public class DefaultGraphics2D extends AbstractGraphics2D
AbstractGraphics2D
is a
simple help to programmers to get started with their own
implementation of Graphics2D
.
DefaultGraphics2D
implements all the abstract methods
is AbstractGraphics2D
and makes it easy to start
implementing a Graphic2D
piece-meal.AbstractGraphics2D
gc, textAsShapes
Constructor and Description |
---|
DefaultGraphics2D(boolean textAsShapes)
Default constructor
|
DefaultGraphics2D(DefaultGraphics2D g)
This constructor supports the create method
|
Modifier and Type | Method and Description |
---|---|
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 . |
java.awt.Graphics |
create()
Creates a new
Graphics object that is
a copy of this Graphics object. |
void |
dispose()
Disposes of this graphics context and releases
any system resources that it is using.
|
void |
draw(java.awt.Shape s)
Strokes the outline of a
Shape using the settings of the
current Graphics2D context. |
boolean |
drawImage(java.awt.Image img,
int x,
int y,
java.awt.image.ImageObserver observer)
Draws as much of the specified image as is currently available.
|
boolean |
drawImage(java.awt.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.
|
void |
drawRenderableImage(java.awt.image.renderable.RenderableImage img,
java.awt.geom.AffineTransform xform)
Renders a
RenderableImage ,
applying a transform from image space into user space before drawing. |
void |
drawRenderedImage(java.awt.image.RenderedImage img,
java.awt.geom.AffineTransform xform)
Renders a
RenderedImage ,
applying a transform from image
space into user space before drawing. |
void |
drawString(java.text.AttributedCharacterIterator iterator,
float x,
float y)
Renders the text of the specified iterator, using the
Graphics2D context's current Paint . |
void |
drawString(java.lang.String s,
float x,
float y)
Renders the text specified by the specified
String ,
using the current Font and Paint attributes
in the Graphics2D context. |
void |
fill(java.awt.Shape s)
Fills the interior of a
Shape using the settings of the
Graphics2D context. |
java.awt.GraphicsConfiguration |
getDeviceConfiguration()
Returns the device configuration associated with this
Graphics2D . |
java.awt.FontMetrics |
getFontMetrics(java.awt.Font f)
Gets the font metrics for the specified font.
|
void |
setXORMode(java.awt.Color c1)
Sets the paint mode of this graphics context to alternate between
this graphics context's current color and the new specified color.
|
addRenderingHints, clearRect, clip, clipRect, drawArc, drawGlyphVector, drawImage, drawImage, drawImage, drawImage, drawImage, drawImage, drawLine, drawOval, drawPolygon, drawPolyline, drawRect, drawRoundRect, drawString, drawString, fillArc, fillOval, fillPolygon, fillRect, fillRoundRect, getBackground, getClip, getClipBounds, getColor, getComposite, getFont, getFontRenderContext, getGraphicContext, getPaint, getRenderingHint, getRenderingHints, getStroke, getTransform, hit, rotate, rotate, scale, setBackground, setClip, setClip, setColor, setComposite, setFont, setPaint, setPaintMode, setRenderingHint, setRenderingHints, setStroke, setTransform, shear, transform, translate, translate
public DefaultGraphics2D(boolean textAsShapes)
public DefaultGraphics2D(DefaultGraphics2D g)
public java.awt.Graphics create()
Graphics
object that is
a copy of this Graphics
object.create
in class java.awt.Graphics
public boolean drawImage(java.awt.Image img, int x, int y, java.awt.image.ImageObserver observer)
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.
drawImage
in class java.awt.Graphics
img
- the specified image to be drawn.x
- the x coordinate.y
- the y coordinate.observer
- object to be notified as more of
the image is converted.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public boolean drawImage(java.awt.Image img, int x, int y, int width, int height, java.awt.image.ImageObserver observer)
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 draws 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.
drawImage
in class java.awt.Graphics
img
- the specified image to be drawn.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.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public void dispose()
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.
dispose
in class java.awt.Graphics
Graphics.finalize()
,
Component.paint(java.awt.Graphics)
,
Component.update(java.awt.Graphics)
,
Component.getGraphics()
,
Graphics.create()
public void draw(java.awt.Shape s)
Shape
using the settings of the
current Graphics2D
context. The rendering attributes
applied include the Clip
, Transform
,
Paint
, Composite
and
Stroke
attributes.draw
in class java.awt.Graphics2D
s
- the Shape
to be renderedAbstractGraphics2D.setStroke(java.awt.Stroke)
,
AbstractGraphics2D.setPaint(java.awt.Paint)
,
Graphics.setColor(java.awt.Color)
,
AbstractGraphics2D.setTransform(AffineTransform)
,
AbstractGraphics2D.setClip(Shape)
,
AbstractGraphics2D.setComposite(java.awt.Composite)
public void drawRenderedImage(java.awt.image.RenderedImage img, java.awt.geom.AffineTransform xform)
RenderedImage
,
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.drawRenderedImage
in class java.awt.Graphics2D
img
- the image to be renderedxform
- the transformation from image space into user spaceAbstractGraphics2D.setTransform(AffineTransform)
,
AbstractGraphics2D.setComposite(java.awt.Composite)
,
AbstractGraphics2D.setClip(Shape)
public void drawRenderableImage(java.awt.image.renderable.RenderableImage img, java.awt.geom.AffineTransform xform)
RenderableImage
,
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.
Rendering hints set on the Graphics2D
object might
be used in rendering the RenderableImage
.
If explicit control is required over specific hints recognized by a
specific RenderableImage
, or if knowledge of which hints
are used is required, then a RenderedImage
should be
obtained directly from the RenderableImage
and rendered using
drawRenderedImage
.
drawRenderableImage
in class java.awt.Graphics2D
img
- the image to be renderedxform
- the transformation from image space into user spaceAbstractGraphics2D.setTransform(AffineTransform)
,
AbstractGraphics2D.setComposite(java.awt.Composite)
,
AbstractGraphics2D.setClip(Shape)
,
drawRenderedImage(java.awt.image.RenderedImage, java.awt.geom.AffineTransform)
public void drawString(java.lang.String s, float x, float y)
String
,
using the current Font
and Paint
attributes
in the Graphics2D
context.
The baseline of the first character is at position
(x, y) in the User Space.
The rendering attributes applied include the Clip
,
Transform
, Paint
, Font
and
Composite
attributes. For characters in script systems
such as Hebrew and Arabic, the glyphs can be rendered from right to
left, in which case the coordinate supplied is the location of the
leftmost character on the baseline.drawString
in class java.awt.Graphics2D
s
- the String
to be renderedx
- the x coordinate where the String
should be
renderedy
- the y coordinate where the String
should be
renderedAbstractGraphics2D.setPaint(java.awt.Paint)
,
Graphics.setColor(java.awt.Color)
,
Graphics.setFont(java.awt.Font)
,
AbstractGraphics2D.setTransform(AffineTransform)
,
AbstractGraphics2D.setComposite(java.awt.Composite)
,
AbstractGraphics2D.setClip(Shape)
public void drawString(java.text.AttributedCharacterIterator iterator, float x, float y)
Graphics2D
context's current Paint
. The
iterator must specify a font
for each character. The baseline of the
first character is at position (x, y) in the
User Space.
The rendering attributes applied include the Clip
,
Transform
, Paint
, and
Composite
attributes.
For characters in script systems such as Hebrew and Arabic,
the glyphs can be rendered from right to left, in which case the
coordinate supplied is the location of the leftmost character
on the baseline.drawString
in class java.awt.Graphics2D
iterator
- the iterator whose text is to be renderedx
- the x coordinate where the iterator's text is to be renderedy
- the y coordinate where the iterator's text is to be renderedAbstractGraphics2D.setPaint(java.awt.Paint)
,
Graphics.setColor(java.awt.Color)
,
AbstractGraphics2D.setTransform(AffineTransform)
,
AbstractGraphics2D.setComposite(java.awt.Composite)
,
AbstractGraphics2D.setClip(Shape)
public void fill(java.awt.Shape s)
Shape
using the settings of the
Graphics2D
context. The rendering attributes applied
include the Clip
, Transform
,
Paint
, and Composite
.fill
in class java.awt.Graphics2D
s
- the Shape
to be filledAbstractGraphics2D.setPaint(java.awt.Paint)
,
Graphics.setColor(java.awt.Color)
,
AbstractGraphics2D.setTransform(AffineTransform)
,
AbstractGraphics2D.setComposite(java.awt.Composite)
,
AbstractGraphics2D.setClip(Shape)
public java.awt.GraphicsConfiguration getDeviceConfiguration()
Graphics2D
.getDeviceConfiguration
in class java.awt.Graphics2D
public java.awt.FontMetrics getFontMetrics(java.awt.Font f)
getFontMetrics
in class java.awt.Graphics
f
- the specified fontGraphics.getFont()
,
FontMetrics
,
Graphics.getFontMetrics()
public void setXORMode(java.awt.Color c1)
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.
setXORMode
in class java.awt.Graphics
c1
- the XOR alternation colorpublic void copyArea(int x, int y, int width, int height, int dx, int dy)
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.copyArea
in class java.awt.Graphics
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.Copyright © 2022 Apache Software Foundation. All Rights Reserved.