| instroke |
(Point p) |
typedict.Graphics |
| instroke |
(Number x, Number y) |
|
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Returns non-zero if
p
or the point
(x, y)
would be painted if the current
path
were stroked using the values currently assigned to
linewidth,
linecap,
linejoin,
miterlimit,
dasharray,
dashphase,
and
CTM.
| |
| Example: |
The program,
import yoix.*.*;
JFrame frame = {
Graphics graphics = {
double linewidth = 20.0;
int linecap = CAP_ROUND;
};
paint() {
graphics {
if (currentpoint() == NULL) {
translate(72, 144);
rotate(-45);
scale(.5, .5);
shear(0, .5);
arc(144, 144, 144, 0, 180);
}
gsave();
stroke();
grestore();
}
}
mousePressed(MouseEvent e) {
printf("hit=%d\n", graphics.instroke(e.coordinates));
}
};
frame.visible = TRUE;
defines a paint function in a frame that strokes an arc in a
transformed coordinate system and then uses
instroke
in to decide if a button was pressed when the cursor was inside
the stroked path.
Notice that we used
e.coordinates
rather than
e.location
in the event handler.
Both values are defined and can be identical, but
e.location
always represents the location of the event in the Yoix default
coordinate system, while
e.coordinates
are the user space coordinates of the event in the frame,
which depend on the values stored in
CTM
when the event arrives.
| | |
| Return: |
int
| | |
| See Also: |
clip,
clippath,
drawablebbox,
eoclip,
eoerase,
eofill,
erase,
erasedrawable,
fill,
ineofill,
infill,
rectbutton,
rectclip,
rectcopy,
recterase,
rectfill,
rectmove,
rectstroke,
stroke,
strokepath
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Yoix is a registered trademark of AT&T Inc.
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