2 ## This file is part of the sigrok-meter project.
4 ## Copyright (C) 2014 Jens Steinhauser <jens.steinhauser@gmail.com>
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.
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.
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
24 import sigrok.core as sr
29 from itertools import izip
33 QtCore = qtcompat.QtCore
34 QtGui = qtcompat.QtGui
37 '''Class to hold the measured samples.'''
43 def append(self, sample):
44 self.samples.append(sample)
47 class MeasurementDataModel(QtGui.QStandardItemModel):
48 '''Model to hold the measured values.'''
50 '''Role used to identify and find the item.'''
51 idRole = QtCore.Qt.UserRole + 1
53 '''Role used to store the device vendor and model.'''
54 descRole = QtCore.Qt.UserRole + 2
56 '''Role used to store a dictionary with the traces'''
57 tracesRole = QtCore.Qt.UserRole + 3
59 '''Role used to store the color to draw the graph of the channel.'''
60 colorRole = QtCore.Qt.UserRole + 4
62 def __init__(self, parent):
63 super(self.__class__, self).__init__(parent)
65 # Use the description text to sort the items for now, because the
66 # idRole holds tuples, and using them to sort doesn't work.
67 self.setSortRole(MeasurementDataModel.descRole)
69 # Used in 'format_value()' to check against.
70 self.inf = float('inf')
72 # A generator for the colors of the channels.
73 self._colorgen = self._make_colorgen()
75 def _make_colorgen(self):
77 QtGui.QColor(0x8F, 0x52, 0x02), # brown
78 QtGui.QColor(0xCC, 0x00, 0x00), # red
79 QtGui.QColor(0xF5, 0x79, 0x00), # orange
80 QtGui.QColor(0xED, 0xD4, 0x00), # yellow
81 QtGui.QColor(0x73, 0xD2, 0x16), # green
82 QtGui.QColor(0x34, 0x65, 0xA4), # blue
83 QtGui.QColor(0x75, 0x50, 0x7B) # violet
87 '''Repeats every element from 'g' 'n' times'.'''
89 for f in itertools.repeat(e, n):
92 colorcycle = itertools.cycle(cols)
93 darkness = myrepeat(itertools.count(100, 10), len(cols))
95 for c, d in izip(colorcycle, darkness):
96 yield QtGui.QColor(c).darker(d)
98 def format_mqflags(self, mqflags):
99 if sr.QuantityFlag.AC in mqflags:
101 elif sr.QuantityFlag.DC in mqflags:
106 def format_value(self, mag):
109 return '{:f}'.format(mag)
111 def getItem(self, device, channel):
112 '''Return the item for the device + channel combination from the
113 model, or create a new item if no existing one matches.'''
115 # Unique identifier for the device + channel.
116 # TODO: Isn't there something better?
120 device.serial_number(),
121 device.connection_id(),
125 # Find the correct item in the model.
126 for row in range(self.rowCount()):
127 item = self.item(row)
128 rid = item.data(MeasurementDataModel.idRole)
129 rid = tuple(rid) # PySide returns a list.
133 # Nothing found, create a new item.
134 desc = '{} {}, {}'.format(
135 device.vendor, device.model, channel.name)
137 item = QtGui.QStandardItem()
138 item.setData(uid, MeasurementDataModel.idRole)
139 item.setData(desc, MeasurementDataModel.descRole)
140 item.setData(collections.defaultdict(Trace), MeasurementDataModel.tracesRole)
141 item.setData(next(self._colorgen), MeasurementDataModel.colorRole)
146 @QtCore.Slot(object, object, object)
147 def update(self, device, channel, data):
148 '''Update the data for the device (+channel) with the most recent
149 measurement from the given payload.'''
151 item = self.getItem(device, channel)
153 value, unit, mqflags = data
154 value_str = self.format_value(value)
155 unit_str = util.format_unit(unit)
156 mqflags_str = self.format_mqflags(mqflags)
158 # The display role is a tuple containing the value and the unit/flags.
159 disp = (value_str, ' '.join([unit_str, mqflags_str]))
160 item.setData(disp, QtCore.Qt.DisplayRole)
162 # The samples role is a dictionary that contains the old samples for each unit.
163 # Should be trimmed periodically, otherwise it grows larger and larger.
164 sample = (time.time(), value)
165 traces = item.data(MeasurementDataModel.tracesRole)
166 traces[unit].append(sample)
168 class MultimeterDelegate(QtGui.QStyledItemDelegate):
169 '''Delegate to show the data items from a MeasurementDataModel.'''
171 def __init__(self, parent, font):
172 '''Initialize the delegate.
174 :param font: Font used for the text.
177 super(self.__class__, self).__init__(parent)
181 fi = QtGui.QFontInfo(self._nfont)
182 self._nfontheight = fi.pixelSize()
184 fm = QtGui.QFontMetrics(self._nfont)
185 r = fm.boundingRect('-XX.XXXXXX X XX')
187 w = 1.4 * r.width() + 2 * self._nfontheight
188 h = 2.6 * self._nfontheight
189 self._size = QtCore.QSize(w, h)
191 def sizeHint(self, option=None, index=None):
194 def _color_rect(self, outer):
195 '''Returns the dimensions of the clickable rectangle.'''
196 x1 = (outer.height() - self._nfontheight) / 2
197 r = QtCore.QRect(x1, x1, self._nfontheight, self._nfontheight)
198 r.translate(outer.topLeft())
201 def paint(self, painter, options, index):
202 value, unit = index.data(QtCore.Qt.DisplayRole)
203 desc = index.data(MeasurementDataModel.descRole)
204 color = index.data(MeasurementDataModel.colorRole)
206 painter.setFont(self._nfont)
208 # Draw the clickable rectangle.
209 painter.fillRect(self._color_rect(options.rect), color)
212 h = options.rect.height()
213 p = options.rect.topLeft()
214 p += QtCore.QPoint(h, (h + self._nfontheight) / 2 - 2)
215 painter.drawText(p, desc + ': ' + value + ' ' + unit)
217 def editorEvent(self, event, model, options, index):
218 if type(event) is QtGui.QMouseEvent:
219 if event.type() == QtCore.QEvent.MouseButtonPress:
220 rect = self._color_rect(options.rect)
221 if rect.contains(event.x(), event.y()):
222 c = index.data(MeasurementDataModel.colorRole)
223 c = QtGui.QColorDialog.getColor(c, None,
224 'Choose new color for channel')
226 item = model.itemFromIndex(index)
227 item.setData(c, MeasurementDataModel.colorRole)