forked from KenT2/pipresents
/
pp_messageplayer.py
164 lines (128 loc) · 4.88 KB
/
pp_messageplayer.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
from Tkinter import *
import Tkinter
import time
from pp_utils import Monitor
class MessagePlayer:
""" Displays lines of text in the centre of a black screen"""
# *******************
# external commands
# *******************
def __init__(self,canvas,cd,track_params):
"""
canvas - the canvas onto which the image is to be drawn
cd - configuration dictionary for the show from which player was called
"""
self.mon=Monitor()
self.mon.on()
self.canvas=canvas
self.cd=cd
self.track_params=track_params
# get config from medialist if there.
if 'duration' in self.track_params and self.track_params['duration']<>"":
self.duration= int(self.track_params['duration'])
else:
self.duration= int(self.cd['duration'])
# keep dwell and porch as an integer multiple of tick
self.tick = 100 # tick time for image display (milliseconds)
self.dwell = (1000*self.duration)
self.centre_x = int(self.canvas['width'])/2
self.centre_y = int(self.canvas['height'])/2
def play(self,
text,
end_callback,
ready_callback,
enable_menu=False,
starting_callback=None,
playing_callback=None,
ending_callback=None):
# instantiate arguments
self.text=text
self.enable_menu=enable_menu
self.ready_callback=ready_callback
self.end_callback=end_callback
#init state and signals
self.quit_signal=False
self.kill_required_signal=False
self.error=False
self._tick_timer=None
self.drawn=None
# and start text display
self._start_dwell()
def key_pressed(self,key_name):
self.mon.log(self,"key received: "+key_name)
if key_name=='':
return
elif key_name in ('p'):
return
elif key_name=='escape':
self._stop()
return
def button_pressed(self,button,edge):
self.mon.log(self,"button received: "+button)
if button =='pause':
return
elif button=='stop':
self._stop()
return
def terminate(self,reason):
if reason=='error':
self.error=True
else:
self.kill_required_signal=True
self.quit_signal=True
# *******************
# internal functions
# *******************
def _stop(self):
self.quit_signal=True
def _error(self):
self.error=True
self.quit_signal=True
#called when dwell has completed or quit signal is received
def _end(self,reason,message):
if self._tick_timer<>None:
self.canvas.after_cancel(self._tick_timer)
self._tick_timer=None
self.quit_signal=False
#self.canvas.delete(ALL)
self.canvas.update_idletasks( )
if self.error==True:
self.end_callback("error",message)
self=None
elif self.kill_required_signal==True:
self.end_callback("killed",message)
self=None
else:
self.end_callback('normal',message)
self=None
def _start_dwell(self):
self.dwell_counter=0
if self.ready_callback<>None:
self.ready_callback()
# display text
self.canvas.create_text(self.centre_x, self.centre_y,
text=self.text.rstrip('\n'),
fill=self.track_params['message-colour'],
font=self.track_params['message-font'])
# display instructions (hint)
if self.enable_menu==True:
self.canvas.create_text(int(self.canvas['width'])/2,
int(self.canvas['height']) - int(self.cd['hint-y']),
text=self.cd['hint-text'],
fill=self.cd['hint-colour'],
font=self.cd['hint-font'])
self.canvas.update_idletasks( )
self._tick_timer=self.canvas.after(self.tick, self._do_dwell)
def _do_dwell(self):
if self.quit_signal == True:
self.mon.log(self,"quit received")
self._end('normal','user quit')
else:
if self.dwell<>0:
self.dwell_counter=self.dwell_counter+1
if self.dwell_counter==self.dwell/self.tick:
self._end('normal','finished')
else:
self._tick_timer=self.canvas.after(self.tick, self._do_dwell)
else:
self._tick_timer=self.canvas.after(self.tick, self._do_dwell)