Transform an awt Rectangle2d instance into a swt Rectangle2d. : SWT Swing AWT « SWT JFace Eclipse « Java






Transform an awt Rectangle2d instance into a swt Rectangle2d.

 
/* 
 * JFreeChart : a free chart library for the Java(tm) platform
 * 
 *
 * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * -------------
 * SWTUtils.java
 * -------------
 * (C) Copyright 2006, 2007, by Henry Proudhon and Contributors.
 *
 * Original Author:  Henry Proudhon (henry.proudhon AT ensmp.fr);
 * Contributor(s):   Rainer Blessing;
 *                   David Gilbert (david.gilbert@object-refinery.com);
 *                   Christoph Beck.
 *
 * Changes
 * -------
 * 01-Aug-2006 : New class (HP);
 * 16-Jan-2007 : Use FontData.getHeight() instead of direct field access (RB);
 * 31-Jan-2007 : Moved the dummy JPanel from SWTGraphics2D.java,
 *               added a new convert method for mouse events (HP);
 * 12-Jul-2007 : Improved the mouse event conversion with buttons
 *               and modifiers handling, patch sent by Christoph Beck (HP);
 * 27-Aug-2007 : Modified toAwtMouseEvent signature (HP);
 * 27-Nov-2007 : Moved convertToSWT() method from SWTGraphics2D and added
 *               convertAWTImageToSWT() (DG);
 * 01-Jul-2008 : Simplify AWT/SWT font style conversions (HP);
 *
 */


import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.DirectColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.WritableRaster;

import javax.swing.JPanel;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.graphics.Rectangle;

/**
 * Utility class gathering some useful and general method.
 * Mainly convert forth and back graphical stuff between
 * awt and swt.
 */
public class SWTUtils {

    private final static String Az = "ABCpqr";

    /** A dummy JPanel used to provide font metrics. */
    protected static final JPanel DUMMY_PANEL = new JPanel();



    /**
     * Creates a swt color instance to match the rgb values
     * of the specified awt color. alpha channel is not supported.
     * Note that the dispose method will need to be called on the
     * returned object.
     *
     * @param device The swt device to draw on (display or gc device).
     * @param color The awt color to match.
     * @return a swt color object.
     */
    public static Color toSwtColor(Device device, java.awt.Color color) {
        return new org.eclipse.swt.graphics.Color(device,
                color.getRed(), color.getGreen(), color.getBlue());
    }

    /**
     * Transform an awt Rectangle2d instance into a swt one.
     * The coordinates are rounded to integer for the swt object.
     * @param rect2d The awt rectangle to map.
     * @return an swt <code>Rectangle</code> object.
     */
    public static Rectangle toSwtRectangle(Rectangle2D rect2d) {
        return new Rectangle(
                (int) Math.round(rect2d.getMinX()),
                (int) Math.round(rect2d.getMinY()),
                (int) Math.round(rect2d.getWidth()),
                (int) Math.round(rect2d.getHeight()));
    }

    /**
     * Transform a swt Rectangle instance into an awt one.
     * @param rect the swt <code>Rectangle</code>
     * @return a Rectangle2D.Double instance with
     * the eappropriate location and size.
     */
    public static Rectangle2D toAwtRectangle(Rectangle rect) {
        Rectangle2D rect2d = new Rectangle2D.Double();
        rect2d.setRect(rect.x, rect.y, rect.width, rect.height);
        return rect2d;
    }

    /**
     * Returns an AWT point with the same coordinates as the specified
     * SWT point.
     *
     * @param p  the SWT point (<code>null</code> not permitted).
     *
     * @return An AWT point with the same coordinates as <code>p</code>.
     *
     * @see #toSwtPoint(java.awt.Point)
     */
    public static Point2D toAwtPoint(Point p) {
        return new java.awt.Point(p.x, p.y);
    }

    /**
     * Returns an SWT point with the same coordinates as the specified
     * AWT point.
     *
     * @param p  the AWT point (<code>null</code> not permitted).
     *
     * @return An SWT point with the same coordinates as <code>p</code>.
     *
     * @see #toAwtPoint(Point)
     */
    public static Point toSwtPoint(java.awt.Point p) {
        return new Point(p.x, p.y);
    }

    /**
     * Returns an SWT point with the same coordinates as the specified AWT
     * point (rounded to integer values).
     *
     * @param p  the AWT point (<code>null</code> not permitted).
     *
     * @return An SWT point with the same coordinates as <code>p</code>.
     *
     * @see #toAwtPoint(Point)
     */
    public static Point toSwtPoint(java.awt.geom.Point2D p) {
        return new Point((int) Math.round(p.getX()),
                (int) Math.round(p.getY()));
    }


}

   
  








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