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java.lang.Object
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+--java.awt.Graphics
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+--java.awt.Graphics2D
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+--org.jfree.report.modules.gui.config.BugFixProxyGraphics2D
This documents another sad chapter in Sun's java implementation. The tree cell renderer does not check the clipping of the painted graphics correctly.
This bug seems to be related to the TreeCellRenderer's unability to display the defined (and drawn) background of the CellRenderers render component. A first hint of that bug can be found at http://www.cs.cf.ac.uk/Dave/HCI/HCI_Handout_CALLER/node155.html
| Constructor Summary | |
BugFixProxyGraphics2D(java.awt.Graphics2D parent)
Creates a new proxy to fix some of the Swing bugs. |
|
| Method Summary | |
void |
addRenderingHints(java.util.Map hints)
Forwards the call to the parent. |
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. |
void |
clip(java.awt.Shape s)
Intersects the current Clip with the interior of the specified
Shape and sets the Clip to the resulting intersection. |
void |
clipRect(int x,
int y,
int width,
int height)
Intersects the current clip with the specified rectangle. |
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)
Forwards the call to the parent. |
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. |
void |
drawGlyphVector(java.awt.font.GlyphVector g,
float x,
float y)
Forwards the call to the parent. |
void |
drawImage(java.awt.image.BufferedImage img,
java.awt.image.BufferedImageOp op,
int x,
int y)
Renders a BufferedImage that is filtered with a BufferedImageOp.
|
boolean |
drawImage(java.awt.Image img,
java.awt.geom.AffineTransform xform,
java.awt.image.ImageObserver obs)
Forwards the call to the parent. |
boolean |
drawImage(java.awt.Image img,
int x,
int y,
java.awt.Color bgcolor,
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,
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.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. |
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. |
boolean |
drawImage(java.awt.Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
java.awt.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. |
boolean |
drawImage(java.awt.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. |
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. |
void |
drawOval(int x,
int y,
int width,
int height)
Draws the outline of an oval. |
void |
drawPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
Draws a closed polygon defined by arrays of x and y coordinates. |
void |
drawPolygon(java.awt.Polygon p)
Draws the outline of a polygon defined by the specified Polygon object. |
void |
drawPolyline(int[] xPoints,
int[] yPoints,
int nPoints)
Draws a sequence of connected lines defined by arrays of x and y coordinates. |
void |
drawRect(int x,
int y,
int width,
int height)
Draws the outline of the specified rectangle. |
void |
drawRenderableImage(java.awt.image.renderable.RenderableImage img,
java.awt.geom.AffineTransform xform)
Forwards the call to the parent. |
void |
drawRenderedImage(java.awt.image.RenderedImage img,
java.awt.geom.AffineTransform xform)
Forwards the call to the parent. |
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. |
void |
drawString(java.text.AttributedCharacterIterator iterator,
float x,
float y)
Forwards the call to the parent. |
void |
drawString(java.text.AttributedCharacterIterator iterator,
int x,
int y)
Forwards the call to the parent. |
void |
drawString(java.lang.String s,
float x,
float y)
Forwards the call to the parent. |
void |
drawString(java.lang.String str,
int x,
int y)
Forwards the call to the parent. |
void |
fill(java.awt.Shape s)
Forwards the call to the parent. |
void |
fillArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
Fills a circular or elliptical arc covering the specified rectangle. |
void |
fillOval(int x,
int y,
int width,
int height)
Fills an oval bounded by the specified rectangle with the current color. |
void |
fillPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
Fills a closed polygon defined by arrays of x and y coordinates. |
void |
fillPolygon(java.awt.Polygon p)
Fills the polygon defined by the specified Polygon object with the graphics context's current color. |
void |
fillRect(int x,
int y,
int width,
int height)
Fills the specified rectangle. |
void |
fillRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
Fills the specified rounded corner rectangle with the current color. |
java.awt.Color |
getBackground()
Returns the background color used for clearing a region. |
java.awt.Shape |
getClip()
Gets the current clipping area. |
java.awt.Rectangle |
getClipBounds()
Returns the bounding rectangle of the current clipping area. |
java.awt.Color |
getColor()
Gets this graphics context's current color. |
java.awt.Composite |
getComposite()
Returns the current Composite in the Graphics2D context. |
java.awt.GraphicsConfiguration |
getDeviceConfiguration()
Returns the device configuration associated with this Graphics2D. |
java.awt.Font |
getFont()
Gets the current font. |
java.awt.FontMetrics |
getFontMetrics(java.awt.Font f)
Gets the font metrics for the specified font. |
java.awt.font.FontRenderContext |
getFontRenderContext()
Get the rendering context of the Font within this
Graphics2D context. |
java.awt.Paint |
getPaint()
Returns the current Paint of the Graphics2D context. |
java.lang.Object |
getRenderingHint(java.awt.RenderingHints.Key hintKey)
Forwards the call to the parent. |
java.awt.RenderingHints |
getRenderingHints()
Forwards the call to the parent. |
java.awt.Stroke |
getStroke()
Returns the current Stroke in the Graphics2D context. |
java.awt.geom.AffineTransform |
getTransform()
Returns a copy of the current Transform in the Graphics2D
context. |
boolean |
hit(java.awt.Rectangle rect,
java.awt.Shape s,
boolean onStroke)
Forwards the call to the parent. |
void |
rotate(double theta)
Concatenates the current Graphics2D Transform with a
rotation transform. |
void |
rotate(double theta,
double x,
double y)
Concatenates the current Graphics2D Transform with a
translated rotation transform. |
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. |
void |
setBackground(java.awt.Color color)
Sets the background color for the Graphics2D context. |
void |
setClip(int x,
int y,
int width,
int height)
Sets the current clip to the rectangle specified by the given coordinates. |
void |
setClip(java.awt.Shape clip)
Sets the current clipping area to an arbitrary clip shape. |
void |
setColor(java.awt.Color c)
Sets this graphics context's current color to the specified color. |
void |
setComposite(java.awt.Composite comp)
Forwards the call to the parent. |
void |
setFont(java.awt.Font font)
Sets this graphics context's font to the specified font. |
void |
setPaint(java.awt.Paint paint)
Forwards the call to the parent. |
void |
setPaintMode()
Sets the paint mode of this graphics context to overwrite the destination with this graphics context's current color. |
void |
setRenderingHint(java.awt.RenderingHints.Key hintKey,
java.lang.Object hintValue)
Forwards the call to the parent. |
void |
setRenderingHints(java.util.Map hints)
Forwards the call to the parent. |
void |
setStroke(java.awt.Stroke s)
Sets the Stroke for the Graphics2D context. |
void |
setTransform(java.awt.geom.AffineTransform tx)
Overwrites the Transform in the Graphics2D context. |
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. |
void |
shear(double shx,
double shy)
Concatenates the current Graphics2D Transform with a
shearing transform. |
void |
transform(java.awt.geom.AffineTransform tx)
Composes an AffineTransform object with the Transform in
this Graphics2D according to the rule last-specified-first-applied. |
void |
translate(double tx,
double ty)
Concatenates the current Graphics2D Transform with a
translation transform. |
void |
translate(int x,
int y)
Forwards the call to the parent. |
| Methods inherited from class java.awt.Graphics2D |
draw3DRect,
fill3DRect |
| Methods inherited from class java.awt.Graphics |
create,
drawBytes,
drawChars,
finalize,
getClipBounds,
getClipRect,
getFontMetrics,
hitClip,
toString |
| Methods inherited from class java.lang.Object |
clone,
equals,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
| Constructor Detail |
public BugFixProxyGraphics2D(java.awt.Graphics2D parent)
parent - the original graphics object| Method Detail |
public void draw(java.awt.Shape s)
s - the Shape to be rendered
public boolean drawImage(java.awt.Image img,
java.awt.geom.AffineTransform xform,
java.awt.image.ImageObserver obs)
img - the Image to be renderedxform - the transformation from image space into user spaceobs - the ImageObserver to be notified as more of the
Image is convertedtrue if the Image is fully loaded and completely
rendered; false if the Image is still being
loaded.
public void drawImage(java.awt.image.BufferedImage img,
java.awt.image.BufferedImageOp op,
int x,
int y)
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);
op - the filter to be applied to the image before renderingimg - the BufferedImage to be renderedx - the painting location ...y - the location in user space where the upper left corner of the image is
renderedtransform(java.awt.geom.AffineTransform),
setTransform(java.awt.geom.AffineTransform),
setComposite(java.awt.Composite),
clip(java.awt.Shape),
setClip(int, int, int, int)
public void drawRenderedImage(java.awt.image.RenderedImage img,
java.awt.geom.AffineTransform xform)
img - the image to be renderedxform - the transformation from image space into user space
public void drawRenderableImage(java.awt.image.renderable.RenderableImage img,
java.awt.geom.AffineTransform xform)
img - the image to be renderedxform - the transformation from image space into user space
public void drawString(java.lang.String str,
int x,
int y)
str - the string to be renderedx - coordinatesy - the coordinates where the String should be renderedstr is null
public void drawString(java.lang.String s,
float x,
float y)
s - the String to be renderedx - coordinates.y - the coordinates where the String should be renderedstr is null
public void drawString(java.text.AttributedCharacterIterator iterator,
int x,
int y)
iterator - the iterator whose text is to be renderedx - coords.y - the coordinates where the iterator's text is to be rendered
public void drawString(java.text.AttributedCharacterIterator iterator,
float x,
float y)
iterator - the iterator whose text is to be renderedx - coordsy - the coordinates where the iterator's text is to be rendered
public void drawGlyphVector(java.awt.font.GlyphVector g,
float x,
float y)
g - the GlyphVector to be renderedx - coordinates.y - the position in User Space where the glyphs should be renderedpublic void fill(java.awt.Shape s)
s - the Shape to be filled
public boolean hit(java.awt.Rectangle rect,
java.awt.Shape s,
boolean onStroke)
rect - the area in device space to check for a hits - the Shape to check for a hitonStroke - flag used to choose between testing the stroked or the filled shape.
If the flag is true, the Stroke oultine is
tested. If the flag is false, the filled
Shape is tested.true if there is a hit; false otherwise.public java.awt.GraphicsConfiguration getDeviceConfiguration()
Graphics2D.Graphics2D.public void setComposite(java.awt.Composite comp)
comp - the Composite object to be used for renderingComposite object is being used to
render to the screen and a security manager is set and its
checkPermission method does not allow the
operation.public void setPaint(java.awt.Paint paint)
paint - the Paint object to be used to generate color during the
rendering process, or nullpublic void setStroke(java.awt.Stroke s)
Stroke for the Graphics2D context.s - the Stroke object to be used to stroke a Shape
during the rendering process
public void setRenderingHint(java.awt.RenderingHints.Key hintKey,
java.lang.Object hintValue)
hintKey - the key of the hint to be set.hintValue - the value indicating preferences for the specified hint category.public java.lang.Object getRenderingHint(java.awt.RenderingHints.Key hintKey)
hintKey - the key corresponding to the hint to get.RenderingHints
class.public void setRenderingHints(java.util.Map hints)
hints - the rendering hints to be setpublic void addRenderingHints(java.util.Map hints)
hints - the rendering hints to be setpublic java.awt.RenderingHints getRenderingHints()
RenderingHints that contains the
current preferences.
public void translate(int x,
int y)
x - coords.y - the specified coordinates
public void translate(double tx,
double ty)
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 ]
tx - the distance to translate along the x-axisty - the distance to translate along the y-axispublic void rotate(double theta)
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.
theta - the angle of rotation in radians
public void rotate(double theta,
double x,
double y)
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.
theta - the angle of rotation in radiansx - coords.y - coordinates of the origin of the rotation
public void scale(double sx,
double sy)
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 ]
sx - the amount by which X coordinates in subsequent rendering operations are
multiplied relative to previous rendering operations.sy - the amount by which Y coordinates in subsequent rendering operations are
multiplied relative to previous rendering operations.
public void shear(double shx,
double shy)
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 ]
shx - the multiplier by which coordinates are shifted in the positive X axis
direction as a function of their Y coordinateshy - the multiplier by which coordinates are shifted in the positive Y axis
direction as a function of their X coordinatepublic void transform(java.awt.geom.AffineTransform tx)
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.tx - the AffineTransform object to be composed with the current
TransformsetTransform(java.awt.geom.AffineTransform),
AffineTransformpublic void setTransform(java.awt.geom.AffineTransform tx)
Graphics2D context. WARNING: This method
should never be used to apply a new coordinate transform on top of an existing
transform because the Graphics2D might already have a transform that is
needed for other purposes, such as rendering Swing components or applying a scaling
transformation to adjust for the resolution of a printer. To add a coordinate
transform, use the transform, rotate, scale,
or shear methods. The setTransform method is intended only
for restoring the original Graphics2D transform after rendering, as
shown in this example:
// Get the current transform AffineTransform saveAT = g2.getTransform(); // Perform transformation g2d.transform(...); // Render g2d.draw(...); // Restore original transform g2d.setTransform(saveAT);
tx - the AffineTransform that was retrieved from the
getTransform methodtransform(java.awt.geom.AffineTransform),
getTransform(),
AffineTransformpublic java.awt.geom.AffineTransform getTransform()
Transform in the Graphics2D
context.AffineTransform in the Graphics2D
context.transform(java.awt.geom.AffineTransform),
setTransform(java.awt.geom.AffineTransform)public java.awt.Paint getPaint()
Paint of the Graphics2D context.Graphics2D Paint, which defines a color
or pattern.setPaint(java.awt.Paint),
Graphics.setColor(java.awt.Color)public java.awt.Composite getComposite()
Composite in the Graphics2D context.Graphics2D Composite, which defines a
compositing style.setComposite(java.awt.Composite)public void setBackground(java.awt.Color color)
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.color - the background color that isused in subsequent calls to
clearRectgetBackground(),
Graphics.clearRect(int, int, int, int)public java.awt.Color getBackground()
Graphics2D Color, which defines the
background color.setBackground(java.awt.Color)public java.awt.Stroke getStroke()
Stroke in the Graphics2D context.Graphics2D Stroke, which defines the
line style.setStroke(java.awt.Stroke)public void clip(java.awt.Shape s)
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 setClip with a null argument, the
specified Shape becomes the new user clip.s - the Shape to be intersected with the current Clip.
If s is null, this method clears the current
Clip.public java.awt.font.FontRenderContext getFontRenderContext()
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.FontRenderContext,
Font.createGlyphVector(java.awt.font.FontRenderContext, java.lang.String),
java.awt.font.TextLayoutpublic java.awt.Graphics create()
Graphics object that is a copy of this
Graphics object.public java.awt.Color getColor()
Color,
Graphics.setColor(Color)public void setColor(java.awt.Color c)
c - the new rendering color.Color,
Graphics.getColor()public void setPaintMode()
public void setXORMode(java.awt.Color c1)
c1 - the XOR alternation colorpublic java.awt.Font getFont()
Font,
Graphics.setFont(Font)public void setFont(java.awt.Font font)
font - the font.Graphics.getFont(),
Graphics.drawString(String, int, int),
Graphics.drawBytes(byte[], int, int, int, int),
Graphics.drawChars(char[], int, int, int, int)public java.awt.FontMetrics getFontMetrics(java.awt.Font f)
f - the specified fontGraphics.getFont(),
FontMetrics,
Graphics.getFontMetrics()public java.awt.Rectangle getClipBounds()
setClip(null), this method returns null. The
coordinates in the rectangle are relative to the coordinate system origin of this
graphics context.null if
no clip is set.Graphics.getClip(),
Graphics.clipRect(int, int, int, int),
Graphics.setClip(int, int, int, int),
Graphics.setClip(Shape)
public void clipRect(int x,
int y,
int width,
int height)
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.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 withsetClip(int, int, int, int),
setClip(Shape)
public void setClip(int x,
int y,
int width,
int height)
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.Graphics.clipRect(int, int, int, int),
Graphics.setClip(Shape),
Graphics.getClip()public java.awt.Shape getClip()
setClip(null), this method returns null.Shape object representing the current clipping area, or
null if no clip is set.Graphics.getClipBounds(),
Graphics.clipRect(int, int, int, int),
Graphics.setClip(int, int, int, int),
Graphics.setClip(Shape)public void setClip(java.awt.Shape clip)
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.clip - the Shape to use to set the clipGraphics.getClip(),
Graphics.clipRect(int, int, int, int),
Graphics.setClip(int, int, int, int)
public 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.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.
public void drawLine(int x1,
int y1,
int x2,
int y2)
(x1, y1)
and (x2, y2) in this graphics context's coordinate system.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.
public void fillRect(int x,
int y,
int width,
int height)
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.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.Graphics.clearRect(int, int, int, int),
Graphics.drawRect(int, int, int, int)
public void clearRect(int x,
int y,
int width,
int height)
setColor followed by
fillRect to ensure that an offscreen image is cleared to a specific
color.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.Graphics.fillRect(int, int, int, int),
Graphics.drawRect(int, int, int, int),
Graphics.setColor(Color),
Graphics.setPaintMode(),
Graphics.setXORMode(Color)
public void drawRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
x and
x + width, respectively. The top and bottom edges of the
rectangle are at y and y + height.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.Graphics.fillRoundRect(int, int, int, int, int, int)
public void fillRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
x and x + width - 1,
respectively. The top and bottom edges of the rectangle are at y and
y + height - 1.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.Graphics.drawRoundRect(int, int, int, int, int, int)
public void drawOval(int x,
int y,
int width,
int height)
x, y, width, and
height arguments.
The oval covers an area that is width + 1 pixels wide and
height + 1 pixels tall.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.Graphics.fillOval(int, int, int, int)
public void fillOval(int x,
int y,
int width,
int height)
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.Graphics.drawOval(int, int, int, int)
public void drawArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
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.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.Graphics.fillArc(int, int, int, int, int, int)
public void fillArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
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.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.Graphics.drawArc(int, int, int, int, int, int)
public void drawPolyline(int[] xPoints,
int[] yPoints,
int nPoints)
xPoints - an array of x pointsyPoints - an array of y pointsnPoints - the total number of pointsGraphics.drawPolygon(int[], int[], int)
public void drawPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
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.xPoints - a an array of x coordinates.yPoints - a an array of y coordinates.nPoints - a the total number of points.Graphics.fillPolygon(java.awt.Polygon),
Graphics.drawPolyline(int[], int[], int)
public void fillPolygon(int[] xPoints,
int[] yPoints,
int nPoints)
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.xPoints - a an array of x coordinates.yPoints - a an array of y coordinates.nPoints - a the total number of points.Graphics.drawPolygon(int[], int[], int)
public boolean drawImage(java.awt.Image img,
int x,
int y,
java.awt.image.ImageObserver observer)
drawImage returns
false. As more of the image becomes available, the process that draws
the image notifies the specified image observer.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.true if the image is completely loaded; false
otherwise.Image,
ImageObserver,
ImageObserver.imageUpdate(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)
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.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.true if the current output representation is complete;
false otherwise.Image,
ImageObserver,
ImageObserver.imageUpdate(Image, int, int, int, int, int)
public boolean drawImage(java.awt.Image img,
int x,
int y,
java.awt.Color bgcolor,
java.awt.image.ImageObserver observer)
drawImage returns
false. As more of the image becomes available, the process that draws
the image notifies the specified image observer.img - the specified image to be drawn.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.true if the image is completely loaded; false
otherwise.Image,
ImageObserver,
ImageObserver.imageUpdate(Image, int, int, int, int, int)
public boolean drawImage(java.awt.Image img,
int x,
int y,
int width,
int height,
java.awt.Color bgcolor,
java.awt.image.ImageObserver observer)
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.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.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.true if the current output representation is complete;
false otherwise.Image,
ImageObserver,
ImageObserver.imageUpdate(Image, int, int, int, int, int)
public boolean drawImage(java.awt.Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
java.awt.image.ImageObserver observer)
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.img - the specified image to be drawndx1 - 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.true if the current output representation is complete;
false otherwise.Image,
ImageObserver,
ImageObserver.imageUpdate(Image, int, int, int, int, int)
public boolean drawImage(java.awt.Image img,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
java.awt.Color bgcolor,
java.awt.image.ImageObserver observer)
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.img - the specified image to be drawndx1 - 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.true if the current output representation is complete;
false otherwise.Image,
ImageObserver,
ImageObserver.imageUpdate(Image, int, int, int, int, int)public void dispose()
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.Graphics.finalize(),
Component.paint(java.awt.Graphics),
Component.update(java.awt.Graphics),
Component.getGraphics(),
Graphics.create()
public void drawRect(int x,
int y,
int width,
int height)
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.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.Graphics.fillRect(int, int, int, int),
Graphics.clearRect(int, int, int, int)public void drawPolygon(java.awt.Polygon p)
Polygon object.p - the polygon to draw.Graphics.fillPolygon(java.awt.Polygon),
Graphics.drawPolyline(int[], int[], int)public void fillPolygon(java.awt.Polygon p)
p - the polygon to fill.Graphics.drawPolygon(int[], int[], int)
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