| java.awt.Graphics2D
 org.apache.xmlgraphics.java2d.AbstractGraphics2D
All known Subclasses: org.apache.xmlgraphics.java2d.DefaultGraphics2D, org.apache.xmlgraphics.java2d.ps.PSGraphics2D,
| AbstractGraphics2D | | abstract public class AbstractGraphics2D extends Graphics2D implements Cloneable(Code) | | This extension of the java.awt.Graphics2D abstract class
is still abstract, but it implements a lot of the Graphics2D
method in a way that concrete implementations can reuse.
This class uses a GraphicContext to store the state of
its various attributes that control the rendering, such as the
current Font, Paint or clip.
Concrete implementations can focus on implementing the rendering
methods, such as drawShape. As a convenience, rendering
methods that can be expressed with other rendering methods (e.g.,
drawRect can be expressed as draw(new Rectangle(..))),
are implemented by AbstractGraphics2D
author:
Vincent Hardy
version:
$Id: AbstractGraphics2D.java 496556 2007-01-16 00:59:48Z cam $
See Also: org.apache.xmlgraphics.java2d.GraphicContext |
| Method Summary | |
| public void | addRenderingHints(Map hints)
Sets the values of an arbitrary number of preferences for the
rendering algorithms. | | public 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 void | clip(Shape s)
Intersects the current Clip with the interior of the
specified Shape and sets the Clip to the
resulting intersection. | | public 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. | | public 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. | | public void | drawGlyphVector(GlyphVector g, float x, float y)
Renders the text of the specified
GlyphVector using
the Graphics2D context's rendering attributes.
The rendering attributes applied include the Clip,
Transform, Paint, and
Composite attributes. | | public boolean | drawImage(Image img, int x, int y, Color bgcolor, 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. | | public boolean | drawImage(Image img, int x, int y, int width, int height, Color bgcolor, 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. | | public boolean | drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, 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 boolean | drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, 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. | | public boolean | drawImage(Image img, AffineTransform xform, ImageObserver obs)
Renders an image, applying a transform from image space into user space
before drawing. | | public void | drawImage(BufferedImage img, BufferedImageOp op, int x, int y)
Renders a BufferedImage that is
filtered with a
BufferedImageOp .
The rendering attributes applied include the Clip,
Transform
and Composite attributes. | | public 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 void | drawOval(int x, int y, int width, int height)
Draws the outline of an oval. | | public void | drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
Draws a closed polygon defined by
arrays of x and y coordinates. | | public void | drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
Draws a sequence of connected lines defined by
arrays of x and y coordinates. | | public void | drawRect(int x, int y, int width, int height)
| | public 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 void | drawString(String str, int x, int y)
Draws the text given by the specified string, using this
graphics context's current font and color. | | public void | drawString(AttributedCharacterIterator iterator, float x, float y)
Generic implementation for drawing attributed strings using TextLayout. | | public void | drawString(AttributedCharacterIterator iterator, int x, int y)
Draws the text given by the specified iterator, using this
graphics context's current color. | | public 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. | | public void | fillOval(int x, int y, int width, int height)
Fills an oval bounded by the specified rectangle with the
current color. | | public void | fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
Fills a closed polygon defined by
arrays of x and y coordinates. | | public void | fillRect(int x, int y, int width, int height)
Fills the specified rectangle. | | public 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. | | public Color | getBackground()
Returns the background color used for clearing a region. | | public Shape | getClip()
Gets the current clipping area. | | public Rectangle | getClipBounds()
Returns the bounding rectangle of the current clipping area. | | public Color | getColor()
Gets this graphics context's current color. | | public Composite | getComposite()
Returns the current Composite in the
Graphics2D context. | | public Font | getFont()
Gets the current font. | | public FontRenderContext | getFontRenderContext()
Get the rendering context of the Font within this
Graphics2D context.
The
FontRenderContext encapsulates application hints such as anti-aliasing and
fractional metrics, as well as target device specific information
such as dots-per-inch. | | public GraphicContext | getGraphicContext()
| | public Paint | getPaint()
Returns the current Paint of the
Graphics2D context. | | public Object | getRenderingHint(RenderingHints.Key hintKey)
Returns the value of a single preference for the rendering algorithms.
Hint categories include controls for rendering quality and overall
time/quality trade-off in the rendering process. | | public RenderingHints | getRenderingHints()
Gets the preferences for the rendering algorithms. | | public Stroke | getStroke()
Returns the current Stroke in the
Graphics2D context. | | public AffineTransform | getTransform()
Returns a copy of the current Transform in the
Graphics2D context. | | public boolean | hit(Rectangle rect, Shape s, boolean onStroke)
Checks whether or not the specified Shape intersects
the specified
Rectangle , which is in device
space. | | public void | rotate(double theta)
Concatenates the current Graphics2D
Transform with a rotation transform. | | public void | rotate(double theta, double x, double y)
Concatenates the current Graphics2D
Transform with a translated rotation
transform. | | public void | scale(double sx, double sy)
Concatenates the current Graphics2D
Transform with a scaling transformation
Subsequent rendering is resized according to the specified scaling
factors relative to the previous scaling. | | public void | setBackground(Color color)
Sets the background color for the Graphics2D context.
The background color is used for clearing a region.
When a Graphics2D is constructed for a
Component, the background color is
inherited from the Component. | | public void | setClip(int x, int y, int width, int height)
Sets the current clip to the rectangle specified by the given
coordinates. | | public 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. | | public void | setColor(Color c)
Sets this graphics context's current color to the specified
color. | | public void | setComposite(Composite comp)
Sets the Composite for the Graphics2D context.
The Composite is used in all drawing methods such as
drawImage, drawString, draw,
and fill. | | public void | setFont(Font font)
Sets this graphics context's font to the specified font. | | public void | setPaint(Paint paint)
Sets the Paint attribute for the
Graphics2D context. | | public 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. | | public void | setRenderingHint(RenderingHints.Key hintKey, Object hintValue)
Sets the value of a single preference for the rendering algorithms.
Hint categories include controls for rendering quality and overall
time/quality trade-off in the rendering process. | | public void | setRenderingHints(Map hints)
Replaces the values of all preferences for the rendering
algorithms with the specified hints. | | public void | setStroke(Stroke s)
Sets the Stroke for the Graphics2D context. | | public void | setTransform(AffineTransform Tx)
Sets the Transform in the Graphics2D
context. | | public void | shear(double shx, double shy)
Concatenates the current Graphics2D
Transform with a shearing transform. | | public void | transform(AffineTransform Tx)
Composes an AffineTransform object with the
Transform in this Graphics2D according
to the rule last-specified-first-applied. | | public 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. | | public void | translate(double tx, double ty)
Concatenates the current
Graphics2D Transform
with a translation transform. |
| gc | | protected GraphicContext gc(Code) | | Current state of the Graphic Context. The GraphicsContext
class manages the state of this Graphics2D graphic context
attributes.
|
| inPossibleRecursion | | protected boolean inPossibleRecursion(Code) | | Protection agains infinite recursion
|
| textAsShapes | | protected boolean textAsShapes(Code) | | Text handling strategy.
|
| AbstractGraphics2D | | public AbstractGraphics2D(boolean textAsShapes)(Code) | |
Parameters:
textAsShapes - if true, all text is turned into shapes in theconvertion. No text is output. |
| AbstractGraphics2D | | public AbstractGraphics2D(AbstractGraphics2D g)(Code) | | Creates a new AbstractGraphics2D from an existing instance.
Parameters:
g - the AbstractGraphics2D whose properties should be copied |
| addRenderingHints | | public void addRenderingHints(Map hints)(Code) | | Sets the values of an arbitrary number of preferences for the
rendering algorithms.
Only values for the rendering hints that are present in the
specified Map object are modified.
All other preferences not present in the specified
object are left unmodified.
Hint categories include controls for rendering quality and
overall time/quality trade-off in the rendering process.
Refer to the RenderingHints class for definitions of
some common keys and values.
Parameters:
hints - the rendering hints to be set
See Also: RenderingHints |
| clip | | public void clip(Shape s)(Code) | | Intersects the current Clip with the interior of the
specified Shape and sets the Clip to the
resulting intersection. The specified Shape is
transformed with the current Graphics2D
Transform before being intersected with the current
Clip. This method is used to make the current
Clip smaller.
To make the Clip larger, use setClip.
The user clip modified by this method is independent of the
clipping associated with device bounds and visibility. If no clip has
previously been set, or if the clip has been cleared using
java.awt.Graphics.setClip(Shape) setClip with a
null argument, the specified Shape becomes
the new user clip.
Parameters:
s - the Shape to be intersected with the currentClip. If s is null,this method clears the current Clip. |
| clipRect | | public void clipRect(int x, int y, int width, int height)(Code) | | 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 with
Parameters:
y - the y coordinate of the rectangle to intersect the clip with
Parameters:
width - the width of the rectangle to intersect the clip with
Parameters:
height - the height of the rectangle to intersect the clip with
See Also: AbstractGraphics2D.setClip(int,int,int,int)
See Also: AbstractGraphics2D.setClip(Shape) |
| drawArc | | public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle)(Code) | | 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 theupper-left corner of the arc to be drawn.
Parameters:
y - the y coordinate of theupper-left corner of the arc to be drawn.
Parameters:
width - the width of the arc to be drawn.
Parameters:
height - the height of the arc to be drawn.
Parameters:
startAngle - the beginning angle.
Parameters:
arcAngle - the angular extent of the arc,relative to the start angle.
See Also: java.awt.Graphics.fillArc |
| drawImage | | public boolean drawImage(Image img, int x, int y, Color bgcolor, ImageObserver observer)(Code) | | 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 not yet been completely loaded, then
drawImage returns false. As more of
the image becomes available, the process that draws the image notifies
the specified image observer.
Parameters:
img - the specified image to be drawn.
Parameters:
x - the x coordinate.
Parameters:
y - the y coordinate.
Parameters:
bgcolor - the background color to paint under thenon-opaque portions of the image.
Parameters:
observer - object to be notified as more ofthe image is converted.
See Also: java.awt.Image
See Also: java.awt.image.ImageObserver
See Also: java.awt.image.ImageObserver.imageUpdate(java.awt.Imageintintintintint) |
| drawImage | | public boolean drawImage(Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer)(Code) | | 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 draws 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.
Parameters:
x - the x coordinate.
Parameters:
y - the y coordinate.
Parameters:
width - the width of the rectangle.
Parameters:
height - the height of the rectangle.
Parameters:
bgcolor - the background color to paint under thenon-opaque portions of the image.
Parameters:
observer - object to be notified as more ofthe image is converted.
See Also: java.awt.Image
See Also: java.awt.image.ImageObserver
See Also: java.awt.image.ImageObserver.imageUpdate(java.awt.Imageintintintintint) |
| drawImage | | public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer)(Code) | | 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 draws 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
Parameters:
dx1 - the x coordinate of the first corner of thedestination rectangle.
Parameters:
dy1 - the y coordinate of the first corner of thedestination rectangle.
Parameters:
dx2 - the x coordinate of the second corner of thedestination rectangle.
Parameters:
dy2 - the y coordinate of the second corner of thedestination rectangle.
Parameters:
sx1 - the x coordinate of the first corner of thesource rectangle.
Parameters:
sy1 - the y coordinate of the first corner of thesource rectangle.
Parameters:
sx2 - the x coordinate of the second corner of thesource rectangle.
Parameters:
sy2 - the y coordinate of the second corner of thesource rectangle.
Parameters:
observer - object to be notified as more of the image isscaled and converted.
See Also: java.awt.Image
See Also: java.awt.image.ImageObserver
See Also: java.awt.image.ImageObserver.imageUpdate(java.awt.Imageintintintintint)
since:
JDK1.1 |
| drawImage | | public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver observer)(Code) | | 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 draws 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
Parameters:
dx1 - the x coordinate of the first corner of thedestination rectangle.
Parameters:
dy1 - the y coordinate of the first corner of thedestination rectangle.
Parameters:
dx2 - the x coordinate of the second corner of thedestination rectangle.
Parameters:
dy2 - the y coordinate of the second corner of thedestination rectangle.
Parameters:
sx1 - the x coordinate of the first corner of thesource rectangle.
Parameters:
sy1 - the y coordinate of the first corner of thesource rectangle.
Parameters:
sx2 - the x coordinate of the second corner of thesource rectangle.
Parameters:
sy2 - the y coordinate of the second corner of thesource rectangle.
Parameters:
bgcolor - the background color to paint under thenon-opaque portions of the image.
Parameters:
observer - object to be notified as more of the image isscaled and converted.
See Also: java.awt.Image
See Also: java.awt.image.ImageObserver
See Also: java.awt.image.ImageObserver.imageUpdate(java.awt.Imageintintintintint)
since:
JDK1.1 |
| drawImage | | public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs)(Code) | | Renders an image, applying a transform from image space into user space
before drawing.
The transformation from user space into device space is done with
the current Transform in the Graphics2D.
The specified transformation is applied to the image before the
transform attribute in the Graphics2D context is applied.
The rendering attributes applied include the Clip,
Transform, and Composite attributes.
Note that no rendering is done if the specified transform is
noninvertible.
Parameters:
img - the Image to be rendered
Parameters:
xform - the transformation from image space into user space
Parameters:
obs - the ImageObserverto be notified as more of the Imageis converted true if the Image isfully loaded and completely rendered;false if the Image is still being loaded.
See Also: AbstractGraphics2D.transform
See Also: AbstractGraphics2D.setTransform
See Also: AbstractGraphics2D.setComposite
See Also: AbstractGraphics2D.clip
See Also: AbstractGraphics2D.setClip(Shape) |
| drawImage | | public void drawImage(BufferedImage img, BufferedImageOp op, int x, int y)(Code) | | Renders a BufferedImage that is
filtered with a
BufferedImageOp .
The rendering attributes applied include the Clip,
Transform
and Composite attributes. This is equivalent to:
img1 = op.filter(img, null);
drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null);
Parameters:
img - the BufferedImage to be rendered
Parameters:
op - the filter to be applied to the image before rendering
Parameters:
x - the x coordinate in user space where the image is rendered
Parameters:
y - the y coordinate in user space where the image is rendered
See Also: AbstractGraphics2D.transform
See Also: AbstractGraphics2D.setTransform
See Also: AbstractGraphics2D.setComposite
See Also: AbstractGraphics2D.clip
See Also: AbstractGraphics2D.setClip(Shape) |
| drawLine | | public void drawLine(int x1, int y1, int x2, int y2)(Code) | | 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.
Parameters:
y1 - the first point's y coordinate.
Parameters:
x2 - the second point's x coordinate.
Parameters:
y2 - the second point's y coordinate. |
| drawOval | | public void drawOval(int x, int y, int width, int height)(Code) | | 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 leftcorner of the oval to be drawn.
Parameters:
y - the y coordinate of the upper leftcorner of the oval to be drawn.
Parameters:
width - the width of the oval to be drawn.
Parameters:
height - the height of the oval to be drawn.
See Also: java.awt.Graphics.fillOval |
| drawPolygon | | public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)(Code) | | 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.
Parameters:
yPoints - a an array of y coordinates.
Parameters:
nPoints - a the total number of points.
See Also: java.awt.Graphics.fillPolygon(int[]int[]int)
See Also: java.awt.Graphics.drawPolyline |
| drawPolyline | | public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)(Code) | | 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 points
Parameters:
yPoints - an array of y points
Parameters:
nPoints - the total number of points
See Also: java.awt.Graphics.drawPolygon(int[]int[]int)
since:
JDK1.1 |
| drawRect | | public void drawRect(int x, int y, int width, int height)(Code) | | |
| drawRoundRect | | public void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)(Code) | | 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.
Parameters:
y - the y coordinate of the rectangle to be drawn.
Parameters:
width - the width of the rectangle to be drawn.
Parameters:
height - the height of the rectangle to be drawn.
Parameters:
arcWidth - the horizontal diameter of the arcat the four corners.
Parameters:
arcHeight - the vertical diameter of the arcat the four corners.
See Also: java.awt.Graphics.fillRoundRect |
| drawString | | public void drawString(String str, int x, int y)(Code) | | Draws the text given by the specified string, 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:
str - the string to be drawn.
Parameters:
x - the x coordinate.
Parameters:
y - the y coordinate.
See Also: java.awt.Graphics.drawBytes
See Also: java.awt.Graphics.drawChars |
| drawString | | public void drawString(AttributedCharacterIterator iterator, int x, int y)(Code) | | Draws the text given by the specified iterator, using this
graphics context's current color. The iterator has to specify a font
for each character. The baseline of the
first character is at position (x, y) in this
graphics context's coordinate system.
Parameters:
iterator - the iterator whose text is to be drawn
Parameters:
x - the x coordinate.
Parameters:
y - the y coordinate.
See Also: java.awt.Graphics.drawBytes
See Also: java.awt.Graphics.drawChars |
| fillArc | | public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle)(Code) | | 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 theupper-left corner of the arc to be filled.
Parameters:
y - the y coordinate of theupper-left corner of the arc to be filled.
Parameters:
width - the width of the arc to be filled.
Parameters:
height - the height of the arc to be filled.
Parameters:
startAngle - the beginning angle.
Parameters:
arcAngle - the angular extent of the arc,relative to the start angle.
See Also: java.awt.Graphics.drawArc |
| fillOval | | public void fillOval(int x, int y, int width, int height)(Code) | | Fills an oval bounded by the specified rectangle with the
current color.
Parameters:
x - the x coordinate of the upper left cornerof the oval to be filled.
Parameters:
y - the y coordinate of the upper left cornerof the oval to be filled.
Parameters:
width - the width of the oval to be filled.
Parameters:
height - the height of the oval to be filled.
See Also: java.awt.Graphics.drawOval |
| fillPolygon | | public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)(Code) | | 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.
Parameters:
yPoints - a an array of y coordinates.
Parameters:
nPoints - a the total number of points.
See Also: java.awt.Graphics.drawPolygon(int[]int[]int) |
| fillRect | | public void fillRect(int x, int y, int width, int height)(Code) | | 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 coordinateof the rectangle to be filled.
Parameters:
y - the y coordinateof the rectangle to be filled.
Parameters:
width - the width of the rectangle to be filled.
Parameters:
height - the height of the rectangle to be filled.
See Also: java.awt.Graphics.clearRect
See Also: java.awt.Graphics.drawRect |
| fillRoundRect | | public void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)(Code) | | 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.
Parameters:
y - the y coordinate of the rectangle to be filled.
Parameters:
width - the width of the rectangle to be filled.
Parameters:
height - the height of the rectangle to be filled.
Parameters:
arcWidth - the horizontal diameterof the arc at the four corners.
Parameters:
arcHeight - the vertical diameterof the arc at the four corners.
See Also: java.awt.Graphics.drawRoundRect |
| getClipBounds | | public Rectangle getClipBounds()(Code) | | 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.
the bounding rectangle of the current clipping area,or null if no clip is set.
See Also: java.awt.Graphics.getClip
See Also: java.awt.Graphics.clipRect
See Also: java.awt.Graphics.setClip(intintintint)
See Also: java.awt.Graphics.setClip(Shape)
since:
JDK1.1 |
| getFontRenderContext | | public FontRenderContext getFontRenderContext()(Code) | | Get the rendering context of the Font within this
Graphics2D context.
The
FontRenderContext encapsulates application hints such as anti-aliasing and
fractional metrics, as well as target device specific information
such as dots-per-inch. This information should be provided by the
application when using objects that perform typographical
formatting, such as Font and
TextLayout. This information should also be provided
by applications that perform their own layout and need accurate
measurements of various characteristics of glyphs such as advance
and line height when various rendering hints have been applied to
the text rendering.
a reference to an instance of FontRenderContext.
See Also: java.awt.font.FontRenderContext
See Also: java.awt.Font.createGlyphVector(FontRenderContextchar[])
See Also: java.awt.font.TextLayout
since:
JDK1.2 |
| getRenderingHint | | public Object getRenderingHint(RenderingHints.Key hintKey)(Code) | | Returns the value of a single preference for the rendering algorithms.
Hint categories include controls for rendering quality and overall
time/quality trade-off in the rendering process. Refer to the
RenderingHints class for definitions of some common
keys and values.
Parameters:
hintKey - the key corresponding to the hint to get. an object representing the value for the specified hint key.Some of the keys and their associated values are defined in theRenderingHints class.
See Also: RenderingHints |
| getRenderingHints | | public RenderingHints getRenderingHints()(Code) | | Gets the preferences for the rendering algorithms. Hint categories
include controls for rendering quality and overall time/quality
trade-off in the rendering process.
Returns all of the hint key/value pairs that were ever specified in
one operation. Refer to the
RenderingHints class for definitions of some common
keys and values.
a reference to an instance of RenderingHintsthat contains the current preferences.
See Also: RenderingHints |
| rotate | | public void rotate(double theta)(Code) | | Concatenates the current Graphics2D
Transform with a rotation transform.
Subsequent rendering is rotated by the specified radians relative
to the previous origin.
This is equivalent to calling transform(R), where R is an
AffineTransform represented by the following matrix:
[ cos(theta) -sin(theta) 0 ]
[ sin(theta) cos(theta) 0 ]
[ 0 0 1 ]
Rotating with a positive angle theta rotates points on the positive
x axis toward the positive y axis.
Parameters:
theta - the angle of rotation in radians |
| rotate | | public void rotate(double theta, double x, double y)(Code) | | Concatenates the current Graphics2D
Transform with a translated rotation
transform. Subsequent rendering is transformed by a transform
which is constructed by translating to the specified location,
rotating by the specified radians, and translating back by the same
amount as the original translation. This is equivalent to the
following sequence of calls:
translate(x, y);
rotate(theta);
translate(-x, -y);
Rotating with a positive angle theta rotates points on the positive
x axis toward the positive y axis.
Parameters:
theta - the angle of rotation in radians
Parameters:
x - the x coordinate of the origin of the rotation
Parameters:
y - the y coordinate of the origin of the rotation |
| scale | | public void scale(double sx, double sy)(Code) | | Concatenates the current Graphics2D
Transform with a scaling transformation
Subsequent rendering is resized according to the specified scaling
factors relative to the previous scaling.
This is equivalent to calling transform(S), where S is an
AffineTransform represented by the following matrix:
[ sx 0 0 ]
[ 0 sy 0 ]
[ 0 0 1 ]
Parameters:
sx - the amount by which X coordinates in subsequentrendering operations are multiplied relative to previousrendering operations.
Parameters:
sy - the amount by which Y coordinates in subsequentrendering operations are multiplied relative to previousrendering operations. |
| setBackground | | public void setBackground(Color color)(Code) | | Sets the background color for the Graphics2D context.
The background color is used for clearing a region.
When a Graphics2D is constructed for a
Component, the background color is
inherited from the Component. Setting the background color
in the Graphics2D context only affects the subsequent
clearRect calls and not the background color of the
Component. To change the background
of the Component, use appropriate methods of
the Component.
Parameters:
color - the background color that isused insubsequent calls to clearRect
See Also: AbstractGraphics2D.getBackground
See Also: java.awt.Graphics.clearRect |
| setClip | | public void setClip(int x, int y, int width, int height)(Code) | | 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.
Parameters:
y - the y coordinate of the new clip rectangle.
Parameters:
width - the width of the new clip rectangle.
Parameters:
height - the height of the new clip rectangle.
See Also: java.awt.Graphics.clipRect
See Also: java.awt.Graphics.setClip(Shape)
since:
JDK1.1 |
| setClip | | public void setClip(Shape clip)(Code) | | 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
See Also: java.awt.Graphics.getClip
See Also: java.awt.Graphics.clipRect
See Also: java.awt.Graphics.setClip(intintintint)
since:
JDK1.1 |
| setColor | | public void setColor(Color c)(Code) | | 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: java.awt.Color
See Also: java.awt.Graphics.getColor |
| setComposite | | public void setComposite(Composite comp)(Code) | | Sets the Composite for the Graphics2D context.
The Composite is used in all drawing methods such as
drawImage, drawString, draw,
and fill. It specifies how new pixels are to be combined
with the existing pixels on the graphics device during the rendering
process.
If this Graphics2D context is drawing to a
Component on the display screen and the
Composite is a custom object rather than an
instance of the AlphaComposite class, and if
there is a security manager, its checkPermission
method is called with an AWTPermission("readDisplayPixels")
permission.
Parameters:
comp - the Composite object to be used for rendering
throws:
SecurityException - if a custom Composite object is beingused to render to the screen and a security manageris set and its checkPermission methoddoes not allow the operation.
See Also: java.awt.Graphics.setXORMode
See Also: java.awt.Graphics.setPaintMode
See Also: java.awt.AlphaComposite |
| setFont | | public void setFont(Font font)(Code) | | Sets this graphics context's font to the specified font.
All subsequent text operations using this graphics context
use this font.
Parameters:
font - the font.
See Also: java.awt.Graphics.getFont |
| setPaint | | public void setPaint(Paint paint)(Code) | | Sets the Paint attribute for the
Graphics2D context. Calling this method
with a null Paint object does
not have any effect on the current Paint attribute
of this Graphics2D.
Parameters:
paint - the Paint object to be used to generatecolor during the rendering process, or null
See Also: java.awt.Graphics.setColor |
| setPaintMode | | public void setPaintMode()(Code) | | 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.
|
| setRenderingHint | | public void setRenderingHint(RenderingHints.Key hintKey, Object hintValue)(Code) | | Sets the value of a single preference for the rendering algorithms.
Hint categories include controls for rendering quality and overall
time/quality trade-off in the rendering process. Refer to the
RenderingHints class for definitions of some common
keys and values.
Parameters:
hintKey - the key of the hint to be set.
Parameters:
hintValue - the value indicating preferences for the specifiedhint category.
See Also: RenderingHints |
| setRenderingHints | | public void setRenderingHints(Map hints)(Code) | | Replaces the values of all preferences for the rendering
algorithms with the specified hints.
The existing values for all rendering hints are discarded and
the new set of known hints and values are initialized from the
specified
Map object.
Hint categories include controls for rendering quality and
overall time/quality trade-off in the rendering process.
Refer to the RenderingHints class for definitions of
some common keys and values.
Parameters:
hints - the rendering hints to be set
See Also: RenderingHints |
| setStroke | | public void setStroke(Stroke s)(Code) | | Sets the Stroke for the Graphics2D context.
Parameters:
s - the Stroke object to be used to stroke aShape during the rendering process |
| shear | | public void shear(double shx, double shy)(Code) | | Concatenates the current Graphics2D
Transform with a shearing transform.
Subsequent renderings are sheared by the specified
multiplier relative to the previous position.
This is equivalent to calling transform(SH), where SH
is an AffineTransform represented by the following
matrix:
[ 1 shx 0 ]
[ shy 1 0 ]
[ 0 0 1 ]
Parameters:
shx - the multiplier by which coordinates are shifted inthe positive X axis direction as a function of their Y coordinate
Parameters:
shy - the multiplier by which coordinates are shifted inthe positive Y axis direction as a function of their X coordinate |
| transform | | public void transform(AffineTransform Tx)(Code) | | Composes an AffineTransform object with the
Transform in this Graphics2D according
to the rule last-specified-first-applied. If the current
Transform is Cx, the result of composition
with Tx is a new Transform Cx'. Cx' becomes the
current Transform for this Graphics2D.
Transforming a point p by the updated Transform Cx' is
equivalent to first transforming p by Tx and then transforming
the result by the original Transform Cx. In other
words, Cx'(p) = Cx(Tx(p)). A copy of the Tx is made, if necessary,
so further modifications to Tx do not affect rendering.
Parameters:
Tx - the AffineTransform object to be composed withthe current Transform
See Also: AbstractGraphics2D.setTransform
See Also: AffineTransform |
| translate | | public void translate(int x, int y)(Code) | | 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.
Parameters:
y - the y coordinate. |
| translate | | public void translate(double tx, double ty)(Code) | | Concatenates the current
Graphics2D Transform
with a translation transform.
Subsequent rendering is translated by the specified
distance relative to the previous position.
This is equivalent to calling transform(T), where T is an
AffineTransform represented by the following matrix:
[ 1 0 tx ]
[ 0 1 ty ]
[ 0 0 1 ]
Parameters:
tx - the distance to translate along the x-axis
Parameters:
ty - the distance to translate along the y-axis |
| Methods inherited from java.awt.Graphics2D | abstract public void addRenderingHints(Map hints)(Code)(Java Doc)
abstract public void clip(Shape s)(Code)(Java Doc)
abstract public void draw(Shape s)(Code)(Java Doc)
public void draw3DRect(int x, int y, int width, int height, boolean raised)(Code)(Java Doc)
abstract public void drawGlyphVector(GlyphVector g, float x, float y)(Code)(Java Doc)
abstract public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs)(Code)(Java Doc)
abstract public void drawImage(BufferedImage img, BufferedImageOp op, int x, int y)(Code)(Java Doc)
abstract public void drawRenderableImage(RenderableImage img, AffineTransform xform)(Code)(Java Doc)
abstract public void drawRenderedImage(RenderedImage img, AffineTransform xform)(Code)(Java Doc)
abstract public void drawString(String str, int x, int y)(Code)(Java Doc)
abstract public void drawString(String str, float x, float y)(Code)(Java Doc)
abstract public void drawString(AttributedCharacterIterator iterator, int x, int y)(Code)(Java Doc)
abstract public void drawString(AttributedCharacterIterator iterator, float x, float y)(Code)(Java Doc)
abstract public void fill(Shape s)(Code)(Java Doc)
public void fill3DRect(int x, int y, int width, int height, boolean raised)(Code)(Java Doc)
abstract public Color getBackground()(Code)(Java Doc)
abstract public Composite getComposite()(Code)(Java Doc)
abstract public GraphicsConfiguration getDeviceConfiguration()(Code)(Java Doc)
abstract public FontRenderContext getFontRenderContext()(Code)(Java Doc)
abstract public Paint getPaint()(Code)(Java Doc)
abstract public Object getRenderingHint(Key hintKey)(Code)(Java Doc)
abstract public RenderingHints getRenderingHints()(Code)(Java Doc)
abstract public Stroke getStroke()(Code)(Java Doc)
abstract public AffineTransform getTransform()(Code)(Java Doc)
abstract public boolean hit(Rectangle rect, Shape s, boolean onStroke)(Code)(Java Doc)
abstract public void rotate(double theta)(Code)(Java Doc)
abstract public void rotate(double theta, double x, double y)(Code)(Java Doc)
abstract public void scale(double sx, double sy)(Code)(Java Doc)
abstract public void setBackground(Color color)(Code)(Java Doc)
abstract public void setComposite(Composite comp)(Code)(Java Doc)
abstract public void setPaint(Paint paint)(Code)(Java Doc)
abstract public void setRenderingHint(Key hintKey, Object hintValue)(Code)(Java Doc)
abstract public void setRenderingHints(Map hints)(Code)(Java Doc)
abstract public void setStroke(Stroke s)(Code)(Java Doc)
abstract public void setTransform(AffineTransform Tx)(Code)(Java Doc)
abstract public void shear(double shx, double shy)(Code)(Java Doc)
abstract public void transform(AffineTransform Tx)(Code)(Java Doc)
abstract public void translate(int x, int y)(Code)(Java Doc)
abstract public void translate(double tx, double ty)(Code)(Java Doc)
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