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1 | ## | |
2 | ## This file is part of the sigrok-meter project. | |
3 | ## | |
4 | ## Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | ## Copyright (C) 2014 Jens Steinhauser <jens.steinhauser@gmail.com> | |
6 | ## | |
7 | ## This program is free software; you can redistribute it and/or modify | |
8 | ## it under the terms of the GNU General Public License as published by | |
9 | ## the Free Software Foundation; either version 2 of the License, or | |
10 | ## (at your option) any later version. | |
11 | ## | |
12 | ## This program is distributed in the hope that it will be useful, | |
13 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ## GNU General Public License for more details. | |
16 | ## | |
17 | ## You should have received a copy of the GNU General Public License | |
18 | ## along with this program; if not, write to the Free Software | |
19 | ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | ## | |
21 | ||
22 | import datamodel | |
23 | import os.path | |
24 | import qtcompat | |
25 | import samplingthread | |
26 | import textwrap | |
27 | ||
28 | QtCore = qtcompat.QtCore | |
29 | QtGui = qtcompat.QtGui | |
30 | ||
31 | class EmptyMessageListView(QtGui.QListView): | |
32 | '''List view that shows a message if the model im empty.''' | |
33 | ||
34 | def __init__(self, message, parent=None): | |
35 | super(self.__class__, self).__init__(parent) | |
36 | ||
37 | self._message = message | |
38 | ||
39 | def paintEvent(self, event): | |
40 | m = self.model() | |
41 | if m and m.rowCount(): | |
42 | super(self.__class__, self).paintEvent(event) | |
43 | return | |
44 | ||
45 | painter = QtGui.QPainter(self.viewport()) | |
46 | painter.drawText(self.rect(), QtCore.Qt.AlignCenter, self._message) | |
47 | ||
48 | class MainWindow(QtGui.QMainWindow): | |
49 | '''The main window of the application.''' | |
50 | ||
51 | def __init__(self, context, drivers): | |
52 | super(self.__class__, self).__init__() | |
53 | ||
54 | self.context = context | |
55 | ||
56 | self.delegate = datamodel.MultimeterDelegate(self, self.font()) | |
57 | self.model = datamodel.MeasurementDataModel(self) | |
58 | self.model.rowsInserted.connect(self.modelRowsInserted) | |
59 | ||
60 | self.setup_ui() | |
61 | ||
62 | self.thread = samplingthread.SamplingThread(self.context, drivers) | |
63 | self.thread.measured.connect(self.model.update) | |
64 | self.thread.error.connect(self.error) | |
65 | self.thread.start() | |
66 | ||
67 | def setup_ui(self): | |
68 | self.setWindowTitle('sigrok-meter') | |
69 | # resizing the listView below will increase this again | |
70 | self.resize(10, 10) | |
71 | ||
72 | p = os.path.abspath(os.path.dirname(__file__)) | |
73 | p = os.path.join(p, 'sigrok-logo-notext.png') | |
74 | self.setWindowIcon(QtGui.QIcon(p)) | |
75 | ||
76 | actionQuit = QtGui.QAction(self) | |
77 | actionQuit.setText('&Quit') | |
78 | actionQuit.setIcon(QtGui.QIcon.fromTheme('application-exit')) | |
79 | actionQuit.setShortcut('Ctrl+Q') | |
80 | actionQuit.triggered.connect(self.close) | |
81 | ||
82 | actionAbout = QtGui.QAction(self) | |
83 | actionAbout.setText('&About') | |
84 | actionAbout.setIcon(QtGui.QIcon.fromTheme('help-about')) | |
85 | actionAbout.triggered.connect(self.show_about) | |
86 | ||
87 | menubar = self.menuBar() | |
88 | menuFile = menubar.addMenu('&File') | |
89 | menuFile.addAction(actionQuit) | |
90 | menuHelp = menubar.addMenu('&Help') | |
91 | menuHelp.addAction(actionAbout) | |
92 | ||
93 | self.listView = EmptyMessageListView('waiting for data...') | |
94 | self.listView.setFrameShape(QtGui.QFrame.NoFrame) | |
95 | self.listView.viewport().setBackgroundRole(QtGui.QPalette.Window) | |
96 | self.listView.viewport().setAutoFillBackground(True) | |
97 | self.listView.setMinimumWidth(260) | |
98 | self.listView.setSelectionMode(QtGui.QAbstractItemView.NoSelection) | |
99 | self.listView.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers) | |
100 | self.listView.setVerticalScrollMode(QtGui.QAbstractItemView.ScrollPerPixel) | |
101 | self.listView.setItemDelegate(self.delegate) | |
102 | self.listView.setModel(self.model) | |
103 | self.listView.setUniformItemSizes(True) | |
104 | self.listView.setMinimumSize(self.delegate.sizeHint()) | |
105 | ||
106 | self.setCentralWidget(self.listView) | |
107 | self.centralWidget().setContentsMargins(0, 0, 0, 0) | |
108 | ||
109 | def closeEvent(self, event): | |
110 | self.thread.stop() | |
111 | event.accept() | |
112 | ||
113 | @QtCore.Slot() | |
114 | def show_about(self): | |
115 | text = textwrap.dedent('''\ | |
116 | <div align="center"> | |
117 | <b>sigrok-meter</b><br/> | |
118 | 0.1.0<br/> | |
119 | Using libsigrok {} (lib version {}).<br/> | |
120 | <a href='http://www.sigrok.org'> | |
121 | http://www.sigrok.org</a><br/> | |
122 | <br/> | |
123 | This program comes with ABSOLUTELY NO WARRANTY;<br/> | |
124 | for details visit | |
125 | <a href='http://www.gnu.org/licenses/gpl.html'> | |
126 | http://www.gnu.org/licenses/gpl.html</a> | |
127 | </div> | |
128 | '''.format(self.context.package_version, self.context.lib_version)) | |
129 | ||
130 | QtGui.QMessageBox.about(self, 'About sigrok-meter', text) | |
131 | ||
132 | @QtCore.Slot(str) | |
133 | def error(self, msg): | |
134 | '''Error handler for the sampling thread.''' | |
135 | QtGui.QMessageBox.critical(self, 'Error', msg) | |
136 | self.close() | |
137 | ||
138 | @QtCore.Slot(object, int, int) | |
139 | def modelRowsInserted(self, parent, start, end): | |
140 | '''Resizes the list view to the size of the content.''' | |
141 | ||
142 | rows = self.model.rowCount() | |
143 | dh = self.delegate.sizeHint().height() | |
144 | self.listView.setMinimumHeight(dh * rows) |