org.eclipse.swt.snippets.Snippet332.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet332.java

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/*******************************************************************************
 * 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;

/*
 * SWT StyledText and Combo snippet: using BidiSegmentListener and
 * SegmentListener to implement custom bidi segments, such as right-to-left
 * override
 *
 * Note that SegmentListener in the Combo widget is supported since 4.4 and
 * currently only on win32 platform
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.6
 */
import org.eclipse.swt.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet332 {

    public static void main(String[] args) {
        final Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 332");
        GridLayout layout = new GridLayout();
        layout.marginHeight = layout.marginWidth = 10;
        shell.setLayout(layout);
        StyledText text = new StyledText(shell, SWT.MULTI | SWT.BORDER);
        final String segment = "Eclipse";
        String string = "Force RTL direction on this segment \"" + segment + "\".";
        text.setText(string);
        int[] segments = { string.indexOf(segment), segment.length() };
        StyleRange[] ranges = { new StyleRange(0, 0, display.getSystemColor(SWT.COLOR_RED), null) };
        text.setStyleRanges(segments, ranges);
        Font font = new Font(display, "Tahoma", 16, 0);
        text.setFont(font);
        text.addBidiSegmentListener(event -> {
            String string1 = event.lineText;
            int start = string1.indexOf(segment);
            event.segments = new int[] { start, start + segment.length() };
            event.segmentsChars = new char[] { '\u202e', '\u202C' };
        });
        Combo combo = new Combo(shell, SWT.SIMPLE);
        combo.setFont(font);
        combo.setBackground(display.getSystemColor(SWT.COLOR_YELLOW));
        combo.setItems("Option 1...", "Option 2...", "Option 3...", "Option 4...");
        combo.select(1);
        combo.addSegmentListener(event -> {
            event.segments = new int[] { 0, event.lineText.length() };
            event.segmentsChars = new char[] { '\u202e', '\u202c' };
        });
        shell.setSize(500, 250);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        font.dispose();
        display.dispose();
    }
}