gomp-20050608-branch/libjava/classpath/gnu/java/awt/peer/qt/QtGraphics.java

   1 /* QtGraphics.java --
   2    Copyright (C)  2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package gnu.java.awt.peer.qt;
  39
  40 import java.awt.AlphaComposite;
  41 import java.awt.BasicStroke;
  42 import java.awt.Color;
  43 import java.awt.Composite;
  44 import java.awt.GradientPaint;
  45 import java.awt.GraphicsConfiguration;
  46 import java.awt.Font;
  47 import java.awt.FontMetrics;
  48 import java.awt.Graphics;
  49 import java.awt.Graphics2D;
  50 import java.awt.Image;
  51 import java.awt.RenderingHints;
  52 import java.awt.Rectangle;
  53 import java.awt.Paint;
  54 import java.awt.Polygon;
  55 import java.awt.Shape;
  56 import java.awt.Stroke;
  57 import java.awt.font.FontRenderContext;
  58 import java.awt.font.GlyphVector;
  59 import java.awt.geom.AffineTransform;
  60 import java.awt.geom.PathIterator;
  61 import java.awt.geom.Arc2D;
  62 import java.awt.geom.Ellipse2D;
  63 import java.awt.geom.Line2D;
  64 import java.awt.geom.Rectangle2D;
  65 import java.awt.geom.RoundRectangle2D;
  66 import java.awt.image.BufferedImage;
  67 import java.awt.image.BufferedImageOp;
  68 import java.awt.image.ImageObserver;
  69 import java.awt.image.RenderedImage;
  70 import java.awt.image.renderable.RenderableImage;
  71
  72 import java.text.AttributedCharacterIterator;
  73 import java.text.CharacterIterator;
  74 import java.util.Map;
  75
  76 /**
  77  * QtGraphics is an abstract implementation of Graphics2D over a QPainter
  78  * object. This is to be subclassed for different drawing contexts,
  79  * which may have different requirements.
  80  */
  81 public abstract class QtGraphics extends Graphics2D
  82 {
  83   /**
  84    * Native QPainter pointer.
  85    */
  86   protected long nativeObject;
  87
  88   private static final AffineTransform identity = new AffineTransform();
  89
  90   // Graphics state
  91   protected Font font;              // Current font.
  92   protected Color color, bgcolor;   // Current color and background color.
  93   protected Shape clip;             // Current clipping area.
  94   protected Shape initialClip;      // Initial clip bounds
  95   protected AffineTransform xform;  // Current transform
  96   protected Stroke currentStroke;   // the current stroke
  97   protected boolean nativeStroking; // whether we're using Qt's stroking or not
  98   protected Composite composite; // current composite operator
  99   protected double currentAlpha; // current alpha
 100   protected Paint currentPaint;  // current paint
 101   protected RenderingHints renderingHints; // the rendering hints.
 102
 103   /**
 104    * Owner Graphics, used by subcontext created by create()
 105    * to avoid GC of the original context.
 106    */
 107   Graphics parent;
 108
 109   /**
 110    * Do-nothing constructor.
 111    */
 112   QtGraphics()
 113   {
 114   }
 115
 116   /**
 117    * Copying constructor - used by copy() and subclasses.
 118    */
 119   QtGraphics(QtGraphics parent)
 120   {
 121     cloneNativeContext( parent );
 122     setFont( parent.getFont() );
 123     setAlpha( parent.currentAlpha );
 124     setBackground( parent.getBackground() );
 125     setColor( parent.getColor() );
 126     setClip( (initialClip = parent.getClip()) );
 127     setTransform( parent.getTransform() );
 128     setStroke( parent.getStroke() );
 129     setComposite( parent.getComposite() );
 130     setPaint( parent.getPaint() );
 131     setRenderingHints( parent.getRenderingHints() );
 132   }
 133
 134   /**
 135    * Set up some generic defaults.
 136    */
 137   protected void setup()
 138   {
 139     font = new Font ("Dialog", Font.PLAIN, 12);
 140     setTransform( identity );
 141     setStroke( new BasicStroke() );
 142     renderingHints = new RenderingHints( null );
 143   }
 144
 145   public synchronized native void delete();
 146
 147   public void dispose()
 148   {
 149   }
 150
 151   // ********************** etc *******************************
 152
 153   private void resetClip()
 154   {
 155     AffineTransform current = getTransform();
 156     setTransform( identity );
 157     setClip( initialClip );
 158     setTransform( current );
 159   }
 160
 161   protected native void initImage(QtImage image);
 162   protected native void initVolatileImage(QtVolatileImage image);
 163
 164   // Creates a new native QPainter object on the same context.
 165   private native void cloneNativeContext( QtGraphics parent );
 166   private native void setColor(int r, int g, int b, int a);
 167   private native void drawNative( QPainterPath p );
 168   private native void fillNative( QPainterPath p );
 169   private native void setClipNative( QPainterPath p );
 170   private native void setClipRectNative( int x, int y, int w, int h );
 171   private native void intersectClipNative( QPainterPath p );
 172   private native void intersectClipRectNative( int x, int y, int w, int h );
 173   private native void setQtTransform(QMatrix m);
 174   private native void setNativeStroke(QPen p);
 175   private native void setNativeComposite(int alphaMode);
 176   private native void drawStringNative(String string, double x, double y);
 177   private native void setLinearGradient(int r1, int g1, int b1,
 178                                         int r2, int g2, int b2,
 179                                         double x1, double y1,
 180                                         double x2, double y2, boolean cyclic);
 181   private native void setAlphaNative(double alpha);
 182   private native void setFontNative(QtFontPeer font);
 183   private native QPainterPath getClipNative();
 184
 185   void setAlpha(double alpha)
 186   {
 187     currentAlpha = alpha;
 188     setAlphaNative(currentAlpha);
 189   }
 190
 191   // ************ Public methods *********************
 192
 193   /**
 194    * Context-sensitive methods are declared abstract.
 195    */
 196   public abstract Graphics create();
 197
 198   public abstract void copyArea(int x, int y, int width, int height,
 199                                 int dx, int dy);
 200
 201   public abstract GraphicsConfiguration getDeviceConfiguration();
 202
 203
 204   public Color getColor()
 205   {
 206     return new Color(color.getRed(), color.getGreen(), color.getBlue());
 207   }
 208
 209   public void setColor(Color c)
 210   {
 211     if( c == null )
 212       c = Color.white;
 213     this.color = c;
 214     int alpha = (int)(c.getAlpha() * currentAlpha);
 215     setColor(c.getRed(), c.getGreen(), c.getBlue(), alpha);
 216   }
 217
 218   public void setBackground(Color color)
 219   {
 220     bgcolor = new Color(color.getRed(), color.getGreen(), color.getBlue());
 221   }
 222
 223   public Color getBackground()
 224   {
 225     return new Color(bgcolor.getRed(), bgcolor.getGreen(), bgcolor.getBlue());
 226   }
 227
 228   public void setPaintMode()
 229   {
 230   }
 231
 232   public void setXORMode(Color color)
 233   {
 234     // FIXME
 235   }
 236
 237   public boolean hit(Rectangle rect, Shape s, boolean onStroke)
 238   {
 239     if( onStroke )
 240       {
 241         Shape stroked = currentStroke.createStrokedShape( s );
 242         return stroked.intersects( (double)rect.x, (double)rect.y,
 243                                    (double)rect.width, (double)rect.height );
 244       }
 245     return s.intersects( (double)rect.x, (double)rect.y,
 246                          (double)rect.width, (double)rect.height );
 247   }
 248
 249   // ******************* Font ***********************
 250   public Font getFont()
 251   {
 252     return font;
 253   }
 254
 255   public void setFont(Font font)
 256   {
 257     if( font == null )
 258       return;
 259     this.font = font;
 260     if(font.getPeer() != null && font.getPeer() instanceof QtFontPeer)
 261       setFontNative( (QtFontPeer)font.getPeer() );
 262   }
 263
 264   public FontMetrics getFontMetrics(Font font)
 265   {
 266     return new QtFontMetrics(font, this);
 267   }
 268
 269   // ***************** Clipping *********************
 270
 271   /**
 272    * Intersects the current clip with the shape
 273    */
 274   public void clip(Shape s)
 275   {
 276     intersectClipNative( new QPainterPath( s ) );
 277   }
 278
 279   public void clipRect(int x, int y, int width, int height)
 280   {
 281     intersectClipRectNative( x, y, width, height );
 282   }
 283
 284   public void setClip(int x, int y, int width, int height)
 285   {
 286     setClipRectNative( x, y, width, height );
 287   }
 288
 289   public Shape getClip()
 290   {
 291     return getClipNative().getPath();
 292   }
 293
 294   public native Rectangle getClipBounds();
 295
 296   /**
 297    * Sets the clip
 298    */
 299   public void setClip(Shape clip)
 300   {
 301     if (clip == null)
 302       resetClip();
 303     else
 304       setClipNative(new QPainterPath( clip ));
 305   }
 306
 307   // ***************** Drawing primitives *********************
 308
 309   public void draw(Shape s)
 310   {
 311     if( nativeStroking )
 312       drawNative( new QPainterPath(s) );
 313     else
 314       fillNative( new QPainterPath( currentStroke.createStrokedShape( s ) ) );
 315   }
 316
 317   public void fill(Shape s)
 318   {
 319     fillNative( new QPainterPath(s) );
 320   }
 321
 322   public void drawLine(int x1, int y1, int x2, int y2)
 323   {
 324     if( nativeStroking )
 325       drawNative( new QPainterPath((double)x1, (double)y1, (double)x2, (double)y2, true) );
 326     else
 327       draw( new Line2D.Double((double)x1, (double)y1, (double)x2, (double)y2) );
 328   }
 329
 330   public void drawRect(int x, int y, int width, int height)
 331   {
 332     if( nativeStroking )
 333       drawNative( new QPainterPath((double)x, (double)y,
 334                                    (double)width, (double)height) );
 335     else
 336       fillNative( new QPainterPath
 337                   ( currentStroke.createStrokedShape
 338                     (new Rectangle2D.Double
 339                      ((double)x, (double)y,
 340                       (double)width, (double)height) ) ) );
 341   }
 342
 343   public void fillRect(int x, int y, int width, int height)
 344   {
 345     fillNative( new QPainterPath( x, y, width, height ) );
 346   }
 347
 348   public void clearRect(int x, int y, int width, int height)
 349   {
 350     Color c = color;
 351     setColor( bgcolor ); // FIXME
 352     fillRect( x, y, width, height );
 353     setColor( c );
 354   }
 355
 356   public void drawRoundRect(int x, int y, int width, int height,
 357                             int arcWidth, int arcHeight)
 358   {
 359     draw( new RoundRectangle2D.Double(x, y, width, height,
 360                                       arcWidth, arcHeight) );
 361   }
 362
 363   public void fillRoundRect(int x, int y, int width, int height,
 364                             int arcWidth, int arcHeight)
 365   {
 366     fill( new RoundRectangle2D.Double(x, y, width, height,
 367                                       arcWidth, arcHeight) );
 368   }
 369
 370   public void drawOval(int x, int y, int width, int height)
 371   {
 372     draw( new Ellipse2D.Double((double)x, (double)y,
 373                                (double)width, (double)height) );
 374   }
 375
 376   public void fillOval(int x, int y, int width, int height)
 377   {
 378     fill( new Ellipse2D.Double(x, y, width, height) );
 379   }
 380
 381   public void drawArc(int x, int y, int width, int height,
 382                       int arcStart, int arcAngle)
 383   {
 384     draw( new Arc2D.Double(x, y, width, height, arcStart, arcAngle,
 385                            Arc2D.OPEN) );
 386   }
 387
 388   public void fillArc(int x, int y, int width, int height,
 389                       int arcStart, int arcAngle)
 390   {
 391     fill( new Arc2D.Double(x, y, width, height, arcStart, arcAngle,
 392                            Arc2D.CHORD) );
 393   }
 394
 395   public void drawPolyline(int xPoints[], int yPoints[], int npoints)
 396   {
 397     for( int i = 0; i < npoints - 1; i++)
 398       drawLine(xPoints[i], yPoints[i], xPoints[i + 1], yPoints[i + 1]);
 399   }
 400
 401   public void drawPolygon(int xPoints[], int yPoints[], int npoints)
 402   {
 403     draw( new Polygon(xPoints, yPoints, npoints) );
 404   }
 405
 406   public void fillPolygon(int xPoints[], int yPoints[], int npoints)
 407   {
 408     fill( new Polygon(xPoints, yPoints, npoints) );
 409   }
 410
 411   public native void fill3DRect(int x, int y, int width, int height, boolean raised);
 412
 413   public native void draw3DRect(int x, int y, int width, int height, boolean raised);
 414
 415   // *********************** Text rendering *************************
 416
 417   public void drawString(String string, int x, int y)
 418   {
 419     drawStringNative(string, (double)x, (double)y);
 420   }
 421
 422   public void drawString(String string, float x, float y)
 423   {
 424     drawStringNative(string, (double)x, (double)y);
 425   }
 426
 427   public void drawString (AttributedCharacterIterator ci, int x, int y)
 428   {
 429     // FIXME - to something more correct ?
 430     String s = "";
 431     for(char c = ci.first(); c != CharacterIterator.DONE; c = ci.next())
 432       s += c;
 433     drawString(s, x, y);
 434   }
 435
 436   public void drawString(AttributedCharacterIterator ci,
 437                          float x, float y)
 438   {
 439     // FIXME - to something more correct ?
 440     String s = "";
 441     for(char c = ci.first(); c != CharacterIterator.DONE; c = ci.next())
 442       s += c;
 443     drawString(s, x, y);
 444   }
 445
 446   public void drawGlyphVector(GlyphVector v, float x, float y)
 447   {
 448     throw new RuntimeException("Not implemented");
 449   }
 450
 451   // ******************* Image drawing ******************************
 452   public boolean drawImage(Image image,
 453                            AffineTransform Tx,
 454                            ImageObserver obs)
 455   {
 456     if (image instanceof QtImage)
 457       return ((QtImage)image).drawImage(this, new QMatrix( Tx ), obs);
 458
 459     return (new QtImage(image.getSource())).drawImage(this,
 460                                                       new QMatrix( Tx ),
 461                                                       obs);
 462   }
 463
 464   public boolean drawImage(Image image, int x, int y, Color bgcolor,
 465                            ImageObserver observer)
 466   {
 467     if (image instanceof QtImage)
 468       return ((QtImage)image).drawImage (this, x, y, bgcolor, observer);
 469     return (new QtImage(image.getSource())).drawImage (this, x, y,
 470                                                        bgcolor, observer);
 471   }
 472
 473   public boolean drawImage(Image image,
 474                            int dx1, int dy1, int dx2, int dy2,
 475                            int sx1, int sy1, int sx2, int sy2,
 476                            Color bgcolor, ImageObserver observer)
 477   {
 478     if (image instanceof QtImage)
 479       return ((QtImage)image).drawImage(this, dx1, dy1, dx2, dy2,
 480                                         sx1, sy1, sx2, sy2, bgcolor, observer);
 481
 482     return (new QtImage(image.getSource())).drawImage(this, dx1, dy1,
 483                                                       dx2, dy2,
 484                                                       sx1, sy1, sx2, sy2,
 485                                                       bgcolor, observer);
 486   }
 487
 488   public boolean drawImage(Image image, int x, int y,
 489                            int width, int height, Color bgcolor,
 490                            ImageObserver observer)
 491   {
 492     if (image instanceof QtImage)
 493       return ((QtImage)image).drawImage (this, x, y, width, height,
 494                                          bgcolor, observer);
 495     return (new QtImage(image.getSource())).drawImage (this, x, y,
 496                                                        width, height,
 497                                                        bgcolor, observer);
 498   }
 499
 500   public boolean drawImage(Image image, int x, int y, int width, int height,
 501                            ImageObserver observer)
 502   {
 503     return drawImage(image, x, y, width, height, null, observer);
 504   }
 505
 506   public boolean drawImage(Image image, int x, int y, ImageObserver observer)
 507   {
 508     return drawImage(image, x, y, null, observer);
 509   }
 510
 511   public boolean drawImage(Image image, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer)
 512   {
 513     return drawImage(image, dx1, dy1, dx2, dy2,
 514                      sx1, sy1, sx2, sy2, null, observer);
 515   }
 516
 517   // *********************** Transform methods *************************
 518   public AffineTransform getTransform()
 519   {
 520     return new AffineTransform( xform );
 521   }
 522
 523   public void setTransform(AffineTransform Tx)
 524   {
 525     xform = new AffineTransform( Tx );
 526     setQtTransform( new QMatrix( xform ) );
 527   }
 528
 529   public void rotate(double theta)
 530   {
 531     xform.rotate( theta );
 532     setQtTransform( new QMatrix( xform ) );
 533   }
 534
 535   public void rotate(double theta, double x, double y)
 536   {
 537     xform.rotate(theta, x, y);
 538     setQtTransform( new QMatrix( xform ) );
 539   }
 540
 541   public void scale(double sx, double sy)
 542   {
 543     xform.scale(sx, sy);
 544     setQtTransform( new QMatrix( xform ) );
 545   }
 546
 547   public void shear(double shx, double shy)
 548   {
 549     xform.shear(shx, shy);
 550     setQtTransform( new QMatrix( xform ) );
 551   }
 552
 553   public void transform(AffineTransform Tx)
 554   {
 555     xform.concatenate( Tx );
 556     setQtTransform( new QMatrix( xform ) );
 557   }
 558
 559   public void translate(double tx, double ty)
 560   {
 561     xform.translate( tx, ty );
 562     setQtTransform( new QMatrix( xform ) );
 563   }
 564
 565   public void translate(int x, int y)
 566   {
 567     translate((double)x, (double)y);
 568   }
 569
 570   // *************** Stroking, Filling, Compositing *****************
 571   public void setStroke(Stroke s)
 572   {
 573     try  // ..to convert the stroke into a native one.
 574       {
 575         QPen pen = new QPen( s );
 576         nativeStroking = true;
 577         setNativeStroke( pen );
 578         setColor( color );
 579       }
 580     catch (IllegalArgumentException e)
 581       {
 582         nativeStroking = false;
 583       }
 584     currentStroke = s;
 585   }
 586
 587   public Stroke getStroke()
 588   { // FIXME: return copy?
 589     return currentStroke;
 590   }
 591
 592   public void setComposite(Composite comp)
 593   {
 594     if( comp == null)
 595       {
 596         setNativeComposite( AlphaComposite.SRC_OVER );
 597         return;
 598       }
 599
 600     if( comp instanceof AlphaComposite )
 601       {
 602         if( ((AlphaComposite)comp).getRule() != AlphaComposite.XOR )
 603           setAlpha( ((AlphaComposite)comp).getAlpha() );
 604         setNativeComposite( ((AlphaComposite)comp).getRule() );
 605         composite = comp;
 606       }
 607     else
 608       throw new UnsupportedOperationException("We don't support custom"+
 609                                               " composites yet.");
 610   }
 611
 612   public Composite getComposite()
 613   {
 614     return composite;
 615   }
 616
 617   public void setPaint(Paint p)
 618   {
 619     if( p == null )
 620       return;
 621
 622     // FIXME
 623     currentPaint = p;
 624     if( p instanceof GradientPaint )
 625       {
 626         GradientPaint lg = (GradientPaint)p;
 627         setLinearGradient(lg.getColor1().getRed(), lg.getColor1().getGreen(),
 628                           lg.getColor1().getBlue(), lg.getColor2().getRed(),
 629                           lg.getColor2().getGreen(), lg.getColor2().getBlue(),
 630                           lg.getPoint1().getX(), lg.getPoint1().getY(),
 631                           lg.getPoint2().getX(), lg.getPoint2().getY(),
 632                           lg.isCyclic() );
 633         return;
 634       }
 635     if( p instanceof Color )
 636       {
 637         setColor((Color) p);
 638         return;
 639       }
 640     throw new UnsupportedOperationException("We don't support custom"+
 641                                             " paints yet.");
 642   }
 643
 644   public Paint getPaint()
 645   {
 646     // FIXME
 647     return currentPaint;
 648   }
 649
 650   // ********************** Rendering Hints *************************
 651
 652   public void addRenderingHints(Map hints)
 653   {
 654     renderingHints.putAll( hints );
 655   }
 656
 657   public Object getRenderingHint(RenderingHints.Key hintKey)
 658   {
 659     return renderingHints.get( hintKey );
 660   }
 661
 662   public RenderingHints getRenderingHints()
 663   {
 664     return new RenderingHints( renderingHints );
 665   }
 666
 667   public void setRenderingHints(Map hints)
 668   {
 669     renderingHints = new RenderingHints( hints );
 670     updateRenderingHints();
 671   }
 672
 673   public void setRenderingHint(RenderingHints.Key hintKey, Object hintValue)
 674   {
 675     renderingHints.put( hintKey, hintValue );
 676     updateRenderingHints();
 677   }
 678
 679   private void updateRenderingHints()
 680   {
 681     // FIXME - update native settings.
 682   }
 683
 684   ////////////////////////////// unimplemented /////////////////////
 685
 686   public FontRenderContext getFontRenderContext()
 687   {
 688     throw new UnsupportedOperationException("Not implemented yet");
 689   }
 690
 691   public void drawRenderableImage(RenderableImage image, AffineTransform xform)
 692   {
 693     throw new UnsupportedOperationException("Not implemented yet");
 694   }
 695
 696   public void drawRenderedImage(RenderedImage image, AffineTransform xform)
 697   {
 698     throw new UnsupportedOperationException("Not implemented yet");
 699   }
 700
 701   public void drawImage(BufferedImage image, BufferedImageOp op, int x, int y)
 702   {
 703     throw new UnsupportedOperationException("Not implemented yet");
 704   }
 705 }
 706