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2abf5a93 JS |
1 | ## |
2 | ## This file is part of the sigrok-meter project. | |
3 | ## | |
4 | ## Copyright (C) 2015 Jens Steinhauser <jens.steinhauser@gmail.com> | |
5 | ## | |
6 | ## This program is free software; you can redistribute it and/or modify | |
7 | ## it under the terms of the GNU General Public License as published by | |
8 | ## the Free Software Foundation; either version 2 of the License, or | |
9 | ## (at your option) any later version. | |
10 | ## | |
11 | ## This program is distributed in the hope that it will be useful, | |
12 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ## GNU General Public License for more details. | |
15 | ## | |
16 | ## You should have received a copy of the GNU General Public License | |
0b63748b | 17 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. |
2abf5a93 JS |
18 | ## |
19 | ||
20 | import qtcompat | |
a6fe45e1 | 21 | import sigrok.core as sr |
2abf5a93 JS |
22 | |
23 | QtCore = qtcompat.QtCore | |
24 | QtGui = qtcompat.QtGui | |
25 | ||
26 | class Setting(QtCore.QObject): | |
27 | '''Wrapper class around the raw 'QSettings' class that emits signals | |
28 | when the value of the setting changes.''' | |
29 | ||
30 | '''Signal emitted when the setting has changed.''' | |
31 | changed = QtCore.Signal(object) | |
32 | ||
a6fe45e1 | 33 | def __init__(self, key, default=None, s=None, d=None): |
ac584e86 JS |
34 | '''Initializes the Settings object. |
35 | ||
36 | :param key: The key of the used 'QSettings' object. | |
37 | :param default: Value returned if the setting doesn't already exist. | |
a6fe45e1 JS |
38 | :param s: Function used to serialize the value into a string. |
39 | :param d: Function used to convert a string into a value. | |
ac584e86 JS |
40 | ''' |
41 | ||
2abf5a93 JS |
42 | super(self.__class__, self).__init__() |
43 | ||
44 | self._key = key | |
45 | self._default = default | |
a6fe45e1 JS |
46 | self._serialize = s if s else (lambda x: x) |
47 | self._deserialize = d if d else (lambda x: x) | |
2abf5a93 JS |
48 | self._value = None |
49 | ||
50 | def value(self): | |
51 | s = QtCore.QSettings() | |
ac584e86 | 52 | v = s.value(self._key, self._default) |
a6fe45e1 | 53 | self._value = self._deserialize(v) |
2abf5a93 JS |
54 | return self._value |
55 | ||
56 | @QtCore.Slot(object) | |
57 | def setValue(self, value): | |
58 | if value != self._value: | |
59 | s = QtCore.QSettings() | |
a6fe45e1 | 60 | s.setValue(self._key, self._serialize(value)) |
2abf5a93 JS |
61 | s.sync() |
62 | self._value = value | |
63 | self.changed.emit(self._value) | |
64 | ||
65 | class _SettingsGroup(object): | |
66 | '''Dummy class to group multiple 'Setting' objects together.''' | |
67 | pass | |
68 | ||
a6fe45e1 JS |
69 | _default_loglevel = 'WARN' |
70 | ||
71 | def _d_loglevel(s): | |
72 | '''Converts a string into a sr.LogLevel.''' | |
73 | d = { | |
74 | 'NONE': sr.LogLevel.NONE, | |
75 | 'ERR': sr.LogLevel.ERR, | |
76 | 'WARN': sr.LogLevel.WARN, | |
77 | 'INFO': sr.LogLevel.INFO, | |
78 | 'DBG': sr.LogLevel.DBG, | |
79 | 'SPEW': sr.LogLevel.SPEW | |
80 | } | |
81 | ||
82 | if not (s in d): | |
83 | s = _default_loglevel | |
84 | ||
85 | return d[s] | |
86 | ||
87 | def _s_loglevel(l): | |
88 | '''Converts a sr.LogLevel into a string.''' | |
89 | return l.name | |
90 | ||
2abf5a93 JS |
91 | def init(): |
92 | '''Creates the 'Settings' objects for all known settings and places them | |
93 | into the module's namespace. | |
94 | ||
95 | A QApplication must have been created before this function can be called. | |
96 | ''' | |
97 | ||
98 | app = QtGui.QApplication.instance() | |
99 | app.setApplicationName('sigrok-meter') | |
100 | app.setOrganizationName('sigrok') | |
101 | app.setOrganizationDomain('sigrok.org') | |
102 | ||
103 | mainwindow = _SettingsGroup() | |
104 | mainwindow.size = Setting('mainwindow/size', QtCore.QSize(900, 550)) | |
105 | mainwindow.pos = Setting('mainwindow/pos') | |
106 | globals()['mainwindow'] = mainwindow | |
ac584e86 JS |
107 | |
108 | graph = _SettingsGroup() | |
a6fe45e1 | 109 | graph.backlog = Setting('graph/backlog', 30, d=int) |
ac584e86 | 110 | globals()['graph'] = graph |
a6fe45e1 JS |
111 | |
112 | logging = _SettingsGroup() | |
113 | logging.level = Setting('logging/level', _default_loglevel, | |
114 | s=_s_loglevel, d=_d_loglevel) | |
115 | logging.lines = Setting('logging/lines', 1000, d=int) | |
c46081ed | 116 | logging.filename = Setting('logging/filename', '') |
a6fe45e1 | 117 | globals()['logging'] = logging |