|
Modifier and Type |
Method and Description |
|
clearRect |
abstract void clearRect(int x,
int y,
int width,
int height)
Clears the specified rectangle by filling it with the background
color of the current drawing surface.
public abstract void clearRect(int x,
int y,
int width,
int height)
-
Clears the specified rectangle by filling it with the background
color of the current drawing surface. This operation does not
use the current paint mode.
Beginning with Java 1.1, the background color
of offscreen images may be system dependent. Applications should
use setColor followed by fillRect to
ensure that an offscreen image is cleared to a specific color.
- Parameters:
x - the x coordinate of the rectangle to clear.y - the y coordinate of the rectangle to clear.width - the width of the rectangle to clear.height - the height of the rectangle to clear.- See Also:
fillRect(int, int, int, int) ,
drawRect(int, int, int, int) ,
setColor(java.awt.Color) ,
setPaintMode() ,
setXORMode(java.awt.Color)
|
|
clipRect |
abstract void clipRect(int x,
int y,
int width,
int height)
Intersects the current clip with the specified rectangle.
public abstract void clipRect(int x,
int y,
int width,
int height)
-
Intersects the current clip with the specified rectangle.
The resulting clipping area is the intersection of the current
clipping area and the specified rectangle. If there is no
current clipping area, either because the clip has never been
set, or the clip has been cleared using setClip(null) ,
the specified rectangle becomes the new clip.
This method sets the user clip, which is independent of the
clipping associated with device bounds and window visibility.
This method can only be used to make the current clip smaller.
To set the current clip larger, use any of the setClip methods.
Rendering operations have no effect outside of the clipping area.
- Parameters:
x - the x coordinate of the rectangle to intersect the clip withy - the y coordinate of the rectangle to intersect the clip withwidth - the width of the rectangle to intersect the clip withheight - the height of the rectangle to intersect the clip with- See Also:
setClip(int, int, int, int) ,
setClip(Shape)
|
|
copyArea |
abstract void copyArea(int x,
int y,
int width,
int height,
int dx,
int dy)
Copies an area of the component by a distance specified by
dx and dy .
public abstract void copyArea(int x,
int y,
int width,
int height,
int dx,
int dy)
-
Copies an area of the component by a distance specified by
dx and dy . From the point specified
by x and y , this method
copies downwards and to the right. To copy an area of the
component to the left or upwards, specify a negative value for
dx or dy .
If a portion of the source rectangle lies outside the bounds
of the component, or is obscured by another window or component,
copyArea will be unable to copy the associated
pixels. The area that is omitted can be refreshed by calling
the component's paint method.
- Parameters:
x - the x coordinate of the source rectangle.y - the y coordinate of the source rectangle.width - the width of the source rectangle.height - the height of the source rectangle.dx - the horizontal distance to copy the pixels.dy - the vertical distance to copy the pixels.
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|
create |
Creates a new Graphics object that is
a copy of this Graphics object.
-
Creates a new Graphics object that is
a copy of this Graphics object.
- Returns:
- a new graphics context that is a copy of
this graphics context.
|
|
create |
Graphics create(int x,
int y,
int width,
int height)
Creates a new Graphics object based on this
Graphics object, but with a new translation and clip area.
public Graphics create(int x,
int y,
int width,
int height)
-
Creates a new Graphics object based on this
Graphics object, but with a new translation and clip area.
The new Graphics object has its origin
translated to the specified point ( x, y).
Its clip area is determined by the intersection of the original
clip area with the specified rectangle. The arguments are all
interpreted in the coordinate system of the original
Graphics object. The new graphics context is
identical to the original, except in two respects:
-
The new graphics context is translated by (x, y).
That is to say, the point (
0 , 0 ) in the
new graphics context is the same as (x, y) in
the original graphics context.
-
The new graphics context has an additional clipping rectangle, in
addition to whatever (translated) clipping rectangle it inherited
from the original graphics context. The origin of the new clipping
rectangle is at (
0 , 0 ), and its size
is specified by the width and height
arguments.
- Parameters:
x - the x coordinate.y - the y coordinate.width - the width of the clipping rectangle.height - the height of the clipping rectangle.
- Returns:
- a new graphics context.
- See Also:
translate(int, int) ,
clipRect(int, int, int, int)
|
|
dispose |
abstract void dispose()
Disposes of this graphics context and releases
any system resources that it is using.
public abstract void dispose()
-
Disposes of this graphics context and releases
any system resources that it is using.
A Graphics object cannot be used after
dispose has been called.
When a Java program runs, a large number of Graphics
objects can be created within a short time frame.
Although the finalization process of the garbage collector
also disposes of the same system resources, it is preferable
to manually free the associated resources by calling this
method rather than to rely on a finalization process which
may not run to completion for a long period of time.
Graphics objects which are provided as arguments to the
paint and update methods
of components are automatically released by the system when
those methods return. For efficiency, programmers should
call dispose when finished using
a Graphics object only if it was created
directly from a component or another Graphics object.
- See Also:
finalize() ,
Component.paint(java.awt.Graphics) ,
Component.update(java.awt.Graphics) ,
Component.getGraphics() ,
create()
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|
draw3DRect |
void draw3DRect(int x,
int y,
int width,
int height,
boolean raised)
Draws a 3-D highlighted outline of the specified rectangle.
public void draw3DRect(int x,
int y,
int width,
int height,
boolean raised)
-
Draws a 3-D highlighted outline of the specified rectangle.
The edges of the rectangle are highlighted so that they
appear to be beveled and lit from the upper left corner.
The colors used for the highlighting effect are determined
based on the current color.
The resulting rectangle covers an area that is
width + 1 pixels wide
by height + 1 pixels tall.
- Parameters:
x - the x coordinate of the rectangle to be drawn.y - the y coordinate of the rectangle to be drawn.width - the width of the rectangle to be drawn.height - the height of the rectangle to be drawn.raised - a boolean that determines whether the rectangle
appears to be raised above the surface
or sunk into the surface.- See Also:
fill3DRect(int, int, int, int, boolean)
|
|
drawArc |
abstract void drawArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
Draws the outline of a circular or elliptical arc
covering the specified rectangle.
public abstract void drawArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
-
Draws the outline of a circular or elliptical arc
covering the specified rectangle.
The resulting arc begins at startAngle and extends
for arcAngle degrees, using the current color.
Angles are interpreted such that 0 degrees
is at the 3 o'clock position.
A positive value indicates a counter-clockwise rotation
while a negative value indicates a clockwise rotation.
The center of the arc is the center of the rectangle whose origin
is (x, y) and whose size is specified by the
width and height arguments.
The resulting arc covers an area
width + 1 pixels wide
by height + 1 pixels tall.
The angles are specified relative to the non-square extents of
the bounding rectangle such that 45 degrees always falls on the
line from the center of the ellipse to the upper right corner of
the bounding rectangle. As a result, if the bounding rectangle is
noticeably longer in one axis than the other, the angles to the
start and end of the arc segment will be skewed farther along the
longer axis of the bounds.
- Parameters:
x - the x coordinate of the
upper-left corner of the arc to be drawn.y - the y coordinate of the
upper-left corner of the arc to be drawn.width - the width of the arc to be drawn.height - the height of the arc to be drawn.startAngle - the beginning angle.arcAngle - the angular extent of the arc,
relative to the start angle.- See Also:
fillArc(int, int, int, int, int, int)
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|
drawBytes |
void drawBytes(byte[] data,
int offset,
int length,
int x,
int y)
Draws the text given by the specified byte array, using this
graphics context's current font and color.
public void drawBytes(byte[] data,
int offset,
int length,
int x,
int y)
-
Draws the text given by the specified byte array, using this
graphics context's current font and color. The baseline of the
first character is at position ( x, y) in this
graphics context's coordinate system.
Use of this method is not recommended as each byte is interpreted
as a Unicode code point in the range 0 to 255, and so can only be
used to draw Latin characters in that range.
- Parameters:
data - the data to be drawnoffset - the start offset in the datalength - the number of bytes that are drawnx - the x coordinate of the baseline of the texty - the y coordinate of the baseline of the text
- Throws:
java.lang.NullPointerException - if data is null .
java.lang.IndexOutOfBoundsException - if offset or
length is less than zero, or offset+length
is greater than the length of the data array.- See Also:
drawChars(char[], int, int, int, int) ,
drawString(java.lang.String, int, int)
|
|
drawChars |
void drawChars(char[] data,
int offset,
int length,
int x,
int y)
Draws the text given by the specified character array, using this
graphics context's current font and color.
public void drawChars(char[] data,
int offset,
int length,
int x,
int y)
-
Draws the text given by the specified character array, using this
graphics context's current font and color. The baseline of the
first character is at position (x, y) in this
graphics context's coordinate system.
- Parameters:
data - the array of characters to be drawnoffset - the start offset in the datalength - the number of characters to be drawnx - the x coordinate of the baseline of the texty - the y coordinate of the baseline of the text
- Throws:
java.lang.NullPointerException - if data is null .
java.lang.IndexOutOfBoundsException - if offset or
length is less than zero, or
offset+length is greater than the length of the
data array.- See Also:
drawBytes(byte[], int, int, int, int) ,
drawString(java.lang.String, int, int)
|
|
drawImage |
abstract boolean drawImage(Image img,
int x,
int y,
Color bgcolor,
java.awt.image.ImageObserver observer)
Draws as much of the specified image as is currently available.
public abstract boolean drawImage( Image img,
int x,
int y,
Color bgcolor,
java.awt.image.ImageObserver observer)
-
Draws as much of the specified image as is currently available.
The image is drawn with its top-left corner at
( x, y) in this graphics context's coordinate
space. Transparent pixels are drawn in the specified
background color.
This operation is equivalent to filling a rectangle of the
width and height of the specified image with the given color and then
drawing the image on top of it, but possibly more efficient.
This method returns immediately in all cases, even if the
complete image has not yet been loaded, and it has not been dithered
and converted for the current output device.
If the image has completely loaded and its pixels are
no longer being changed, then
drawImage returns true .
Otherwise, drawImage returns false
and as more of
the image becomes available
or it is time to draw another frame of animation,
the process that loads the image notifies
the specified image observer.
- Parameters:
img - the specified image to be drawn. This method does
nothing if img is null.x - the x coordinate.y - the y coordinate.bgcolor - the background color to paint under the
non-opaque portions of the image.observer - object to be notified as more of
the image is converted.
- Returns:
false if the image pixels are still changing;
true otherwise.- See Also:
Image ,
ImageObserver ,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
|
|
drawImage |
abstract boolean drawImage(Image img,
int x,
int y,
java.awt.image.ImageObserver observer)
Draws as much of the specified image as is currently available.
public abstract boolean drawImage( Image img,
int x,
int y,
java.awt.image.ImageObserver observer)
-
Draws as much of the specified image as is currently available.
The image is drawn with its top-left corner at
( x, y) in this graphics context's coordinate
space. Transparent pixels in the image do not affect whatever
pixels are already there.
This method returns immediately in all cases, even if the
complete image has not yet been loaded, and it has not been dithered
and converted for the current output device.
If the image has completely loaded and its pixels are
no longer being changed, then
drawImage returns true .
Otherwise, drawImage returns false
and as more of
the image becomes available
or it is time to draw another frame of animation,
the process that loads the image notifies
the specified image observer.
- Parameters:
img - the specified image to be drawn. This method does
nothing if img is null.x - the x coordinate.y - the y coordinate.observer - object to be notified as more of
the image is converted.
- Returns:
false if the image pixels are still changing;
true otherwise.- See Also:
Image ,
ImageObserver ,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
|
|
drawImage |
abstract boolean drawImage(Image img,
int x,
int y,
int width,
int height,
Color bgcolor,
java.awt.image.ImageObserver observer)
Draws as much of the specified image as has already been scaled
to fit inside the specified rectangle.
public abstract boolean drawImage( Image img,
int x,
int y,
int width,
int height,
Color bgcolor,
java.awt.image.ImageObserver observer)
-
Draws as much of the specified image as has already been scaled
to fit inside the specified rectangle.
The image is drawn inside the specified rectangle of this
graphics context's coordinate space, and is scaled if
necessary. Transparent pixels are drawn in the specified
background color.
This operation is equivalent to filling a rectangle of the
width and height of the specified image with the given color and then
drawing the image on top of it, but possibly more efficient.
This method returns immediately in all cases, even if the
entire image has not yet been scaled, dithered, and converted
for the current output device.
If the current output representation is not yet complete then
drawImage returns false . As more of
the image becomes available, the process that loads the image notifies
the specified image observer.
A scaled version of an image will not necessarily be
available immediately just because an unscaled version of the
image has been constructed for this output device. Each size of
the image may be cached separately and generated from the original
data in a separate image production sequence.
- Parameters:
img - the specified image to be drawn. This method does
nothing if img is null.x - the x coordinate.y - the y coordinate.width - the width of the rectangle.height - the height of the rectangle.bgcolor - the background color to paint under the
non-opaque portions of the image.observer - object to be notified as more of
the image is converted.
- Returns:
false if the image pixels are still changing;
true otherwise.- See Also:
Image ,
ImageObserver ,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
|
|
drawImage |
abstract boolean drawImage(Image img,
int x,
int y,
int width,
int height,
java.awt.image.ImageObserver observer)
Draws as much of the specified image as has already been scaled
to fit inside the specified rectangle.
public abstract boolean drawImage( Image img,
int x,
int y,
int width,
int height,
java.awt.image.ImageObserver observer)
-
Draws as much of the specified image as has already been scaled
to fit inside the specified rectangle.
The image is drawn inside the specified rectangle of this
graphics context's coordinate space, and is scaled if
necessary. Transparent pixels do not affect whatever pixels
are already there.
This method returns immediately in all cases, even if the
entire image has not yet been scaled, dithered, and converted
for the current output device.
If the current output representation is not yet complete, then
drawImage returns false . As more of
the image becomes available, the process that loads the image notifies
the image observer by calling its imageUpdate method.
A scaled version of an image will not necessarily be
available immediately just because an unscaled version of the
image has been constructed for this output device. Each size of
the image may be cached separately and generated from the original
data in a separate image production sequence.
- Parameters:
img - the specified image to be drawn. This method does
nothing if img is null.x - the x coordinate.y - the y coordinate.width - the width of the rectangle.height - the height of the rectangle.observer - object to be notified as more of
the image is converted.
- Returns:
false if the image pixels are still changing;
true otherwise.- See Also:
Image ,
ImageObserver ,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
|
|
drawImage |
abstract boolean drawImage(Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
Color bgcolor,
java.awt.image.ImageObserver observer)
Draws as much of the specified area of the specified image as is
currently available, scaling it on the fly to fit inside the
specified area of the destination drawable surface.
public abstract boolean drawImage( Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
Color bgcolor,
java.awt.image.ImageObserver observer)
-
Draws as much of the specified area of the specified image as is
currently available, scaling it on the fly to fit inside the
specified area of the destination drawable surface.
Transparent pixels are drawn in the specified background color.
This operation is equivalent to filling a rectangle of the
width and height of the specified image with the given color and then
drawing the image on top of it, but possibly more efficient.
This method returns immediately in all cases, even if the
image area to be drawn has not yet been scaled, dithered, and converted
for the current output device.
If the current output representation is not yet complete then
drawImage returns false . As more of
the image becomes available, the process that loads the image notifies
the specified image observer.
This method always uses the unscaled version of the image
to render the scaled rectangle and performs the required
scaling on the fly. It does not use a cached, scaled version
of the image for this operation. Scaling of the image from source
to destination is performed such that the first coordinate
of the source rectangle is mapped to the first coordinate of
the destination rectangle, and the second source coordinate is
mapped to the second destination coordinate. The subimage is
scaled and flipped as needed to preserve those mappings.
- Parameters:
img - the specified image to be drawn. This method does
nothing if img is null.dx1 - the x coordinate of the first corner of the
destination rectangle.dy1 - the y coordinate of the first corner of the
destination rectangle.dx2 - the x coordinate of the second corner of the
destination rectangle.dy2 - the y coordinate of the second corner of the
destination rectangle.sx1 - the x coordinate of the first corner of the
source rectangle.sy1 - the y coordinate of the first corner of the
source rectangle.sx2 - the x coordinate of the second corner of the
source rectangle.sy2 - the y coordinate of the second corner of the
source rectangle.bgcolor - the background color to paint under the
non-opaque portions of the image.observer - object to be notified as more of the image is
scaled and converted.
- Returns:
false if the image pixels are still changing;
true otherwise.- Since:
- JDK1.1
- See Also:
Image ,
ImageObserver ,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
|
|
drawImage |
abstract boolean drawImage(Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
java.awt.image.ImageObserver observer)
Draws as much of the specified area of the specified image as is
currently available, scaling it on the fly to fit inside the
specified area of the destination drawable surface.
public abstract boolean drawImage( Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
java.awt.image.ImageObserver observer)
-
Draws as much of the specified area of the specified image as is
currently available, scaling it on the fly to fit inside the
specified area of the destination drawable surface. Transparent pixels
do not affect whatever pixels are already there.
This method returns immediately in all cases, even if the
image area to be drawn has not yet been scaled, dithered, and converted
for the current output device.
If the current output representation is not yet complete then
drawImage returns false . As more of
the image becomes available, the process that loads the image notifies
the specified image observer.
This method always uses the unscaled version of the image
to render the scaled rectangle and performs the required
scaling on the fly. It does not use a cached, scaled version
of the image for this operation. Scaling of the image from source
to destination is performed such that the first coordinate
of the source rectangle is mapped to the first coordinate of
the destination rectangle, and the second source coordinate is
mapped to the second destination coordinate. The subimage is
scaled and flipped as needed to preserve those mappings.
- Parameters:
img - the specified image to be drawn. This method does
nothing if img is null.dx1 - the x coordinate of the first corner of the
destination rectangle.dy1 - the y coordinate of the first corner of the
destination rectangle.dx2 - the x coordinate of the second corner of the
destination rectangle.dy2 - the y coordinate of the second corner of the
destination rectangle.sx1 - the x coordinate of the first corner of the
source rectangle.sy1 - the y coordinate of the first corner of the
source rectangle.sx2 - the x coordinate of the second corner of the
source rectangle.sy2 - the y coordinate of the second corner of the
source rectangle.observer - object to be notified as more of the image is
scaled and converted.
- Returns:
false if the image pixels are still changing;
true otherwise.- Since:
- JDK1.1
- See Also:
Image ,
ImageObserver ,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
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|
drawLine |
abstract void drawLine(int x1,
int y1,
int x2,
int y2)
Draws a line, using the current color, between the points
(x1, y1) and (x2, y2)
in this graphics context's coordinate system.
public abstract void drawLine(int x1,
int y1,
int x2,
int y2)
-
Draws a line, using the current color, between the points
(x1, y1) and (x2, y2)
in this graphics context's coordinate system.
- Parameters:
x1 - the first point's x coordinate.y1 - the first point's y coordinate.x2 - the second point's x coordinate.y2 - the second point's y coordinate.
|
|
drawOval |
abstract void drawOval(int x,
int y,
int width,
int height)
Draws the outline of an oval.
public abstract void drawOval(int x,
int y,
int width,
int height)
-
Draws the outline of an oval.
The result is a circle or ellipse that fits within the
rectangle specified by the x , y ,
width , and height arguments.
The oval covers an area that is
width + 1 pixels wide
and height + 1 pixels tall.
- Parameters:
x - the x coordinate of the upper left
corner of the oval to be drawn.y - the y coordinate of the upper left
corner of the oval to be drawn.width - the width of the oval to be drawn.height - the height of the oval to be drawn.- See Also:
fillOval(int, int, int, int)
|
|
drawPolygon |
abstract void drawPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
Draws a closed polygon defined by
arrays of x and y coordinates.
public abstract void drawPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
-
Draws a closed polygon defined by
arrays of x and y coordinates.
Each pair of ( x, y) coordinates defines a point.
This method draws the polygon defined by nPoint line
segments, where the first nPoint - 1
line segments are line segments from
(xPoints[i - 1], yPoints[i - 1])
to (xPoints[i], yPoints[i]) , for
1 ≤ i ≤ nPoints .
The figure is automatically closed by drawing a line connecting
the final point to the first point, if those points are different.
- Parameters:
xPoints - a an array of x coordinates.yPoints - a an array of y coordinates.nPoints - a the total number of points.- See Also:
fillPolygon(int[], int[], int) ,
drawPolyline(int[], int[], int)
|
|
drawPolygon |
void drawPolygon(Polygon p)
Draws the outline of a polygon defined by the specified
Polygon object.
|
|
drawPolyline |
abstract void drawPolyline(int[] xPoints,
int[] yPoints,
int nPoints)
Draws a sequence of connected lines defined by
arrays of x and y coordinates.
public abstract void drawPolyline(int[] xPoints,
int[] yPoints,
int nPoints)
-
Draws a sequence of connected lines defined by
arrays of x and y coordinates.
Each pair of (x, y) coordinates defines a point.
The figure is not closed if the first point
differs from the last point.
- Parameters:
xPoints - an array of x pointsyPoints - an array of y pointsnPoints - the total number of points- Since:
- JDK1.1
- See Also:
drawPolygon(int[], int[], int)
|
|
drawRect |
void drawRect(int x,
int y,
int width,
int height)
Draws the outline of the specified rectangle.
public void drawRect(int x,
int y,
int width,
int height)
-
Draws the outline of the specified rectangle.
The left and right edges of the rectangle are at
x and x + width .
The top and bottom edges are at
y and y + height .
The rectangle is drawn using the graphics context's current color.
- Parameters:
x - the x coordinate
of the rectangle to be drawn.y - the y coordinate
of the rectangle to be drawn.width - the width of the rectangle to be drawn.height - the height of the rectangle to be drawn.- See Also:
fillRect(int, int, int, int) ,
clearRect(int, int, int, int)
|
|
drawRoundRect |
abstract void drawRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
Draws an outlined round-cornered rectangle using this graphics
context's current color.
public abstract void drawRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
-
Draws an outlined round-cornered rectangle using this graphics
context's current color. The left and right edges of the rectangle
are at x and x + width ,
respectively. The top and bottom edges of the rectangle are at
y and y + height .
- Parameters:
x - the x coordinate of the rectangle to be drawn.y - the y coordinate of the rectangle to be drawn.width - the width of the rectangle to be drawn.height - the height of the rectangle to be drawn.arcWidth - the horizontal diameter of the arc
at the four corners.arcHeight - the vertical diameter of the arc
at the four corners.- See Also:
fillRoundRect(int, int, int, int, int, int)
|
|
drawString |
abstract void drawString(java.text.AttributedCharacterIterator iterator,
int x,
int y)
Renders the text of the specified iterator applying its attributes
in accordance with the specification of the
TextAttribute class.
public abstract void drawString(java.text.AttributedCharacterIterator iterator,
int x,
int y)
-
Renders the text of the specified iterator applying its attributes
in accordance with the specification of the
TextAttribute class.
The baseline of the leftmost character is at position
(x, y) in this graphics context's coordinate system.
- Parameters:
iterator - the iterator whose text is to be drawnx - the x coordinate.y - the y coordinate.
- Throws:
java.lang.NullPointerException - if iterator is
null .- See Also:
drawBytes(byte[], int, int, int, int) ,
drawChars(char[], int, int, int, int)
|
|
drawString |
abstract void drawString(java.lang.String str,
int x,
int y)
Draws the text given by the specified string, using this
graphics context's current font and color.
public abstract void drawString(java.lang.String str,
int x,
int y)
-
Draws the text given by the specified string, using this
graphics context's current font and color. The baseline of the
leftmost character is at position (x, y) in this
graphics context's coordinate system.
- Parameters:
str - the string to be drawn.x - the x coordinate.y - the y coordinate.
- Throws:
java.lang.NullPointerException - if str is null .- See Also:
drawBytes(byte[], int, int, int, int) ,
drawChars(char[], int, int, int, int)
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fill3DRect |
void fill3DRect(int x,
int y,
int width,
int height,
boolean raised)
Paints a 3-D highlighted rectangle filled with the current color.
public void fill3DRect(int x,
int y,
int width,
int height,
boolean raised)
-
Paints a 3-D highlighted rectangle filled with the current color.
The edges of the rectangle will be highlighted so that it appears
as if the edges were beveled and lit from the upper left corner.
The colors used for the highlighting effect will be determined from
the current color.
- Parameters:
x - the x coordinate of the rectangle to be filled.y - the y coordinate of the rectangle to be filled.width - the width of the rectangle to be filled.height - the height of the rectangle to be filled.raised - a boolean value that determines whether the
rectangle appears to be raised above the surface
or etched into the surface.- See Also:
draw3DRect(int, int, int, int, boolean)
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fillArc |
abstract void fillArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
Fills a circular or elliptical arc covering the specified rectangle.
public abstract void fillArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
-
Fills a circular or elliptical arc covering the specified rectangle.
The resulting arc begins at startAngle and extends
for arcAngle degrees.
Angles are interpreted such that 0 degrees
is at the 3 o'clock position.
A positive value indicates a counter-clockwise rotation
while a negative value indicates a clockwise rotation.
The center of the arc is the center of the rectangle whose origin
is (x, y) and whose size is specified by the
width and height arguments.
The resulting arc covers an area
width + 1 pixels wide
by height + 1 pixels tall.
The angles are specified relative to the non-square extents of
the bounding rectangle such that 45 degrees always falls on the
line from the center of the ellipse to the upper right corner of
the bounding rectangle. As a result, if the bounding rectangle is
noticeably longer in one axis than the other, the angles to the
start and end of the arc segment will be skewed farther along the
longer axis of the bounds.
- Parameters:
x - the x coordinate of the
upper-left corner of the arc to be filled.y - the y coordinate of the
upper-left corner of the arc to be filled.width - the width of the arc to be filled.height - the height of the arc to be filled.startAngle - the beginning angle.arcAngle - the angular extent of the arc,
relative to the start angle.- See Also:
drawArc(int, int, int, int, int, int)
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fillOval |
abstract void fillOval(int x,
int y,
int width,
int height)
Fills an oval bounded by the specified rectangle with the
current color.
public abstract void fillOval(int x,
int y,
int width,
int height)
-
Fills an oval bounded by the specified rectangle with the
current color.
- Parameters:
x - the x coordinate of the upper left corner
of the oval to be filled.y - the y coordinate of the upper left corner
of the oval to be filled.width - the width of the oval to be filled.height - the height of the oval to be filled.- See Also:
drawOval(int, int, int, int)
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fillPolygon |
abstract void fillPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
Fills a closed polygon defined by
arrays of x and y coordinates.
public abstract void fillPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
-
Fills a closed polygon defined by
arrays of x and y coordinates.
This method draws the polygon defined by nPoint line
segments, where the first nPoint - 1
line segments are line segments from
(xPoints[i - 1], yPoints[i - 1])
to (xPoints[i], yPoints[i]) , for
1 ≤ i ≤ nPoints .
The figure is automatically closed by drawing a line connecting
the final point to the first point, if those points are different.
The area inside the polygon is defined using an
even-odd fill rule, also known as the alternating rule.
- Parameters:
xPoints - a an array of x coordinates.yPoints - a an array of y coordinates.nPoints - a the total number of points.- See Also:
drawPolygon(int[], int[], int)
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fillPolygon |
void fillPolygon(Polygon p)
Fills the polygon defined by the specified Polygon object with
the graphics context's current color.
-
Fills the polygon defined by the specified Polygon object with
the graphics context's current color.
The area inside the polygon is defined using an
even-odd fill rule, also known as the alternating rule.
- Parameters:
p - the polygon to fill.- See Also:
drawPolygon(int[], int[], int)
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fillRect |
abstract void fillRect(int x,
int y,
int width,
int height)
Fills the specified rectangle.
public abstract void fillRect(int x,
int y,
int width,
int height)
-
Fills the specified rectangle.
The left and right edges of the rectangle are at
x and x + width - 1 .
The top and bottom edges are at
y and y + height - 1 .
The resulting rectangle covers an area
width pixels wide by
height pixels tall.
The rectangle is filled using the graphics context's current color.
- Parameters:
x - the x coordinate
of the rectangle to be filled.y - the y coordinate
of the rectangle to be filled.width - the width of the rectangle to be filled.height - the height of the rectangle to be filled.- See Also:
clearRect(int, int, int, int) ,
drawRect(int, int, int, int)
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fillRoundRect |
abstract void fillRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
Fills the specified rounded corner rectangle with the current color.
public abstract void fillRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
-
Fills the specified rounded corner rectangle with the current color.
The left and right edges of the rectangle
are at x and x + width - 1 ,
respectively. The top and bottom edges of the rectangle are at
y and y + height - 1 .
- Parameters:
x - the x coordinate of the rectangle to be filled.y - the y coordinate of the rectangle to be filled.width - the width of the rectangle to be filled.height - the height of the rectangle to be filled.arcWidth - the horizontal diameter
of the arc at the four corners.arcHeight - the vertical diameter
of the arc at the four corners.- See Also:
drawRoundRect(int, int, int, int, int, int)
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finalize |
void finalize()
Disposes of this graphics context once it is no longer referenced.
public void finalize()
-
Disposes of this graphics context once it is no longer referenced.
- Overrides:
finalize in class java.lang.Object
- See Also:
dispose()
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getClip |
Gets the current clipping area.
public abstract Shape getClip()
-
Gets the current clipping area.
This method returns the user clip, which is independent of the
clipping associated with device bounds and window visibility.
If no clip has previously been set, or if the clip has been
cleared using setClip(null) , this method returns
null .
- Returns:
- a
Shape object representing the
current clipping area, or null if
no clip is set. - Since:
- JDK1.1
- See Also:
getClipBounds() ,
clipRect(int, int, int, int) ,
setClip(int, int, int, int) ,
setClip(Shape)
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getClipBounds |
Returns the bounding rectangle of the current clipping area.
-
Returns the bounding rectangle of the current clipping area.
This method refers to the user clip, which is independent of the
clipping associated with device bounds and window visibility.
If no clip has previously been set, or if the clip has been
cleared using setClip(null) , this method returns
null .
The coordinates in the rectangle are relative to the coordinate
system origin of this graphics context.
- Returns:
- the bounding rectangle of the current clipping area,
or
null if no clip is set. - Since:
- JDK1.1
- See Also:
getClip() ,
clipRect(int, int, int, int) ,
setClip(int, int, int, int) ,
setClip(Shape)
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getClipBounds |
Returns the bounding rectangle of the current clipping area.
-
Returns the bounding rectangle of the current clipping area.
The coordinates in the rectangle are relative to the coordinate
system origin of this graphics context. This method differs
from getClipBounds in that an existing
rectangle is used instead of allocating a new one.
This method refers to the user clip, which is independent of the
clipping associated with device bounds and window visibility.
If no clip has previously been set, or if the clip has been
cleared using setClip(null) , this method returns the
specified Rectangle .
- Parameters:
r - the rectangle where the current clipping area is
copied to. Any current values in this rectangle are
overwritten.
- Returns:
- the bounding rectangle of the current clipping area.
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getClipRect |
Deprecated. As of JDK version 1.1,
replaced by getClipBounds() .
Deprecated. As of JDK version 1.1,
replaced by getClipBounds() .
-
Returns the bounding rectangle of the current clipping area.
- Returns:
- the bounding rectangle of the current clipping area
or
null if no clip is set.
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getColor |
abstract Color getColor()
Gets this graphics context's current color.
public abstract Color getColor()
-
Gets this graphics context's current color.
- Returns:
- this graphics context's current color.
- See Also:
Color ,
setColor(Color)
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getFont |
public abstract Font getFont()
-
Gets the current font.
- Returns:
- this graphics context's current font.
- See Also:
Font ,
setFont(Font)
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getFontMetrics |
Gets the font metrics of the current font.
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getFontMetrics |
Gets the font metrics for the specified font.
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hitClip |
boolean hitClip(int x,
int y,
int width,
int height)
Returns true if the specified rectangular area might intersect
the current clipping area.
public boolean hitClip(int x,
int y,
int width,
int height)
-
Returns true if the specified rectangular area might intersect
the current clipping area.
The coordinates of the specified rectangular area are in the
user coordinate space and are relative to the coordinate
system origin of this graphics context.
This method may use an algorithm that calculates a result quickly
but which sometimes might return true even if the specified
rectangular area does not intersect the clipping area.
The specific algorithm employed may thus trade off accuracy for
speed, but it will never return false unless it can guarantee
that the specified rectangular area does not intersect the
current clipping area.
The clipping area used by this method can represent the
intersection of the user clip as specified through the clip
methods of this graphics context as well as the clipping
associated with the device or image bounds and window visibility.
- Parameters:
x - the x coordinate of the rectangle to test against the clipy - the y coordinate of the rectangle to test against the clipwidth - the width of the rectangle to test against the clipheight - the height of the rectangle to test against the clip
- Returns:
true if the specified rectangle intersects
the bounds of the current clip; false
otherwise.
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setClip |
abstract void setClip(int x,
int y,
int width,
int height)
Sets the current clip to the rectangle specified by the given
coordinates.
public abstract void setClip(int x,
int y,
int width,
int height)
-
Sets the current clip to the rectangle specified by the given
coordinates. This method sets the user clip, which is
independent of the clipping associated with device bounds
and window visibility.
Rendering operations have no effect outside of the clipping area.
- Parameters:
x - the x coordinate of the new clip rectangle.y - the y coordinate of the new clip rectangle.width - the width of the new clip rectangle.height - the height of the new clip rectangle.- Since:
- JDK1.1
- See Also:
clipRect(int, int, int, int) ,
setClip(Shape) ,
getClip()
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setClip |
abstract void setClip(Shape clip)
Sets the current clipping area to an arbitrary clip shape.
public abstract void setClip( Shape clip)
-
Sets the current clipping area to an arbitrary clip shape.
Not all objects that implement the Shape
interface can be used to set the clip. The only
Shape objects that are guaranteed to be
supported are Shape objects that are
obtained via the getClip method and via
Rectangle objects. This method sets the
user clip, which is independent of the clipping associated
with device bounds and window visibility.
- Parameters:
clip - the Shape to use to set the clip- Since:
- JDK1.1
- See Also:
getClip() ,
clipRect(int, int, int, int) ,
setClip(int, int, int, int)
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setColor |
abstract void setColor(Color c)
Sets this graphics context's current color to the specified
color.
public abstract void setColor( Color c)
-
Sets this graphics context's current color to the specified
color. All subsequent graphics operations using this graphics
context use this specified color.
- Parameters:
c - the new rendering color.- See Also:
Color ,
getColor()
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setFont |
abstract void setFont(Font font)
Sets this graphics context's font to the specified font.
public abstract void setFont( Font font)
-
Sets this graphics context's font to the specified font.
All subsequent text operations using this graphics context
use this font. A null argument is silently ignored.
- Parameters:
font - the font.- See Also:
getFont() ,
drawString(java.lang.String, int, int) ,
drawBytes(byte[], int, int, int, int) ,
drawChars(char[], int, int, int, int)
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setPaintMode |
abstract void setPaintMode()
Sets the paint mode of this graphics context to overwrite the
destination with this graphics context's current color.
public abstract void setPaintMode()
-
Sets the paint mode of this graphics context to overwrite the
destination with this graphics context's current color.
This sets the logical pixel operation function to the paint or
overwrite mode. All subsequent rendering operations will
overwrite the destination with the current color.
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setXORMode |
abstract void setXORMode(Color c1)
Sets the paint mode of this graphics context to alternate between
this graphics context's current color and the new specified color.
public abstract void setXORMode( Color c1)
-
Sets the paint mode of this graphics context to alternate between
this graphics context's current color and the new specified color.
This specifies that logical pixel operations are performed in the
XOR mode, which alternates pixels between the current color and
a specified XOR color.
When drawing operations are performed, pixels which are the
current color are changed to the specified color, and vice versa.
Pixels that are of colors other than those two colors are changed
in an unpredictable but reversible manner; if the same figure is
drawn twice, then all pixels are restored to their original values.
- Parameters:
c1 - the XOR alternation color
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toString |
java.lang.String toString()
Returns a String object representing this
Graphics object's value.
public java.lang.String toString()
-
Returns a String object representing this
Graphics object's value.
- Overrides:
toString in class java.lang.Object
- Returns:
- a string representation of this graphics context.
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translate |
abstract void translate(int x,
int y)
Translates the origin of the graphics context to the point
(x, y) in the current coordinate system.
public abstract void translate(int x,
int y)
-
Translates the origin of the graphics context to the point
(x, y) in the current coordinate system.
Modifies this graphics context so that its new origin corresponds
to the point (x, y) in this graphics context's
original coordinate system. All coordinates used in subsequent
rendering operations on this graphics context will be relative
to this new origin.
- Parameters:
x - the x coordinate.y - the y coordinate.
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