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Taddeüs Kroes
multitouch
Commits
d78ee60a
Commit
d78ee60a
authored
Jun 08, 2012
by
Taddeüs Kroes
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Added a test program that uses GTK with Cairo to draw widgets and tests event propagation.
parent
73e05a5d
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tests/cairotest.py
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#!/usr/bin/env python
from
__future__
import
division
import
gtk
import
cairo
from
math
import
radians
from
threading
import
Thread
import
src
as
mt
def
quit
(
*
args
):
gtk
.
main_quit
()
class
Rectangle
(
mt
.
RectangularWidget
):
def
__init__
(
self
,
x
,
y
,
width
,
height
,
color
=
(
1
,
0
,
0
)):
super
(
Rectangle
,
self
).
__init__
(
x
,
y
,
width
,
height
)
self
.
angle
=
0
self
.
scale
=
1
self
.
color
=
color
def
scale
(
self
,
angle
):
self
.
scale
*=
scale
def
rotate
(
self
,
angle
):
self
.
angle
+=
angle
def
get_transformation_matrix
(
self
):
t
=
cairo
.
Matrix
()
t
.
translate
(
*
self
.
get_position
())
t
.
rotate
(
self
.
angle
)
t
.
scale
(
self
.
scale
,
self
.
scale
)
return
t
def
draw
(
self
,
cr
):
cr
.
transform
(
self
.
get_transformation_matrix
())
w
,
h
=
self
.
get_size
()
cr
.
rectangle
(
-
w
/
2
,
-
h
/
2
,
w
,
h
)
cr
.
set_source_rgb
(
*
self
.
color
)
cr
.
fill
()
fullscreen
=
False
W
,
H
=
mt
.
screen
.
screen_size
def
create_context_window
(
w
,
h
,
callback
):
def
create_context
(
area
,
event
):
"""Add Cairo context to GTK window and draw initial state."""
global
cr
#if cr:
# return
cr
=
area
.
window
.
cairo_create
()
draw
()
def
move_window
(
win
,
event
):
"""Synchronize root multi-touch widget with GTK window."""
root
.
set_position
(
*
event
.
get_coords
())
root
.
set_size
(
event
.
width
,
event
.
height
)
draw
()
def
handle_key
(
win
,
event
):
"""Handle key event. 'f' toggles fullscreen, 'q' exits the program."""
if
event
.
keyval
>=
256
:
return
key
=
chr
(
event
.
keyval
)
if
key
==
'f'
:
global
fullscreen
(
win
.
unfullscreen
if
fullscreen
else
win
.
fullscreen
)()
fullscreen
=
not
fullscreen
elif
key
==
'q'
:
quit
()
# Root widget (will be synchronized with GTK window)
global
root
root
=
mt
.
RectangularWidget
(
0
,
0
,
w
,
h
)
# GTK window
win
=
gtk
.
Window
()
win
.
set_title
(
'Cairo test'
)
win
.
connect
(
'destroy'
,
quit
)
win
.
connect
(
'key-press-event'
,
handle_key
)
win
.
connect
(
'configure-event'
,
move_window
)
win
.
connect
(
'show'
,
callback
)
# Drawing area, needed by cairo context for drawing
area
=
gtk
.
DrawingArea
()
area
.
set_size_request
(
w
,
h
)
area
.
connect
(
'expose-event'
,
create_context
)
win
.
add
(
area
)
area
.
show
()
win
.
show
()
def
draw
():
# Background
cr
.
rectangle
(
0
,
0
,
*
root
.
get_size
())
cr
.
set_source_rgb
(
0
,
1
,
0
)
cr
.
fill
()
# Drawable objects (use save and restore to allow transformations)
for
obj
in
draw_objects
:
#cr.save()
obj
.
draw
(
cr
)
#cr.restore()
# Initialization
cr
=
root
=
None
draw_objects
=
[]
def
on_show
(
window
):
def
root_dtap
(
g
):
print
'double tapped on root'
root
.
on_double_tap
(
root_dtap
)
# Create blue rectangle
rect
=
Rectangle
(
300
,
200
,
250
,
150
,
color
=
(
0
,
0
,
1
))
draw_objects
.
append
(
rect
)
root
.
add_widget
(
rect
)
def
rect_tap
(
g
):
print
'tapped on rectangle'
rect
.
on_tap
(
rect_tap
,
propagate_up_event
=
False
)
if
__name__
==
'__main__'
:
# Parse arguments
from
tests.parse_arguments
import
create_parser
,
parse_args
parse_args
(
create_parser
())
# Create a window with a Cairo context in it and a multi-touch widget
# syncronized with it
create_context_window
(
640
,
460
,
on_show
)
# Run multi-touch gesture server in separate thread
server
=
mt
.
EventServer
(
root
)
mt_thread
=
Thread
(
target
=
server
.
start
)
mt_thread
.
daemon
=
True
mt_thread
.
start
()
# Initialize threads in GTK so that the thread started above will work
gtk
.
gdk
.
threads_init
()
# Start main loop in current thread
gtk
.
main
()
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