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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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1+/*
2+ * Copyright (c) 1995, 2006, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+package java.awt;
26+
27+import java.io.*;
28+import java.lang.*;
29+import java.util.*;
30+import java.awt.image.ImageObserver;
31+import java.text.AttributedCharacterIterator;
32+
33+/**
34+ * The <code>Graphics</code> class is the abstract base class for
35+ * all graphics contexts that allow an application to draw onto
36+ * components that are realized on various devices, as well as
37+ * onto off-screen images.
38+ * <p>
39+ * A <code>Graphics</code> object encapsulates state information needed
40+ * for the basic rendering operations that Java supports. This
41+ * state information includes the following properties:
42+ * <p>
43+ * <ul>
44+ * <li>The <code>Component</code> object on which to draw.
45+ * <li>A translation origin for rendering and clipping coordinates.
46+ * <li>The current clip.
47+ * <li>The current color.
48+ * <li>The current font.
49+ * <li>The current logical pixel operation function (XOR or Paint).
50+ * <li>The current XOR alternation color
51+ * (see {@link Graphics#setXORMode}).
52+ * </ul>
53+ * <p>
54+ * Coordinates are infinitely thin and lie between the pixels of the
55+ * output device.
56+ * Operations that draw the outline of a figure operate by traversing
57+ * an infinitely thin path between pixels with a pixel-sized pen that hangs
58+ * down and to the right of the anchor point on the path.
59+ * Operations that fill a figure operate by filling the interior
60+ * of that infinitely thin path.
61+ * Operations that render horizontal text render the ascending
62+ * portion of character glyphs entirely above the baseline coordinate.
63+ * <p>
64+ * The graphics pen hangs down and to the right from the path it traverses.
65+ * This has the following implications:
66+ * <p><ul>
67+ * <li>If you draw a figure that covers a given rectangle, that
68+ * figure occupies one extra row of pixels on the right and bottom edges
69+ * as compared to filling a figure that is bounded by that same rectangle.
70+ * <li>If you draw a horizontal line along the same <i>y</i> coordinate as
71+ * the baseline of a line of text, that line is drawn entirely below
72+ * the text, except for any descenders.
73+ * </ul><p>
74+ * All coordinates that appear as arguments to the methods of this
75+ * <code>Graphics</code> object are considered relative to the
76+ * translation origin of this <code>Graphics</code> object prior to
77+ * the invocation of the method.
78+ * <p>
79+ * All rendering operations modify only pixels which lie within the
80+ * area bounded by the current clip, which is specified by a {@link Shape}
81+ * in user space and is controlled by the program using the
82+ * <code>Graphics</code> object. This <i>user clip</i>
83+ * is transformed into device space and combined with the
84+ * <i>device clip</i>, which is defined by the visibility of windows and
85+ * device extents. The combination of the user clip and device clip
86+ * defines the <i>composite clip</i>, which determines the final clipping
87+ * region. The user clip cannot be modified by the rendering
88+ * system to reflect the resulting composite clip. The user clip can only
89+ * be changed through the <code>setClip</code> or <code>clipRect</code>
90+ * methods.
91+ * All drawing or writing is done in the current color,
92+ * using the current paint mode, and in the current font.
93+ *
94+ * @author Sami Shaio
95+ * @author Arthur van Hoff
96+ * @see java.awt.Component
97+ * @see java.awt.Graphics#clipRect(int, int, int, int)
98+ * @see java.awt.Graphics#setColor(java.awt.Color)
99+ * @see java.awt.Graphics#setPaintMode()
100+ * @see java.awt.Graphics#setXORMode(java.awt.Color)
101+ * @see java.awt.Graphics#setFont(java.awt.Font)
102+ * @since JDK1.0
103+ */
104+public abstract class Graphics {
105+
106+ /**
107+ * Constructs a new <code>Graphics</code> object.
108+ * This constructor is the default contructor for a graphics
109+ * context.
110+ * <p>
111+ * Since <code>Graphics</code> is an abstract class, applications
112+ * cannot call this constructor directly. Graphics contexts are
113+ * obtained from other graphics contexts or are created by calling
114+ * <code>getGraphics</code> on a component.
115+ * @see java.awt.Graphics#create()
116+ * @see java.awt.Component#getGraphics
117+ */
118+ protected Graphics() {
119+ }
120+
121+ /**
122+ * Creates a new <code>Graphics</code> object that is
123+ * a copy of this <code>Graphics</code> object.
124+ * @return a new graphics context that is a copy of
125+ * this graphics context.
126+ */
127+ public abstract Graphics create();
128+
129+ /**
130+ * Creates a new <code>Graphics</code> object based on this
131+ * <code>Graphics</code> object, but with a new translation and clip area.
132+ * The new <code>Graphics</code> object has its origin
133+ * translated to the specified point (<i>x</i>,&nbsp;<i>y</i>).
134+ * Its clip area is determined by the intersection of the original
135+ * clip area with the specified rectangle. The arguments are all
136+ * interpreted in the coordinate system of the original
137+ * <code>Graphics</code> object. The new graphics context is
138+ * identical to the original, except in two respects:
139+ * <p>
140+ * <ul>
141+ * <li>
142+ * The new graphics context is translated by (<i>x</i>,&nbsp;<i>y</i>).
143+ * That is to say, the point (<code>0</code>,&nbsp;<code>0</code>) in the
144+ * new graphics context is the same as (<i>x</i>,&nbsp;<i>y</i>) in
145+ * the original graphics context.
146+ * <li>
147+ * The new graphics context has an additional clipping rectangle, in
148+ * addition to whatever (translated) clipping rectangle it inherited
149+ * from the original graphics context. The origin of the new clipping
150+ * rectangle is at (<code>0</code>,&nbsp;<code>0</code>), and its size
151+ * is specified by the <code>width</code> and <code>height</code>
152+ * arguments.
153+ * </ul>
154+ * <p>
155+ * @param x the <i>x</i> coordinate.
156+ * @param y the <i>y</i> coordinate.
157+ * @param width the width of the clipping rectangle.
158+ * @param height the height of the clipping rectangle.
159+ * @return a new graphics context.
160+ * @see java.awt.Graphics#translate
161+ * @see java.awt.Graphics#clipRect
162+ */
163+ public Graphics create(int x, int y, int width, int height) {
164+ Graphics g = create();
165+ if (g == null) return null;
166+ g.translate(x, y);
167+ g.clipRect(0, 0, width, height);
168+ return g;
169+ }
170+
171+ /**
172+ * Translates the origin of the graphics context to the point
173+ * (<i>x</i>,&nbsp;<i>y</i>) in the current coordinate system.
174+ * Modifies this graphics context so that its new origin corresponds
175+ * to the point (<i>x</i>,&nbsp;<i>y</i>) in this graphics context's
176+ * original coordinate system. All coordinates used in subsequent
177+ * rendering operations on this graphics context will be relative
178+ * to this new origin.
179+ * @param x the <i>x</i> coordinate.
180+ * @param y the <i>y</i> coordinate.
181+ */
182+ public abstract void translate(int x, int y);
183+
184+ /**
185+ * Gets this graphics context's current color.
186+ * @return this graphics context's current color.
187+ * @see java.awt.Color
188+ * @see java.awt.Graphics#setColor(Color)
189+ */
190+ public abstract Color getColor();
191+
192+ /**
193+ * Sets this graphics context's current color to the specified
194+ * color. All subsequent graphics operations using this graphics
195+ * context use this specified color.
196+ * @param c the new rendering color.
197+ * @see java.awt.Color
198+ * @see java.awt.Graphics#getColor
199+ */
200+ public abstract void setColor(Color c);
201+
202+ /**
203+ * Sets the paint mode of this graphics context to overwrite the
204+ * destination with this graphics context's current color.
205+ * This sets the logical pixel operation function to the paint or
206+ * overwrite mode. All subsequent rendering operations will
207+ * overwrite the destination with the current color.
208+ */
209+ public abstract void setPaintMode();
210+
211+ /**
212+ * Sets the paint mode of this graphics context to alternate between
213+ * this graphics context's current color and the new specified color.
214+ * This specifies that logical pixel operations are performed in the
215+ * XOR mode, which alternates pixels between the current color and
216+ * a specified XOR color.
217+ * <p>
218+ * When drawing operations are performed, pixels which are the
219+ * current color are changed to the specified color, and vice versa.
220+ * <p>
221+ * Pixels that are of colors other than those two colors are changed
222+ * in an unpredictable but reversible manner; if the same figure is
223+ * drawn twice, then all pixels are restored to their original values.
224+ * @param c1 the XOR alternation color
225+ */
226+ public abstract void setXORMode(Color c1);
227+
228+ /**
229+ * Gets the current font.
230+ * @return this graphics context's current font.
231+ * @see java.awt.Font
232+ * @see java.awt.Graphics#setFont(Font)
233+ */
234+ public abstract Font getFont();
235+
236+ /**
237+ * Sets this graphics context's font to the specified font.
238+ * All subsequent text operations using this graphics context
239+ * use this font. A null argument is silently ignored.
240+ * @param font the font.
241+ * @see java.awt.Graphics#getFont
242+ * @see java.awt.Graphics#drawString(java.lang.String, int, int)
243+ * @see java.awt.Graphics#drawBytes(byte[], int, int, int, int)
244+ * @see java.awt.Graphics#drawChars(char[], int, int, int, int)
245+ */
246+ public abstract void setFont(Font font);
247+
248+ /**
249+ * Gets the font metrics of the current font.
250+ * @return the font metrics of this graphics
251+ * context's current font.
252+ * @see java.awt.Graphics#getFont
253+ * @see java.awt.FontMetrics
254+ * @see java.awt.Graphics#getFontMetrics(Font)
255+ */
256+ public FontMetrics getFontMetrics() {
257+ return getFontMetrics(getFont());
258+ }
259+
260+ /**
261+ * Gets the font metrics for the specified font.
262+ * @return the font metrics for the specified font.
263+ * @param f the specified font
264+ * @see java.awt.Graphics#getFont
265+ * @see java.awt.FontMetrics
266+ * @see java.awt.Graphics#getFontMetrics()
267+ */
268+ public abstract FontMetrics getFontMetrics(Font f);
269+
270+
271+ /**
272+ * Returns the bounding rectangle of the current clipping area.
273+ * This method refers to the user clip, which is independent of the
274+ * clipping associated with device bounds and window visibility.
275+ * If no clip has previously been set, or if the clip has been
276+ * cleared using <code>setClip(null)</code>, this method returns
277+ * <code>null</code>.
278+ * The coordinates in the rectangle are relative to the coordinate
279+ * system origin of this graphics context.
280+ * @return the bounding rectangle of the current clipping area,
281+ * or <code>null</code> if no clip is set.
282+ * @see java.awt.Graphics#getClip
283+ * @see java.awt.Graphics#clipRect
284+ * @see java.awt.Graphics#setClip(int, int, int, int)
285+ * @see java.awt.Graphics#setClip(Shape)
286+ * @since JDK1.1
287+ */
288+ public abstract Rectangle getClipBounds();
289+
290+ /**
291+ * Intersects the current clip with the specified rectangle.
292+ * The resulting clipping area is the intersection of the current
293+ * clipping area and the specified rectangle. If there is no
294+ * current clipping area, either because the clip has never been
295+ * set, or the clip has been cleared using <code>setClip(null)</code>,
296+ * the specified rectangle becomes the new clip.
297+ * This method sets the user clip, which is independent of the
298+ * clipping associated with device bounds and window visibility.
299+ * This method can only be used to make the current clip smaller.
300+ * To set the current clip larger, use any of the setClip methods.
301+ * Rendering operations have no effect outside of the clipping area.
302+ * @param x the x coordinate of the rectangle to intersect the clip with
303+ * @param y the y coordinate of the rectangle to intersect the clip with
304+ * @param width the width of the rectangle to intersect the clip with
305+ * @param height the height of the rectangle to intersect the clip with
306+ * @see #setClip(int, int, int, int)
307+ * @see #setClip(Shape)
308+ */
309+ public abstract void clipRect(int x, int y, int width, int height);
310+
311+ /**
312+ * Sets the current clip to the rectangle specified by the given
313+ * coordinates. This method sets the user clip, which is
314+ * independent of the clipping associated with device bounds
315+ * and window visibility.
316+ * Rendering operations have no effect outside of the clipping area.
317+ * @param x the <i>x</i> coordinate of the new clip rectangle.
318+ * @param y the <i>y</i> coordinate of the new clip rectangle.
319+ * @param width the width of the new clip rectangle.
320+ * @param height the height of the new clip rectangle.
321+ * @see java.awt.Graphics#clipRect
322+ * @see java.awt.Graphics#setClip(Shape)
323+ * @see java.awt.Graphics#getClip
324+ * @since JDK1.1
325+ */
326+ public abstract void setClip(int x, int y, int width, int height);
327+
328+ /**
329+ * Gets the current clipping area.
330+ * This method returns the user clip, which is independent of the
331+ * clipping associated with device bounds and window visibility.
332+ * If no clip has previously been set, or if the clip has been
333+ * cleared using <code>setClip(null)</code>, this method returns
334+ * <code>null</code>.
335+ * @return a <code>Shape</code> object representing the
336+ * current clipping area, or <code>null</code> if
337+ * no clip is set.
338+ * @see java.awt.Graphics#getClipBounds
339+ * @see java.awt.Graphics#clipRect
340+ * @see java.awt.Graphics#setClip(int, int, int, int)
341+ * @see java.awt.Graphics#setClip(Shape)
342+ * @since JDK1.1
343+ */
344+ public abstract Shape getClip();
345+
346+ /**
347+ * Sets the current clipping area to an arbitrary clip shape.
348+ * Not all objects that implement the <code>Shape</code>
349+ * interface can be used to set the clip. The only
350+ * <code>Shape</code> objects that are guaranteed to be
351+ * supported are <code>Shape</code> objects that are
352+ * obtained via the <code>getClip</code> method and via
353+ * <code>Rectangle</code> objects. This method sets the
354+ * user clip, which is independent of the clipping associated
355+ * with device bounds and window visibility.
356+ * @param clip the <code>Shape</code> to use to set the clip
357+ * @see java.awt.Graphics#getClip()
358+ * @see java.awt.Graphics#clipRect
359+ * @see java.awt.Graphics#setClip(int, int, int, int)
360+ * @since JDK1.1
361+ */
362+ public abstract void setClip(Shape clip);
363+
364+ /**
365+ * Copies an area of the component by a distance specified by
366+ * <code>dx</code> and <code>dy</code>. From the point specified
367+ * by <code>x</code> and <code>y</code>, this method
368+ * copies downwards and to the right. To copy an area of the
369+ * component to the left or upwards, specify a negative value for
370+ * <code>dx</code> or <code>dy</code>.
371+ * If a portion of the source rectangle lies outside the bounds
372+ * of the component, or is obscured by another window or component,
373+ * <code>copyArea</code> will be unable to copy the associated
374+ * pixels. The area that is omitted can be refreshed by calling
375+ * the component's <code>paint</code> method.
376+ * @param x the <i>x</i> coordinate of the source rectangle.
377+ * @param y the <i>y</i> coordinate of the source rectangle.
378+ * @param width the width of the source rectangle.
379+ * @param height the height of the source rectangle.
380+ * @param dx the horizontal distance to copy the pixels.
381+ * @param dy the vertical distance to copy the pixels.
382+ */
383+ public abstract void copyArea(int x, int y, int width, int height,
384+ int dx, int dy);
385+
386+ /**
387+ * Draws a line, using the current color, between the points
388+ * <code>(x1,&nbsp;y1)</code> and <code>(x2,&nbsp;y2)</code>
389+ * in this graphics context's coordinate system.
390+ * @param x1 the first point's <i>x</i> coordinate.
391+ * @param y1 the first point's <i>y</i> coordinate.
392+ * @param x2 the second point's <i>x</i> coordinate.
393+ * @param y2 the second point's <i>y</i> coordinate.
394+ */
395+ public abstract void drawLine(int x1, int y1, int x2, int y2);
396+
397+ /**
398+ * Fills the specified rectangle.
399+ * The left and right edges of the rectangle are at
400+ * <code>x</code> and <code>x&nbsp;+&nbsp;width&nbsp;-&nbsp;1</code>.
401+ * The top and bottom edges are at
402+ * <code>y</code> and <code>y&nbsp;+&nbsp;height&nbsp;-&nbsp;1</code>.
403+ * The resulting rectangle covers an area
404+ * <code>width</code> pixels wide by
405+ * <code>height</code> pixels tall.
406+ * The rectangle is filled using the graphics context's current color.
407+ * @param x the <i>x</i> coordinate
408+ * of the rectangle to be filled.
409+ * @param y the <i>y</i> coordinate
410+ * of the rectangle to be filled.
411+ * @param width the width of the rectangle to be filled.
412+ * @param height the height of the rectangle to be filled.
413+ * @see java.awt.Graphics#clearRect
414+ * @see java.awt.Graphics#drawRect
415+ */
416+ public abstract void fillRect(int x, int y, int width, int height);
417+
418+ /**
419+ * Draws the outline of the specified rectangle.
420+ * The left and right edges of the rectangle are at
421+ * <code>x</code> and <code>x&nbsp;+&nbsp;width</code>.
422+ * The top and bottom edges are at
423+ * <code>y</code> and <code>y&nbsp;+&nbsp;height</code>.
424+ * The rectangle is drawn using the graphics context's current color.
425+ * @param x the <i>x</i> coordinate
426+ * of the rectangle to be drawn.
427+ * @param y the <i>y</i> coordinate
428+ * of the rectangle to be drawn.
429+ * @param width the width of the rectangle to be drawn.
430+ * @param height the height of the rectangle to be drawn.
431+ * @see java.awt.Graphics#fillRect
432+ * @see java.awt.Graphics#clearRect
433+ */
434+ public void drawRect(int x, int y, int width, int height) {
435+ if ((width < 0) || (height < 0)) {
436+ return;
437+ }
438+
439+ if (height == 0 || width == 0) {
440+ drawLine(x, y, x + width, y + height);
441+ } else {
442+ drawLine(x, y, x + width - 1, y);
443+ drawLine(x + width, y, x + width, y + height - 1);
444+ drawLine(x + width, y + height, x + 1, y + height);
445+ drawLine(x, y + height, x, y + 1);
446+ }
447+ }
448+
449+ /**
450+ * Clears the specified rectangle by filling it with the background
451+ * color of the current drawing surface. This operation does not
452+ * use the current paint mode.
453+ * <p>
454+ * Beginning with Java&nbsp;1.1, the background color
455+ * of offscreen images may be system dependent. Applications should
456+ * use <code>setColor</code> followed by <code>fillRect</code> to
457+ * ensure that an offscreen image is cleared to a specific color.
458+ * @param x the <i>x</i> coordinate of the rectangle to clear.
459+ * @param y the <i>y</i> coordinate of the rectangle to clear.
460+ * @param width the width of the rectangle to clear.
461+ * @param height the height of the rectangle to clear.
462+ * @see java.awt.Graphics#fillRect(int, int, int, int)
463+ * @see java.awt.Graphics#drawRect
464+ * @see java.awt.Graphics#setColor(java.awt.Color)
465+ * @see java.awt.Graphics#setPaintMode
466+ * @see java.awt.Graphics#setXORMode(java.awt.Color)
467+ */
468+ public abstract void clearRect(int x, int y, int width, int height);
469+
470+ /**
471+ * Draws an outlined round-cornered rectangle using this graphics
472+ * context's current color. The left and right edges of the rectangle
473+ * are at <code>x</code> and <code>x&nbsp;+&nbsp;width</code>,
474+ * respectively. The top and bottom edges of the rectangle are at
475+ * <code>y</code> and <code>y&nbsp;+&nbsp;height</code>.
476+ * @param x the <i>x</i> coordinate of the rectangle to be drawn.
477+ * @param y the <i>y</i> coordinate of the rectangle to be drawn.
478+ * @param width the width of the rectangle to be drawn.
479+ * @param height the height of the rectangle to be drawn.
480+ * @param arcWidth the horizontal diameter of the arc
481+ * at the four corners.
482+ * @param arcHeight the vertical diameter of the arc
483+ * at the four corners.
484+ * @see java.awt.Graphics#fillRoundRect
485+ */
486+ public abstract void drawRoundRect(int x, int y, int width, int height,
487+ int arcWidth, int arcHeight);
488+
489+ /**
490+ * Fills the specified rounded corner rectangle with the current color.
491+ * The left and right edges of the rectangle
492+ * are at <code>x</code> and <code>x&nbsp;+&nbsp;width&nbsp;-&nbsp;1</code>,
493+ * respectively. The top and bottom edges of the rectangle are at
494+ * <code>y</code> and <code>y&nbsp;+&nbsp;height&nbsp;-&nbsp;1</code>.
495+ * @param x the <i>x</i> coordinate of the rectangle to be filled.
496+ * @param y the <i>y</i> coordinate of the rectangle to be filled.
497+ * @param width the width of the rectangle to be filled.
498+ * @param height the height of the rectangle to be filled.
499+ * @param arcWidth the horizontal diameter
500+ * of the arc at the four corners.
501+ * @param arcHeight the vertical diameter
502+ * of the arc at the four corners.
503+ * @see java.awt.Graphics#drawRoundRect
504+ */
505+ public abstract void fillRoundRect(int x, int y, int width, int height,
506+ int arcWidth, int arcHeight);
507+
508+ /**
509+ * Draws a 3-D highlighted outline of the specified rectangle.
510+ * The edges of the rectangle are highlighted so that they
511+ * appear to be beveled and lit from the upper left corner.
512+ * <p>
513+ * The colors used for the highlighting effect are determined
514+ * based on the current color.
515+ * The resulting rectangle covers an area that is
516+ * <code>width&nbsp;+&nbsp;1</code> pixels wide
517+ * by <code>height&nbsp;+&nbsp;1</code> pixels tall.
518+ * @param x the <i>x</i> coordinate of the rectangle to be drawn.
519+ * @param y the <i>y</i> coordinate of the rectangle to be drawn.
520+ * @param width the width of the rectangle to be drawn.
521+ * @param height the height of the rectangle to be drawn.
522+ * @param raised a boolean that determines whether the rectangle
523+ * appears to be raised above the surface
524+ * or sunk into the surface.
525+ * @see java.awt.Graphics#fill3DRect
526+ */
527+ public void draw3DRect(int x, int y, int width, int height,
528+ boolean raised) {
529+ Color c = getColor();
530+ Color brighter = c.brighter();
531+ Color darker = c.darker();
532+
533+ setColor(raised ? brighter : darker);
534+ drawLine(x, y, x, y + height);
535+ drawLine(x + 1, y, x + width - 1, y);
536+ setColor(raised ? darker : brighter);
537+ drawLine(x + 1, y + height, x + width, y + height);
538+ drawLine(x + width, y, x + width, y + height - 1);
539+ setColor(c);
540+ }
541+
542+ /**
543+ * Paints a 3-D highlighted rectangle filled with the current color.
544+ * The edges of the rectangle will be highlighted so that it appears
545+ * as if the edges were beveled and lit from the upper left corner.
546+ * The colors used for the highlighting effect will be determined from
547+ * the current color.
548+ * @param x the <i>x</i> coordinate of the rectangle to be filled.
549+ * @param y the <i>y</i> coordinate of the rectangle to be filled.
550+ * @param width the width of the rectangle to be filled.
551+ * @param height the height of the rectangle to be filled.
552+ * @param raised a boolean value that determines whether the
553+ * rectangle appears to be raised above the surface
554+ * or etched into the surface.
555+ * @see java.awt.Graphics#draw3DRect
556+ */
557+ public void fill3DRect(int x, int y, int width, int height,
558+ boolean raised) {
559+ Color c = getColor();
560+ Color brighter = c.brighter();
561+ Color darker = c.darker();
562+
563+ if (!raised) {
564+ setColor(darker);
565+ }
566+ fillRect(x+1, y+1, width-2, height-2);
567+ setColor(raised ? brighter : darker);
568+ drawLine(x, y, x, y + height - 1);
569+ drawLine(x + 1, y, x + width - 2, y);
570+ setColor(raised ? darker : brighter);
571+ drawLine(x + 1, y + height - 1, x + width - 1, y + height - 1);
572+ drawLine(x + width - 1, y, x + width - 1, y + height - 2);
573+ setColor(c);
574+ }
575+
576+ /**
577+ * Draws the outline of an oval.
578+ * The result is a circle or ellipse that fits within the
579+ * rectangle specified by the <code>x</code>, <code>y</code>,
580+ * <code>width</code>, and <code>height</code> arguments.
581+ * <p>
582+ * The oval covers an area that is
583+ * <code>width&nbsp;+&nbsp;1</code> pixels wide
584+ * and <code>height&nbsp;+&nbsp;1</code> pixels tall.
585+ * @param x the <i>x</i> coordinate of the upper left
586+ * corner of the oval to be drawn.
587+ * @param y the <i>y</i> coordinate of the upper left
588+ * corner of the oval to be drawn.
589+ * @param width the width of the oval to be drawn.
590+ * @param height the height of the oval to be drawn.
591+ * @see java.awt.Graphics#fillOval
592+ */
593+ public abstract void drawOval(int x, int y, int width, int height);
594+
595+ /**
596+ * Fills an oval bounded by the specified rectangle with the
597+ * current color.
598+ * @param x the <i>x</i> coordinate of the upper left corner
599+ * of the oval to be filled.
600+ * @param y the <i>y</i> coordinate of the upper left corner
601+ * of the oval to be filled.
602+ * @param width the width of the oval to be filled.
603+ * @param height the height of the oval to be filled.
604+ * @see java.awt.Graphics#drawOval
605+ */
606+ public abstract void fillOval(int x, int y, int width, int height);
607+
608+ /**
609+ * Draws the outline of a circular or elliptical arc
610+ * covering the specified rectangle.
611+ * <p>
612+ * The resulting arc begins at <code>startAngle</code> and extends
613+ * for <code>arcAngle</code> degrees, using the current color.
614+ * Angles are interpreted such that 0&nbsp;degrees
615+ * is at the 3&nbsp;o'clock position.
616+ * A positive value indicates a counter-clockwise rotation
617+ * while a negative value indicates a clockwise rotation.
618+ * <p>
619+ * The center of the arc is the center of the rectangle whose origin
620+ * is (<i>x</i>,&nbsp;<i>y</i>) and whose size is specified by the
621+ * <code>width</code> and <code>height</code> arguments.
622+ * <p>
623+ * The resulting arc covers an area
624+ * <code>width&nbsp;+&nbsp;1</code> pixels wide
625+ * by <code>height&nbsp;+&nbsp;1</code> pixels tall.
626+ * <p>
627+ * The angles are specified relative to the non-square extents of
628+ * the bounding rectangle such that 45 degrees always falls on the
629+ * line from the center of the ellipse to the upper right corner of
630+ * the bounding rectangle. As a result, if the bounding rectangle is
631+ * noticeably longer in one axis than the other, the angles to the
632+ * start and end of the arc segment will be skewed farther along the
633+ * longer axis of the bounds.
634+ * @param x the <i>x</i> coordinate of the
635+ * upper-left corner of the arc to be drawn.
636+ * @param y the <i>y</i> coordinate of the
637+ * upper-left corner of the arc to be drawn.
638+ * @param width the width of the arc to be drawn.
639+ * @param height the height of the arc to be drawn.
640+ * @param startAngle the beginning angle.
641+ * @param arcAngle the angular extent of the arc,
642+ * relative to the start angle.
643+ * @see java.awt.Graphics#fillArc
644+ */
645+ public abstract void drawArc(int x, int y, int width, int height,
646+ int startAngle, int arcAngle);
647+
648+ /**
649+ * Fills a circular or elliptical arc covering the specified rectangle.
650+ * <p>
651+ * The resulting arc begins at <code>startAngle</code> and extends
652+ * for <code>arcAngle</code> degrees.
653+ * Angles are interpreted such that 0&nbsp;degrees
654+ * is at the 3&nbsp;o'clock position.
655+ * A positive value indicates a counter-clockwise rotation
656+ * while a negative value indicates a clockwise rotation.
657+ * <p>
658+ * The center of the arc is the center of the rectangle whose origin
659+ * is (<i>x</i>,&nbsp;<i>y</i>) and whose size is specified by the
660+ * <code>width</code> and <code>height</code> arguments.
661+ * <p>
662+ * The resulting arc covers an area
663+ * <code>width&nbsp;+&nbsp;1</code> pixels wide
664+ * by <code>height&nbsp;+&nbsp;1</code> pixels tall.
665+ * <p>
666+ * The angles are specified relative to the non-square extents of
667+ * the bounding rectangle such that 45 degrees always falls on the
668+ * line from the center of the ellipse to the upper right corner of
669+ * the bounding rectangle. As a result, if the bounding rectangle is
670+ * noticeably longer in one axis than the other, the angles to the
671+ * start and end of the arc segment will be skewed farther along the
672+ * longer axis of the bounds.
673+ * @param x the <i>x</i> coordinate of the
674+ * upper-left corner of the arc to be filled.
675+ * @param y the <i>y</i> coordinate of the
676+ * upper-left corner of the arc to be filled.
677+ * @param width the width of the arc to be filled.
678+ * @param height the height of the arc to be filled.
679+ * @param startAngle the beginning angle.
680+ * @param arcAngle the angular extent of the arc,
681+ * relative to the start angle.
682+ * @see java.awt.Graphics#drawArc
683+ */
684+ public abstract void fillArc(int x, int y, int width, int height,
685+ int startAngle, int arcAngle);
686+
687+ /**
688+ * Draws a sequence of connected lines defined by
689+ * arrays of <i>x</i> and <i>y</i> coordinates.
690+ * Each pair of (<i>x</i>,&nbsp;<i>y</i>) coordinates defines a point.
691+ * The figure is not closed if the first point
692+ * differs from the last point.
693+ * @param xPoints an array of <i>x</i> points
694+ * @param yPoints an array of <i>y</i> points
695+ * @param nPoints the total number of points
696+ * @see java.awt.Graphics#drawPolygon(int[], int[], int)
697+ * @since JDK1.1
698+ */
699+ public abstract void drawPolyline(int xPoints[], int yPoints[],
700+ int nPoints);
701+
702+ /**
703+ * Draws a closed polygon defined by
704+ * arrays of <i>x</i> and <i>y</i> coordinates.
705+ * Each pair of (<i>x</i>,&nbsp;<i>y</i>) coordinates defines a point.
706+ * <p>
707+ * This method draws the polygon defined by <code>nPoint</code> line
708+ * segments, where the first <code>nPoint&nbsp;-&nbsp;1</code>
709+ * line segments are line segments from
710+ * <code>(xPoints[i&nbsp;-&nbsp;1],&nbsp;yPoints[i&nbsp;-&nbsp;1])</code>
711+ * to <code>(xPoints[i],&nbsp;yPoints[i])</code>, for
712+ * 1&nbsp;&le;&nbsp;<i>i</i>&nbsp;&le;&nbsp;<code>nPoints</code>.
713+ * The figure is automatically closed by drawing a line connecting
714+ * the final point to the first point, if those points are different.
715+ * @param xPoints a an array of <code>x</code> coordinates.
716+ * @param yPoints a an array of <code>y</code> coordinates.
717+ * @param nPoints a the total number of points.
718+ * @see java.awt.Graphics#fillPolygon
719+ * @see java.awt.Graphics#drawPolyline
720+ */
721+ public abstract void drawPolygon(int xPoints[], int yPoints[],
722+ int nPoints);
723+
724+ /**
725+ * Draws the outline of a polygon defined by the specified
726+ * <code>Polygon</code> object.
727+ * @param p the polygon to draw.
728+ * @see java.awt.Graphics#fillPolygon
729+ * @see java.awt.Graphics#drawPolyline
730+ */
731+ public void drawPolygon(Polygon p) {
732+ drawPolygon(p.xpoints, p.ypoints, p.npoints);
733+ }
734+
735+ /**
736+ * Fills a closed polygon defined by
737+ * arrays of <i>x</i> and <i>y</i> coordinates.
738+ * <p>
739+ * This method draws the polygon defined by <code>nPoint</code> line
740+ * segments, where the first <code>nPoint&nbsp;-&nbsp;1</code>
741+ * line segments are line segments from
742+ * <code>(xPoints[i&nbsp;-&nbsp;1],&nbsp;yPoints[i&nbsp;-&nbsp;1])</code>
743+ * to <code>(xPoints[i],&nbsp;yPoints[i])</code>, for
744+ * 1&nbsp;&le;&nbsp;<i>i</i>&nbsp;&le;&nbsp;<code>nPoints</code>.
745+ * The figure is automatically closed by drawing a line connecting
746+ * the final point to the first point, if those points are different.
747+ * <p>
748+ * The area inside the polygon is defined using an
749+ * even-odd fill rule, also known as the alternating rule.
750+ * @param xPoints a an array of <code>x</code> coordinates.
751+ * @param yPoints a an array of <code>y</code> coordinates.
752+ * @param nPoints a the total number of points.
753+ * @see java.awt.Graphics#drawPolygon(int[], int[], int)
754+ */
755+ public abstract void fillPolygon(int xPoints[], int yPoints[],
756+ int nPoints);
757+
758+ /**
759+ * Fills the polygon defined by the specified Polygon object with
760+ * the graphics context's current color.
761+ * <p>
762+ * The area inside the polygon is defined using an
763+ * even-odd fill rule, also known as the alternating rule.
764+ * @param p the polygon to fill.
765+ * @see java.awt.Graphics#drawPolygon(int[], int[], int)
766+ */
767+ public void fillPolygon(Polygon p) {
768+ fillPolygon(p.xpoints, p.ypoints, p.npoints);
769+ }
770+
771+ /**
772+ * Draws the text given by the specified string, using this
773+ * graphics context's current font and color. The baseline of the
774+ * leftmost character is at position (<i>x</i>,&nbsp;<i>y</i>) in this
775+ * graphics context's coordinate system.
776+ * @param str the string to be drawn.
777+ * @param x the <i>x</i> coordinate.
778+ * @param y the <i>y</i> coordinate.
779+ * @throws NullPointerException if <code>str</code> is <code>null</code>.
780+ * @see java.awt.Graphics#drawBytes
781+ * @see java.awt.Graphics#drawChars
782+ */
783+ public abstract void drawString(String str, int x, int y);
784+
785+ /**
786+ * Renders the text of the specified iterator applying its attributes
787+ * in accordance with the specification of the
788+ * {@link java.awt.font.TextAttribute TextAttribute} class.
789+ * <p>
790+ * The baseline of the leftmost character is at position
791+ * (<i>x</i>,&nbsp;<i>y</i>) in this graphics context's coordinate system.
792+ * @param iterator the iterator whose text is to be drawn
793+ * @param x the <i>x</i> coordinate.
794+ * @param y the <i>y</i> coordinate.
795+ * @throws NullPointerException if <code>iterator</code> is
796+ * <code>null</code>.
797+ * @see java.awt.Graphics#drawBytes
798+ * @see java.awt.Graphics#drawChars
799+ */
800+ public abstract void drawString(AttributedCharacterIterator iterator,
801+ int x, int y);
802+
803+ /**
804+ * Draws the text given by the specified character array, using this
805+ * graphics context's current font and color. The baseline of the
806+ * first character is at position (<i>x</i>,&nbsp;<i>y</i>) in this
807+ * graphics context's coordinate system.
808+ * @param data the array of characters to be drawn
809+ * @param offset the start offset in the data
810+ * @param length the number of characters to be drawn
811+ * @param x the <i>x</i> coordinate of the baseline of the text
812+ * @param y the <i>y</i> coordinate of the baseline of the text
813+ * @throws NullPointerException if <code>data</code> is <code>null</code>.
814+ * @throws IndexOutOfBoundsException if <code>offset</code> or
815+ * <code>length</code>is less than zero, or
816+ * <code>offset+length</code> is greater than the length of the
817+ * <code>data</code> array.
818+ * @see java.awt.Graphics#drawBytes
819+ * @see java.awt.Graphics#drawString
820+ */
821+ public void drawChars(char data[], int offset, int length, int x, int y) {
822+ drawString(new String(data, offset, length), x, y);
823+ }
824+
825+ /**
826+ * Draws the text given by the specified byte array, using this
827+ * graphics context's current font and color. The baseline of the
828+ * first character is at position (<i>x</i>,&nbsp;<i>y</i>) in this
829+ * graphics context's coordinate system.
830+ * <p>
831+ * Use of this method is not recommended as each byte is interpreted
832+ * as a Unicode code point in the range 0 to 255, and so can only be
833+ * used to draw Latin characters in that range.
834+ * @param data the data to be drawn
835+ * @param offset the start offset in the data
836+ * @param length the number of bytes that are drawn
837+ * @param x the <i>x</i> coordinate of the baseline of the text
838+ * @param y the <i>y</i> coordinate of the baseline of the text
839+ * @throws NullPointerException if <code>data</code> is <code>null</code>.
840+ * @throws IndexOutOfBoundsException if <code>offset</code> or
841+ * <code>length</code>is less than zero, or <code>offset+length</code>
842+ * is greater than the length of the <code>data</code> array.
843+ * @see java.awt.Graphics#drawChars
844+ * @see java.awt.Graphics#drawString
845+ */
846+ public void drawBytes(byte data[], int offset, int length, int x, int y) {
847+ drawString(new String(data, 0, offset, length), x, y);
848+ }
849+
850+ /**
851+ * Draws as much of the specified image as is currently available.
852+ * The image is drawn with its top-left corner at
853+ * (<i>x</i>,&nbsp;<i>y</i>) in this graphics context's coordinate
854+ * space. Transparent pixels in the image do not affect whatever
855+ * pixels are already there.
856+ * <p>
857+ * This method returns immediately in all cases, even if the
858+ * complete image has not yet been loaded, and it has not been dithered
859+ * and converted for the current output device.
860+ * <p>
861+ * If the image has completely loaded and its pixels are
862+ * no longer being changed, then
863+ * <code>drawImage</code> returns <code>true</code>.
864+ * Otherwise, <code>drawImage</code> returns <code>false</code>
865+ * and as more of
866+ * the image becomes available
867+ * or it is time to draw another frame of animation,
868+ * the process that loads the image notifies
869+ * the specified image observer.
870+ * @param img the specified image to be drawn. This method does
871+ * nothing if <code>img</code> is null.
872+ * @param x the <i>x</i> coordinate.
873+ * @param y the <i>y</i> coordinate.
874+ * @param observer object to be notified as more of
875+ * the image is converted.
876+ * @return <code>false</code> if the image pixels are still changing;
877+ * <code>true</code> otherwise.
878+ * @see java.awt.Image
879+ * @see java.awt.image.ImageObserver
880+ * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
881+ */
882+ public abstract boolean drawImage(Image img, int x, int y,
883+ ImageObserver observer);
884+
885+ /**
886+ * Draws as much of the specified image as has already been scaled
887+ * to fit inside the specified rectangle.
888+ * <p>
889+ * The image is drawn inside the specified rectangle of this
890+ * graphics context's coordinate space, and is scaled if
891+ * necessary. Transparent pixels do not affect whatever pixels
892+ * are already there.
893+ * <p>
894+ * This method returns immediately in all cases, even if the
895+ * entire image has not yet been scaled, dithered, and converted
896+ * for the current output device.
897+ * If the current output representation is not yet complete, then
898+ * <code>drawImage</code> returns <code>false</code>. As more of
899+ * the image becomes available, the process that loads the image notifies
900+ * the image observer by calling its <code>imageUpdate</code> method.
901+ * <p>
902+ * A scaled version of an image will not necessarily be
903+ * available immediately just because an unscaled version of the
904+ * image has been constructed for this output device. Each size of
905+ * the image may be cached separately and generated from the original
906+ * data in a separate image production sequence.
907+ * @param img the specified image to be drawn. This method does
908+ * nothing if <code>img</code> is null.
909+ * @param x the <i>x</i> coordinate.
910+ * @param y the <i>y</i> coordinate.
911+ * @param width the width of the rectangle.
912+ * @param height the height of the rectangle.
913+ * @param observer object to be notified as more of
914+ * the image is converted.
915+ * @return <code>false</code> if the image pixels are still changing;
916+ * <code>true</code> otherwise.
917+ * @see java.awt.Image
918+ * @see java.awt.image.ImageObserver
919+ * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
920+ */
921+ public abstract boolean drawImage(Image img, int x, int y,
922+ int width, int height,
923+ ImageObserver observer);
924+
925+ /**
926+ * Draws as much of the specified image as is currently available.
927+ * The image is drawn with its top-left corner at
928+ * (<i>x</i>,&nbsp;<i>y</i>) in this graphics context's coordinate
929+ * space. Transparent pixels are drawn in the specified
930+ * background color.
931+ * <p>
932+ * This operation is equivalent to filling a rectangle of the
933+ * width and height of the specified image with the given color and then
934+ * drawing the image on top of it, but possibly more efficient.
935+ * <p>
936+ * This method returns immediately in all cases, even if the
937+ * complete image has not yet been loaded, and it has not been dithered
938+ * and converted for the current output device.
939+ * <p>
940+ * If the image has completely loaded and its pixels are
941+ * no longer being changed, then
942+ * <code>drawImage</code> returns <code>true</code>.
943+ * Otherwise, <code>drawImage</code> returns <code>false</code>
944+ * and as more of
945+ * the image becomes available
946+ * or it is time to draw another frame of animation,
947+ * the process that loads the image notifies
948+ * the specified image observer.
949+ * @param img the specified image to be drawn. This method does
950+ * nothing if <code>img</code> is null.
951+ * @param x the <i>x</i> coordinate.
952+ * @param y the <i>y</i> coordinate.
953+ * @param bgcolor the background color to paint under the
954+ * non-opaque portions of the image.
955+ * @param observer object to be notified as more of
956+ * the image is converted.
957+ * @return <code>false</code> if the image pixels are still changing;
958+ * <code>true</code> otherwise.
959+ * @see java.awt.Image
960+ * @see java.awt.image.ImageObserver
961+ * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
962+ */
963+ public abstract boolean drawImage(Image img, int x, int y,
964+ Color bgcolor,
965+ ImageObserver observer);
966+
967+ /**
968+ * Draws as much of the specified image as has already been scaled
969+ * to fit inside the specified rectangle.
970+ * <p>
971+ * The image is drawn inside the specified rectangle of this
972+ * graphics context's coordinate space, and is scaled if
973+ * necessary. Transparent pixels are drawn in the specified
974+ * background color.
975+ * This operation is equivalent to filling a rectangle of the
976+ * width and height of the specified image with the given color and then
977+ * drawing the image on top of it, but possibly more efficient.
978+ * <p>
979+ * This method returns immediately in all cases, even if the
980+ * entire image has not yet been scaled, dithered, and converted
981+ * for the current output device.
982+ * If the current output representation is not yet complete then
983+ * <code>drawImage</code> returns <code>false</code>. As more of
984+ * the image becomes available, the process that loads the image notifies
985+ * the specified image observer.
986+ * <p>
987+ * A scaled version of an image will not necessarily be
988+ * available immediately just because an unscaled version of the
989+ * image has been constructed for this output device. Each size of
990+ * the image may be cached separately and generated from the original
991+ * data in a separate image production sequence.
992+ * @param img the specified image to be drawn. This method does
993+ * nothing if <code>img</code> is null.
994+ * @param x the <i>x</i> coordinate.
995+ * @param y the <i>y</i> coordinate.
996+ * @param width the width of the rectangle.
997+ * @param height the height of the rectangle.
998+ * @param bgcolor the background color to paint under the
999+ * non-opaque portions of the image.
1000+ * @param observer object to be notified as more of
1001+ * the image is converted.
1002+ * @return <code>false</code> if the image pixels are still changing;
1003+ * <code>true</code> otherwise.
1004+ * @see java.awt.Image
1005+ * @see java.awt.image.ImageObserver
1006+ * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
1007+ */
1008+ public abstract boolean drawImage(Image img, int x, int y,
1009+ int width, int height,
1010+ Color bgcolor,
1011+ ImageObserver observer);
1012+
1013+ /**
1014+ * Draws as much of the specified area of the specified image as is
1015+ * currently available, scaling it on the fly to fit inside the
1016+ * specified area of the destination drawable surface. Transparent pixels
1017+ * do not affect whatever pixels are already there.
1018+ * <p>
1019+ * This method returns immediately in all cases, even if the
1020+ * image area to be drawn has not yet been scaled, dithered, and converted
1021+ * for the current output device.
1022+ * If the current output representation is not yet complete then
1023+ * <code>drawImage</code> returns <code>false</code>. As more of
1024+ * the image becomes available, the process that loads the image notifies
1025+ * the specified image observer.
1026+ * <p>
1027+ * This method always uses the unscaled version of the image
1028+ * to render the scaled rectangle and performs the required
1029+ * scaling on the fly. It does not use a cached, scaled version
1030+ * of the image for this operation. Scaling of the image from source
1031+ * to destination is performed such that the first coordinate
1032+ * of the source rectangle is mapped to the first coordinate of
1033+ * the destination rectangle, and the second source coordinate is
1034+ * mapped to the second destination coordinate. The subimage is
1035+ * scaled and flipped as needed to preserve those mappings.
1036+ * @param img the specified image to be drawn. This method does
1037+ * nothing if <code>img</code> is null.
1038+ * @param dx1 the <i>x</i> coordinate of the first corner of the
1039+ * destination rectangle.
1040+ * @param dy1 the <i>y</i> coordinate of the first corner of the
1041+ * destination rectangle.
1042+ * @param dx2 the <i>x</i> coordinate of the second corner of the
1043+ * destination rectangle.
1044+ * @param dy2 the <i>y</i> coordinate of the second corner of the
1045+ * destination rectangle.
1046+ * @param sx1 the <i>x</i> coordinate of the first corner of the
1047+ * source rectangle.
1048+ * @param sy1 the <i>y</i> coordinate of the first corner of the
1049+ * source rectangle.
1050+ * @param sx2 the <i>x</i> coordinate of the second corner of the
1051+ * source rectangle.
1052+ * @param sy2 the <i>y</i> coordinate of the second corner of the
1053+ * source rectangle.
1054+ * @param observer object to be notified as more of the image is
1055+ * scaled and converted.
1056+ * @return <code>false</code> if the image pixels are still changing;
1057+ * <code>true</code> otherwise.
1058+ * @see java.awt.Image
1059+ * @see java.awt.image.ImageObserver
1060+ * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
1061+ * @since JDK1.1
1062+ */
1063+ public abstract boolean drawImage(Image img,
1064+ int dx1, int dy1, int dx2, int dy2,
1065+ int sx1, int sy1, int sx2, int sy2,
1066+ ImageObserver observer);
1067+
1068+ /**
1069+ * Draws as much of the specified area of the specified image as is
1070+ * currently available, scaling it on the fly to fit inside the
1071+ * specified area of the destination drawable surface.
1072+ * <p>
1073+ * Transparent pixels are drawn in the specified background color.
1074+ * This operation is equivalent to filling a rectangle of the
1075+ * width and height of the specified image with the given color and then
1076+ * drawing the image on top of it, but possibly more efficient.
1077+ * <p>
1078+ * This method returns immediately in all cases, even if the
1079+ * image area to be drawn has not yet been scaled, dithered, and converted
1080+ * for the current output device.
1081+ * If the current output representation is not yet complete then
1082+ * <code>drawImage</code> returns <code>false</code>. As more of
1083+ * the image becomes available, the process that loads the image notifies
1084+ * the specified image observer.
1085+ * <p>
1086+ * This method always uses the unscaled version of the image
1087+ * to render the scaled rectangle and performs the required
1088+ * scaling on the fly. It does not use a cached, scaled version
1089+ * of the image for this operation. Scaling of the image from source
1090+ * to destination is performed such that the first coordinate
1091+ * of the source rectangle is mapped to the first coordinate of
1092+ * the destination rectangle, and the second source coordinate is
1093+ * mapped to the second destination coordinate. The subimage is
1094+ * scaled and flipped as needed to preserve those mappings.
1095+ * @param img the specified image to be drawn. This method does
1096+ * nothing if <code>img</code> is null.
1097+ * @param dx1 the <i>x</i> coordinate of the first corner of the
1098+ * destination rectangle.
1099+ * @param dy1 the <i>y</i> coordinate of the first corner of the
1100+ * destination rectangle.
1101+ * @param dx2 the <i>x</i> coordinate of the second corner of the
1102+ * destination rectangle.
1103+ * @param dy2 the <i>y</i> coordinate of the second corner of the
1104+ * destination rectangle.
1105+ * @param sx1 the <i>x</i> coordinate of the first corner of the
1106+ * source rectangle.
1107+ * @param sy1 the <i>y</i> coordinate of the first corner of the
1108+ * source rectangle.
1109+ * @param sx2 the <i>x</i> coordinate of the second corner of the
1110+ * source rectangle.
1111+ * @param sy2 the <i>y</i> coordinate of the second corner of the
1112+ * source rectangle.
1113+ * @param bgcolor the background color to paint under the
1114+ * non-opaque portions of the image.
1115+ * @param observer object to be notified as more of the image is
1116+ * scaled and converted.
1117+ * @return <code>false</code> if the image pixels are still changing;
1118+ * <code>true</code> otherwise.
1119+ * @see java.awt.Image
1120+ * @see java.awt.image.ImageObserver
1121+ * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
1122+ * @since JDK1.1
1123+ */
1124+ public abstract boolean drawImage(Image img,
1125+ int dx1, int dy1, int dx2, int dy2,
1126+ int sx1, int sy1, int sx2, int sy2,
1127+ Color bgcolor,
1128+ ImageObserver observer);
1129+
1130+ /**
1131+ * Disposes of this graphics context and releases
1132+ * any system resources that it is using.
1133+ * A <code>Graphics</code> object cannot be used after
1134+ * <code>dispose</code>has been called.
1135+ * <p>
1136+ * When a Java program runs, a large number of <code>Graphics</code>
1137+ * objects can be created within a short time frame.
1138+ * Although the finalization process of the garbage collector
1139+ * also disposes of the same system resources, it is preferable
1140+ * to manually free the associated resources by calling this
1141+ * method rather than to rely on a finalization process which
1142+ * may not run to completion for a long period of time.
1143+ * <p>
1144+ * Graphics objects which are provided as arguments to the
1145+ * <code>paint</code> and <code>update</code> methods
1146+ * of components are automatically released by the system when
1147+ * those methods return. For efficiency, programmers should
1148+ * call <code>dispose</code> when finished using
1149+ * a <code>Graphics</code> object only if it was created
1150+ * directly from a component or another <code>Graphics</code> object.
1151+ * @see java.awt.Graphics#finalize
1152+ * @see java.awt.Component#paint
1153+ * @see java.awt.Component#update
1154+ * @see java.awt.Component#getGraphics
1155+ * @see java.awt.Graphics#create
1156+ */
1157+ public abstract void dispose();
1158+
1159+ /**
1160+ * Disposes of this graphics context once it is no longer referenced.
1161+ * @see #dispose
1162+ */
1163+ public void finalize() {
1164+ dispose();
1165+ }
1166+
1167+ /**
1168+ * Returns a <code>String</code> object representing this
1169+ * <code>Graphics</code> object's value.
1170+ * @return a string representation of this graphics context.
1171+ */
1172+ public String toString() {
1173+ return getClass().getName() + "[font=" + getFont() + ",color=" + getColor() + "]";
1174+ }
1175+
1176+ /**
1177+ * Returns the bounding rectangle of the current clipping area.
1178+ * @return the bounding rectangle of the current clipping area
1179+ * or <code>null</code> if no clip is set.
1180+ * @deprecated As of JDK version 1.1,
1181+ * replaced by <code>getClipBounds()</code>.
1182+ */
1183+ @Deprecated
1184+ public Rectangle getClipRect() {
1185+ return getClipBounds();
1186+ }
1187+
1188+ /**
1189+ * Returns true if the specified rectangular area might intersect
1190+ * the current clipping area.
1191+ * The coordinates of the specified rectangular area are in the
1192+ * user coordinate space and are relative to the coordinate
1193+ * system origin of this graphics context.
1194+ * This method may use an algorithm that calculates a result quickly
1195+ * but which sometimes might return true even if the specified
1196+ * rectangular area does not intersect the clipping area.
1197+ * The specific algorithm employed may thus trade off accuracy for
1198+ * speed, but it will never return false unless it can guarantee
1199+ * that the specified rectangular area does not intersect the
1200+ * current clipping area.
1201+ * The clipping area used by this method can represent the
1202+ * intersection of the user clip as specified through the clip
1203+ * methods of this graphics context as well as the clipping
1204+ * associated with the device or image bounds and window visibility.
1205+ *
1206+ * @param x the x coordinate of the rectangle to test against the clip
1207+ * @param y the y coordinate of the rectangle to test against the clip
1208+ * @param width the width of the rectangle to test against the clip
1209+ * @param height the height of the rectangle to test against the clip
1210+ * @return <code>true</code> if the specified rectangle intersects
1211+ * the bounds of the current clip; <code>false</code>
1212+ * otherwise.
1213+ */
1214+ public boolean hitClip(int x, int y, int width, int height) {
1215+ // Note, this implementation is not very efficient.
1216+ // Subclasses should override this method and calculate
1217+ // the results more directly.
1218+ Rectangle clipRect = getClipBounds();
1219+ if (clipRect == null) {
1220+ return true;
1221+ }
1222+ return clipRect.intersects(x, y, width, height);
1223+ }
1224+
1225+ /**
1226+ * Returns the bounding rectangle of the current clipping area.
1227+ * The coordinates in the rectangle are relative to the coordinate
1228+ * system origin of this graphics context. This method differs
1229+ * from {@link #getClipBounds() getClipBounds} in that an existing
1230+ * rectangle is used instead of allocating a new one.
1231+ * This method refers to the user clip, which is independent of the
1232+ * clipping associated with device bounds and window visibility.
1233+ * If no clip has previously been set, or if the clip has been
1234+ * cleared using <code>setClip(null)</code>, this method returns the
1235+ * specified <code>Rectangle</code>.
1236+ * @param r the rectangle where the current clipping area is
1237+ * copied to. Any current values in this rectangle are
1238+ * overwritten.
1239+ * @return the bounding rectangle of the current clipping area.
1240+ */
1241+ public Rectangle getClipBounds(Rectangle r) {
1242+ // Note, this implementation is not very efficient.
1243+ // Subclasses should override this method and avoid
1244+ // the allocation overhead of getClipBounds().
1245+ Rectangle clipRect = getClipBounds();
1246+ if (clipRect != null) {
1247+ r.x = clipRect.x;
1248+ r.y = clipRect.y;
1249+ r.width = clipRect.width;
1250+ r.height = clipRect.height;
1251+ } else if (r == null) {
1252+ throw new NullPointerException("null rectangle parameter");
1253+ }
1254+ return r;
1255+ }
1256+}