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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 | |
17 | ## along with this program; if not, write to the Free Software | |
18 | ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | ## | |
20 | ||
21 | import qtcompat | |
a6fe45e1 | 22 | import sigrok.core as sr |
2abf5a93 JS |
23 | |
24 | QtCore = qtcompat.QtCore | |
25 | QtGui = qtcompat.QtGui | |
26 | ||
27 | class Setting(QtCore.QObject): | |
28 | '''Wrapper class around the raw 'QSettings' class that emits signals | |
29 | when the value of the setting changes.''' | |
30 | ||
31 | '''Signal emitted when the setting has changed.''' | |
32 | changed = QtCore.Signal(object) | |
33 | ||
a6fe45e1 | 34 | def __init__(self, key, default=None, s=None, d=None): |
ac584e86 JS |
35 | '''Initializes the Settings object. |
36 | ||
37 | :param key: The key of the used 'QSettings' object. | |
38 | :param default: Value returned if the setting doesn't already exist. | |
a6fe45e1 JS |
39 | :param s: Function used to serialize the value into a string. |
40 | :param d: Function used to convert a string into a value. | |
ac584e86 JS |
41 | ''' |
42 | ||
2abf5a93 JS |
43 | super(self.__class__, self).__init__() |
44 | ||
45 | self._key = key | |
46 | self._default = default | |
a6fe45e1 JS |
47 | self._serialize = s if s else (lambda x: x) |
48 | self._deserialize = d if d else (lambda x: x) | |
2abf5a93 JS |
49 | self._value = None |
50 | ||
51 | def value(self): | |
52 | s = QtCore.QSettings() | |
ac584e86 | 53 | v = s.value(self._key, self._default) |
a6fe45e1 | 54 | self._value = self._deserialize(v) |
2abf5a93 JS |
55 | return self._value |
56 | ||
57 | @QtCore.Slot(object) | |
58 | def setValue(self, value): | |
59 | if value != self._value: | |
60 | s = QtCore.QSettings() | |
a6fe45e1 | 61 | s.setValue(self._key, self._serialize(value)) |
2abf5a93 JS |
62 | s.sync() |
63 | self._value = value | |
64 | self.changed.emit(self._value) | |
65 | ||
66 | class _SettingsGroup(object): | |
67 | '''Dummy class to group multiple 'Setting' objects together.''' | |
68 | pass | |
69 | ||
a6fe45e1 JS |
70 | _default_loglevel = 'WARN' |
71 | ||
72 | def _d_loglevel(s): | |
73 | '''Converts a string into a sr.LogLevel.''' | |
74 | d = { | |
75 | 'NONE': sr.LogLevel.NONE, | |
76 | 'ERR': sr.LogLevel.ERR, | |
77 | 'WARN': sr.LogLevel.WARN, | |
78 | 'INFO': sr.LogLevel.INFO, | |
79 | 'DBG': sr.LogLevel.DBG, | |
80 | 'SPEW': sr.LogLevel.SPEW | |
81 | } | |
82 | ||
83 | if not (s in d): | |
84 | s = _default_loglevel | |
85 | ||
86 | return d[s] | |
87 | ||
88 | def _s_loglevel(l): | |
89 | '''Converts a sr.LogLevel into a string.''' | |
90 | return l.name | |
91 | ||
2abf5a93 JS |
92 | def init(): |
93 | '''Creates the 'Settings' objects for all known settings and places them | |
94 | into the module's namespace. | |
95 | ||
96 | A QApplication must have been created before this function can be called. | |
97 | ''' | |
98 | ||
99 | app = QtGui.QApplication.instance() | |
100 | app.setApplicationName('sigrok-meter') | |
101 | app.setOrganizationName('sigrok') | |
102 | app.setOrganizationDomain('sigrok.org') | |
103 | ||
104 | mainwindow = _SettingsGroup() | |
105 | mainwindow.size = Setting('mainwindow/size', QtCore.QSize(900, 550)) | |
106 | mainwindow.pos = Setting('mainwindow/pos') | |
107 | globals()['mainwindow'] = mainwindow | |
ac584e86 JS |
108 | |
109 | graph = _SettingsGroup() | |
a6fe45e1 | 110 | graph.backlog = Setting('graph/backlog', 30, d=int) |
ac584e86 | 111 | globals()['graph'] = graph |
a6fe45e1 JS |
112 | |
113 | logging = _SettingsGroup() | |
114 | logging.level = Setting('logging/level', _default_loglevel, | |
115 | s=_s_loglevel, d=_d_loglevel) | |
116 | logging.lines = Setting('logging/lines', 1000, d=int) | |
117 | globals()['logging'] = logging |