Best regards,
> > Robin
> >
> >
> >
> >
> >
> >
> >
> >
> > Steve Northover wrote:
> >
> >> Sigh.  I've gotten to the bottom of it and have yet to decide whether
> >> it is
> >> an SWT bug or the correct (unwanted) behavior.  The problem is that
> >> Column.pack() for the last column is not taking into account the space
> >> for
> >> the scroll bar.  When you call shell.pack(), this eventually makes the
> >> table
> >> grow the extra space for the scroll bar ... and so on.  How dead are
you?
> >> It may be a while until I get to this again.
> >>
> >> "Robin Wilson" <robinwilson@xxxxxxx> wrote in message
> >> news:ctbb1v$o1u$1@xxxxxxxxxxxxxxxxxx
> >>
> >>> I haven't heard from anyone yet on this. Is it a SWT bug or am I doing
> >>> something wrong?
> >>>
> >>> Best regards,
> >>> Robin
> >>>
> >>>
> >>> Robin Wilson wrote:
> >>>
> >>>> I'm using Eclipse Version: 3.0.0 on Windows XP. This snippet
> >>>> illustrates
> >>>> another problem I'm having. The first time the table is shown, there
is
> >>>> extra space after the last column that looks like it's wide enough
> >>>> for a
> >>>> scroll bar. Then as you press the button, the last column grows
> >>
> >>
> >> everytime.
> >>
> >>>> Here's my snippet:
> >>>>
> >>>> /*
> >>>> * Created on Jan 24, 2005 by Robin Wilson
> >>>> */
> >>>>
> >>>> import org.eclipse.swt.SWT;
> >>>> import org.eclipse.swt.events.SelectionAdapter;
> >>>> import org.eclipse.swt.events.SelectionEvent;
> >>>> import org.eclipse.swt.layout.GridLayout;
> >>>> import org.eclipse.swt.widgets.Button;
> >>>> import org.eclipse.swt.widgets.Display;
> >>>> import org.eclipse.swt.widgets.Shell;
> >>>> import org.eclipse.swt.widgets.Table;
> >>>> import org.eclipse.swt.widgets.TableColumn;
> >>>> import org.eclipse.swt.widgets.TableItem;
> >>>>
> >>>> public class TableColumnProblemExample {
> >>>>    public static void main(String[] args) {
> >>>>        Display display = new Display();
> >>>>        final Shell shell = new Shell(display);
> >>>>        shell.setText("Table Column Pack");
> >>>>        GridLayout vertical = new GridLayout();
> >>>>        vertical.numColumns = 1;
> >>>>        shell.setLayout(vertical);
> >>>>        final Table table = new Table(shell, SWT.SINGLE);
> >>>>        table.setHeaderVisible(true);
> >>>>        table.setLinesVisible(true);
> >>>>        final TableColumn col1 = new TableColumn(table,SWT.CENTER);
> >>>>        col1.setText("Column 1");
> >>>>        final TableColumn col2 = new TableColumn(table,SWT.CENTER);
> >>>>        col2.setText("Column 2");
> >>>>        col1.pack();
> >>>>        col2.pack();
> >>>>        Button button = new Button(shell, SWT.PUSH);
> >>>>        button.setText("Fill Data");
> >>>>        button.addSelectionListener( new SelectionAdapter() {
> >>>>            public void widgetSelected(SelectionEvent event) {
> >>>>                //table.layout(true);
> >>>>                table.setRedraw(false);
> >>>>                table.removeAll();
> >>>>                String [] data1 = { "1", "2" };
> >>>>                String [] data2 = { "3", "4" };
> >>>>                TableItem item1 = new TableItem(table, SWT.NONE);
> >>>>                item1.setText( data1 );
> >>>>                TableItem item2 = new TableItem(table, SWT.NONE);
> >>>>                item2.setText( data2 );
> >>>>                col1.pack();
> >>>>                col2.pack();
> >>>>                shell.pack();
> >>>>                table.setRedraw(true);
> >>>>            }
> >>>>        });
> >>>>
> >>>>        shell.pack();
> >>>>        shell.open();
> >>>>        while (!shell.isDisposed()) {
> >>>>            if (!display.readAndDispatch())
> >>>>                display.sleep();
> >>>>        }
> >>>>    }
> >>>> }
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> Steve Northover wrote:
> >>>>
> >>>>
> >>>>> 1) Which platform?
> >>>>> 2) Post a stand alone snippet that shows the problem.
> >>>>>
> >>>>> "Robin Wilson" <robinwilson@xxxxxxx> wrote in message
> >>>>> news:cstmik$116$1@xxxxxxxxxxxxxxxxxx
> >>>>>
> >>>>>
> >>>>>> The first time I create my table and pack all the columns it looks
> >>>>>> great.
> >>>>>> After, I change the contents and call pack on each column again the
> >>
> >>
> >> last
> >>
> >>>>>> column expands. I'm sure I must be doing something wrong. Can
someone
> >>>>>
> >>>>>
> >>>>>
> >>>>> please
> >>>>>
> >>>>>
> >>>>>> give me a hint or point me to a tutorial on tables? I've been
> >>
> >>
> >> searching
> >>
> >>>>>
> >>>>> and
> >>>>>
> >>>>>
> >>>>>> searching but with no luck so far.
> >>>>>>
> >>>>>> Thanks!
> >>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>>
> >>
> >>