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-/* Graphics.java -- Abstract Java drawing class
- Copyright (C) 1999, 2000, 2002, 2004, 2005 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.awt;
-
-import java.awt.image.ImageObserver;
-import java.text.AttributedCharacterIterator;
-
-/**
- * This is the abstract superclass of classes for drawing to graphics
- * devices such as the screen or printers.
- *
- * @author Aaron M. Renn (arenn@urbanophile.com)
- * @author Warren Levy (warrenl@cygnus.com)
- */
-public abstract class Graphics
-{
-
- /**
- * Default constructor for subclasses.
- */
- protected
- Graphics()
- {
- }
-
- /**
- * Returns a copy of this <code>Graphics</code> object.
- *
- * @return A copy of this object.
- */
- public abstract Graphics create();
-
- /**
- * Returns a copy of this <code>Graphics</code> object. The origin point
- * will be translated to the point (x, y) and the cliping rectangle set
- * to the intersection of the clipping rectangle in this object and the
- * rectangle specified by the parameters to this method.
- *
- * @param x The new X coordinate of the clipping region rect.
- * @param y The new Y coordinate of the clipping region rect.
- * @param width The width of the clipping region intersect rectangle.
- * @param height The height of the clipping region intersect rectangle.
- *
- * @return A copy of this object, modified as specified.
- */
- public Graphics create(int x, int y, int width, int height)
- {
- Graphics g = create();
-
- g.translate(x, y);
- // FIXME: I'm not sure if this will work. Are the old clip rect bounds
- // translated above?
- g.clipRect(0, 0, width, height);
-
- return(g);
- }
-
- /**
- * Translates this context so that its new origin point is the point
- * (x, y).
- *
- * @param x The new X coordinate of the origin.
- * @param y The new Y coordinate of the origin.
- */
- public abstract void translate(int x, int y);
-
- /**
- * Returns the current color for this object.
- *
- * @return The color for this object.
- */
- public abstract Color getColor();
-
- /**
- * Sets the current color for this object.
- *
- * @param color The new color.
- */
- public abstract void setColor(Color color);
-
- /**
- * Sets this context into "paint" mode, where the target pixels are
- * completely overwritten when drawn on.
- */
- public abstract void setPaintMode();
-
- /**
- * Sets this context info "XOR" mode, where the targe pixles are
- * XOR-ed when drawn on.
- *
- * @param color The color to XOR against.
- */
- public abstract void setXORMode(Color color);
-
- /**
- * Returns the current font for this graphics context.
- *
- * @return The current font.
- */
- public abstract Font getFont();
-
- /**
- * Sets the font for this graphics context to the specified value.
- *
- * @param font The new font.
- */
- public abstract void setFont(Font font);
-
- /**
- * Returns the font metrics for the current font.
- *
- * @return The font metrics for the current font.
- */
- public FontMetrics getFontMetrics()
- {
- return getFontMetrics(getFont());
- }
-
- /**
- * Returns the font metrics for the specified font.
- *
- * @param font The font to return metrics for.
- *
- * @return The requested font metrics.
- */
- public abstract FontMetrics getFontMetrics(Font font);
-
- /**
- * Returns the bounding rectangle of the clipping region for this
- * graphics context.
- *
- * @return The bounding rectangle for the clipping region.
- */
- public abstract Rectangle getClipBounds();
-
- /**
- * Returns the bounding rectangle of the clipping region for this
- * graphics context.
- *
- * @return The bounding rectangle for the clipping region.
- *
- * @deprecated This method is deprecated in favor of
- * <code>getClipBounds()</code>.
- */
- public Rectangle getClipRect()
- {
- return getClipBounds();
- }
-
- /**
- * Sets the clipping region to the intersection of the current clipping
- * region and the rectangle determined by the specified parameters.
- *
- * @param x The X coordinate of the upper left corner of the intersect rect.
- * @param y The Y coordinate of the upper left corner of the intersect rect.
- * @param width The width of the intersect rect.
- * @param height The height of the intersect rect.
- */
- public abstract void clipRect(int x, int y, int width, int height);
-
- /**
- * Sets the clipping region to the rectangle determined by the specified
- * parameters.
- *
- * @param x The X coordinate of the upper left corner of the rect.
- * @param y The Y coordinate of the upper left corner of the rect.
- * @param width The width of the rect.
- * @param height The height of the rect.
- */
- public abstract void setClip(int x, int y, int width, int height);
-
- /**
- * Returns the current clipping region as a <code>Shape</code> object.
- *
- * @return The clipping region as a <code>Shape</code>.
- */
- public abstract Shape getClip();
-
- /**
- * Sets the clipping region to the specified <code>Shape</code>.
- *
- * @param clip The new clipping region.
- */
- public abstract void setClip(Shape clip);
-
- /**
- * Copies the specified rectangle to the specified offset location.
- *
- * @param x The X coordinate of the upper left corner of the copy rect.
- * @param y The Y coordinate of the upper left corner of the copy rect.
- * @param width The width of the copy rect.
- * @param height The height of the copy rect.
- * @param dx The offset from the X value to start drawing.
- * @param dy The offset from the Y value to start drawing.
- */
- public abstract void copyArea(int x, int y, int width, int height, int dx,
- int dy);
-
- /**
- * Draws a line between the two specified points.
- *
- * @param x1 The X coordinate of the first point.
- * @param y1 The Y coordinate of the first point.
- * @param x2 The X coordinate of the second point.
- * @param y2 The Y coordinate of the second point.
- */
- public abstract void drawLine(int x1, int y1, int x2, int y2);
-
- /**
- * Fills the area bounded by the specified rectangle.
- *
- * @param x The X coordinate of the upper left corner of the fill rect.
- * @param y The Y coordinate of the upper left corner of the fill rect.
- * @param width The width of the fill rect.
- * @param height The height of the fill rect.
- */
- public abstract void fillRect(int x, int y, int width, int height);
-
- /**
- * Draws the outline of the specified rectangle.
- *
- * @param x The X coordinate of the upper left corner of the draw rect.
- * @param y The Y coordinate of the upper left corner of the draw rect.
- * @param width The width of the draw rect.
- * @param height The height of the draw rect.
- */
- public void drawRect(int x, int y, int width, int height)
- {
- int x1 = x;
- int y1 = y;
- int x2 = x + width;
- int y2 = y + height;
- drawLine(x1, y1, x2, y1);
- drawLine(x2, y1, x2, y2);
- drawLine(x2, y2, x1, y2);
- drawLine(x1, y2, x1, y1);
- }
-
- /**
- * Clears the specified rectangle.
- *
- * @param x The X coordinate of the upper left corner of the clear rect.
- * @param y The Y coordinate of the upper left corner of the clear rect.
- * @param width The width of the clear rect.
- * @param height The height of the clear rect.
- */
- public abstract void clearRect(int x, int y, int width, int height);
-
- /**
- * Draws the outline of the specified rectangle with rounded cornders.
- *
- * @param x The X coordinate of the upper left corner of the draw rect.
- * @param y The Y coordinate of the upper left corner of the draw rect.
- * @param width The width of the draw rect.
- * @param height The height of the draw rect.
- * @param arcWidth The width of the corner arcs.
- * @param arcHeight The height of the corner arcs.
- */
- public abstract void drawRoundRect(int x, int y, int width, int height,
- int arcWidth, int arcHeight);
-
- /**
- * Fills the specified rectangle with rounded cornders.
- *
- * @param x The X coordinate of the upper left corner of the fill rect.
- * @param y The Y coordinate of the upper left corner of the fill rect.
- * @param width The width of the fill rect.
- * @param height The height of the fill rect.
- * @param arcWidth The width of the corner arcs.
- * @param arcHeight The height of the corner arcs.
- */
- public abstract void fillRoundRect(int x, int y, int width, int height,
- int arcWidth, int arcHeight);
-
- public void draw3DRect(int x, int y, int width, int height, boolean raised)
- {
- Color color = getColor();
- Color tl = color.brighter();
- Color br = color.darker();
-
- if (!raised)
- {
- Color tmp = tl;
- tl = br;
- br = tmp;
- }
-
- int x1 = x;
- int y1 = y;
- int x2 = x + width;
- int y2 = y + height;
-
- setColor(tl);
- drawLine(x1, y1, x2, y1);
- drawLine(x1, y2, x1, y1);
- setColor(br);
- drawLine(x2, y1, x2, y2);
- drawLine(x2, y2, x1, y2);
- setColor(color);
- }
-
- /**
- * Fills the specified rectangle with a 3D effect
- *
- * @param x The X coordinate of the upper left corner of the fill rect.
- * @param y The Y coordinate of the upper left corner of the fill rect.
- * @param width The width of the fill rect.
- * @param height The height of the fill rect.
- * @param raised <code>true</code> if the rectangle appears raised,
- * <code>false</code> if it should appear etched.
- */
- public void fill3DRect(int x, int y, int width, int height, boolean raised)
- {
- fillRect(x, y, width, height);
- draw3DRect(x, y, width-1, height-1, raised);
- }
-
- /**
- * Draws an oval that just fits within the specified rectangle.
- *
- * @param x The X coordinate of the upper left corner of the rect.
- * @param y The Y coordinate of the upper left corner of the rect.
- * @param width The width of the rect.
- * @param height The height of the rect.
- */
- public abstract void drawOval(int x, int y, int width, int height);
-
- /**
- * Fills an oval that just fits within the specified rectangle.
- *
- * @param x The X coordinate of the upper left corner of the rect.
- * @param y The Y coordinate of the upper left corner of the rect.
- * @param width The width of the rect.
- * @param height The height of the rect.
- */
- public abstract void fillOval(int x, int y, int width, int height);
-
- /**
- * Draws an arc using the specified bounding rectangle and the specified
- * angle parameter. The arc is centered at the center of the rectangle.
- * The arc starts at the arcAngle position and extend for arcAngle
- * degrees. The degree origin is at the 3 o'clock position.
- *
- * @param x The X coordinate of the upper left corner of the rect.
- * @param y The Y coordinate of the upper left corner of the rect.
- * @param width The width of the rect.
- * @param height The height of the rect.
- * @param arcStart The beginning angle of the arc.
- * @param arcAngle The extent of the arc.
- */
- public abstract void drawArc(int x, int y, int width, int height,
- int arcStart, int arcAngle);
-
- /**
- * Fills the arc define by the specified bounding rectangle and the specified
- * angle parameter. The arc is centered at the center of the rectangle.
- * The arc starts at the arcAngle position and extend for arcAngle
- * degrees. The degree origin is at the 3 o'clock position.
- *
- * @param x The X coordinate of the upper left corner of the rect.
- * @param y The Y coordinate of the upper left corner of the rect.
- * @param width The width of the rect.
- * @param height The height of the rect.
- * @param arcStart The beginning angle of the arc.
- * @param arcAngle The extent of the arc.
- */
- public abstract void fillArc(int x, int y, int width, int height,
- int arcStart, int arcAngle);
-
- /**
- * Draws a series of interconnected lines determined by the arrays
- * of corresponding x and y coordinates.
- *
- * @param xPoints The X coordinate array.
- * @param yPoints The Y coordinate array.
- * @param npoints The number of points to draw.
- */
- public abstract void drawPolyline(int xPoints[], int yPoints[], int npoints);
-
- /**
- * Draws a series of interconnected lines determined by the arrays
- * of corresponding x and y coordinates. The figure is closed if necessary
- * by connecting the first and last points.
- *
- * @param xPoints The X coordinate array.
- * @param yPoints The Y coordinate array.
- * @param npoints The number of points to draw.
- */
- public abstract void drawPolygon(int xPoints[], int yPoints[], int npoints);
-
- /**
- * Draws the specified polygon.
- *
- * @param polygon The polygon to draw.
- */
- public void drawPolygon(Polygon polygon)
- {
- drawPolygon(polygon.xpoints, polygon.ypoints, polygon.npoints);
- }
-
- /**
- * Fills the polygon determined by the arrays
- * of corresponding x and y coordinates.
- *
- * @param xPoints The X coordinate array.
- * @param yPoints The Y coordinate array.
- * @param npoints The number of points to draw.
- */
- public abstract void fillPolygon(int xPoints[], int yPoints[], int npoints);
-
- /**
- * Fills the specified polygon
- *
- * @param polygon The polygon to fill.
- */
- public void fillPolygon(Polygon polygon)
- {
- fillPolygon(polygon.xpoints, polygon.ypoints, polygon.npoints);
- }
-
- /**
- * Draws the specified string starting at the specified point.
- *
- * @param string The string to draw.
- * @param x The X coordinate of the point to draw at.
- * @param y The Y coordinate of the point to draw at.
- */
- public abstract void drawString(String string, int x, int y);
-
- public abstract void drawString (AttributedCharacterIterator ci, int x,
- int y);
-
- /**
- * Draws the specified characters starting at the specified point.
- *
- * @param data The array of characters to draw.
- * @param offset The offset into the array to start drawing characters from.
- * @param length The number of characters to draw.
- * @param x The X coordinate of the point to draw at.
- * @param y The Y coordinate of the point to draw at.
- */
- public void drawChars(char data[], int offset, int length, int x, int y)
- {
- drawString(new String(data, offset, length), x, y);
- }
-
- public void drawBytes(byte[] data, int offset, int length, int x, int y)
- {
- String str = new String(data, offset, length);
- drawString(str, x, y);
- }
-
- /**
- * Draws all of the image that is available and returns. If the image
- * is not completely loaded, <code>false</code> is returned and
- * the specified iamge observer is notified as more data becomes
- * available.
- *
- * @param image The image to draw.
- * @param x The X coordinate of the point to draw at.
- * @param y The Y coordinate of the point to draw at.
- * @param observer The image observer to notify as data becomes available.
- *
- * @return <code>true</code> if all the image data is available,
- * <code>false</code> otherwise.
- */
- public abstract boolean drawImage(Image image, int x, int y,
- ImageObserver observer);
-
- /**
- * Draws all of the image that is available and returns. The image
- * is scaled to fit in the specified rectangle. If the image
- * is not completely loaded, <code>false</code> is returned and
- * the specified iamge observer is notified as more data becomes
- * available.
- *
- * @param image The image to draw.
- * @param x The X coordinate of the point to draw at.
- * @param y The Y coordinate of the point to draw at.
- * @param width The width of the rectangle to draw in.
- * @param height The height of the rectangle to draw in.
- * @param observer The image observer to notify as data becomes available.
- *
- * @return <code>true</code> if all the image data is available,
- * <code>false</code> otherwise.
- */
- public abstract boolean drawImage(Image image, int x, int y, int width,
- int height, ImageObserver observer);
-
- /**
- * Draws all of the image that is available and returns. If the image
- * is not completely loaded, <code>false</code> is returned and
- * the specified iamge observer is notified as more data becomes
- * available.
- *
- * @param image The image to draw.
- * @param x The X coordinate of the point to draw at.
- * @param y The Y coordinate of the point to draw at.
- * @param bgcolor The background color to use for the image.
- * @param observer The image observer to notify as data becomes available.
- *
- * @return <code>true</code> if all the image data is available,
- * <code>false</code> otherwise.
- */
- public abstract boolean drawImage(Image image, int x, int y, Color bgcolor,
- ImageObserver observer);
-
- /**
- * Draws all of the image that is available and returns. The image
- * is scaled to fit in the specified rectangle. If the image
- * is not completely loaded, <code>false</code> is returned and
- * the specified iamge observer is notified as more data becomes
- * available.
- *
- * @param image The image to draw.
- * @param x The X coordinate of the point to draw at.
- * @param y The Y coordinate of the point to draw at.
- * @param width The width of the rectangle to draw in.
- * @param height The height of the rectangle to draw in.
- * @param bgcolor The background color to use for the image.
- * @param observer The image observer to notify as data becomes available.
- *
- * @return <code>true</code> if all the image data is available,
- * <code>false</code> otherwise.
- */
- public abstract boolean drawImage(Image image, int x, int y, int width,
- int height, Color bgcolor,
- ImageObserver observer);
-
- /**
- * FIXME: Write Javadocs for this when you understand it.
- */
- public abstract boolean drawImage(Image image, int dx1, int dy1, int dx2,
- int dy2, int sx1, int sy1, int sx2,
- int sy2, ImageObserver observer);
-
- /**
- * FIXME: Write Javadocs for this when you understand it.
- */
- public abstract boolean drawImage(Image image, int dx1, int dy1, int dx2,
- int dy2, int sx1, int sy1, int sx2,
- int sy2, Color bgcolor,
- ImageObserver observer);
-
- /**
- * Free any resources held by this graphics context immediately instead
- * of waiting for the object to be garbage collected and finalized.
- */
- public abstract void dispose();
-
- /**
- * Frees the resources held by this graphics context when it is
- * garbage collected.
- */
- public void finalize()
- {
- dispose();
- }
-
- /**
- * Returns a string representation of this object.
- *
- * @return A string representation of this object.
- */
- public String toString()
- {
- return getClass ().getName () + "[font=" + getFont () + ",color="
- + getColor () + "]";
- }
-
- /**
- * Returns <code>true</code> if the specified rectangle intersects with the
- * current clip, <code>false</code> otherwise.
- *
- * @param x the X coordinate of the upper left corner of the test rectangle
- * @param y the Y coordinate of the upper left corner of the test rectangle
- * @param width the width of the upper left corner of the test rectangle
- * @param height the height of the upper left corner of the test rectangle
- * @return <code>true</code> if the specified rectangle intersects with the
- * current clip, <code>false</code> otherwise
- */
- public boolean hitClip(int x, int y, int width, int height)
- {
- Shape clip = getClip();
- if (clip == null)
- return true;
- return getClip().intersects(x, y, width, height);
- }
-
- public Rectangle getClipBounds(Rectangle r)
- {
- Rectangle clipBounds = getClipBounds();
-
- if (r == null)
- return clipBounds;
-
- r.x = clipBounds.x;
- r.y = clipBounds.y;
- r.width = clipBounds.width;
- r.height = clipBounds.height;
- return r;
- }
-}