FontUtils.java

/*******************************************************************************
 * Copyright (c) 2012 Martin Reiterer.
 * 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
 *
 * @author Martin Reiterer
 * @author Christian Behon
 * @author Pascal Essiembre
 *
 * @since 0.0.1
 ******************************************************************************/
package org.eclipselabs.e4.tapiji.utils;


import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;


public final class FontUtils {

    private FontUtils() {
        // Only static access
    }


    /**
     * Creates a font by altering the font associated with the given control and applying the provided style (size is
     * unaffected).
     *
     * @param control control we base our font data on
     * @param style style to apply to the new font
     * @return newly created font
     */
    public static Font createFont(final Control control, final int style) {
        return createFont(control, style, 0);
    }

    /**
     * Creates a font by altering the font associated with the given control and applying the provided style and
     * relative
     * size.
     *
     * @param control control we base our font data on
     * @param style style to apply to the new font
     * @param relSize size to add or remove from the control size
     * @return newly created font
     */
    public static Font createFont(final Control control, final int style, final int relSize) {
        // TODO consider dropping in favor of control-less version?
        final FontData[] fontData = control.getFont().getFontData();
        for (final FontData element : fontData) {
            element.setHeight(element.getHeight() + relSize);
            element.setStyle(style);
        }
        return new Font(control.getDisplay(), fontData);
    }

    /**
     * Creates a font by altering the system font and applying the provided style and relative size.
     *
     * @param style style to apply to the new font
     * @return newly created font
     */
    public static Font createFont(final int style) {
        return createFont(style, 0);
    }

    /**
     * Creates a font by altering the system font and applying the provided style and relative size.
     *
     * @param style style to apply to the new font
     * @param relSize size to add or remove from the control size
     * @return newly created font
     */
    public static Font createFont(final int style, final int relSize) {
        final Display display = Display.getCurrent();
        final FontData[] fontData = display.getSystemFont().getFontData();
        for (final FontData element : fontData) {
            element.setHeight(element.getHeight() + relSize);
            element.setStyle(style);
        }
        return new Font(display, fontData);
    }
}