[news.eclipse.tools] Re: Scrollable panes for Wizard Pages

["Veronika Irvine" <veronika_irvine@xxxxxxx>]

Are you using ScrolledComposite correctly?

 

Here are some tips:

 

/**

* A ScrolledComposite provides scrollbars and will scroll its content when the user

* uses the scrollbars.

*

*

* <p>There are two ways to use the ScrolledComposite:

*

* <p>

* 1) Set the size of the control that is being scrolled and the ScrolledComposite

* will show scrollbars when the contained control can not be fully seen.

*

* <code><pre>

* public static void main (String [] args) {

*     Display display = new Display ();

*     Color red = display.getSystemColor(SWT.COLOR_RED);

*     Shell shell = new Shell (display);

*     shell.setLayout(new FillLayout());

*     ScrolledComposite sc = new ScrolledComposite(shell, SWT.H_SCROLL | SWT.V_SCROLL);

*     Composite c = new Composite(sc, SWT.NONE);

*     c.setBackground(red);

*     sc.setContent(c);

*     GridLayout layout = new GridLayout();

*     layout.numColumns = 5;

*     c.setLayout(layout);

*     for (int i = 0; i < 10; i++) {

*         Button b1 = new Button(c, SWT.PUSH);

*         b1.setText("button "+i);

*     }

*     Point pt = c.computeSize(SWT.DEFAULT, SWT.DEFAULT);

*     c.setSize(pt);

*     shell.open ();

*     while (!shell.isDisposed ()) {

*         if (!display.readAndDispatch ()) display.sleep ();

*     }

*     display.dispose ();

* }

* </pre></code>

*

* 2) The second way imitates the way a browser would work. Set the minimum size of

* the control and the ScrolledComposite will show scroll bars if the visible area is

* less than the minimum size of the control and it will expand the size of the control

* if the visible area is greater than the minimum size. This requires invoking

* both setMinWidth(), setMinHeight() and setExpandHorizontal(), setExpandVertical().

*

* <code><pre>

* public static void main (String [] args) {

*     Display display = new Display ();

*     Color red = display.getSystemColor(SWT.COLOR_RED);

*     Shell shell = new Shell (display);

*     shell.setLayout(new FillLayout());

*     ScrolledComposite sc = new ScrolledComposite(shell, SWT.H_SCROLL | SWT.V_SCROLL);

*     Composite c = new Composite(sc, SWT.NONE);

*     c.setBackground(red);

*     sc.setContent(c);

*     GridLayout layout = new GridLayout();

*     layout.numColumns = 5;

*     c.setLayout(layout);

*     for (int i = 0; i < 10; i++) {

*         Button b1 = new Button(c, SWT.PUSH);

*         b1.setText("button "+i);

*     }

*     Point pt = c.computeSize(SWT.DEFAULT, SWT.DEFAULT);

*     sc.setExpandHorizontal(true);

*     sc.setExpandVertical(true);

*     sc.setMinWidth(pt.x);

*     sc.setMinHeight(pt.y);

*     shell.open ();

*    while (!shell.isDisposed ()) {

*         if (!display.readAndDispatch ()) display.sleep ();

*     }

*     display.dispose ();

* }

* </pre></code>

*

* <dl>

* <dt><b>Styles:</b><dd>H_SCROLL, V_SCROLL

* </dl>

*/