<s>
Fyne	B-Library
is	O
a	O
free	B-License
and	I-License
open-source	I-License
cross-platform	B-Operating_System
widget	B-Library
toolkit	I-Library
for	O
creating	O
graphical	B-Application
user	I-Application
interfaces	I-Application
(	O
GUIs	B-Application
)	O
across	O
desktop	O
and	O
mobile	O
platforms	O
.	O
</s>
<s>
Fyne	B-Library
uses	O
OpenGL	B-Application
to	O
provide	O
cross-platform	B-Operating_System
graphics	O
.	O
</s>
<s>
It	O
is	O
inspired	O
by	O
the	O
principles	O
of	O
Material	B-Application
Design	I-Application
to	O
create	O
applications	O
that	O
look	O
and	O
behave	O
consistently	O
across	O
all	O
platforms	O
.	O
</s>
<s>
It	O
is	O
licensed	O
under	O
the	O
terms	O
of	O
the	O
3-clause	B-Operating_System
BSD	I-Operating_System
License	I-Operating_System
,	O
supporting	O
the	O
creation	O
of	O
free	B-Application
and	O
proprietary	B-Application
applications	O
.	O
</s>
<s>
In	O
December	O
2019	O
Fyne	B-Library
became	O
the	O
most	O
popular	O
GUI	B-Library
toolkit	I-Library
for	O
Go	B-Application
,	O
by	O
GitHub	B-Application
star	O
count	O
and	O
in	O
early	O
February	O
2020	O
it	O
was	O
trending	O
as	O
#1	O
project	O
in	O
GitHub	B-Application
trending	O
ranks	O
.	O
</s>
<s>
Fyne	B-Library
is	O
currently	O
developed	O
by	O
a	O
team	O
of	O
volunteers	O
and	O
is	O
supported	O
by	O
around	O
40	O
contributors	O
.	O
</s>
<s>
Members	O
of	O
this	O
group	O
also	O
work	O
on	O
the	O
FyneDesk	O
project	O
to	O
create	O
a	O
new	O
Linux	B-Application
desktop	O
environment	O
.	O
</s>
<s>
The	O
Fyne	B-Library
toolkit	O
is	O
written	O
primarily	O
in	O
Go	B-Application
.	O
</s>
<s>
The	O
team	O
focuses	O
on	O
clean	O
APIs	B-General_Concept
and	O
follows	O
the	O
principles	O
of	O
Clean	O
Code	O
to	O
sustain	O
maintainability	O
of	O
the	O
project	O
.	O
</s>
<s>
All	O
Fyne	B-Library
projects	O
are	O
continuously	O
tested	O
to	O
check	O
correctness	O
,	O
stability	O
as	O
well	O
as	O
formatting	O
and	O
documentation	O
.	O
</s>
<s>
To	O
build	O
this	O
application	O
you	O
will	O
need	O
the	O
Go	B-Application
language	I-Application
and	O
a	O
C	B-Language
compiler	O
installed	O
,	O
as	O
well	O
as	O
a	O
graphics	O
driver	O
that	O
supports	O
OpenGL	B-Application
.	O
</s>
<s>
Design	O
of	O
the	O
Fyne	B-Library
API	B-General_Concept
and	O
user	O
interface	O
components	O
follows	O
a	O
careful	O
process	O
to	O
ensure	O
the	O
simplicity	O
.	O
</s>
<s>
The	O
Fyne	B-Library
toolkit	O
is	O
built	O
in	O
various	O
layers	O
,	O
with	O
each	O
in	O
separate	O
packages	O
.	O
</s>
<s>
API	B-General_Concept
,	O
or	O
Application	O
programming	O
interface	O
,	O
is	O
an	O
interface	O
or	O
protocol	O
that	O
allows	O
for	O
communication	O
across	O
different	O
parts	O
of	O
the	O
software	O
.	O
</s>
<s>
Fyne	B-Library
has	O
a	O
self-documenting	O
API	B-General_Concept
that	O
is	O
also	O
extensible	O
resulting	O
in	O
the	O
ability	O
for	O
each	O
developer	O
to	O
create	O
custom	O
tools	O
unique	O
to	O
their	O
project	O
that	O
will	O
mesh	O
with	O
Fyne	B-Library
itself	O
.	O
</s>
<s>
Fyne	B-Library
widgets	O
include	O
but	O
are	O
not	O
limited	O
to	O
UI	O
basics	O
such	O
as	O
:	O
Button	O
,	O
Check	O
,	O
Form	O
,	O
Hyperlink	O
,	O
Label	O
,	O
</s>
<s>
All	O
the	O
built-in	O
UI	O
widgets	O
ensure	O
that	O
standard	O
aspects	O
of	O
GUI	B-Application
interactivity	O
act	O
in	O
a	O
predictable	O
and	O
expected	O
way	O
across	O
applications	O
.	O
</s>
<s>
All	O
components	O
of	O
Fyne	B-Library
are	O
split	O
into	O
packages	O
and	O
then	O
connected	O
via	O
the	O
API	B-General_Concept
to	O
create	O
a	O
final	O
GUI	B-Application
application	O
.	O
</s>
<s>
Test	O
package	O
enabling	O
test-driven	O
development	O
to	O
validate	O
the	O
GUI	B-Application
itself	O
functions	O
as	O
expected	O
.	O
</s>
<s>
The	O
largest	O
project	O
currently	O
using	O
the	O
Fyne	B-Library
toolkit	O
is	O
the	O
FyneDesk	O
project	O
,	O
a	O
complete	O
desktop	O
environment	O
for	O
Linux	B-Application
.	O
</s>
<s>
Many	O
businesses	O
are	O
using	O
the	O
Fyne	B-Library
toolkit	O
to	O
quickly	O
add	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
to	O
command	O
line	O
tools	O
which	O
they	O
have	O
already	O
built	O
using	O
Go	B-Application
.	O
</s>
<s>
Issue	O
299	O
of	O
Golang	B-Application
Weekly	O
noted	O
the	O
new	O
mobile	O
support	O
from	O
the	O
Fyne	B-Library
project	O
but	O
suggested	O
the	O
design	O
aesthetic	O
was	O
less	O
Material	B-Application
Design	I-Application
and	O
more	O
"	O
generally	O
Linux-y	O
"	O
.	O
</s>
