org.eclipse.swt.snippets.Snippet236.java Source code

Introduction

Here is the source code for org.eclipse.swt.snippets.Snippet236.java

Source

/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;
/*
 * Table example snippet: draw different foreground colors for text in a TableItem.
 *
 * For more info on custom-drawing TableItem and TreeItem content see
 * http://www.eclipse.org/articles/article.php?file=Article-CustomDrawingTableAndTreeItems/index.html
 *
 * 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.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet236 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Table: Change style multiple times in cell");
        shell.setLayout(new FillLayout());
        Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
        table.setLinesVisible(true);
        for (int i = 0; i < 10; i++) {
            new TableItem(table, SWT.NONE);
        }
        final TextLayout textLayout = new TextLayout(display);
        textLayout.setText("SWT: Standard Widget Toolkit");
        Font font1 = new Font(display, "Tahoma", 14, SWT.BOLD);
        Font font2 = new Font(display, "Tahoma", 10, SWT.NORMAL);
        Font font3 = new Font(display, "Tahoma", 14, SWT.ITALIC);
        TextStyle style1 = new TextStyle(font1, display.getSystemColor(SWT.COLOR_BLUE), null);
        TextStyle style2 = new TextStyle(font2, display.getSystemColor(SWT.COLOR_MAGENTA), null);
        TextStyle style3 = new TextStyle(font3, display.getSystemColor(SWT.COLOR_RED), null);
        textLayout.setStyle(style1, 0, 0);
        textLayout.setStyle(style1, 5, 12);
        textLayout.setStyle(style2, 1, 1);
        textLayout.setStyle(style2, 14, 19);
        textLayout.setStyle(style3, 2, 2);
        textLayout.setStyle(style3, 21, 27);

        /*
         * 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.PaintItem, event -> textLayout.draw(event.gc, event.x, event.y));
        final Rectangle textLayoutBounds = textLayout.getBounds();
        table.addListener(SWT.MeasureItem, e -> {
            e.width = textLayoutBounds.width + 2;
            e.height = textLayoutBounds.height + 2;
        });
        shell.setSize(400, 200);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        font1.dispose();
        font2.dispose();
        font3.dispose();
        textLayout.dispose();
        display.dispose();
    }
}