| /******************************************************************************* |
| * 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.Table; |
| import org.eclipse.swt.widgets.TableColumn; |
| import org.eclipse.swt.widgets.TableItem; |
| |
| /** |
| * @author Thomas Singer |
| */ |
| public class Bug531048_VirtualTableCheese { |
| |
| // 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 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 = 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) { |
| 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 (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(1000); |
| |
| 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); |
| } |
| } |