|
2
|
1 |
/*
|
|
5506
|
2 |
* Copyright (c) 1995, 2006, Oracle and/or its affiliates. All rights reserved.
|
|
2
|
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
|
|
5506
|
7 |
* published by the Free Software Foundation. Oracle designates this
|
|
2
|
8 |
* particular file as subject to the "Classpath" exception as provided
|
|
5506
|
9 |
* by Oracle in the LICENSE file that accompanied this code.
|
|
2
|
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 |
*
|
|
5506
|
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.
|
|
2
|
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:
|
|
21957
|
42 |
*
|
|
2
|
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:
|
|
21957
|
66 |
* <ul>
|
|
2
|
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.
|
|
21278
|
108 |
* This constructor is the default constructor for a graphics
|
|
2
|
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>, <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:
|
|
21957
|
139 |
*
|
|
2
|
140 |
* <ul>
|
|
|
141 |
* <li>
|
|
|
142 |
* The new graphics context is translated by (<i>x</i>, <i>y</i>).
|
|
|
143 |
* That is to say, the point (<code>0</code>, <code>0</code>) in the
|
|
|
144 |
* new graphics context is the same as (<i>x</i>, <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>, <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>, <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>, <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, y1)</code> and <code>(x2, 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 + width - 1</code>.
|
|
|
401 |
* The top and bottom edges are at
|
|
|
402 |
* <code>y</code> and <code>y + height - 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 + width</code>.
|
|
|
422 |
* The top and bottom edges are at
|
|
|
423 |
* <code>y</code> and <code>y + 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 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 + width</code>,
|
|
|
474 |
* respectively. The top and bottom edges of the rectangle are at
|
|
|
475 |
* <code>y</code> and <code>y + 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 + width - 1</code>,
|
|
|
493 |
* respectively. The top and bottom edges of the rectangle are at
|
|
|
494 |
* <code>y</code> and <code>y + height - 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 + 1</code> pixels wide
|
|
|
517 |
* by <code>height + 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 + 1</code> pixels wide
|
|
|
584 |
* and <code>height + 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 degrees
|
|
|
615 |
* is at the 3 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>, <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 + 1</code> pixels wide
|
|
|
625 |
* by <code>height + 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 degrees
|
|
|
654 |
* is at the 3 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>, <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 + 1</code> pixels wide
|
|
|
664 |
* by <code>height + 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>, <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>, <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 - 1</code>
|
|
|
709 |
* line segments are line segments from
|
|
|
710 |
* <code>(xPoints[i - 1], yPoints[i - 1])</code>
|
|
|
711 |
* to <code>(xPoints[i], yPoints[i])</code>, for
|
|
|
712 |
* 1 ≤ <i>i</i> ≤ <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 - 1</code>
|
|
|
741 |
* line segments are line segments from
|
|
|
742 |
* <code>(xPoints[i - 1], yPoints[i - 1])</code>
|
|
|
743 |
* to <code>(xPoints[i], yPoints[i])</code>, for
|
|
|
744 |
* 1 ≤ <i>i</i> ≤ <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>, <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>, <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>, <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>, <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>, <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>, <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 |
}
|