Attachment 274967 Details for Bug 127132 – Sample to reproduce the NPE

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Sample to reproduce the NPE

VirtualOwnerDrawnTable.java (text/plain), 3.28 KB, created by Thomas Singer

on 2018-07-13 06:25:05 EDT

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Description:

Filename:

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Creator: Thomas Singer

Created: 2018-07-13 06:25:05 EDT

Size: 3.28 KB

patch

obsolete

>import org.eclipse.swt.*;
>import org.eclipse.swt.events.*;
>import org.eclipse.swt.graphics.*;
>import org.eclipse.swt.layout.*;
>import org.eclipse.swt.widgets.*;
>
>/**
> * @author Thomas Singer
> */
>public class VirtualOwnerDrawnTable {
>
>	// Constants ==============================================================
>
>	static final int COUNT1 = 1000;
>	static final int COUNT2 = 100;
>
>	private static boolean packPending = true;
>
>	// Static =================================================================
>
>	public static void main(String[] args) {
>		final Display display = new Display();
>		final Shell shell = new Shell(display);
>		shell.setLayout(new FillLayout(SWT.VERTICAL));
>
>		final Button button = new Button(shell, SWT.NONE);
>		final Table table = new Table(shell, SWT.VIRTUAL | SWT.BORDER | SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL);
>		button.setText("Change content");
>		button.addSelectionListener(new SelectionAdapter() {
>			@Override
>			public void widgetSelected(SelectionEvent e) {
>				table.setItemCount(table.getItemCount() == COUNT1 ? COUNT2 : COUNT1);
>			}
>		});
>
>		table.setHeaderVisible(true);
>		final Listener listener = new Listener() {
>			@Override
>			public void handleEvent(Event event) {
>				final TableItem item = (TableItem)event.item;
>				if (event.type == SWT.EraseItem) {
>					if (event.index < 2) {
>						event.detail &= ~SWT.FOREGROUND;
>					}
>				}
>				else if (event.type == SWT.PaintItem) {
>					if (event.index == 0) {
>						event.gc.drawText((String)item.getData(), event.x, event.y, true);
>					}
>					else if (event.index == 1) {
>						final String text = (String)item.getData();
>						final Point size = event.gc.textExtent(text);
>						final Rectangle bounds = item.getBounds(event.index);
>						event.gc.drawText(text, bounds.x + bounds.width - size.x, bounds.y + bounds.height - size.y, true);
>					}
>				}
>				else if (event.type == SWT.MeasureItem) {
>					final String text = (String)item.getData();
>					final Point point = event.gc.textExtent(text);
>					event.height = point.y * 2;
>					event.width = Math.max(event.width, point.x);
>				}
>				else if (event.type == SWT.SetData) {
>					final int index = table.indexOf(item);
>					final String data = "Item " + index;
>					item.setText(2, data);
>					item.setData(data);
>
>					if (packPending) {
>						packPending = false;
>						display.asyncExec(new Runnable() {
>							@Override
>							public void run() {
>								table.setRedraw(false);
>								for (TableColumn column : table.getColumns()) {
>									column.pack();
>								}
>								table.setRedraw(true);
>							}
>						});
>					}
>				}
>			}
>		};
>		table.addListener(SWT.EraseItem, listener);
>		table.addListener(SWT.SetData, listener);
>		table.addListener(SWT.MeasureItem, listener);
>		table.addListener(SWT.PaintItem, listener);
>
>		createColumn(SWT.LEFT, "OD Left", table);
>		createColumn(SWT.RIGHT, "OD Right", table);
>		createColumn(SWT.LEFT, "Primitive", table);
>
>		table.setItemCount(COUNT1);
>		table.setTopIndex(50000);
>
>		shell.setSize(400, 500);
>		shell.open();
>		while (!shell.isDisposed()) {
>			if (!display.readAndDispatch()) {
>				display.sleep();
>			}
>		}
>		display.dispose();
>	}
>
>	private static void createColumn(int style, String text, Table table) {
>		final TableColumn tableColumn = new TableColumn(table, style);
>		tableColumn.setText(text);
>		tableColumn.setMoveable(true);
>	}
>}

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Attachments on bug 127132: 274967