SwingGraphics

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javax.swing
Class SwingGraphics

java.lang.Object
  java.awt.Graphics
      javax.swing.SwingGraphics

All Implemented Interfaces:: GraphicsWrapper

class SwingGraphics
extends Graphics
implements GraphicsWrapper

Field Summary
`(package private) Rectangle`	`clipRect`
`(package private) Color`	`currentColor`
`(package private) Font`	`currentFont`
`(package private) Color`	`currentXORMode`
`private static boolean`	`DEBUG`
`(package private) Graphics`	`graphics`
`(package private) Graphics`	`originalGraphics`
`private static Stack`	`pool`
`(package private) SwingGraphics`	`previous`
`private static boolean`	`TRACE`
`(package private) int`	`translateX`
`(package private) int`	`translateY`
`private static boolean`	`VERBOSE`

Constructor Summary
`(package private)`	`SwingGraphics(Graphics g)`

Method Summary
`private void`	`_changeClip(int x, int y, int w, int h, boolean set)`
`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`	`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`.
`Graphics`	`create()` Creates a new `Graphics` object that is a copy of this `Graphics` object.
`Graphics`	`create(int x, int y, int w, int h)` Creates a new `Graphics` object based on this `Graphics` object, but with a new translation and clip area.
`static Graphics`	`createSwingGraphics(Graphics g)`
`(package private) static Graphics`	`createSwingGraphics(Graphics g, int x, int y, int width, int height)` Create a SwingGraphics from another Graphics object, and set its clip to be the intersection of the first Graphics object's clip rect.
`void`	`dispose()` Disposes of this graphics context and releases any system resources that it is using.
`void`	`draw3DRect(int x, int y, int width, int height, boolean raised)` Draws a 3-D highlighted outline of the specified rectangle.
`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`	`drawBytes(byte[] data, int offset, int length, int x, int y)` Draws the text given by the specified byte array, using this graphics context's current font and color.
`void`	`drawChars(char[] data, int offset, int length, int x, int y)` Draws the text given by the specified character array, using this graphics context's current font and color.
`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, 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 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.
`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 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`	`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(AttributedCharacterIterator iterator, int x, int y)` Draws the text given by the specified iterator, using this graphics context's current color.
`void`	`drawString(String str, int x, int y)` Draws the text given by the specified string, using this graphics context's current font and color.
`void`	`fill3DRect(int x, int y, int width, int height, boolean raised)` Paints a 3-D highlighted rectangle filled with the current color.
`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.
`void`	`finalize()` Disposes of this graphics context once it is no longer referenced.
`Shape`	`getClip()` Gets the current clipping area.
`Rectangle`	`getClipBounds()` Returns the bounding rectangle of the current clipping area.
`int`	`getClipHeight()`
`Rectangle`	`getClipRect()` Returns the bounding rectangle of the current clipping area.
`int`	`getClipWidth()`
`int`	`getClipX()`
`int`	`getClipY()`
`Color`	`getColor()` Gets this graphics context's current color.
`Font`	`getFont()` Gets the current font.
`FontMetrics`	`getFontMetrics()` Gets the font metrics of the current font.
`FontMetrics`	`getFontMetrics(Font f)` Gets the font metrics for the specified font.
`private static SwingGraphics`	`getRecycledSwingGraphics()`
`(package private) void`	`init(Graphics g)`
`boolean`	`isClipIntersecting(Rectangle r)`
`private static void`	`recycleSwingGraphics(SwingGraphics g)`
`private void`	`resetGraphics()`
`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`	`setFont(Font font)` Sets this graphics context's font to the specified font.
`void`	`setPaintMode()` Sets the paint mode of this graphics context to overwrite the destination with this graphics context's current color.
`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.
`Graphics`	`subGraphics()`
`String`	`toString()` Returns a `String` object representing this `Graphics` object's value.
`void`	`translate(int x, int y)` Translates the origin of the graphics context to the point (x, y) in the current coordinate system.

Methods inherited from class java.awt.Graphics

getClipBounds, hitClip

Methods inherited from class java.lang.Object

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

Field Detail

graphics

Graphics graphics

originalGraphics

Graphics originalGraphics

clipRect

Rectangle clipRect

currentColor

Color currentColor

currentFont

Font currentFont

currentXORMode

Color currentXORMode

translateX

int translateX

translateY

int translateY

SwingGraphics previous

TRACE

private static final boolean TRACE

See Also:: Constant Field Values

VERBOSE

private static final boolean VERBOSE

See Also:: Constant Field Values

DEBUG

private static final boolean DEBUG

See Also:: Constant Field Values

pool

private static Stack pool

Constructor Detail

SwingGraphics

SwingGraphics(Graphics g)

Method Detail

create

public Graphics create()

Description copied from class: Graphics

Creates a new Graphics object that is a copy of this Graphics object.

Specified by:: create in class Graphics

Returns:: a new graphics context that is a copy of this graphics context.

create

public Graphics create(int x,
                       int y,
                       int w,
                       int h)

Description copied from class: Graphics

Creates a new Graphics object based on this Graphics object, but with a new translation and clip area. The new Graphics object has its origin translated to the specified point (x, y). Its clip area is determined by the intersection of the original clip area with the specified rectangle. The arguments are all interpreted in the coordinate system of the original Graphics object. The new graphics context is identical to the original, except in two respects:

The new graphics context is translated by (x, y). That is to say, the point (0, 0) in the new graphics context is the same as (x, y) in the original graphics context.
The new graphics context has an additional clipping rectangle, in addition to whatever (translated) clipping rectangle it inherited from the original graphics context. The origin of the new clipping rectangle is at (0, 0), and its size is specified by the width and height arguments.

Overrides:: create in class Graphics

Parameters:: x - the x coordinate.; y - the y coordinate.; w - the width of the clipping rectangle.; h - the height of the clipping rectangle.
Returns:: a new graphics context.
See Also:: Graphics.translate(int, int), Graphics.clipRect(int, int, int, int)

subGraphics

public Graphics subGraphics()

Specified by:: subGraphics in interface GraphicsWrapper

init

void init(Graphics g)

createSwingGraphics

public static Graphics createSwingGraphics(Graphics g)

createSwingGraphics

static Graphics createSwingGraphics(Graphics g,
                                    int x,
                                    int y,
                                    int width,
                                    int height)

Create a SwingGraphics from another Graphics object, and set its clip to be the intersection of the first Graphics object's clip rect. Graphics.create() normally does this, but Microsoft's SDK for Java 2.0 doesn't set the clip of the returned object. Since this method is supposed to emulate what Graphics.create() does, all potential bugs should be first checked with that method before changing the behavior here.

translate

public void translate(int x,
                      int y)

Description copied from class: Graphics

Translates the origin of the graphics context to the point (x, y) in the current coordinate system. Modifies this graphics context so that its new origin corresponds to the point (x, y) in this graphics context's original coordinate system. All coordinates used in subsequent rendering operations on this graphics context will be relative to this new origin.

Specified by:: translate in class Graphics

Parameters:: x - the x coordinate.; y - the y coordinate.

getColor

public Color getColor()

Description copied from class: Graphics

Gets this graphics context's current color.

Specified by:: getColor in class Graphics

Returns:: this graphics context's current color.
See Also:: Color, Graphics.setColor(Color)

setColor

public void setColor(Color c)

Description copied from class: Graphics

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 class Graphics

Parameters:: c - the new rendering color.
See Also:: Color, Graphics.getColor()

setPaintMode

public void setPaintMode()

Description copied from class: Graphics

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 class Graphics

setXORMode

public void setXORMode(Color c1)

Description copied from class: Graphics

Sets the paint mode of this graphics context to alternate between this graphics context's current color and the new specified color. This specifies that logical pixel operations are performed in the XOR mode, which alternates pixels between the current color and a specified XOR color.

When drawing operations are performed, pixels which are the current color are changed to the specified color, and vice versa.

Pixels that are of colors other than those two colors are changed in an unpredictable but reversible manner; if the same figure is drawn twice, then all pixels are restored to their original values.

Specified by:: setXORMode in class Graphics

Parameters:: c1 - the XOR alternation color

getFont

public Font getFont()

Description copied from class: Graphics

Gets the current font.

Specified by:: getFont in class Graphics

Returns:: this graphics context's current font.
See Also:: Font, Graphics.setFont(Font)

setFont

public void setFont(Font font)

Description copied from class: Graphics

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 class Graphics

Parameters:: font - the font.
See Also:: Graphics.getFont(), Graphics.drawString(java.lang.String, int, int), Graphics.drawBytes(byte[], int, int, int, int), Graphics.drawChars(char[], int, int, int, int)

getFontMetrics

public FontMetrics getFontMetrics()

Description copied from class: Graphics

Gets the font metrics of the current font.

Overrides:: getFontMetrics in class Graphics

Returns:: the font metrics of this graphics context's current font.
See Also:: Graphics.getFont(), FontMetrics, Graphics.getFontMetrics(Font)

getFontMetrics

public FontMetrics getFontMetrics(Font f)

Description copied from class: Graphics

Gets the font metrics for the specified font.

Specified by:: getFontMetrics in class Graphics

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

getClipBounds

public Rectangle getClipBounds()

Description copied from class: Graphics

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 using setClip(null), this method returns null. The coordinates in the rectangle are relative to the coordinate system origin of this graphics context.

Specified by:: getClipBounds in class Graphics

Returns:: the bounding rectangle of the current clipping area, or null if no clip is set.
See Also:: Graphics.getClip(), Graphics.clipRect(int, int, int, int), Graphics.setClip(int, int, int, int), Graphics.setClip(Shape)

isClipIntersecting

public boolean isClipIntersecting(Rectangle r)

Specified by:: isClipIntersecting in interface GraphicsWrapper

getClipX

public int getClipX()

Specified by:: getClipX in interface GraphicsWrapper

getClipY

public int getClipY()

Specified by:: getClipY in interface GraphicsWrapper

getClipWidth

public int getClipWidth()

Specified by:: getClipWidth in interface GraphicsWrapper

getClipHeight

public int getClipHeight()

Specified by:: getClipHeight in interface GraphicsWrapper

clipRect

public void clipRect(int x,
                     int y,
                     int width,
                     int height)

Description copied from class: Graphics

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 using 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.

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:: Graphics.setClip(int, int, int, int), Graphics.setClip(Shape)

setClip

public void setClip(int x,
                    int y,
                    int width,
                    int height)

Description copied from class: Graphics

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 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:: Graphics.clipRect(int, int, int, int), Graphics.setClip(Shape), Graphics.getClip()

getClip

public Shape getClip()

Description copied from class: Graphics

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 using setClip(null), this method returns null.

Specified by:: getClip in class Graphics

Returns:: a Shape object representing the current clipping area, or null if no clip is set.
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)

Description copied from class: Graphics

Sets the current clipping area to an arbitrary clip shape. Not all objects that implement the 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.

Specified by:: setClip in class Graphics

Parameters:: clip - the Shape to use to set the clip
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)

Description copied from class: Graphics

Copies an area of the component by a distance specified by dx and dy. From the point specified by x and y, this method copies downwards and to the right. To copy an area of the component to the left or upwards, specify a negative value for dx or dy. If a portion of the source rectangle lies outside the bounds of the component, or is obscured by another window or component, copyArea will be unable to copy the associated pixels. The area that is omitted can be refreshed by calling the component's paint method.

Specified by:: copyArea in class Graphics

Parameters:: x - the x coordinate of the source rectangle.; y - the y coordinate of the source rectangle.; width - the width of the source rectangle.; height - the height of the source rectangle.; dx - the horizontal distance to copy the pixels.; dy - the vertical distance to copy the pixels.

drawLine

public void drawLine(int x1,
                     int y1,
                     int x2,
                     int y2)

Description copied from class: Graphics

Draws a line, using the current color, between the points (x1, y1) and (x2, y2) in this graphics context's coordinate system.

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.

fillRect

public void fillRect(int x,
                     int y,
                     int width,
                     int height)

Description copied from class: Graphics

Fills the specified rectangle. The left and right edges of the rectangle are at 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.

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:: Graphics.clearRect(int, int, int, int), Graphics.drawRect(int, int, int, int)

drawRect

public void drawRect(int x,
                     int y,
                     int width,
                     int height)

Description copied from class: Graphics

Draws the outline of the specified rectangle. The left and right edges of the rectangle are at 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.

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:: Graphics.fillRect(int, int, int, int), Graphics.clearRect(int, int, int, int)

clearRect

public void clearRect(int x,
                      int y,
                      int width,
                      int height)

Description copied from class: Graphics

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 use setColor followed by fillRect to ensure that an offscreen image is cleared to a specific color.

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:: Graphics.fillRect(int, int, int, int), Graphics.drawRect(int, int, int, int), Graphics.setColor(java.awt.Color), Graphics.setPaintMode(), Graphics.setXORMode(java.awt.Color)

drawRoundRect

public void drawRoundRect(int x,
                          int y,
                          int width,
                          int height,
                          int arcWidth,
                          int arcHeight)

Description copied from class: Graphics

Draws an outlined round-cornered rectangle using this graphics context's current color. The left and right edges of the rectangle are at x and x + width, respectively. The top and bottom edges of the rectangle are at y and y + height.

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:: Graphics.fillRoundRect(int, int, int, int, int, int)

fillRoundRect

public void fillRoundRect(int x,
                          int y,
                          int width,
                          int height,
                          int arcWidth,
                          int arcHeight)

Description copied from class: Graphics

Fills the specified rounded corner rectangle with the current color. The left and right edges of the rectangle are at x and x + width - 1, respectively. The top and bottom edges of the rectangle are at y and y + height - 1.

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:: Graphics.drawRoundRect(int, int, int, int, int, int)

draw3DRect

public void draw3DRect(int x,
                       int y,
                       int width,
                       int height,
                       boolean raised)

Description copied from class: Graphics

Draws a 3-D highlighted outline of the specified rectangle. The edges of the rectangle are highlighted so that they appear to be beveled and lit from the upper left corner.

The colors used for the highlighting effect are determined based on the current color. The resulting rectangle covers an area that is width + 1 pixels wide by height + 1 pixels tall.

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:: Graphics.fill3DRect(int, int, int, int, boolean)

fill3DRect

public void fill3DRect(int x,
                       int y,
                       int width,
                       int height,
                       boolean raised)

Description copied from class: Graphics

Paints a 3-D highlighted rectangle filled with the current color. The edges of the rectangle will be highlighted so that it appears as if the edges were beveled and lit from the upper left corner. The colors used for the highlighting effect will be determined from the current color.

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:: Graphics.draw3DRect(int, int, int, int, boolean)

drawOval

public void drawOval(int x,
                     int y,
                     int width,
                     int height)

Description copied from class: Graphics

Draws the outline of an oval. The result is a circle or ellipse that fits within the rectangle specified by the x, y, width, and height arguments.

The oval covers an area that is width + 1 pixels wide and height + 1 pixels tall.

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:: Graphics.fillOval(int, int, int, int)

fillOval

public void fillOval(int x,
                     int y,
                     int width,
                     int height)

Description copied from class: Graphics

Fills an oval bounded by the specified rectangle with the current color.

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:: Graphics.drawOval(int, int, int, int)

drawArc

public void drawArc(int x,
                    int y,
                    int width,
                    int height,
                    int startAngle,
                    int arcAngle)

Description copied from class: Graphics

Draws the outline of a circular or elliptical arc covering the specified rectangle.

The resulting arc begins at 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.

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:: Graphics.fillArc(int, int, int, int, int, int)

fillArc

public void fillArc(int x,
                    int y,
                    int width,
                    int height,
                    int startAngle,
                    int arcAngle)

Description copied from class: Graphics

Fills a circular or elliptical arc covering the specified rectangle.

The resulting arc begins at 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.

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:: Graphics.drawArc(int, int, int, int, int, int)

drawPolyline

public void drawPolyline(int[] xPoints,
                         int[] yPoints,
                         int nPoints)

Description copied from class: Graphics

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 class Graphics

Parameters:: xPoints - an array of x points; yPoints - an array of y points; nPoints - the total number of points
See Also:: Graphics.drawPolygon(int[], int[], int)

drawPolygon

public void drawPolygon(int[] xPoints,
                        int[] yPoints,
                        int nPoints)

Description copied from class: Graphics

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 by 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.

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:: Graphics.fillPolygon(int[], int[], int), Graphics.drawPolyline(int[], int[], int)

drawPolygon

public void drawPolygon(Polygon p)

Description copied from class: Graphics

Draws the outline of a polygon defined by the specified Polygon object.

Overrides:: drawPolygon in class Graphics

Parameters:: p - the polygon to draw.
See Also:: Graphics.fillPolygon(int[], int[], int), Graphics.drawPolyline(int[], int[], int)

fillPolygon

public void fillPolygon(int[] xPoints,
                        int[] yPoints,
                        int nPoints)

Description copied from class: Graphics

Fills a closed polygon defined by arrays of x and y coordinates.

The area inside the polygon is defined using an even-odd fill rule, also known as the alternating rule.

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:: Graphics.drawPolygon(int[], int[], int)

fillPolygon

public void fillPolygon(Polygon p)

Description copied from class: Graphics

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 class Graphics

Parameters:: p - the polygon to fill.
See Also:: Graphics.drawPolygon(int[], int[], int)

drawString

public void drawString(String str,
                       int x,
                       int y)

Description copied from class: Graphics

Draws the text given by the specified string, using this graphics context's current font and color. The baseline of the leftmost character is at position (x, y) in this graphics context's coordinate system.

Specified by:: drawString in class Graphics

Parameters:: str - the string to be drawn.; x - the x coordinate.; y - the y coordinate.
See Also:: Graphics.drawBytes(byte[], int, int, int, int), Graphics.drawChars(char[], int, int, int, int)

drawString

public void drawString(AttributedCharacterIterator iterator,
                       int x,
                       int y)

Description copied from class: Graphics

Draws the text given by the specified iterator, using this graphics context's current color. The iterator has to specify a font for each character. The baseline of the leftmost character is at position (x, y) in this graphics context's coordinate system.

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:: Graphics.drawBytes(byte[], int, int, int, int), Graphics.drawChars(char[], int, int, int, int)

drawChars

public void drawChars(char[] data,
                      int offset,
                      int length,
                      int x,
                      int y)

Description copied from class: Graphics

Draws the text given by the specified character array, using this graphics context's current font and color. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.

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:: Graphics.drawBytes(byte[], int, int, int, int), Graphics.drawString(java.lang.String, int, int)

drawBytes

public void drawBytes(byte[] data,
                      int offset,
                      int length,
                      int x,
                      int y)

Description copied from class: Graphics

Draws the text given by the specified byte array, using this graphics context's current font and color. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.

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:: Graphics.drawChars(char[], int, int, int, int), Graphics.drawString(java.lang.String, int, int)

drawImage

public boolean drawImage(Image img,
                         int x,
                         int y,
                         ImageObserver observer)

Description copied from class: Graphics

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, then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

Specified by:: drawImage in class Graphics

Parameters:: img - the specified image to be drawn.; x - the x coordinate.; y - the y coordinate.; observer - object to be notified as more of the image is converted.
Returns:: true if the image is completely loaded; false otherwise.
See Also:: Image, ImageObserver, ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)

drawImage

public boolean drawImage(Image img,
                         int x,
                         int y,
                         int width,
                         int height,
                         ImageObserver observer)

Description copied from class: Graphics

Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.

The image is drawn inside the specified rectangle of this graphics context's coordinate space, and is scaled if necessary. Transparent pixels do not affect whatever pixels are already there.

This method returns immediately in all cases, even if the entire image has not yet been scaled, dithered, and converted for the current output device. If the current output representation is not yet complete, then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the image observer by calling its imageUpdate method.

A scaled version of an image will not necessarily be available immediately just because an unscaled version of the image has been constructed for this output device. Each size of the image may be cached separately and generated from the original data in a separate image production sequence.

Specified by:: drawImage in class Graphics

Parameters:: img - the specified image to be drawn.; x - the x coordinate.; y - the y coordinate.; width - the width of the rectangle.; height - the height of the rectangle.; observer - object to be notified as more of the image is converted.
Returns:: true if the current output representation is complete; false otherwise.
See Also:: Image, ImageObserver, ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)

drawImage

public boolean drawImage(Image img,
                         int x,
                         int y,
                         Color bgcolor,
                         ImageObserver observer)

Description copied from class: Graphics

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, then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

Specified by:: drawImage in class Graphics

Parameters:: img - the specified image to be drawn.; x - the x coordinate.; y - the y coordinate.; 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(java.awt.Image, int, int, int, int, int)

drawImage

public boolean drawImage(Image img,
                         int x,
                         int y,
                         int width,
                         int height,
                         Color bgcolor,
                         ImageObserver observer)

Description copied from class: Graphics

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 then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

Specified by:: drawImage in class Graphics

Parameters:: img - the specified image to be drawn.; x - the x coordinate.; y - the y coordinate.; 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(java.awt.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)

Description copied from class: Graphics

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 then 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.

Specified by:: drawImage in class Graphics

Parameters:: img - the specified image to be drawn; 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:: true if the current output representation is complete; false otherwise.
See Also:: Image, ImageObserver, ImageObserver.imageUpdate(java.awt.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)

Description copied from class: Graphics

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.

Specified by:: drawImage in class Graphics

Parameters:: img - the specified image to be drawn; 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:: true if the current output representation is complete; false otherwise.
See Also:: Image, ImageObserver, ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)

resetGraphics

private void resetGraphics()

dispose

public void dispose()

Description copied from class: Graphics

Disposes of this graphics context and releases any system resources that it is using. A Graphics object cannot be used after disposehas been called.

When a Java program runs, a large number of Graphics objects can be created within a short time frame. Although the finalization process of the garbage collector also disposes of the same system resources, it is preferable to manually free the associated resources by calling this method rather than to rely on a finalization process which may not run to completion for a long period of time.

Graphics objects which are provided as arguments to the paint and update methods of components are automatically released by the system when those methods return. For efficiency, programmers should call dispose when finished using a Graphics object only if it was created directly from a component or another Graphics object.

Specified by:: dispose in class Graphics

See Also:: Graphics.finalize(), Component.paint(java.awt.Graphics), Component.update(java.awt.Graphics), Component.getGraphics(), Graphics.create()

finalize

public void finalize()

Description copied from class: Graphics

Disposes of this graphics context once it is no longer referenced.

Overrides:: finalize in class Graphics

See Also:: Graphics.dispose()

toString

public String toString()

Description copied from class: Graphics

Returns a String object representing this Graphics object's value.

Overrides:: toString in class Graphics

Returns:: a string representation of this graphics context.

getClipRect

public Rectangle getClipRect()

Description copied from class: Graphics

Returns the bounding rectangle of the current clipping area.

Overrides:: getClipRect in class Graphics

Returns:: the bounding rectangle of the current clipping area or null if no clip is set.

_changeClip

private void _changeClip(int x,
                         int y,
                         int w,
                         int h,
                         boolean set)

recycleSwingGraphics

private static void recycleSwingGraphics(SwingGraphics g)

getRecycledSwingGraphics

private static SwingGraphics getRecycledSwingGraphics()

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javax.swing Class SwingGraphics

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javax.swing
Class SwingGraphics