de.thischwa.pmcms.tool.swt.SWTUtils.java Source code

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Here is the source code for de.thischwa.pmcms.tool.swt.SWTUtils.java

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/*******************************************************************************
 * Poor Man's CMS (pmcms) - A very basic CMS generating static html pages.
 * http://poormans.sourceforge.net
 * Copyright (C) 2004-2013 by Thilo Schwarz
 * 
 * == BEGIN LICENSE ==
 * 
 * Licensed under the terms of any of the following licenses at your
 * choice:
 * 
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 * 
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 * 
 * == END LICENSE ==
 ******************************************************************************/
package de.thischwa.pmcms.tool.swt;

import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

import de.thischwa.pmcms.tool.XY;

/**
 * Provides some static SWT helper.
 *
 * @author Thilo Schwarz
 */
public class SWTUtils {

    private static ImageRegistry imageRegistry = new ImageRegistry();

    public static void putImage(String key, URL url) {
        imageRegistry.put(key, ImageDescriptor.createFromURL(url));
    }

    public static Image getImage(String key) {
        return imageRegistry.get(key);
    }

    public static void disposeResources() {
        imageRegistry.dispose();
    }

    public static void changeFontStyle(final Control control, int style) {
        FontData fontData = control.getFont().getFontData()[0];
        control.setFont(new Font(Display.getDefault(), fontData.getName(), fontData.getHeight(), style));
    }

    public static void changeFontSizeRelativ(final Control control, int sizeOffset) {
        FontData fontData = control.getFont().getFontData()[0];
        control.setFont(new Font(Display.getDefault(), fontData.getName(), fontData.getHeight() + sizeOffset,
                fontData.getStyle()));
    }

    public static void changeFontSize(final Control control, int size) {
        FontData fontData = control.getFont().getFontData()[0];
        control.setFont(new Font(Display.getDefault(), fontData.getName(), size, fontData.getStyle()));
    }

    public static void asyncExec(final Thread thread, Display display) {
        if (display != null)
            display.asyncExec(new Runnable() {
                @Override
                public void run() {
                    thread.start();
                }
            });
        else
            thread.start();
    }

    public static void center(final Shell shell, final Rectangle parentBounds) {
        Rectangle currentBounds = shell.getBounds();

        // center of the parent
        Point parentCenter = new Point(parentBounds.x + (parentBounds.width / 2),
                parentBounds.y + (parentBounds.height / 2));

        int newX = parentCenter.x - Math.abs(currentBounds.width / 2);
        int newY = parentCenter.y - Math.abs(currentBounds.height / 2);
        shell.setLocation(newX, newY);
    }

    public static XY convert(Point point) {
        return new XY(point.x, point.y);
    }
}