Attachment 283813 Details for Bug 565883 – Snippet with large scroll steps in Canvas

Snippet with large scroll steps in Canvas

ScrollTest.java (text/plain), 1.43 KB, created by Thomas Singer

on 2020-08-07 06:17:37 EDT

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Creator: Thomas Singer

Created: 2020-08-07 06:17:37 EDT

Size: 1.43 KB

patch

obsolete

>import org.eclipse.swt.*;
>import org.eclipse.swt.graphics.*;
>import org.eclipse.swt.layout.*;
>import org.eclipse.swt.widgets.*;
>
>/**
> * @author Thomas Singer
> */
>public class ScrollTest {
>
>	public static void main(String[] args) {
>		final Display display = new Display();
>
>		final Shell shell = new Shell(display);
>		shell.setLayout(new FillLayout());
>
>		final Composite composite = new Composite(shell, SWT.DOUBLE_BUFFERED | SWT.V_SCROLL);
>		final ScrollBar verticalBar = composite.getVerticalBar();
>		verticalBar.setValues(420, 0, 1002, 24, 1, 24);
>
>		composite.addListener(SWT.Paint, event -> {
>			int selection = verticalBar.getSelection();
>			final Rectangle bounds = composite.getBounds();
>			final int rowHeight = event.gc.getFontMetrics().getHeight();
>			while (bounds.height > 0) {
>				event.gc.drawString(Integer.toString(selection++), bounds.x, bounds.y);
>				bounds.y += rowHeight;
>				bounds.height -= rowHeight;
>			}
>		});
>
>		verticalBar.addListener(SWT.Selection, event -> composite.redraw());
>
>		final Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL | SWT.VIRTUAL);
>		table.addListener(SWT.SetData, event -> ((Item)event.item).setText("Row " + event.index));
>		table.setItemCount(1002);
>		table.setSelection(420);
>
>		shell.setSize(500, 400);
>		shell.open();
>
>		while (!shell.isDisposed()) {
>			if (!display.readAndDispatch()) {
>				display.sleep();
>			}
>		}
>
>		display.dispose();
>	}
>}

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Attachments on bug 565883: 283811 | 283812 | 283813