Class DebugGraphics

java.lang.Object
java.awt.Graphics
javax.swing.DebugGraphics
public class DebugGraphics extends Graphics
Graphics subclass supporting graphics debugging. Overrides most methods from Graphics. DebugGraphics objects are rarely created by hand. They are most frequently created automatically when a JComponent's debugGraphicsOptions are changed using the setDebugGraphicsOptions() method.

NOTE: You must turn off double buffering to use DebugGraphics: RepaintManager repaintManager = RepaintManager.currentManager(component); repaintManager.setDoubleBufferingEnabled(false);

Since:
1.2
See Also:

Field Summary

Modifier and Type Field Description
static final int BUFFERED_OPTION
Show buffered operations in a separate Frame.
static final int FLASH_OPTION
Flash graphics operations.
static final int LOG_OPTION
Log graphics operations.
static final int NONE_OPTION
Don't debug graphics operations.

Constructor Summary

Constructor Description
DebugGraphics()
Constructs a new debug graphics context that supports slowed down drawing.
DebugGraphics(Graphics graphics)
Constructs a debug graphics context from an existing graphics context that supports slowed down drawing.
DebugGraphics(Graphics graphics, JComponent component)
Constructs a debug graphics context from an existing graphics context that slows down drawing for the specified component.

Method Summary

Modifier and Type Method Description
void clearRect(int x, int y, int width, int height)
Overrides Graphics.clearRect.
void clipRect(int x, int y, int width, int height)
Overrides Graphics.clipRect.
void copyArea(int x, int y, int width, int height, int destX, int destY)
Overrides Graphics.copyArea.
Graphics create()
Overrides Graphics.create to return a DebugGraphics object.
Graphics create(int x, int y, int width, int height)
Overrides Graphics.create to return a DebugGraphics object.
void dispose()
Overrides Graphics.dispose.
void draw3DRect(int x, int y, int width, int height, boolean raised)
Overrides Graphics.draw3DRect.
void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle)
Overrides Graphics.drawArc.
void drawBytes(byte[] data, int offset, int length, int x, int y)
Overrides Graphics.drawBytes.
void drawChars(char[] data, int offset, int length, int x, int y)
Overrides Graphics.drawChars.
boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver observer)
Overrides Graphics.drawImage.
boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer)
Overrides Graphics.drawImage.
boolean drawImage(Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer)
Overrides Graphics.drawImage.
boolean drawImage(Image img, int x, int y, int width, int height, ImageObserver observer)
Overrides Graphics.drawImage.
boolean drawImage(Image img, int x, int y, Color bgcolor, ImageObserver observer)
Overrides Graphics.drawImage.
boolean drawImage(Image img, int x, int y, ImageObserver observer)
Overrides Graphics.drawImage.
void drawLine(int x1, int y1, int x2, int y2)
Overrides Graphics.drawLine.
void drawOval(int x, int y, int width, int height)
Overrides Graphics.drawOval.
void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
Overrides Graphics.drawPolygon.
void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
Overrides Graphics.drawPolyline.
void drawRect(int x, int y, int width, int height)
Overrides Graphics.drawRect.
void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)
Overrides Graphics.drawRoundRect.
void drawString(String aString, int x, int y)
Overrides Graphics.drawString.
void drawString(AttributedCharacterIterator iterator, int x, int y)
Overrides Graphics.drawString.
void fill3DRect(int x, int y, int width, int height, boolean raised)
Overrides Graphics.fill3DRect.
void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle)
Overrides Graphics.fillArc.
void fillOval(int x, int y, int width, int height)
Overrides Graphics.fillOval.
void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
Overrides Graphics.fillPolygon.
void fillRect(int x, int y, int width, int height)
Overrides Graphics.fillRect.
void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)
Overrides Graphics.fillRoundRect.
static Color flashColor()
Returns the Color used to flash drawing operations.
static int flashCount()
Returns the number of times that drawing operations will flash.
static int flashTime()
Returns the time delay of drawing operation flashing.
Shape getClip()
Overrides Graphics.getClip.
Rectangle getClipBounds()
Overrides Graphics.getClipBounds.
Color getColor()
Returns the Color used for text drawing operations.
int getDebugOptions()
Returns the current debugging options for this DebugGraphics.
Font getFont()
Returns the Font used for text drawing operations.
FontMetrics getFontMetrics()
Overrides Graphics.getFontMetrics.
FontMetrics getFontMetrics(Font f)
Overrides Graphics.getFontMetrics.
boolean isDrawingBuffer()
Returns the drawingBuffer value.
static PrintStream logStream()
Returns the stream to which the DebugGraphics logs drawing operations.
void setClip(int x, int y, int width, int height)
Overrides Graphics.setClip.
void setClip(Shape clip)
Overrides Graphics.setClip.
void setColor(Color aColor)
Sets the color to be used for drawing and filling lines and shapes.
void setDebugOptions(int options)
Enables/disables diagnostic information about every graphics operation.
static void setFlashColor(Color flashColor)
Sets the Color used to flash drawing operations.
static void setFlashCount(int flashCount)
Sets the number of times that drawing operations will flash.
static void setFlashTime(int flashTime)
Sets the time delay of drawing operation flashing.
void setFont(Font aFont)
Sets the Font used for text drawing operations.
static void setLogStream(PrintStream stream)
Sets the stream to which the DebugGraphics logs drawing operations.
void setPaintMode()
Overrides Graphics.setPaintMode.
void setXORMode(Color aColor)
Overrides Graphics.setXORMode.
void translate(int x, int y)
Overrides Graphics.translate.

Methods declared in class java.awt.Graphics

drawPolygon, fillPolygon, finalize, getClipBounds, getClipRect, hitClip, toString

Methods declared in class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

LOG_OPTION

public static final int LOG_OPTION
Log graphics operations.
See Also:

FLASH_OPTION

public static final int FLASH_OPTION
Flash graphics operations.
See Also:

BUFFERED_OPTION

public static final int BUFFERED_OPTION
Show buffered operations in a separate Frame.
See Also:

NONE_OPTION

public static final int NONE_OPTION
Don't debug graphics operations.
See Also:

Constructor Details

DebugGraphics

public DebugGraphics()
Constructs a new debug graphics context that supports slowed down drawing.

DebugGraphics

public DebugGraphics(Graphics graphics, JComponent component)
Constructs a debug graphics context from an existing graphics context that slows down drawing for the specified component.
Parameters:
graphics - the Graphics context to slow down
component - the JComponent to draw slowly

DebugGraphics

public DebugGraphics(Graphics graphics)
Constructs a debug graphics context from an existing graphics context that supports slowed down drawing.
Parameters:
graphics - the Graphics context to slow down

Method Details

create

public Graphics create()
Overrides Graphics.create to return a DebugGraphics object.
Specified by:
create in class Graphics
Returns:
a new graphics context that is a copy of this graphics context.

create

public Graphics create(int x, int y, int width, int height)
Overrides Graphics.create to return a DebugGraphics object.
Overrides:
create in class Graphics
Parameters:
x - the x coordinate.
y - the y coordinate.
width - the width of the clipping rectangle.
height - the height of the clipping rectangle.
Returns:
a new graphics context.
See Also:

setFlashColor

public static void setFlashColor(Color flashColor)
Sets the Color used to flash drawing operations.
Parameters:
flashColor - the Color used to flash drawing operations

flashColor

public static Color flashColor()
Returns the Color used to flash drawing operations.
Returns:
the Color used to flash drawing operations
See Also:

setFlashTime

public static void setFlashTime(int flashTime)
Sets the time delay of drawing operation flashing.
Parameters:
flashTime - the time delay of drawing operation flashing

flashTime

public static int flashTime()
Returns the time delay of drawing operation flashing.
Returns:
the time delay of drawing operation flashing
See Also:

setFlashCount

public static void setFlashCount(int flashCount)
Sets the number of times that drawing operations will flash.
Parameters:
flashCount - number of times that drawing operations will flash

flashCount

public static int flashCount()
Returns the number of times that drawing operations will flash.
Returns:
the number of times that drawing operations will flash
See Also:

setLogStream

public static void setLogStream(PrintStream stream)
Sets the stream to which the DebugGraphics logs drawing operations.
Parameters:
stream - the stream to which the DebugGraphics logs drawing operations

logStream

public static PrintStream logStream()
Returns the stream to which the DebugGraphics logs drawing operations.
Returns:
the stream to which the DebugGraphics logs drawing operations
See Also:

setFont

public void setFont(Font aFont)
Sets the Font used for text drawing operations.
Specified by:
setFont in class Graphics
Parameters:
aFont - the font.
See Also:

getFont

public Font getFont()
Returns the Font used for text drawing operations.
Specified by:
getFont in class Graphics
Returns:
this graphics context's current font.
See Also:

setColor

public void setColor(Color aColor)
Sets the color to be used for drawing and filling lines and shapes.
Specified by:
setColor in class Graphics
Parameters:
aColor - the new rendering color.
See Also:

getColor

public Color getColor()
Returns the Color used for text drawing operations.
Specified by:
getColor in class Graphics
Returns:
this graphics context's current color.
See Also:

getFontMetrics

public FontMetrics getFontMetrics()
Overrides Graphics.getFontMetrics.
Overrides:
getFontMetrics in class Graphics
Returns:
the font metrics of this graphics context's current font.
See Also:

getFontMetrics

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

translate

public void translate(int x, int y)
Overrides Graphics.translate.
Specified by:
translate in class Graphics
Parameters:
x - the x coordinate.
y - the y coordinate.

setPaintMode

public void setPaintMode()
Overrides Graphics.setPaintMode.
Specified by:
setPaintMode in class Graphics

setXORMode

public void setXORMode(Color aColor)
Overrides Graphics.setXORMode.
Specified by:
setXORMode in class Graphics
Parameters:
aColor - the XOR alternation color

getClipBounds

public Rectangle getClipBounds()
Overrides Graphics.getClipBounds.
Specified by:
getClipBounds in class Graphics
Returns:
the bounding rectangle of the current clipping area, or null if no clip is set.
See Also:

clipRect

public void clipRect(int x, int y, int width, int height)
Overrides Graphics.clipRect.
Specified by:
clipRect in class Graphics
Parameters:
x - the x coordinate of the rectangle to intersect the clip with
y - the y coordinate of the rectangle to intersect the clip with
width - the width of the rectangle to intersect the clip with
height - the height of the rectangle to intersect the clip with
See Also:

setClip

public void setClip(int x, int y, int width, int height)
Overrides Graphics.setClip.
Specified by:
setClip in class Graphics
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.
See Also:

getClip

public Shape getClip()
Overrides Graphics.getClip.
Specified by:
getClip in class Graphics
Returns:
a Shape object representing the current clipping area, or null if no clip is set.
See Also:

setClip

public void setClip(Shape clip)
Overrides Graphics.setClip.
Specified by:
setClip in class Graphics
Parameters:
clip - the Shape to use to set the clip. Passing null clears the current clip.
See Also:

drawRect

public void drawRect(int x, int y, int width, int height)
Overrides Graphics.drawRect.
Overrides:
drawRect in class Graphics
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:

fillRect

public void fillRect(int x, int y, int width, int height)
Overrides Graphics.fillRect.
Specified by:
fillRect in class Graphics
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:

clearRect

public void clearRect(int x, int y, int width, int height)
Overrides Graphics.clearRect.
Specified by:
clearRect in class Graphics
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:

drawRoundRect

public void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)
Overrides Graphics.drawRoundRect.
Specified by:
drawRoundRect in class Graphics
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:

fillRoundRect

public void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)
Overrides Graphics.fillRoundRect.
Specified by:
fillRoundRect in class Graphics
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:

drawLine

public void drawLine(int x1, int y1, int x2, int y2)
Overrides Graphics.drawLine.
Specified by:
drawLine in class Graphics
Parameters:
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.

draw3DRect

public void draw3DRect(int x, int y, int width, int height, boolean raised)
Overrides Graphics.draw3DRect.
Overrides:
draw3DRect in class Graphics
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.
raised - a boolean that determines whether the rectangle appears to be raised above the surface or sunk into the surface.
See Also:

fill3DRect

public void fill3DRect(int x, int y, int width, int height, boolean raised)
Overrides Graphics.fill3DRect.
Overrides:
fill3DRect in class Graphics
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.
raised - a boolean value that determines whether the rectangle appears to be raised above the surface or etched into the surface.
See Also:

drawOval

public void drawOval(int x, int y, int width, int height)
Overrides Graphics.drawOval.
Specified by:
drawOval in class Graphics
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:

fillOval

public void fillOval(int x, int y, int width, int height)
Overrides Graphics.fillOval.
Specified by:
fillOval in class Graphics
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:

drawArc

public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle)
Overrides Graphics.drawArc.
Specified by:
drawArc in class Graphics
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:

fillArc

public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle)
Overrides Graphics.fillArc.
Specified by:
fillArc in class Graphics
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:

drawPolyline

public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
Overrides Graphics.drawPolyline.
Specified by:
drawPolyline in class Graphics
Parameters:
xPoints - an array of x points
yPoints - an array of y points
nPoints - the total number of points
See Also:

drawPolygon

public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
Overrides Graphics.drawPolygon.
Specified by:
drawPolygon in class Graphics
Parameters:
xPoints - a an array of x coordinates.
yPoints - a an array of y coordinates.
nPoints - a the total number of points.
See Also:

fillPolygon

public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
Overrides Graphics.fillPolygon.
Specified by:
fillPolygon in class Graphics
Parameters:
xPoints - a an array of x coordinates.
yPoints - a an array of y coordinates.
nPoints - a the total number of points.
See Also:

drawString

public void drawString(String aString, int x, int y)
Overrides Graphics.drawString.
Specified by:
drawString in class Graphics
Parameters:
aString - the string to be drawn.
x - the x coordinate.
y - the y coordinate.
See Also:

drawString

public void drawString(AttributedCharacterIterator iterator, int x, int y)
Overrides Graphics.drawString.
Specified by:
drawString in class Graphics
Parameters:
iterator - the iterator whose text is to be drawn
x - the x coordinate.
y - the y coordinate.
See Also:

drawBytes

public void drawBytes(byte[] data, int offset, int length, int x, int y)
Overrides Graphics.drawBytes.
Overrides:
drawBytes in class Graphics
Parameters:
data - the data to be drawn
offset - the start offset in the data
length - the number of bytes that are drawn
x - the x coordinate of the baseline of the text
y - the y coordinate of the baseline of the text
See Also:

drawChars

public void drawChars(char[] data, int offset, int length, int x, int y)
Overrides Graphics.drawChars.
Overrides:
drawChars in class Graphics
Parameters:
data - the array of characters to be drawn
offset - the start offset in the data
length - the number of characters to be drawn
x - the x coordinate of the baseline of the text
y - the y coordinate of the baseline of the text
See Also:

drawImage

public boolean drawImage(Image img, int x, int y, ImageObserver observer)
Overrides Graphics.drawImage.
Specified by:
drawImage in class Graphics
Parameters:
img - the specified image to be drawn. This method does nothing if img is null.
x - the x coordinate.
y - the y coordinate.
observer - object to be notified as more of the image is converted.
Returns:
false if the image pixels are still changing; true otherwise.
See Also:

drawImage

public boolean drawImage(Image img, int x, int y, int width, int height, ImageObserver observer)
Overrides Graphics.drawImage.
Specified by:
drawImage in class Graphics
Parameters:
img - the specified image to be drawn. This method does nothing if img is null.
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:
false if the image pixels are still changing; true otherwise.
See Also:

drawImage

public boolean drawImage(Image img, int x, int y, Color bgcolor, ImageObserver observer)
Overrides Graphics.drawImage.
Specified by:
drawImage in class Graphics
Parameters:
img - the specified image to be drawn. This method does nothing if img is null.
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:
false if the image pixels are still changing; true otherwise.
See Also:

drawImage

public boolean drawImage(Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer)
Overrides Graphics.drawImage.
Specified by:
drawImage in class Graphics
Parameters:
img - the specified image to be drawn. This method does nothing if img is null.
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:
false if the image pixels are still changing; true otherwise.
See Also:

drawImage

public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer)
Overrides Graphics.drawImage.
Specified by:
drawImage in class Graphics
Parameters:
img - the specified image to be drawn. This method does nothing if img is null.
dx1 - 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:
false if the image pixels are still changing; true otherwise.
See Also:

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)
Overrides Graphics.drawImage.
Specified by:
drawImage in class Graphics
Parameters:
img - the specified image to be drawn. This method does nothing if img is null.
dx1 - 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:
false if the image pixels are still changing; true otherwise.
See Also:

copyArea

public void copyArea(int x, int y, int width, int height, int destX, int destY)
Overrides Graphics.copyArea.
Specified by:
copyArea in class Graphics
Parameters:
x - the x coordinate of the source rectangle.
y - the y coordinate of the source rectangle.
width - the width of the source rectangle.
height - the height of the source rectangle.
destX - the horizontal distance to copy the pixels.
destY - the vertical distance to copy the pixels.

dispose

public void dispose()
Overrides Graphics.dispose.
Specified by:
dispose in class Graphics
See Also:

isDrawingBuffer

public boolean isDrawingBuffer()
Returns the drawingBuffer value.
Returns:
true if this object is drawing from a Buffer

setDebugOptions

public void setDebugOptions(int options)
Enables/disables diagnostic information about every graphics operation. The value of options indicates how this information should be displayed. LOG_OPTION causes a text message to be printed. FLASH_OPTION causes the drawing to flash several times. BUFFERED_OPTION creates a new Frame that shows each operation on an offscreen buffer. The value of options is bitwise OR'd into the current value. To disable debugging use NONE_OPTION.
Parameters:
options - indicates how diagnostic information should be displayed

getDebugOptions

public int getDebugOptions()
Returns the current debugging options for this DebugGraphics.
Returns:
the current debugging options for this DebugGraphics
See Also:

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https://docs.oracle.com/en/java/javase/17/docs/api/java.desktop/javax/swing/DebugGraphics.html