| /******************************************************************************* |
| * Copyright (c) 2000, 2016 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Table example snippet: draw multiple lines of text in a table item |
| * |
| * For a detailed explanation of this snippet see |
| * http://www.eclipse.org/articles/Article-CustomDrawingTableAndTreeItems/customDraw.htm#_example6 |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.2 |
| */ |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet231 { |
| |
| public static void main(String [] args) { |
| final int COLUMN_COUNT = 4; |
| final int ITEM_COUNT = 8; |
| final int TEXT_MARGIN = 3; |
| Display display = new Display(); |
| Shell shell = new Shell(display); |
| final Table table = new Table(shell, SWT.FULL_SELECTION); |
| table.setHeaderVisible(true); |
| table.setLinesVisible(true); |
| for (int i = 0; i < COLUMN_COUNT; i++) { |
| new TableColumn(table, SWT.NONE); |
| } |
| for (int i = 0; i < ITEM_COUNT; i++) { |
| TableItem item = new TableItem(table, SWT.NONE); |
| for (int j = 0; j < COLUMN_COUNT; j++) { |
| String string = "item " + i + " col " + j; |
| if ((i + j) % 3 == 1) { |
| string +="\nnew line1"; |
| } |
| if ((i + j) % 3 == 2) { |
| string +="\nnew line1\nnew line2"; |
| } |
| item.setText(j, string); |
| } |
| } |
| |
| /* |
| * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. |
| * Therefore, it is critical for performance that these methods be |
| * as efficient as possible. |
| */ |
| table.addListener(SWT.MeasureItem, event -> { |
| TableItem item = (TableItem)event.item; |
| String text = item.getText(event.index); |
| Point size = event.gc.textExtent(text); |
| event.width = size.x + 2 * TEXT_MARGIN; |
| event.height = Math.max(event.height, size.y + TEXT_MARGIN); |
| }); |
| table.addListener(SWT.EraseItem, event -> event.detail &= ~SWT.FOREGROUND); |
| table.addListener(SWT.PaintItem, event -> { |
| TableItem item = (TableItem)event.item; |
| String text = item.getText(event.index); |
| /* center column 1 vertically */ |
| int yOffset = 0; |
| if (event.index == 1) { |
| Point size = event.gc.textExtent(text); |
| yOffset = Math.max(0, (event.height - size.y) / 2); |
| } |
| event.gc.drawText(text, event.x + TEXT_MARGIN, event.y + yOffset, true); |
| }); |
| |
| for (int i = 0; i < COLUMN_COUNT; i++) { |
| table.getColumn(i).pack(); |
| } |
| table.pack(); |
| shell.pack(); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) display.sleep(); |
| } |
| display.dispose(); |
| } |
| } |