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java.lang.Object java.awt.Graphics javax.swing.SystemEventQueueUtilities.RunnableCanvasGraphics
A no-op Graphics object for the RunnableCanvas component. Most AWT Component implementations handle update events like this:
Graphics g = getGraphics(); Rectangle r = ((PaintEvent)e).getUpdateRect(); g.clipRect(r.x, r.y, r.width, r.height); update(g) g.dispose();Since the RunnableCanvas component isn't really going to do any painting we don't bother with creating/disposing real graphics objects, or setting any of the properties.
Constructor Summary | |
private |
SystemEventQueueUtilities.RunnableCanvasGraphics()
|
Method Summary | |
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 w,
int h,
int dx,
int dy)
Copies an area of the component by a distance specified by dx and dy . |
Graphics |
create()
Creates a new Graphics object that is
a copy of this Graphics object. |
void |
dispose()
Disposes of this graphics context and releases any system resources that it is using. |
void |
drawArc(int x,
int y,
int w,
int h,
int sa,
int aa)
Draws the outline of a circular or elliptical arc covering the specified rectangle. |
boolean |
drawImage(Image i,
int x,
int y,
Color bgcolor,
ImageObserver o)
Draws as much of the specified image as is currently available. |
boolean |
drawImage(Image i,
int x,
int y,
ImageObserver o)
Draws as much of the specified image as is currently available. |
boolean |
drawImage(Image i,
int x,
int y,
int w,
int h,
Color c,
ImageObserver o)
Draws as much of the specified image as has already been scaled to fit inside the specified rectangle. |
boolean |
drawImage(Image i,
int x,
int y,
int w,
int h,
ImageObserver o)
Draws as much of the specified image as has already been scaled to fit inside the specified rectangle. |
boolean |
drawImage(Image i,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
Color c,
ImageObserver o)
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 i,
int dx1,
int dy1,
int dx2,
int dy2,
int sx1,
int sy1,
int sx2,
int sy2,
ImageObserver o)
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 w,
int h)
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 |
drawPolyline(int[] xPoints,
int[] yPoints,
int nPoints)
Draws a sequence of connected lines defined by arrays of x and y coordinates. |
void |
drawRoundRect(int x,
int y,
int w,
int h,
int aw,
int ah)
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 |
fillArc(int x,
int y,
int w,
int h,
int sa,
int aa)
Fills a circular or elliptical arc covering the specified rectangle. |
void |
fillOval(int x,
int y,
int w,
int h)
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 |
fillRect(int x,
int y,
int width,
int height)
Fills the specified rectangle. |
void |
fillRoundRect(int x,
int y,
int w,
int h,
int aw,
int ah)
Fills the specified rounded corner rectangle with the current color. |
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. |
Font |
getFont()
Gets the current font. |
FontMetrics |
getFontMetrics(Font f)
Gets the font metrics for the specified font. |
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 c)
Sets the paint mode of this graphics context to alternate between this graphics context's current color and the new specified color. |
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 |
create, draw3DRect, drawBytes, drawChars, drawPolygon, drawRect, fill3DRect, fillPolygon, finalize, getClipBounds, getClipRect, getFontMetrics, hitClip, toString |
Methods inherited from class java.lang.Object |
clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
private SystemEventQueueUtilities.RunnableCanvasGraphics()
Method Detail |
public Graphics create()
Graphics
Graphics
object that is
a copy of this Graphics
object.
create
in class Graphics
public Rectangle getClipBounds()
Graphics
setClip(null)
, this method returns
null
.
The coordinates in the rectangle are relative to the coordinate
system origin of this graphics context.
getClipBounds
in class Graphics
null
if no clip is set.Graphics.getClip()
,
Graphics.clipRect(int, int, int, int)
,
Graphics.setClip(int, int, int, int)
,
Graphics.setClip(Shape)
public Shape getClip()
Graphics
setClip(null)
, this method returns
null
.
getClip
in class Graphics
Shape
object representing the
current clipping area, or null
if
no clip is set.Graphics.getClipBounds()
,
Graphics.clipRect(int, int, int, int)
,
Graphics.setClip(int, int, int, int)
,
Graphics.setClip(Shape)
public void dispose()
Graphics
Graphics
object cannot be used after
dispose
has 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.
dispose
in class Graphics
Graphics.finalize()
,
Component.paint(java.awt.Graphics)
,
Component.update(java.awt.Graphics)
,
Component.getGraphics()
,
Graphics.create()
public void translate(int x, int y)
Graphics
translate
in class Graphics
x
- the x coordinate.y
- the y coordinate.public Color getColor()
Graphics
getColor
in class Graphics
Color
,
Graphics.setColor(Color)
public void setColor(Color c)
Graphics
setColor
in class Graphics
c
- the new rendering color.Color
,
Graphics.getColor()
public void setPaintMode()
Graphics
setPaintMode
in class Graphics
public void setXORMode(Color c)
Graphics
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.
setXORMode
in class Graphics
c
- the XOR alternation colorpublic Font getFont()
Graphics
getFont
in class Graphics
Font
,
Graphics.setFont(Font)
public void setFont(Font font)
Graphics
setFont
in class Graphics
font
- the font.Graphics.getFont()
,
Graphics.drawString(java.lang.String, int, int)
,
Graphics.drawBytes(byte[], int, int, int, int)
,
Graphics.drawChars(char[], int, int, int, int)
public FontMetrics getFontMetrics(Font f)
Graphics
getFontMetrics
in class Graphics
f
- the specified font
Graphics.getFont()
,
FontMetrics
,
Graphics.getFontMetrics()
public void clipRect(int x, int y, int width, int height)
Graphics
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.
clipRect
in class Graphics
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 withGraphics.setClip(int, int, int, int)
,
Graphics.setClip(Shape)
public void setClip(int x, int y, int width, int height)
Graphics
setClip
in class Graphics
x
- the x coordinate of the new clip rectangle.y
- the y coordinate of the new clip rectangle.width
- the width of the new clip rectangle.height
- the height of the new clip rectangle.Graphics.clipRect(int, int, int, int)
,
Graphics.setClip(Shape)
,
Graphics.getClip()
public void setClip(Shape clip)
Graphics
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.
setClip
in class Graphics
clip
- the Shape
to use to set the clipGraphics.getClip()
,
Graphics.clipRect(int, int, int, int)
,
Graphics.setClip(int, int, int, int)
public void copyArea(int x, int y, int w, int h, int dx, int dy)
Graphics
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.
copyArea
in class Graphics
x
- the x coordinate of the source rectangle.y
- the y coordinate of the source rectangle.w
- the width of the source rectangle.h
- the height of the source rectangle.dx
- the horizontal distance to copy the pixels.dy
- the vertical distance to copy the pixels.public void drawLine(int x1, int y1, int x2, int y2)
Graphics
(x1, y1)
and (x2, y2)
in this graphics context's coordinate system.
drawLine
in class Graphics
x1
- the first point's x coordinate.y1
- the first point's y coordinate.x2
- the second point's x coordinate.y2
- the second point's y coordinate.public void fillRect(int x, int y, int width, int height)
Graphics
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.
fillRect
in class Graphics
x
- the x coordinate
of the rectangle to be filled.y
- the y coordinate
of the rectangle to be filled.width
- the width of the rectangle to be filled.height
- the height of the rectangle to be filled.Graphics.clearRect(int, int, int, int)
,
Graphics.drawRect(int, int, int, int)
public void clearRect(int x, int y, int width, int height)
Graphics
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.
clearRect
in class Graphics
x
- the x coordinate of the rectangle to clear.y
- the y coordinate of the rectangle to clear.width
- the width of the rectangle to clear.height
- the height of the rectangle to clear.Graphics.fillRect(int, int, int, int)
,
Graphics.drawRect(int, int, int, int)
,
Graphics.setColor(java.awt.Color)
,
Graphics.setPaintMode()
,
Graphics.setXORMode(java.awt.Color)
public void drawRoundRect(int x, int y, int w, int h, int aw, int ah)
Graphics
x
and x + width
,
respectively. The top and bottom edges of the rectangle are at
y
and y + height
.
drawRoundRect
in class Graphics
x
- the x coordinate of the rectangle to be drawn.y
- the y coordinate of the rectangle to be drawn.w
- the width of the rectangle to be drawn.h
- the height of the rectangle to be drawn.aw
- the horizontal diameter of the arc
at the four corners.ah
- the vertical diameter of the arc
at the four corners.Graphics.fillRoundRect(int, int, int, int, int, int)
public void fillRoundRect(int x, int y, int w, int h, int aw, int ah)
Graphics
x
and x + width - 1
,
respectively. The top and bottom edges of the rectangle are at
y
and y + height - 1
.
fillRoundRect
in class Graphics
x
- the x coordinate of the rectangle to be filled.y
- the y coordinate of the rectangle to be filled.w
- the width of the rectangle to be filled.h
- the height of the rectangle to be filled.aw
- the horizontal diameter
of the arc at the four corners.ah
- the vertical diameter
of the arc at the four corners.Graphics.drawRoundRect(int, int, int, int, int, int)
public void drawOval(int x, int y, int w, int h)
Graphics
x
, y
,
width
, and height
arguments.
The oval covers an area that is
width + 1
pixels wide
and height + 1
pixels tall.
drawOval
in class Graphics
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.w
- the width of the oval to be drawn.h
- the height of the oval to be drawn.Graphics.fillOval(int, int, int, int)
public void fillOval(int x, int y, int w, int h)
Graphics
fillOval
in class Graphics
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.w
- the width of the oval to be filled.h
- the height of the oval to be filled.Graphics.drawOval(int, int, int, int)
public void drawArc(int x, int y, int w, int h, int sa, int aa)
Graphics
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.
drawArc
in class Graphics
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.w
- the width of the arc to be drawn.h
- the height of the arc to be drawn.sa
- the beginning angle.aa
- the angular extent of the arc,
relative to the start angle.Graphics.fillArc(int, int, int, int, int, int)
public void fillArc(int x, int y, int w, int h, int sa, int aa)
Graphics
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.
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.
fillArc
in class Graphics
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.w
- the width of the arc to be filled.h
- the height of the arc to be filled.sa
- the beginning angle.aa
- the angular extent of the arc,
relative to the start angle.Graphics.drawArc(int, int, int, int, int, int)
public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
Graphics
drawPolyline
in class Graphics
xPoints
- an array of x pointsyPoints
- an array of y pointsnPoints
- the total number of pointsGraphics.drawPolygon(int[], int[], int)
public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
Graphics
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.
drawPolygon
in class Graphics
xPoints
- a an array of x
coordinates.yPoints
- a an array of y
coordinates.nPoints
- a the total number of points.Graphics.fillPolygon(int[], int[], int)
,
Graphics.drawPolyline(int[], int[], int)
public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
Graphics
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.
The area inside the polygon is defined using an even-odd fill rule, also known as the alternating rule.
fillPolygon
in class Graphics
xPoints
- a an array of x
coordinates.yPoints
- a an array of y
coordinates.nPoints
- a the total number of points.Graphics.drawPolygon(int[], int[], int)
public void drawString(String str, int x, int y)
Graphics
drawString
in class Graphics
str
- the string to be drawn.x
- the x coordinate.y
- the y coordinate.Graphics.drawBytes(byte[], int, int, int, int)
,
Graphics.drawChars(char[], int, int, int, int)
public void drawString(AttributedCharacterIterator iterator, int x, int y)
Graphics
drawString
in class Graphics
iterator
- the iterator whose text is to be drawnx
- the x coordinate.y
- the y coordinate.Graphics.drawBytes(byte[], int, int, int, int)
,
Graphics.drawChars(char[], int, int, int, int)
public boolean drawImage(Image i, int x, int y, ImageObserver o)
Graphics
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.
drawImage
in class Graphics
i
- the specified image to be drawn.x
- the x coordinate.y
- the y coordinate.o
- object to be notified as more of
the image is converted.
true
if the image is completely loaded;
false
otherwise.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public boolean drawImage(Image i, int x, int y, int w, int h, ImageObserver o)
Graphics
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.
drawImage
in class Graphics
i
- the specified image to be drawn.x
- the x coordinate.y
- the y coordinate.w
- the width of the rectangle.h
- the height of the rectangle.o
- object to be notified as more of
the image is converted.
true
if the current output representation
is complete; false
otherwise.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public boolean drawImage(Image i, int x, int y, Color bgcolor, ImageObserver o)
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.
drawImage
in class Graphics
i
- 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.o
- object to be notified as more of
the image is converted.
true
if the image is completely loaded;
false
otherwise.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public boolean drawImage(Image i, int x, int y, int w, int h, Color c, ImageObserver o)
Graphics
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.
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.
drawImage
in class Graphics
i
- the specified image to be drawn.x
- the x coordinate.y
- the y coordinate.w
- the width of the rectangle.h
- the height of the rectangle.c
- the background color to paint under the
non-opaque portions of the image.o
- object to be notified as more of
the image is converted.
true
if the current output representation
is complete; false
otherwise.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public boolean drawImage(Image i, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver o)
Graphics
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.
drawImage
in class Graphics
i
- 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.o
- object to be notified as more of the image is
scaled and converted.
true
if the current output representation
is complete; false
otherwise.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
public boolean drawImage(Image i, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color c, ImageObserver o)
Graphics
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 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.
drawImage
in class Graphics
i
- 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.c
- the background color to paint under the
non-opaque portions of the image.o
- object to be notified as more of the image is
scaled and converted.
true
if the current output representation
is complete; false
otherwise.Image
,
ImageObserver
,
ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)
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