| /******************************************************************************* |
| * Copyright (c) 2018 Red Hat and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Red Hat - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.tests.gtk.snippets; |
| |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.graphics.Rectangle; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.*; |
| |
| /** |
| * @author Thomas Singer |
| */ |
| public class Bug509503_VirtualTableCalculate { |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| final Shell shell = new Shell(display, SWT.NO_FOCUS | SWT.ON_TOP); |
| shell.setLayout(new FillLayout()); |
| |
| final Table table = new Table(shell, SWT.VIRTUAL | SWT.V_SCROLL); |
| |
| final TableColumn tableColumn = new TableColumn(table, SWT.LEFT); |
| tableColumn.setText("Column"); |
| |
| final Listener listener = new Listener() { |
| @Override |
| public void handleEvent(Event event) { |
| if (event.type == SWT.MeasureItem) { |
| final Point size = event.gc.stringExtent(getText(event)); |
| event.width = size.x; |
| event.height = size.y; |
| } else if (event.type == SWT.PaintItem) { |
| event.gc.drawString(getText(event), event.x, event.y); |
| } else if (event.type == SWT.SetData) { |
| event.item.setData("Row " + event.index); |
| } else if (event.type == SWT.MouseDown) { |
| if (event.button == 3) { |
| shell.dispose(); |
| } |
| } |
| } |
| |
| private String getText(Event event) { |
| return String.valueOf(event.item.getData()); |
| } |
| }; |
| table.addListener(SWT.SetData, listener); |
| table.addListener(SWT.MeasureItem, listener); |
| table.addListener(SWT.PaintItem, listener); |
| table.addListener(SWT.MouseDown, listener); |
| table.setItemCount(20); |
| table.clearAll(); |
| |
| shell.layout(true, false); |
| |
| tableColumn.pack(); |
| final int width = tableColumn.getWidth(); |
| System.out.println("column width = " + width); |
| |
| final int max = Math.min(10, table.getItemCount()); |
| final Rectangle lastRowBounds = table.getItem(max - 1).getBounds(); |
| final Rectangle rectangle = table.computeTrim(0, 0, width, lastRowBounds.y + lastRowBounds.height); |
| |
| final Rectangle shellBounds = shell.computeTrim(0, 0, rectangle.width, rectangle.height); |
| shell.setSize(shellBounds.width, shellBounds.height); |
| |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| display.dispose(); |
| } |
| } |