Attachment 277856 Details for Bug 531048 – Bug snippet reproducing the issue in Tree

Bug snippet reproducing the issue in Tree

Bug531048_VirtualTreeCheese.java (text/x-java), 4.33 KB, created by Eric Williams

on 2019-03-13 15:51:00 EDT

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Creator: Eric Williams

Created: 2019-03-13 15:51:00 EDT

Size: 4.33 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2019 Red Hat and others. All rights reserved.
> * The contents of this file are made available under the terms
> * of the GNU Lesser General Public License (LGPL) Version 2.1 that
> * accompanies this distribution (lgpl-v21.txt).  The LGPL is also
> * available at http://www.gnu.org/licenses/lgpl.html.  If the version
> * of the LGPL at http://www.gnu.org is different to the version of
> * the LGPL accompanying this distribution and there is any conflict
> * between the two license versions, the terms of the LGPL accompanying
> * this distribution shall govern.
> *
> * Contributors:
> *     Red Hat - initial API and implementation
> *******************************************************************************/
>package org.eclipse.swt.tests.gtk.snippets;
>
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.SelectionAdapter;
>import org.eclipse.swt.events.SelectionEvent;
>import org.eclipse.swt.graphics.Point;
>import org.eclipse.swt.graphics.Rectangle;
>import org.eclipse.swt.layout.FillLayout;
>import org.eclipse.swt.widgets.Button;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Listener;
>import org.eclipse.swt.widgets.Shell;
>import org.eclipse.swt.widgets.Tree;
>import org.eclipse.swt.widgets.TreeColumn;
>import org.eclipse.swt.widgets.TreeItem;
>
>/**
> * @author Thomas Singer
> */
>public class Bug531048_VirtualTreeCheese {
>
>	// Constants ==============================================================
>
>	static final int COUNT1 = 10000;
>	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 Tree table = new Tree(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 = event -> {
>			final TreeItem item = (TreeItem)event.item;
>			if (event.type == SWT.EraseItem) {
>				if (event.index < 2) {
>					event.detail &= ~SWT.FOREGROUND;
>				}
>			}
>			else if (event.type == SWT.PaintItem) {
>				final String text1 = (String)item.getData();
>				if (event.index == 0) {
>					event.gc.drawText(text1, event.x, event.y, true);
>				}
>				else if (event.index == 1) {
>					final Point size = event.gc.textExtent(text1);
>					final Rectangle bounds = item.getBounds(event.index);
>					event.gc.drawText(text1, bounds.x + bounds.width - size.x, bounds.y + bounds.height - size.y, true);
>				}
>			}
>			else if (event.type == SWT.MeasureItem) {
>				final String text2 = (String)item.getData();
>				final Point point = event.gc.textExtent(text2);
>				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(() -> {
>						table.setRedraw(false);
>						for (TreeColumn 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);
>		TreeItem topItem = table.getItem(0);
>		table.setTopItem(topItem);
>
>		shell.setSize(400, 500);
>		shell.open();
>
>		while (!shell.isDisposed()) {
>			if (!display.readAndDispatch()) {
>				display.sleep();
>			}
>		}
>		display.dispose();
>	}
>
>	private static void createColumn(int style, String text, Tree table) {
>		final TreeColumn tableColumn = new TreeColumn(table, style);
>		tableColumn.setText(text);
>		tableColumn.setMoveable(true);
>	}
>}

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Attachments on bug 531048: 272645 | 272647 | 272648 | 272649 | 272650 | 272838 | 277856