Class BugFixProxyGraphics2D
- java.lang.Object
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- java.awt.Graphics
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- java.awt.Graphics2D
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- org.pentaho.reporting.tools.configeditor.util.BugFixProxyGraphics2D
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public class BugFixProxyGraphics2D extends Graphics2D
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- Author:
- Thomas Morgner
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Constructor Summary
Constructors Constructor Description BugFixProxyGraphics2D(Graphics2D parent)
Creates a new proxy to fix some of the Swing bugs.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addRenderingHints(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(Shape s)
Intersects the currentClip
with the interior of the specifiedShape
and sets theClip
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 bydx
anddy
.Graphics
create()
Creates a newGraphics
object that is a copy of thisGraphics
object.void
dispose()
Disposes of this graphics context and releases any system resources that it is using.void
draw(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(GlyphVector g, float x, float y)
Forwards the call to the parent.void
drawImage(BufferedImage img, BufferedImageOp op, int x, int y)
Renders aBufferedImage
that is filtered with aBufferedImageOp
.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.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.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.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.boolean
drawImage(Image img, int x, int y, Color bgcolor, ImageObserver observer)
Draws as much of the specified image as is currently available.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, AffineTransform xform, ImageObserver obs)
Forwards the call to the parent.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(Polygon p)
Draws the outline of a polygon defined by the specifiedPolygon
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(RenderableImage img, AffineTransform xform)
Forwards the call to the parent.void
drawRenderedImage(RenderedImage img, 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(String s, float x, float y)
Forwards the call to the parent.void
drawString(String str, int x, int y)
Forwards the call to the parent.void
drawString(AttributedCharacterIterator iterator, float x, float y)
Forwards the call to the parent.void
drawString(AttributedCharacterIterator iterator, int x, int y)
Forwards the call to the parent.void
fill(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(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.Color
getBackground()
Returns the background color used for clearing a region.Shape
getClip()
Gets the current clipping area.Rectangle
getClipBounds()
Returns the bounding rectangle of the current clipping area.Color
getColor()
Gets this graphics context's current color.Composite
getComposite()
Returns the currentComposite
in theGraphics2D
context.GraphicsConfiguration
getDeviceConfiguration()
Returns the device configuration associated with thisGraphics2D
.Font
getFont()
Gets the current font.FontMetrics
getFontMetrics(Font f)
Gets the font metrics for the specified font.FontRenderContext
getFontRenderContext()
Get the rendering context of theFont
within thisGraphics2D
context.Paint
getPaint()
Returns the currentPaint
of theGraphics2D
context.Object
getRenderingHint(RenderingHints.Key hintKey)
Forwards the call to the parent.RenderingHints
getRenderingHints()
Forwards the call to the parent.Stroke
getStroke()
Returns the currentStroke
in theGraphics2D
context.AffineTransform
getTransform()
Returns a copy of the currentTransform
in theGraphics2D
context.boolean
hit(Rectangle rect, Shape s, boolean onStroke)
Forwards the call to the parent.void
rotate(double theta)
Concatenates the currentGraphics2D
Transform
with a rotation transform.void
rotate(double theta, double x, double y)
Concatenates the currentGraphics2D
Transform
with a translated rotation transform.void
scale(double sx, double sy)
Concatenates the currentGraphics2D
Transform
with a scaling transformation Subsequent rendering is resized according to the specified scaling factors relative to the previous scaling.void
setBackground(Color color)
Sets the background color for theGraphics2D
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(Shape clip)
Sets the current clipping area to an arbitrary clip shape.void
setColor(Color c)
Sets this graphics context's current color to the specified color.void
setComposite(Composite comp)
Forwards the call to the parent.void
setFont(Font font)
Sets this graphics context's font to the specified font.void
setPaint(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(RenderingHints.Key hintKey, Object hintValue)
Forwards the call to the parent.void
setRenderingHints(Map hints)
Forwards the call to the parent.void
setStroke(Stroke s)
Sets theStroke
for theGraphics2D
context.void
setTransform(AffineTransform tx)
Overwrites the Transform in theGraphics2D
context.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.void
shear(double shx, double shy)
Concatenates the currentGraphics2D
Transform
with a shearing transform.void
transform(AffineTransform tx)
Composes anAffineTransform
object with theTransform
in thisGraphics2D
according to the rule last-specified-first-applied.void
translate(double tx, double ty)
Concatenates the currentGraphics2D
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
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Methods inherited from class java.awt.Graphics
create, drawBytes, drawChars, finalize, getClipBounds, getClipRect, getFontMetrics, hitClip, toString
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Constructor Detail
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BugFixProxyGraphics2D
public BugFixProxyGraphics2D(Graphics2D parent)
Creates a new proxy to fix some of the Swing bugs.- Parameters:
parent
- the original graphics object
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Method Detail
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draw
public void draw(Shape s)
Forwards the call to the parent.- Specified by:
draw
in classGraphics2D
- Parameters:
s
- theShape
to be rendered
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drawImage
public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs)
Forwards the call to the parent.- Specified by:
drawImage
in classGraphics2D
- Parameters:
img
- theImage
to be renderedxform
- the transformation from image space into user spaceobs
- theImageObserver
to be notified as more of theImage
is converted- Returns:
true
if theImage
is fully loaded and completely rendered;false
if theImage
is still being loaded.
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drawImage
public void drawImage(BufferedImage img, BufferedImageOp op, int x, int y)
Renders aBufferedImage
that is filtered with aBufferedImageOp
. The rendering attributes applied include theClip
,Transform
andComposite
attributes. This is equivalent to:img1 = op.filter(img, null); drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null);
- Specified by:
drawImage
in classGraphics2D
- Parameters:
op
- the filter to be applied to the image before renderingimg
- theBufferedImage
to be renderedx
- the painting location ...y
- the location in user space where the upper left corner of the image is rendered- See Also:
transform(java.awt.geom.AffineTransform)
,setTransform(java.awt.geom.AffineTransform)
,setComposite(java.awt.Composite)
,clip(java.awt.Shape)
,setClip(int, int, int, int)
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drawRenderedImage
public void drawRenderedImage(RenderedImage img, AffineTransform xform)
Forwards the call to the parent.- Specified by:
drawRenderedImage
in classGraphics2D
- Parameters:
img
- the image to be renderedxform
- the transformation from image space into user space
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drawRenderableImage
public void drawRenderableImage(RenderableImage img, AffineTransform xform)
Forwards the call to the parent.- Specified by:
drawRenderableImage
in classGraphics2D
- Parameters:
img
- the image to be renderedxform
- the transformation from image space into user space
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drawString
public void drawString(String str, int x, int y)
Forwards the call to the parent.- Specified by:
drawString
in classGraphics2D
- Parameters:
str
- the string to be renderedx
- coordinatesy
- the coordinates where theString
should be rendered- Throws:
NullPointerException
- ifstr
isnull
- Since:
- JDK1.0
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drawString
public void drawString(String s, float x, float y)
Forwards the call to the parent.- Specified by:
drawString
in classGraphics2D
- Parameters:
s
- theString
to be renderedx
- coordinates.y
- the coordinates where theString
should be rendered- Throws:
NullPointerException
- ifstr
isnull
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drawString
public void drawString(AttributedCharacterIterator iterator, int x, int y)
Forwards the call to the parent.- Specified by:
drawString
in classGraphics2D
- Parameters:
iterator
- the iterator whose text is to be renderedx
- coords.y
- the coordinates where the iterator's text is to be rendered
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drawString
public void drawString(AttributedCharacterIterator iterator, float x, float y)
Forwards the call to the parent.- Specified by:
drawString
in classGraphics2D
- Parameters:
iterator
- the iterator whose text is to be renderedx
- coordsy
- the coordinates where the iterator's text is to be rendered
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drawGlyphVector
public void drawGlyphVector(GlyphVector g, float x, float y)
Forwards the call to the parent.- Specified by:
drawGlyphVector
in classGraphics2D
- Parameters:
g
- theGlyphVector
to be renderedx
- coordinates.y
- the position in User Space where the glyphs should be rendered
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fill
public void fill(Shape s)
Forwards the call to the parent.- Specified by:
fill
in classGraphics2D
- Parameters:
s
- theShape
to be filled
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hit
public boolean hit(Rectangle rect, Shape s, boolean onStroke)
Forwards the call to the parent.- Specified by:
hit
in classGraphics2D
- Parameters:
rect
- the area in device space to check for a hits
- theShape
to check for a hitonStroke
- flag used to choose between testing the stroked or the filled shape. If the flag istrue
, theStroke
oultine is tested. If the flag isfalse
, the filledShape
is tested.- Returns:
true
if there is a hit;false
otherwise.
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getDeviceConfiguration
public GraphicsConfiguration getDeviceConfiguration()
Returns the device configuration associated with thisGraphics2D
.- Specified by:
getDeviceConfiguration
in classGraphics2D
- Returns:
- the device configuration of this
Graphics2D
.
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setComposite
public void setComposite(Composite comp)
Forwards the call to the parent.- Specified by:
setComposite
in classGraphics2D
- Parameters:
comp
- theComposite
object to be used for rendering- Throws:
SecurityException
- if a customComposite
object is being used to render to the screen and a security manager is set and itscheckPermission
method does not allow the operation.
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setPaint
public void setPaint(Paint paint)
Forwards the call to the parent.- Specified by:
setPaint
in classGraphics2D
- Parameters:
paint
- thePaint
object to be used to generate color during the rendering process, ornull
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setStroke
public void setStroke(Stroke s)
Sets theStroke
for theGraphics2D
context.- Specified by:
setStroke
in classGraphics2D
- Parameters:
s
- theStroke
object to be used to stroke aShape
during the rendering process
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setRenderingHint
public void setRenderingHint(RenderingHints.Key hintKey, Object hintValue)
Forwards the call to the parent.- Specified by:
setRenderingHint
in classGraphics2D
- Parameters:
hintKey
- the key of the hint to be set.hintValue
- the value indicating preferences for the specified hint category.
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getRenderingHint
public Object getRenderingHint(RenderingHints.Key hintKey)
Forwards the call to the parent.- Specified by:
getRenderingHint
in classGraphics2D
- Parameters:
hintKey
- the key corresponding to the hint to get.- Returns:
- an object representing the value for the specified hint key. Some of the keys and their associated values
are defined in the
RenderingHints
class.
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setRenderingHints
public void setRenderingHints(Map hints)
Forwards the call to the parent.- Specified by:
setRenderingHints
in classGraphics2D
- Parameters:
hints
- the rendering hints to be set
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addRenderingHints
public void addRenderingHints(Map hints)
Forwards the call to the parent.- Specified by:
addRenderingHints
in classGraphics2D
- Parameters:
hints
- the rendering hints to be set
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getRenderingHints
public RenderingHints getRenderingHints()
Forwards the call to the parent.- Specified by:
getRenderingHints
in classGraphics2D
- Returns:
- a reference to an instance of
RenderingHints
that contains the current preferences.
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translate
public void translate(int x, int y)
Forwards the call to the parent.- Specified by:
translate
in classGraphics2D
- Parameters:
x
- coords.y
- the specified coordinates- Since:
- JDK1.0
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translate
public void translate(double tx, double ty)
Concatenates the currentGraphics2D
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 anAffineTransform
represented by the following matrix:[ 1 0 tx ] [ 0 1 ty ] [ 0 0 1 ]
- Specified by:
translate
in classGraphics2D
- Parameters:
tx
- the distance to translate along the x-axisty
- the distance to translate along the y-axis
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rotate
public void rotate(double theta)
Concatenates the currentGraphics2D
Transform
with a rotation transform. Subsequent rendering is rotated by the specified radians relative to the previous origin. This is equivalent to callingtransform(R)
, where R is anAffineTransform
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.- Specified by:
rotate
in classGraphics2D
- Parameters:
theta
- the angle of rotation in radians
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rotate
public void rotate(double theta, double x, double y)
Concatenates the currentGraphics2D
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.- Specified by:
rotate
in classGraphics2D
- Parameters:
theta
- the angle of rotation in radiansx
- coords.y
- coordinates of the origin of the rotation
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scale
public void scale(double sx, double sy)
Concatenates the currentGraphics2D
Transform
with a scaling transformation Subsequent rendering is resized according to the specified scaling factors relative to the previous scaling. This is equivalent to callingtransform(S)
, where S is anAffineTransform
represented by the following matrix:[ sx 0 0 ] [ 0 sy 0 ] [ 0 0 1 ]
- Specified by:
scale
in classGraphics2D
- Parameters:
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.
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shear
public void shear(double shx, double shy)
Concatenates the currentGraphics2D
Transform
with a shearing transform. Subsequent renderings are sheared by the specified multiplier relative to the previous position. This is equivalent to callingtransform(SH)
, where SH is anAffineTransform
represented by the following matrix:[ 1 shx 0 ] [ shy 1 0 ] [ 0 0 1 ]
- Specified by:
shear
in classGraphics2D
- Parameters:
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 coordinate
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transform
public void transform(AffineTransform tx)
Composes anAffineTransform
object with theTransform
in thisGraphics2D
according to the rule last-specified-first-applied. If the currentTransform
is Cx, the result of composition with Tx is a newTransform
Cx'. Cx' becomes the currentTransform
for thisGraphics2D
. Transforming a point p by the updatedTransform
Cx' is equivalent to first transforming p by Tx and then transforming the result by the originalTransform
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.- Specified by:
transform
in classGraphics2D
- Parameters:
tx
- theAffineTransform
object to be composed with the currentTransform
- See Also:
setTransform(java.awt.geom.AffineTransform)
,AffineTransform
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setTransform
public void setTransform(AffineTransform tx)
Overwrites the Transform in theGraphics2D
context. WARNING: This method should never be used to apply a new coordinate transform on top of an existing transform because theGraphics2D
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
, orshear
methods. ThesetTransform
method is intended only for restoring the originalGraphics2D
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);
- Specified by:
setTransform
in classGraphics2D
- Parameters:
tx
- theAffineTransform
that was retrieved from thegetTransform
method- See Also:
transform(java.awt.geom.AffineTransform)
,getTransform()
,AffineTransform
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getTransform
public AffineTransform getTransform()
Returns a copy of the currentTransform
in theGraphics2D
context.- Specified by:
getTransform
in classGraphics2D
- Returns:
- the current
AffineTransform
in theGraphics2D
context. - See Also:
transform(java.awt.geom.AffineTransform)
,setTransform(java.awt.geom.AffineTransform)
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getPaint
public Paint getPaint()
Returns the currentPaint
of theGraphics2D
context.- Specified by:
getPaint
in classGraphics2D
- Returns:
- the current
Graphics2D
Paint
, which defines a color or pattern. - See Also:
setPaint(java.awt.Paint)
,Graphics.setColor(java.awt.Color)
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getComposite
public Composite getComposite()
Returns the currentComposite
in theGraphics2D
context.- Specified by:
getComposite
in classGraphics2D
- Returns:
- the current
Graphics2D
Composite
, which defines a compositing style. - See Also:
setComposite(java.awt.Composite)
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setBackground
public void setBackground(Color color)
Sets the background color for theGraphics2D
context. The background color is used for clearing a region. When aGraphics2D
is constructed for aComponent
, the background color is inherited from theComponent
. Setting the background color in theGraphics2D
context only affects the subsequentclearRect
calls and not the background color of theComponent
. To change the background of theComponent
, use appropriate methods of theComponent
.- Specified by:
setBackground
in classGraphics2D
- Parameters:
color
- the background color that isused in subsequent calls toclearRect
- See Also:
getBackground()
,Graphics.clearRect(int, int, int, int)
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getBackground
public Color getBackground()
Returns the background color used for clearing a region.- Specified by:
getBackground
in classGraphics2D
- Returns:
- the current
Graphics2D
Color
, which defines the background color. - See Also:
setBackground(java.awt.Color)
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getStroke
public Stroke getStroke()
Returns the currentStroke
in theGraphics2D
context.- Specified by:
getStroke
in classGraphics2D
- Returns:
- the current
Graphics2D
Stroke
, which defines the line style. - See Also:
setStroke(java.awt.Stroke)
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clip
public void clip(Shape s)
Intersects the currentClip
with the interior of the specifiedShape
and sets theClip
to the resulting intersection. The specifiedShape
is transformed with the currentGraphics2D
Transform
before being intersected with the currentClip
. This method is used to make the currentClip
smaller. To make theClip
larger, usesetClip
. 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 usingsetClip
with anull
argument, the specifiedShape
becomes the new user clip.- Specified by:
clip
in classGraphics2D
- Parameters:
s
- theShape
to be intersected with the currentClip
. Ifs
isnull
, this method clears the currentClip
.
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getFontRenderContext
public FontRenderContext getFontRenderContext()
Get the rendering context of theFont
within thisGraphics2D
context. TheFontRenderContext
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 asFont
andTextLayout
. 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.- Specified by:
getFontRenderContext
in classGraphics2D
- Returns:
- a reference to an instance of FontRenderContext.
- Since:
- 1.2
- See Also:
FontRenderContext
,Font.createGlyphVector(java.awt.font.FontRenderContext, java.lang.String)
,TextLayout
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create
public Graphics create()
Creates a newGraphics
object that is a copy of thisGraphics
object.
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getColor
public Color getColor()
Gets this graphics context's current color.- Specified by:
getColor
in classGraphics
- Returns:
- this graphics context's current color.
- See Also:
Color
,Graphics.setColor(Color)
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setColor
public void setColor(Color c)
Sets this graphics context's current color to the specified color. All subsequent graphics operations using this graphics context use this specified color.- Specified by:
setColor
in classGraphics
- Parameters:
c
- the new rendering color.- See Also:
Color
,Graphics.getColor()
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setPaintMode
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. All subsequent rendering operations will overwrite the destination with the current color.- Specified by:
setPaintMode
in classGraphics
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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 classGraphics
- Parameters:
c1
- the XOR alternation color
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getFont
public Font getFont()
Gets the current font.- Specified by:
getFont
in classGraphics
- Returns:
- this graphics context's current font.
- See Also:
Font
,Graphics.setFont(Font)
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setFont
public void setFont(Font font)
Sets this graphics context's font to the specified font. All subsequent text operations using this graphics context use this font.- Specified by:
setFont
in classGraphics
- Parameters:
font
- the font.- See Also:
Graphics.getFont()
,Graphics.drawString(String, int, int)
,Graphics.drawBytes(byte[], int, int, int, int)
,Graphics.drawChars(char[], int, int, int, int)
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getFontMetrics
public FontMetrics getFontMetrics(Font f)
Gets the font metrics for the specified font.- Specified by:
getFontMetrics
in classGraphics
- Parameters:
f
- the specified font- Returns:
- the font metrics for the specified font.
- See Also:
Graphics.getFont()
,FontMetrics
,Graphics.getFontMetrics()
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getClipBounds
public Rectangle getClipBounds()
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 usingsetClip(null)
, this method returnsnull
. The coordinates in the rectangle are relative to the coordinate system origin of this graphics context.- Specified by:
getClipBounds
in classGraphics
- Returns:
- the bounding rectangle of the current clipping area, or
null
if no clip is set. - Since:
- JDK1.1
- See Also:
Graphics.getClip()
,Graphics.clipRect(int, int, int, int)
,Graphics.setClip(int, int, int, int)
,Graphics.setClip(Shape)
-
clipRect
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. If there is no current clipping area, either because the clip has never been set, or the clip has been cleared usingsetClip(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.- Specified by:
clipRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to intersect the clip withy
- the y coordinate of the rectangle to intersect the clip withwidth
- the width of the rectangle to intersect the clip withheight
- the height of the rectangle to intersect the clip with- See Also:
setClip(int, int, int, int)
,setClip(Shape)
-
setClip
public void setClip(int x, int y, int width, int height)
Sets the current clip to the rectangle specified by the given coordinates. This method sets the user clip, which is independent of the clipping associated with device bounds and window visibility. Rendering operations have no effect outside of the clipping area.- Specified by:
setClip
in classGraphics
- Parameters:
x
- the x coordinate of the new clip rectangle.y
- the y coordinate of the new clip rectangle.width
- the width of the new clip rectangle.height
- the height of the new clip rectangle.- Since:
- JDK1.1
- See Also:
Graphics.clipRect(int, int, int, int)
,Graphics.setClip(Shape)
,Graphics.getClip()
-
getClip
public Shape getClip()
Gets the current clipping area. This method returns the user clip, which is independent of the clipping associated with device bounds and window visibility. If no clip has previously been set, or if the clip has been cleared usingsetClip(null)
, this method returnsnull
.- Specified by:
getClip
in classGraphics
- Returns:
- a
Shape
object representing the current clipping area, ornull
if no clip is set. - Since:
- JDK1.1
- See Also:
Graphics.getClipBounds()
,Graphics.clipRect(int, int, int, int)
,Graphics.setClip(int, int, int, int)
,Graphics.setClip(Shape)
-
setClip
public void setClip(Shape clip)
Sets the current clipping area to an arbitrary clip shape. Not all objects that implement theShape
interface can be used to set the clip. The onlyShape
objects that are guaranteed to be supported areShape
objects that are obtained via thegetClip
method and viaRectangle
objects. This method sets the user clip, which is independent of the clipping associated with device bounds and window visibility.- Specified by:
setClip
in classGraphics
- Parameters:
clip
- theShape
to use to set the clip- Since:
- JDK1.1
- See Also:
Graphics.getClip()
,Graphics.clipRect(int, int, int, int)
,Graphics.setClip(int, int, int, int)
-
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 bydx
anddy
. From the point specified byx
andy
, this method copies downwards and to the right. To copy an area of the component to the left or upwards, specify a negative value fordx
ordy
. 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'spaint
method.- Specified by:
copyArea
in classGraphics
- 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.
-
drawLine
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.
-
fillRect
public void fillRect(int x, int y, int width, int height)
Fills the specified rectangle. The left and right edges of the rectangle are atx
andx + width - 1
. The top and bottom edges are aty
andy + height - 1
. The resulting rectangle covers an areawidth
pixels wide byheight
pixels tall. The rectangle is filled using the graphics context's current color.- Specified by:
fillRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to be filled.y
- the y coordinate of the rectangle to be filled.width
- the width of the rectangle to be filled.height
- the height of the rectangle to be filled.- See Also:
Graphics.clearRect(int, int, int, int)
,Graphics.drawRect(int, int, int, int)
-
clearRect
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. This operation does not use the current paint mode. Beginning with Java 1.1, the background color of offscreen images may be system dependent. Applications should usesetColor
followed byfillRect
to ensure that an offscreen image is cleared to a specific color.- Specified by:
clearRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to clear.y
- the y coordinate of the rectangle to clear.width
- the width of the rectangle to clear.height
- the height of the rectangle to clear.- See Also:
Graphics.fillRect(int, int, int, int)
,Graphics.drawRect(int, int, int, int)
,Graphics.setColor(Color)
,Graphics.setPaintMode()
,Graphics.setXORMode(Color)
-
drawRoundRect
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. The left and right edges of the rectangle are atx
andx + width
, respectively. The top and bottom edges of the rectangle are aty
andy + height
.- Specified by:
drawRoundRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to be drawn.y
- the y coordinate of the rectangle to be drawn.width
- the width of the rectangle to be drawn.height
- the height of the rectangle to be drawn.arcWidth
- the horizontal diameter of the arc at the four corners.arcHeight
- the vertical diameter of the arc at the four corners.- See Also:
Graphics.fillRoundRect(int, int, int, int, int, int)
-
fillRoundRect
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 atx
andx + width - 1
, respectively. The top and bottom edges of the rectangle are aty
andy + height - 1
.- Specified by:
fillRoundRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to be filled.y
- the y coordinate of the rectangle to be filled.width
- the width of the rectangle to be filled.height
- the height of the rectangle to be filled.arcWidth
- the horizontal diameter of the arc at the four corners.arcHeight
- the vertical diameter of the arc at the four corners.- See Also:
Graphics.drawRoundRect(int, int, int, int, int, int)
-
drawOval
public void drawOval(int x, int y, int width, int height)
Draws the outline of an oval. The result is a circle or ellipse that fits within the rectangle specified by thex
,y
,width
, andheight
arguments. The oval covers an area that iswidth + 1
pixels wide andheight + 1
pixels tall.- Specified by:
drawOval
in classGraphics
- Parameters:
x
- the x coordinate of the upper left corner of the oval to be drawn.y
- the y coordinate of the upper left corner of the oval to be drawn.width
- the width of the oval to be drawn.height
- the height of the oval to be drawn.- See Also:
Graphics.fillOval(int, int, int, int)
-
fillOval
public void fillOval(int x, int y, int width, int height)
Fills an oval bounded by the specified rectangle with the current color.- Specified by:
fillOval
in classGraphics
- Parameters:
x
- the x coordinate of the upper left corner of the oval to be filled.y
- the y coordinate of the upper left corner of the oval to be filled.width
- the width of the oval to be filled.height
- the height of the oval to be filled.- See Also:
Graphics.drawOval(int, int, int, int)
-
drawArc
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 atstartAngle
and extends forarcAngle
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 thewidth
andheight
arguments. The resulting arc covers an areawidth + 1
pixels wide byheight + 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.- Specified by:
drawArc
in classGraphics
- Parameters:
x
- the x coordinate of the upper-left corner of the arc to be drawn.y
- the y coordinate of the upper-left corner of the arc to be drawn.width
- the width of the arc to be drawn.height
- the height of the arc to be drawn.startAngle
- the beginning angle.arcAngle
- the angular extent of the arc, relative to the start angle.- See Also:
Graphics.fillArc(int, int, int, int, int, int)
-
fillArc
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 atstartAngle
and extends forarcAngle
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 thewidth
andheight
arguments. The resulting arc covers an areawidth + 1
pixels wide byheight + 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.- Specified by:
fillArc
in classGraphics
- Parameters:
x
- the x coordinate of the upper-left corner of the arc to be filled.y
- the y coordinate of the upper-left corner of the arc to be filled.width
- the width of the arc to be filled.height
- the height of the arc to be filled.startAngle
- the beginning angle.arcAngle
- the angular extent of the arc, relative to the start angle.- See Also:
Graphics.drawArc(int, int, int, int, int, int)
-
drawPolyline
public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
Draws a sequence of connected lines defined by arrays of x and y coordinates. Each pair of (x, y) coordinates defines a point. The figure is not closed if the first point differs from the last point.- Specified by:
drawPolyline
in classGraphics
- Parameters:
xPoints
- an array of x pointsyPoints
- an array of y pointsnPoints
- the total number of points- Since:
- JDK1.1
- See Also:
Graphics.drawPolygon(int[], int[], int)
-
drawPolygon
public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
Draws a closed polygon defined by arrays of x and y coordinates. Each pair of (x, y) coordinates defines a point. This method draws the polygon defined bynPoint
line segments, where the firstnPoint - 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.- Specified by:
drawPolygon
in classGraphics
- Parameters:
xPoints
- a an array ofx
coordinates.yPoints
- a an array ofy
coordinates.nPoints
- a the total number of points.- See Also:
Graphics.fillPolygon(int[], int[], int)
,Graphics.drawPolyline(int[], int[], int)
-
fillPolygon
public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
Fills a closed polygon defined by arrays of x and y coordinates. This method draws the polygon defined bynPoint
line segments, where the firstnPoint - 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.- Specified by:
fillPolygon
in classGraphics
- Parameters:
xPoints
- a an array ofx
coordinates.yPoints
- a an array ofy
coordinates.nPoints
- a the total number of points.- See Also:
Graphics.drawPolygon(int[], int[], int)
-
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 (x, y) in this graphics context's coordinate space. Transparent pixels in the image do not affect whatever pixels are already there. This method returns immediately in all cases, even if the complete image has not yet been loaded, and it has not been dithered and converted for the current output device. If the image has not yet been completely loaded, thendrawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the specified image observer.- Specified by:
drawImage
in classGraphics
- 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.- Returns:
true
if the image is completely loaded;false
otherwise.- See Also:
Image
,ImageObserver
,ImageObserver.imageUpdate(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, thendrawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the image observer by calling itsimageUpdate
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 classGraphics
- 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.- Returns:
true
if the current output representation is complete;false
otherwise.- See Also:
Image
,ImageObserver
,ImageObserver.imageUpdate(Image, int, int, int, int, int)
-
drawImage
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. 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, thendrawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the specified image observer.- Specified by:
drawImage
in classGraphics
- Parameters:
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.- Returns:
true
if the image is completely loaded;false
otherwise.- See Also:
Image
,ImageObserver
,ImageObserver.imageUpdate(Image, int, int, int, int, int)
-
drawImage
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. 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 thendrawImage
returnsfalse
. 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.- Specified by:
drawImage
in classGraphics
- 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.bgcolor
- the background color to paint under the non-opaque portions of the image.observer
- object to be notified as more of the image is converted.- Returns:
true
if the current output representation is complete;false
otherwise.- See Also:
Image
,ImageObserver
,ImageObserver.imageUpdate(Image, int, int, int, int, int)
-
drawImage
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. 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 thendrawImage
returnsfalse
. 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.- Specified by:
drawImage
in classGraphics
- Parameters:
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.- Returns:
true
if the current output representation is complete;false
otherwise.- Since:
- JDK1.1
- See Also:
Image
,ImageObserver
,ImageObserver.imageUpdate(Image, int, int, int, int, int)
-
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)
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 thendrawImage
returnsfalse
. 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.- Specified by:
drawImage
in classGraphics
- Parameters:
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.- Returns:
true
if the current output representation is complete;false
otherwise.- Since:
- JDK1.1
- See Also:
Image
,ImageObserver
,ImageObserver.imageUpdate(Image, int, int, int, int, int)
-
dispose
public void dispose()
Disposes of this graphics context and releases any system resources that it is using. AGraphics
object cannot be used afterdispose
has been called. When a Java program runs, a large number ofGraphics
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 thepaint
andupdate
methods of components are automatically released by the system when those methods return. For efficiency, programmers should calldispose
when finished using aGraphics
object only if it was created directly from a component or anotherGraphics
object.- Specified by:
dispose
in classGraphics
- See Also:
Graphics.finalize()
,Component.paint(java.awt.Graphics)
,Component.update(java.awt.Graphics)
,Component.getGraphics()
,Graphics.create()
-
drawRect
public void drawRect(int x, int y, int width, int height)
Draws the outline of the specified rectangle. The left and right edges of the rectangle are atx
andx + width
. The top and bottom edges are aty
andy + height
. The rectangle is drawn using the graphics context's current color.- Overrides:
drawRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to be drawn.y
- the y coordinate of the rectangle to be drawn.width
- the width of the rectangle to be drawn.height
- the height of the rectangle to be drawn.- See Also:
Graphics.fillRect(int, int, int, int)
,Graphics.clearRect(int, int, int, int)
-
drawPolygon
public void drawPolygon(Polygon p)
Draws the outline of a polygon defined by the specifiedPolygon
object.- Overrides:
drawPolygon
in classGraphics
- Parameters:
p
- the polygon to draw.- See Also:
Graphics.fillPolygon(int[], int[], int)
,Graphics.drawPolyline(int[], int[], int)
-
fillPolygon
public void fillPolygon(Polygon p)
Fills the polygon defined by the specified Polygon object with the graphics context's current color. The area inside the polygon is defined using an even-odd fill rule, also known as the alternating rule.- Overrides:
fillPolygon
in classGraphics
- Parameters:
p
- the polygon to fill.- See Also:
Graphics.drawPolygon(int[], int[], int)
-
-