libjava/gnu/awt/j2d/AbstractGraphicsState.java

   1 /* Copyright (C) 2000, 2001  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 package gnu.awt.j2d;
  10
  11 import java.awt.Color;
  12 import java.awt.Image;
  13 import java.awt.Shape;
  14 import java.awt.Rectangle;
  15 import java.awt.Graphics;
  16 import java.awt.Graphics2D;
  17 import java.awt.GraphicsConfiguration;
  18 import java.awt.Font;
  19 import java.awt.FontMetrics;
  20 import java.awt.image.ImageObserver;
  21
  22 /**
  23  * Base class for graphics state objects (State pattern, GOF book)
  24  * that represents the current pipeline configuration. The Graphics2D
  25  * object forwards most of the requests to the state object. The
  26  * Graphics2D object itself only administers properties that are not
  27  * specific for a certain state.
  28  */
  29 public abstract class AbstractGraphicsState implements Cloneable
  30 {
  31   Graphics2DImpl frontend;
  32
  33   public void setFrontend(Graphics2DImpl frontend)
  34   {
  35     this.frontend = frontend;
  36   }
  37
  38   public void dispose()
  39   {
  40     frontend = null;
  41   }
  42
  43   // -------- Graphics methods:
  44
  45   public abstract void setColor(Color color);
  46
  47   public abstract void setPaintMode();
  48
  49   public abstract void setXORMode(Color altColor);
  50
  51   public abstract void setFont(Font font);
  52
  53   public abstract FontMetrics getFontMetrics(Font font);
  54
  55   public abstract void setClip(Shape clip);
  56
  57   public abstract Shape getClip();
  58   public abstract Rectangle getClipBounds();
  59
  60   public abstract void copyArea(int x, int y,
  61                                 int width, int height,
  62                                 int dx, int dy);
  63
  64   public abstract void drawLine(int x1, int y1,
  65                                 int x2, int y2);
  66
  67   public abstract void fillRect(int x, int y,
  68                                 int width, int height);
  69
  70   public abstract void clearRect(int x, int y,
  71                                  int width, int height);
  72
  73   public abstract void drawRoundRect(int x, int y,
  74                                      int width, int height,
  75                                      int arcWidth, int arcHeight);
  76
  77   public abstract void fillRoundRect(int x, int y,
  78                                      int width, int height,
  79                                      int arcWidth, int arcHeight);
  80
  81   public abstract void drawOval(int x, int y,
  82                                 int width, int height);
  83
  84   public abstract void fillOval(int x, int y,
  85                                 int width, int height);
  86
  87   public abstract void drawArc(int x, int y,
  88                                int width, int height,
  89                                int startAngle, int arcAngle);
  90
  91   public abstract void fillArc(int x, int y,
  92                                int width, int height,
  93                                int startAngle, int arcAngle);
  94
  95   public abstract void drawPolyline(int[] xPoints, int[] yPoints,int nPoints);
  96
  97   public abstract void drawPolygon(int[] xPoints, int[] yPoints, int nPoints);
  98
  99   public abstract void fillPolygon(int[] xPoints, int[] yPoints, int nPoints);
 100
 101   public abstract boolean drawImage(Image image, int x, int y,
 102                                     ImageObserver observer);
 103
 104
 105   // -------- Graphics2D methods:
 106
 107   public abstract void draw(Shape shape);
 108
 109   public abstract void fill(Shape shape);
 110
 111   public abstract boolean hit(Rectangle rect, Shape text, boolean onStroke);
 112
 113   public abstract void drawString(String text, int x, int y);
 114
 115   public abstract void drawString(String text, float x, float y);
 116
 117   public abstract void translate(int x, int y);
 118
 119   public abstract void translate(double tx, double ty);
 120
 121   public abstract void rotate(double theta);
 122
 123   public abstract void rotate(double theta, double x, double y);
 124
 125   public abstract void scale(double scaleX, double scaleY);
 126
 127   public abstract void shear(double shearX, double shearY);
 128
 129   public Object clone ()
 130   {
 131     return super.clone ();
 132   }
 133 }