root / trunk / twisted / protocols / mice / mouseman.py

Revision 11450, 2.8 kB (checked in by radix, 5 years ago)

MIT LICENSE: new LICENSE file and new preambles for all .py files. This is not all.

Line 
1 # Copyright (c) 2001-2004 Twisted Matrix Laboratories.
2 # See LICENSE for details.
3
4 #
5 """Logictech MouseMan serial protocol.
6
7 http://www.softnco.demon.co.uk/SerialMouse.txt
8 """
9
10 from twisted.internet import protocol
11
12 class MouseMan(protocol.Protocol):
13     """
14
15     Parser for Logitech MouseMan serial mouse protocol (compatible
16     with Microsoft Serial Mouse).
17
18     """
19
20     state = 'initial'
21
22     leftbutton=None
23     rightbutton=None
24     middlebutton=None
25
26     leftold=None
27     rightold=None
28     middleold=None
29
30     horiz=None
31     vert=None
32     horizold=None
33     vertold=None
34
35     def down_left(self):
36         pass
37
38     def up_left(self):
39         pass
40
41     def down_middle(self):
42         pass
43
44     def up_middle(self):
45         pass
46
47     def down_right(self):
48         pass
49
50     def up_right(self):
51         pass
52
53     def move(self, x, y):
54         pass
55
56     horiz=None
57     vert=None
58
59     def state_initial(self, byte):
60         if byte & 1<<6:
61             self.word1=byte
62             self.leftbutton = byte & 1<<5
63             self.rightbutton = byte & 1<<4
64             return 'horiz'
65         else:
66             return 'initial'
67
68     def state_horiz(self, byte):
69         if byte & 1<<6:
70             return self.state_initial(byte)
71         else:
72             x=(self.word1 & 0x03)<<6 | (byte & 0x3f)
73             if x>=128:
74                 x=-256+x
75             self.horiz = x
76             return 'vert'
77
78     def state_vert(self, byte):
79         if byte & 1<<6:
80             # short packet
81             return self.state_initial(byte)
82         else:
83             x = (self.word1 & 0x0c)<<4 | (byte & 0x3f)
84             if x>=128:
85                 x=-256+x
86             self.vert = x
87             self.snapshot()
88             return 'maybemiddle'
89
90     def state_maybemiddle(self, byte):
91         if byte & 1<<6:
92             self.snapshot()
93             return self.state_initial(byte)
94         else:
95             self.middlebutton=byte & 1<<5
96             self.snapshot()
97             return 'initial'
98
99     def snapshot(self):
100         if self.leftbutton and not self.leftold:
101             self.down_left()
102             self.leftold=1
103         if not self.leftbutton and self.leftold:
104             self.up_left()
105             self.leftold=0
106
107         if self.middlebutton and not self.middleold:
108             self.down_middle()
109             self.middleold=1
110         if not self.middlebutton and self.middleold:
111             self.up_middle()
112             self.middleold=0
113
114         if self.rightbutton and not self.rightold:
115             self.down_right()
116             self.rightold=1
117         if not self.rightbutton and self.rightold:
118             self.up_right()
119             self.rightold=0
120
121         if self.horiz or self.vert:
122             self.move(self.horiz, self.vert)
123
124     def dataReceived(self, data):
125         for c in data:
126             byte = ord(c)
127             self.state = getattr(self, 'state_'+self.state)(byte)
Note: See TracBrowser for help on using the browser.