org.eclipse.swt.snippets.Snippet222.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet222.java

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/*******************************************************************************
 * Copyright (c) 2000, 2018 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;
/*
 * example snippet: StyledText bulleted list example
 *
 * 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.custom.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet222 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("StyledText Bullet Example");
        shell.setLayout(new FillLayout());
        final StyledText styledText = new StyledText(shell,
                SWT.FULL_SELECTION | SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
        StringBuilder text = new StringBuilder();
        text.append("Here is StyledText with some bulleted lists:\n\n");
        for (int i = 0; i < 4; i++)
            text.append("Red Bullet List Item " + i + "\n");
        text.append("\n");
        for (int i = 0; i < 2; i++)
            text.append("Numbered List Item " + i + "\n");
        for (int i = 0; i < 4; i++)
            text.append("Sub List Item " + i + "\n");
        for (int i = 0; i < 2; i++)
            text.append("Numbered List Item " + (2 + i) + "\n");
        text.append("\n");
        for (int i = 0; i < 4; i++)
            text.append("Custom Draw List Item " + i + "\n");
        styledText.setText(text.toString());

        StyleRange style0 = new StyleRange();
        style0.metrics = new GlyphMetrics(0, 0, 40);
        style0.foreground = display.getSystemColor(SWT.COLOR_RED);
        Bullet bullet0 = new Bullet(style0);
        StyleRange style1 = new StyleRange();
        style1.metrics = new GlyphMetrics(0, 0, 50);
        style1.foreground = display.getSystemColor(SWT.COLOR_BLUE);
        Bullet bullet1 = new Bullet(ST.BULLET_NUMBER | ST.BULLET_TEXT, style1);
        bullet1.text = ".";
        StyleRange style2 = new StyleRange();
        style2.metrics = new GlyphMetrics(0, 0, 80);
        style2.foreground = display.getSystemColor(SWT.COLOR_GREEN);
        Bullet bullet2 = new Bullet(ST.BULLET_TEXT, style2);
        bullet2.text = "\u2713";
        StyleRange style3 = new StyleRange();
        style3.metrics = new GlyphMetrics(0, 0, 50);
        Bullet bullet3 = new Bullet(ST.BULLET_CUSTOM, style2);

        styledText.setLineBullet(2, 4, bullet0);
        styledText.setLineBullet(7, 2, bullet1);
        styledText.setLineBullet(9, 4, bullet2);
        styledText.setLineBullet(13, 2, bullet1);
        styledText.setLineBullet(16, 4, bullet3);

        styledText.addPaintObjectListener(event -> {
            Display display1 = event.display;
            StyleRange style = event.style;
            Font font = style.font;
            if (font == null)
                font = styledText.getFont();
            TextLayout layout = new TextLayout(display1);
            layout.setAscent(event.ascent);
            layout.setDescent(event.descent);
            layout.setFont(font);
            layout.setText("\u2023 1." + event.bulletIndex + ")");
            layout.draw(event.gc, event.x + 10, event.y);
            layout.dispose();
        });
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}