public
static
void
main
(
String
[]
args
)
{
YDisplay
disp
;
YDisplayLayer
l0, l1
;
int
h, w, y, x, vx, vy
;
// API init
try
{
// setup the API to use local VirtualHub
YAPI
.
RegisterHub
(
"127.0.0.1"
);
}
catch
(
YAPI_Exception
ex
)
{
System
.
out
.
println
(
"Cannot contact VirtualHub on 127.0.0.1 ("
+
ex.
getLocalizedMessage
()
+
")"
);
System
.
out
.
println
(
"Ensure that the VirtualHub application is running"
);
System
.
exit
(
1
);
}
if
(
args.
length
==
0
)
{
disp
=
YDisplay
.
FirstDisplay
();
if
(
disp
==
null
)
{
System
.
out
.
println
(
"No module connected (check USB cable)"
);
System
.
exit
(
1
);
}
}
else
{
disp
=
YDisplay
.
FindDisplay
(
args
[
0
]
+
".display"
);
}
try
{
//clean up
disp.
resetAll
();
// retreive the display size
w
=
disp.
get_displayWidth
();
h
=
disp.
get_displayHeight
();
// reteive the first layer
l0
=
disp.
get_displayLayer
(
0
);
// display a text in the middle of the screen
l0.
drawText
(
w
/
2
, h
/
2
,
YDisplayLayer
.
ALIGN
.
CENTER
,
"Hello world!"
);
// visualize each corner
l0.
moveTo
(
0
,
5
);
l0.
lineTo
(
0
,
0
);
l0.
lineTo
(
5
,
0
);
l0.
moveTo
(
0
, h
-
6
);
l0.
lineTo
(
0
, h
-
1
);
l0.
lineTo
(
5
, h
-
1
);
l0.
moveTo
(
w
-
1
, h
-
6
);
l0.
lineTo
(
w
-
1
, h
-
1
);
l0.
lineTo
(
w
-
6
, h
-
1
);
l0.
moveTo
(
w
-
1
,
5
);
l0.
lineTo
(
w
-
1
,
0
);
l0.
lineTo
(
w
-
6
,
0
);
// draw a circle in the top left corner of layer 1
l1
=
disp.
get_displayLayer
(
1
);
l1.
clear
();
l1.
drawCircle
(
h
/
8
, h
/
8
, h
/
8
);
// and animate the layer
System
.
out
.
println
(
"Use Ctrl-C to stop"
);
x
=
0
;
y
=
0
;
vx
=
1
;
vy
=
1
;
while
(
true
)
{
x
+=
vx
;
y
+=
vy
;
if
((
x
<
0
)
||
(
x
>
w
-
(
h
/
4
)))
{
vx
=
-
vx
;
}
if
((
y
<
0
)
||
(
y
>
h
-
(
h
/
4
)))
{
vy
=
-
vy
;
}
l1.
setLayerPosition
(
x, y,
0
);
18. Using the Yocto-Display with Java
www.yoctopuce.com
109
Summary of Contents for Yocto-Display
Page 1: ...Yocto Display User Manual...
Page 2: ......
Page 40: ...34 www yoctopuce com...
Page 52: ...46 www yoctopuce com...
Page 84: ...78 www yoctopuce com...
Page 92: ...86 www yoctopuce com...
Page 130: ...124 www yoctopuce com...
Page 422: ...416 www yoctopuce com...
