| copyArea |
(Object obj, Number x, Number y, Number w, Number h, Number dx, Number dy) |
yoix.graphics |
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Copies pixels in
obj,
which must be an
Image
or a drawable component (i.e., a Swing or AWT component, like a
JCanvas,
JFrame,
or
Canvas,
that supports a
paint
function),
from the user space rectangle that is
w
units wide,
h
units high, and has its upper left corner at the point
(x,y)
to the corresponding user space rectangle that has its upper left corner at the point
(x+dx,y+dy).
We use clipping to try to improve the behavior of
copyArea
in rotated coordinate systems, however clipping support in Java's implementation
of copyArea() only appeared in Java 1.6, so versions of Java older than 1.6 will
still misbehave.
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| Example: |
The program,
import yoix.*.*;
Image img = {
String source = "";
Dimension size = {
int height = 72;
int width = 2*72;
};
Graphics graphics = {
String font = "Helvetica-plain-12";
Color foreground = Color.blue;
};
paint(clip) {
int x = 10;
int y = graphics.font.ascent;
int width = stringWidth(this, "Testing...");
int height = graphics.font.ascent + graphics.font.descent;
drawString(this, "Testing", x, y);
copyArea(this, x, 0, width, height, 10, 2*height);
}
};
JFrame frame = {
Image backgroundimage = img;
int backgroundhints = SCALE_TILE;
};
frame.visible = TRUE;
sleep(5);
exit(0);
defines a paint function in an image that prints
Testing
near the image's upper left corner, copies that string to a different part
of the image using
copyArea,
and then the tiles a frame with the image.
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| See Also: |
clearRect,
drawArc,
drawImage,
drawLine,
drawOval,
drawPolygon,
drawPolyline,
drawRect,
drawRoundRect,
drawString,
fillArc,
fillOval,
fillPolygon,
fillRect,
fillRoundRect,
pointInPolygon,
pointInRect,
rectContainsRect,
rectIntersectionRect,
rectIntersectsRect,
rectUnionRect,
stringBounds,
stringWidth
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Yoix is a registered trademark of AT&T Inc.
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