org.apache.batik.ext.awt.g2d
Class DefaultGraphics2D

java.lang.Object
  extended by java.awt.Graphics
      extended by java.awt.Graphics2D
          extended by org.apache.batik.ext.awt.g2d.AbstractGraphics2D
              extended by org.apache.batik.ext.awt.g2d.DefaultGraphics2D
All Implemented Interfaces:
Cloneable

public class DefaultGraphics2D
extends AbstractGraphics2D

This concrete implementation of 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.

See Also:
AbstractGraphics2D

Field Summary
 
Fields inherited from class org.apache.batik.ext.awt.g2d.AbstractGraphics2D
gc, textAsShapes
 
Constructor Summary
DefaultGraphics2D(boolean textAsShapes)
          Default constructor
DefaultGraphics2D(DefaultGraphics2D g)
          This constructor supports the create method
 
Method Summary
 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.
 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(Shape s)
          Strokes the outline of a Shape using the settings of the current Graphics2D context.
 boolean drawImage(Image img, int x, int y, ImageObserver observer)
          Draws as much of the specified image as is currently available.
 boolean drawImage(Image img, int x, int y, int width, int height, ImageObserver observer)
          Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.
 void drawRenderableImage(RenderableImage img, AffineTransform xform)
          Renders a RenderableImage, applying a transform from image space into user space before drawing.
 void drawRenderedImage(RenderedImage img, AffineTransform xform)
          Renders a RenderedImage, applying a transform from image space into user space before drawing.
 void drawString(AttributedCharacterIterator iterator, float x, float y)
          Renders the text of the specified iterator, using the Graphics2D context's current Paint.
 void drawString(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(Shape s)
          Fills the interior of a Shape using the settings of the Graphics2D context.
 GraphicsConfiguration getDeviceConfiguration()
          Returns the device configuration associated with this Graphics2D.
 FontMetrics getFontMetrics(Font f)
          Gets the font metrics for the specified font.
 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.
 
Methods inherited from class org.apache.batik.ext.awt.g2d.AbstractGraphics2D
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
 
Methods inherited from class java.awt.Graphics2D
draw3DRect, fill3DRect
 
Methods inherited from class java.awt.Graphics
create, drawBytes, drawChars, drawPolygon, fillPolygon, finalize, getClipBounds, getClipRect, getFontMetrics, hitClip, toString
 
Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

DefaultGraphics2D

public DefaultGraphics2D(boolean textAsShapes)
Default constructor


DefaultGraphics2D

public DefaultGraphics2D(DefaultGraphics2D g)
This constructor supports the create method

Method Detail

create

public Graphics create()
Creates a new Graphics object that is a copy of this Graphics object.

Specified by:
create in class Graphics
Returns:
a new graphics context that is a copy of this graphics context.

drawImage

public boolean drawImage(Image img,
                         int x,
                         int y,
                         ImageObserver observer)
Draws as much of the specified image as is currently available. The image is drawn with its top-left corner at (xy) 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 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.

Specified by:
drawImage in class Graphics
Parameters:
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.
See Also:
Image, ImageObserver, ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)

drawImage

public boolean drawImage(Image img,
                         int x,
                         int y,
                         int width,
                         int height,
                         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 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.

Specified by:
drawImage in class Graphics
Parameters:
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.
See Also:
Image, ImageObserver, ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)

dispose

public void dispose()
Disposes of this graphics context and releases any system resources that it is using. A Graphics object cannot be used after disposehas 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.

Specified by:
dispose in class Graphics
See Also:
Graphics.finalize(), Component.paint(java.awt.Graphics), Component.update(java.awt.Graphics), Component.getGraphics(), Graphics.create()

draw

public void draw(Shape s)
Strokes the outline of a Shape using the settings of the current Graphics2D context. The rendering attributes applied include the Clip, Transform, Paint, Composite and Stroke attributes.

Specified by:
draw in class Graphics2D
Parameters:
s - the Shape to be rendered
See Also:
AbstractGraphics2D.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)

drawRenderedImage

public void drawRenderedImage(RenderedImage img,
                              AffineTransform xform)
Renders a 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.

Specified by:
drawRenderedImage in class Graphics2D
Parameters:
img - the image to be rendered
xform - the transformation from image space into user space
See Also:
AbstractGraphics2D.setTransform(AffineTransform), AbstractGraphics2D.setComposite(java.awt.Composite), AbstractGraphics2D.setClip(Shape)

drawRenderableImage

public void drawRenderableImage(RenderableImage img,
                                AffineTransform xform)
Renders a 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.

Specified by:
drawRenderableImage in class Graphics2D
Parameters:
img - the image to be rendered
xform - the transformation from image space into user space
See Also:
AbstractGraphics2D.setTransform(AffineTransform), AbstractGraphics2D.setComposite(java.awt.Composite), AbstractGraphics2D.setClip(Shape), drawRenderedImage(java.awt.image.RenderedImage, java.awt.geom.AffineTransform)

drawString

public void drawString(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. The baseline of the first character is at position (xy) 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.

Specified by:
drawString in class Graphics2D
Parameters:
s - the String to be rendered
x - the x coordinate where the String should be rendered
y - the y coordinate where the String should be rendered
See Also:
AbstractGraphics2D.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)

drawString

public void drawString(AttributedCharacterIterator iterator,
                       float x,
                       float y)
Renders the text of the specified iterator, using the Graphics2D context's current Paint. The iterator must specify a font for each character. The baseline of the first character is at position (xy) 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.

Specified by:
drawString in class Graphics2D
Parameters:
iterator - the iterator whose text is to be rendered
x - the x coordinate where the iterator's text is to be rendered
y - the y coordinate where the iterator's text is to be rendered
See Also:
AbstractGraphics2D.setPaint(java.awt.Paint), Graphics.setColor(java.awt.Color), AbstractGraphics2D.setTransform(AffineTransform), AbstractGraphics2D.setComposite(java.awt.Composite), AbstractGraphics2D.setClip(Shape)

fill

public void fill(Shape s)
Fills the interior of a Shape using the settings of the Graphics2D context. The rendering attributes applied include the Clip, Transform, Paint, and Composite.

Specified by:
fill in class Graphics2D
Parameters:
s - the Shape to be filled
See Also:
AbstractGraphics2D.setPaint(java.awt.Paint), Graphics.setColor(java.awt.Color), AbstractGraphics2D.setTransform(AffineTransform), AbstractGraphics2D.setComposite(java.awt.Composite), AbstractGraphics2D.setClip(Shape)

getDeviceConfiguration

public GraphicsConfiguration getDeviceConfiguration()
Returns the device configuration associated with this Graphics2D.

Specified by:
getDeviceConfiguration in class Graphics2D

getFontMetrics

public FontMetrics getFontMetrics(Font f)
Gets the font metrics for the specified font.

Specified by:
getFontMetrics in class Graphics
Parameters:
f - the specified font
Returns:
the font metrics for the specified font.
See Also:
Graphics.getFont(), FontMetrics, Graphics.getFontMetrics()

setXORMode

public 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.

Specified by:
setXORMode in class Graphics
Parameters:
c1 - the XOR alternation color

copyArea

public 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.

Specified by:
copyArea in class Graphics
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.


Copyright © 2008 Apache Software Foundation. All Rights Reserved.