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Is there a way to always show the scrollbar for a List? [message #537264]

Tue, 01 June 2010 17:29

Tony

Messages: 52
Registered: July 2009

Member

I'm using org.eclipse.swt.widgets.List and I want to always show the
scrollbar (disabled if the list doesn't need to be scrolled, enabled if it
does). Is there a way to do this?

Thanks

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Re: Is there a way to always show the scrollbar for a List? [message #537334 is a reply to message #537264]

Wed, 02 June 2010 05:30

Vijay Raj

Messages: 608
Registered: July 2009

Senior Member

package org.eclipse.swt.snippets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.ScrollBar;
import org.eclipse.swt.widgets.Shell;

public class Snippet
{
    static Display display;

    static Shell shell;

    public static void main(String[] args)
    {
        display = new Display();
        shell = new Shell(display);
        shell.setSize(300, 300);
        shell.open();
        shell.setLayout(new GridLayout(5, true));
        List list = new List(shell, SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL);
        GridData layoutData = new GridData(GridData.FILL_BOTH);
        list.setLayoutData(layoutData);
        list.setItems(new String[] { "1", "2", "3" });

        list.addSelectionListener(new SelectionListener()
        {

            @Override
            public void widgetSelected(SelectionEvent e)
            {
                // TODO Auto-generated method stub

            }

            @Override
            public void widgetDefaultSelected(SelectionEvent e)
            {
                System.out.println();

            }
        });
        shell.layout();
        ScrollBar hBar = list.getHorizontalBar();
        if (hBar != null) hBar.setVisible(true);
        ScrollBar vBar = list.getVerticalBar();
        if (vBar != null) vBar.setVisible(true);

        while (!shell.isDisposed())
        {
            if (!display.readAndDispatch()) display.sleep();
        }
        display.dispose();
    }
}

pls modify the code further to sute your needs...

---------------------
why, mr. Anderson, why, why do you persist?
Because I Choose To.
Regards,
Vijay

[Updated on: Wed, 02 June 2010 05:33]

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Re: Is there a way to always show the scrollbar for a List? [message #537881 is a reply to message #537334]

Fri, 04 June 2010 03:13

Tony

Messages: 52
Registered: July 2009

Member

Thank you for your reply. I see that your example does work and that's what
I thought I'd need to do, however something is overriding the value that is
set via the scrollbar visible property. My list is declared within a
org.eclipse.jface.wizard.WizardPage (which is added to an
org.eclipse.jface.wizard.Wizard). Does anyone know how to always show a
list's scrollbars when the list is declared within a JFace WizardPage?

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Re: Is there a way to always show the scrollbar for a List? [message #537885 is a reply to message #537881]

Fri, 04 June 2010 04:55

Vijay Raj

Messages: 608
Registered: July 2009

Senior Member

Notice that the layout is done defore and setting visible is done after...

shell.layout();
        ScrollBar hBar = list.getHorizontalBar();
        if (hBar != null) hBar.setVisible(true);
        ScrollBar vBar = list.getVerticalBar();
        if (vBar != null) vBar.setVisible(true);

if u do it the other way the same thing will happen which is happening to u...

---------------------
why, mr. Anderson, why, why do you persist?
Because I Choose To.
Regards,
Vijay

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