Java Tutorial/SWT/ScrollBar
Introducing ScrollBar
- You don"t create ScrollBars directly.
- You can retrieve a reference to the ScrollBar by calling getHorizontalBar() or getVerticalBar().
Scrollable Styles:
StyleDescriptionSWT.H_SCROLLCreates a horizontal ScrollBar (passes the SWT.HORIZONTAL style to ScrollBar"s constructor)SWT.V_SCROLLCreates a vertical ScrollBar (passes the SWT.VERTICAL style to ScrollBar"s constructor)
Show the selection value by using ScrollBar
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; 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 ScrollBarSelectionValue {
public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout());
// Create a List with a vertical ScrollBar List list = new List(shell, SWT.V_SCROLL); // Add a bunch of items to it for (int i = 0; i < 500; i++) { list.add("A list item"); } // Get the ScrollBar ScrollBar sb = list.getVerticalBar(); // Show the selection value System.out.println("Selection: " + sb.getSelection()); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); }
}</source>