org.eclipse.swt.snippets.Snippet369.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet369.java

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/**
 *  Copyright (c) 2017 Angelo ZERR.
 *
 *  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:
 *  Angelo Zerr <angelo.zerr@gmail.com> - Customize different line spacing of StyledText - Bug 522020
 */
package org.eclipse.swt.snippets;

/*
 * example snippet: line spacing provider in action
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.107
 */
import org.eclipse.swt.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet369 {

    public static void main(String[] args) throws Exception {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 369");
        shell.setLayout(new FillLayout());
        shell.setText("Line spacing provider in action");

        StyledText text = new StyledText(shell, SWT.BORDER | SWT.V_SCROLL);
        text.setText("// Type your custom line spacing \n10\n5\nabcd\n20\nefgh");

        text.setLineSpacingProvider(lineIndex -> {
            String line = text.getLine(lineIndex).trim();
            try {
                return Integer.parseInt(line);
            } catch (NumberFormatException e) {
                return null;
            }
        });

        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}