/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -------------
* 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);
*
*/
package org.jfree.experimental.swt;
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();
/**
* Create a <code>FontData</code> object which encapsulate
* the essential data to create a swt font. The data is taken
* from the provided awt Font.
* <p>Generally speaking, given a font size, the returned swt font
* will display differently on the screen than the awt one.
* Because the SWT toolkit use native graphical resources whenever
* it is possible, this fact is platform dependent. To address
* this issue, it is possible to enforce the method to return
* a font with the same size (or at least as close as possible)
* as the awt one.
* <p>When the object is no more used, the user must explicitly
* call the dispose method on the returned font to free the
* operating system resources (the garbage collector won't do it).
*
* @param device The swt device to draw on (display or gc device).
* @param font The awt font from which to get the data.
* @param ensureSameSize A boolean used to enforce the same size
* (in pixels) between the awt font and the newly created swt font.
* @return a <code>FontData</code> object.
*/
public static FontData toSwtFontData(Device device, java.awt.Font font,
boolean ensureSameSize) {
FontData fontData = new FontData();
fontData.setName(font.getFamily());
// SWT and AWT share the same style constants.
fontData.setStyle(font.getStyle());
// convert the font size (in pt for awt) to height in pixels for swt
int height = (int) Math.round(font.getSize() * 72.0
/ device.getDPI().y);
fontData.setHeight(height);
// hack to ensure the newly created swt fonts will be rendered with the
// same height as the awt one
if (ensureSameSize) {
GC tmpGC = new GC(device);
Font tmpFont = new Font(device, fontData);
tmpGC.setFont(tmpFont);
if (tmpGC.textExtent(Az).x
> DUMMY_PANEL.getFontMetrics(font).stringWidth(Az)) {
while (tmpGC.textExtent(Az).x
> DUMMY_PANEL.getFontMetrics(font).stringWidth(Az)) {
tmpFont.dispose();
height--;
fontData.setHeight(height);
tmpFont = new Font(device, fontData);
tmpGC.setFont(tmpFont);
}
}
else if (tmpGC.textExtent(Az).x
< DUMMY_PANEL.getFontMetrics(font).stringWidth(Az)) {
while (tmpGC.textExtent(Az).x
< DUMMY_PANEL.getFontMetrics(font).stringWidth(Az)) {
tmpFont.dispose();
height++;
fontData.setHeight(height);
tmpFont = new Font(device, fontData);
tmpGC.setFont(tmpFont);
}
}
tmpFont.dispose();
tmpGC.dispose();
}
return fontData;
}
/**
* Create an awt font by converting as much information
* as possible from the provided swt <code>FontData</code>.
* <p>Generally speaking, given a font size, an swt font will
* display differently on the screen than the corresponding awt
* one. Because the SWT toolkit use native graphical ressources whenever
* it is possible, this fact is platform dependent. To address
* this issue, it is possible to enforce the method to return
* an awt font with the same height as the swt one.
*
* @param device The swt device being drawn on (display or gc device).
* @param fontData The swt font to convert.
* @param ensureSameSize A boolean used to enforce the same size
* (in pixels) between the swt font and the newly created awt font.
* @return An awt font converted from the provided swt font.
*/
public static java.awt.Font toAwtFont(Device device, FontData fontData,
boolean ensureSameSize) {
int height = (int) Math.round(fontData.getHeight() * device.getDPI().y
/ 72.0);
// hack to ensure the newly created awt fonts will be rendered with the
// same height as the swt one
if (ensureSameSize) {
GC tmpGC = new GC(device);
Font tmpFont = new Font(device, fontData);
tmpGC.setFont(tmpFont);
JPanel DUMMY_PANEL = new JPanel();
java.awt.Font tmpAwtFont = new java.awt.Font(fontData.getName(),
fontData.getStyle(), height);
if (DUMMY_PANEL.getFontMetrics(tmpAwtFont).stringWidth(Az)
> tmpGC.textExtent(Az).x) {
while (DUMMY_PANEL.getFontMetrics(tmpAwtFont).stringWidth(Az)
> tmpGC.textExtent(Az).x) {
height--;
tmpAwtFont = new java.awt.Font(fontData.getName(),
fontData.getStyle(), height);
}
}
else if (DUMMY_PANEL.getFontMetrics(tmpAwtFont).stringWidth(Az)
< tmpGC.textExtent(Az).x) {
while (DUMMY_PANEL.getFontMetrics(tmpAwtFont).stringWidth(Az)
< tmpGC.textExtent(Az).x) {
height++;
tmpAwtFont = new java.awt.Font(fontData.getName(),
fontData.getStyle(), height);
}
}
tmpFont.dispose();
tmpGC.dispose();
}
return new java.awt.Font(fontData.getName(), fontData.getStyle(),
height);
}
/**
* Create an awt font by converting as much information
* as possible from the provided swt <code>Font</code>.
*
* @param device The swt device to draw on (display or gc device).
* @param font The swt font to convert.
* @return An awt font converted from the provided swt font.
*/
public static java.awt.Font toAwtFont(Device device, Font font) {
FontData fontData = font.getFontData()[0];
return toAwtFont(device, fontData, true);
}
/**
* Creates an awt color instance to match the rgb values
* of the specified swt color.
*
* @param color The swt color to match.
* @return an awt color abject.
*/
public static java.awt.Color toAwtColor(Color color) {
return new java.awt.Color(color.getRed(), color.getGreen(),
color.getBlue());
}
/**
* Creates a swt color instance to match the rgb values
* of the specified awt paint. For now, this method test
* if the paint is a color and then return the adequate
* swt color. Otherwise plain black is assumed.
*
* @param device The swt device to draw on (display or gc device).
* @param paint The awt color to match.
* @return a swt color object.
*/
public static Color toSwtColor(Device device, java.awt.Paint paint) {
java.awt.Color color;
if (paint instanceof java.awt.Color) {
color = (java.awt.Color) paint;
}
else {
try {
throw new Exception("only color is supported at present... "
+ "setting paint to uniform black color");
}
catch (Exception e) {
e.printStackTrace();
color = new java.awt.Color(0, 0, 0);
}
}
return new org.eclipse.swt.graphics.Color(device,
color.getRed(), color.getGreen(), color.getBlue());
}
/**
* 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()));
}
/**
* Creates an AWT <code>MouseEvent</code> from a swt event.
* This method helps passing SWT mouse event to awt components.
* @param event The swt event.
* @return A AWT mouse event based on the given SWT event.
*/
public static MouseEvent toAwtMouseEvent(org.eclipse.swt.events.MouseEvent event) {
int button = MouseEvent.NOBUTTON;
switch (event.button) {
case 1: button = MouseEvent.BUTTON1; break;
case 2: button = MouseEvent.BUTTON2; break;
case 3: button = MouseEvent.BUTTON3; break;
}
int modifiers = 0;
if ((event.stateMask & SWT.CTRL) != 0) {
modifiers |= InputEvent.CTRL_DOWN_MASK;
}
if ((event.stateMask & SWT.SHIFT) != 0) {
modifiers |= InputEvent.SHIFT_DOWN_MASK;
}
if ((event.stateMask & SWT.ALT) != 0) {
modifiers |= InputEvent.ALT_DOWN_MASK;
}
MouseEvent awtMouseEvent = new MouseEvent(DUMMY_PANEL, event.hashCode(),
event.time, modifiers, event.x, event.y, 1, false, button);
return awtMouseEvent;
}
/**
* Converts an AWT image to SWT.
*
* @param image the image (<code>null</code> not permitted).
*
* @return Image data.
*/
public static ImageData convertAWTImageToSWT(Image image) {
if (image == null) {
throw new IllegalArgumentException("Null 'image' argument.");
}
int w = image.getWidth(null);
int h = image.getHeight(null);
if (w == -1 || h == -1) {
return null;
}
BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics g = bi.getGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
return convertToSWT(bi);
}
/**
* Converts a buffered image to SWT <code>ImageData</code>.
*
* @param bufferedImage the buffered image (<code>null</code> not
* permitted).
*
* @return The image data.
*/
public static ImageData convertToSWT(BufferedImage bufferedImage) {
if (bufferedImage.getColorModel() instanceof DirectColorModel) {
DirectColorModel colorModel
= (DirectColorModel) bufferedImage.getColorModel();
PaletteData palette = new PaletteData(colorModel.getRedMask(),
colorModel.getGreenMask(), colorModel.getBlueMask());
ImageData data = new ImageData(bufferedImage.getWidth(),
bufferedImage.getHeight(), colorModel.getPixelSize(),
palette);
WritableRaster raster = bufferedImage.getRaster();
int[] pixelArray = new int[3];
for (int y = 0; y < data.height; y++) {
for (int x = 0; x < data.width; x++) {
raster.getPixel(x, y, pixelArray);
int pixel = palette.getPixel(new RGB(pixelArray[0],
pixelArray[1], pixelArray[2]));
data.setPixel(x, y, pixel);
}
}
return data;
}
else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
IndexColorModel colorModel = (IndexColorModel)
bufferedImage.getColorModel();
int size = colorModel.getMapSize();
byte[] reds = new byte[size];
byte[] greens = new byte[size];
byte[] blues = new byte[size];
colorModel.getReds(reds);
colorModel.getGreens(greens);
colorModel.getBlues(blues);
RGB[] rgbs = new RGB[size];
for (int i = 0; i < rgbs.length; i++) {
rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF,
blues[i] & 0xFF);
}
PaletteData palette = new PaletteData(rgbs);
ImageData data = new ImageData(bufferedImage.getWidth(),
bufferedImage.getHeight(), colorModel.getPixelSize(),
palette);
data.transparentPixel = colorModel.getTransparentPixel();
WritableRaster raster = bufferedImage.getRaster();
int[] pixelArray = new int[1];
for (int y = 0; y < data.height; y++) {
for (int x = 0; x < data.width; x++) {
raster.getPixel(x, y, pixelArray);
data.setPixel(x, y, pixelArray[0]);
}
}
return data;
}
return null;
}
}