| drawString |
(Object obj, String str, Number x, Number y [, double alpha]) |
yoix.graphics |
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Prints the characters in
str
starting at the point
(x,y)
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).
The text is drawn using the
font
and
foreground
color selected by the
Graphics
object associated with
obj,
and is painted using the optional
alpha
argument, which should be a number between
0.0
and
1.0,
as the alpha value.
Omitting
alpha
or supplying a value of
1.0
are equivalent.
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| Example: |
The program,
import yoix.*.*;
final double SHADOW = 72.0/36;
final String FONT = "Helvetica-plain-14";
JFrame frame = {
FlowLayout layoutmanager = {
int vgap = 72;
};
Array layout = {
new JCanvas {
Color background = Color.gray;
int state = FALSE;
String text = "Testing";
Insets border = {
double left = SHADOW;
double top = SHADOW;
double right = SHADOW;
double bottom = SHADOW;
};
Graphics graphics = {
String font = FONT;
Color foreground = Color.red;
};
Dimension size = {
double height = graphics.font.height + 10*SHADOW;
double width = stringWidth(graphics.font, text) + 10*SHADOW;
};
paint(clip) {
Font font = graphics.font;
double x = (size.width - stringWidth(this, text))/2;
double y = (size.height + font.height)/2 - font.descent;
drawString(this, text, x, y);
}
actionPerformed(ActionEvent e) {
printf("Carry out action\n");
}
},
};
};
frame.visible = TRUE;
sleep(5);
exit(0);
is a rather complicated example that shows how to build a custom button
with a centered text label out of a canvas.
A fancier button that displays an image rather than a text label is just
as easy.
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| See Also: |
clearRect,
copyArea,
drawArc,
drawImage,
drawLine,
drawOval,
drawPolygon,
drawPolyline,
drawRect,
drawRoundRect,
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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