## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
-import collections
+import itertools
+import math
import qtcompat
import sigrok.core as sr
-import time
import util
+try:
+ from itertools import izip
+except ImportError:
+ izip = zip
+
QtCore = qtcompat.QtCore
QtGui = qtcompat.QtGui
+class Trace(object):
+ '''Class to hold the measured samples.'''
+
+ def __init__(self):
+ self.samples = []
+ self.new = False
+
+ def append(self, sample):
+ self.samples.append(sample)
+ self.new = True
+
class MeasurementDataModel(QtGui.QStandardItemModel):
'''Model to hold the measured values.'''
'''Role used to store the device vendor and model.'''
descRole = QtCore.Qt.UserRole + 2
- '''Role used to store past samples.'''
- samplesRole = QtCore.Qt.UserRole + 3
+ '''Role used to store a dictionary with the traces.'''
+ tracesRole = QtCore.Qt.UserRole + 3
+
+ '''Role used to store the color to draw the graph of the channel.'''
+ colorRole = QtCore.Qt.UserRole + 4
def __init__(self, parent):
super(self.__class__, self).__init__(parent)
# idRole holds tuples, and using them to sort doesn't work.
self.setSortRole(MeasurementDataModel.descRole)
- # Used in 'format_value()' to check against.
- self.inf = float('inf')
+ # A generator for the colors of the channels.
+ self._colorgen = self._make_colorgen()
+
+ def _make_colorgen(self):
+ cols = [
+ QtGui.QColor(0x8F, 0x52, 0x02), # brown
+ QtGui.QColor(0x73, 0xD2, 0x16), # green
+ QtGui.QColor(0xCC, 0x00, 0x00), # red
+ QtGui.QColor(0x34, 0x65, 0xA4), # blue
+ QtGui.QColor(0xF5, 0x79, 0x00), # orange
+ QtGui.QColor(0xED, 0xD4, 0x00), # yellow
+ QtGui.QColor(0x75, 0x50, 0x7B) # violet
+ ]
+
+ def myrepeat(g, n):
+ '''Repeats every element from 'g' 'n' times'.'''
+ for e in g:
+ for f in itertools.repeat(e, n):
+ yield f
+
+ colorcycle = itertools.cycle(cols)
+ darkness = myrepeat(itertools.count(100, 10), len(cols))
+
+ for c, d in izip(colorcycle, darkness):
+ yield QtGui.QColor(c).darker(d)
def format_mqflags(self, mqflags):
if sr.QuantityFlag.AC in mqflags:
return ''
def format_value(self, mag):
- if mag == self.inf:
+ if math.isinf(mag):
return u'\u221E'
return '{:f}'.format(mag)
item = QtGui.QStandardItem()
item.setData(uid, MeasurementDataModel.idRole)
item.setData(desc, MeasurementDataModel.descRole)
- item.setData(collections.defaultdict(list), MeasurementDataModel.samplesRole)
+ item.setData({}, MeasurementDataModel.tracesRole)
+ item.setData(next(self._colorgen), MeasurementDataModel.colorRole)
self.appendRow(item)
self.sort(0)
return item
- @QtCore.Slot(object, object, object)
- def update(self, device, channel, data):
+ @QtCore.Slot(float, sr.classes.Device, sr.classes.Channel, tuple)
+ def update(self, timestamp, device, channel, data):
'''Update the data for the device (+channel) with the most recent
measurement from the given payload.'''
# The samples role is a dictionary that contains the old samples for each unit.
# Should be trimmed periodically, otherwise it grows larger and larger.
- sample = (time.time(), value)
- d = item.data(MeasurementDataModel.samplesRole)
- d[unit].append(sample)
+ if not math.isinf(value) and not math.isnan(value):
+ sample = (timestamp, value)
+ traces = item.data(MeasurementDataModel.tracesRole)
+
+ # It's not possible to use 'collections.defaultdict' here, because
+ # PySide doesn't return the original type that was passed in.
+ if not (unit in traces):
+ traces[unit] = Trace()
+ traces[unit].append(sample)
+
+ item.setData(traces, MeasurementDataModel.tracesRole)
+
+ def clear_samples(self):
+ '''Removes all old samples from the model.'''
+ for row in range(self.rowCount()):
+ idx = self.index(row, 0)
+ self.setData(idx, {},
+ MeasurementDataModel.tracesRole)
class MultimeterDelegate(QtGui.QStyledItemDelegate):
'''Delegate to show the data items from a MeasurementDataModel.'''
def __init__(self, parent, font):
'''Initialize the delegate.
- :param font: Font used for the description text, the value is drawn
- with a slightly bigger and bold variant of the font.
+ :param font: Font used for the text.
'''
super(self.__class__, self).__init__(parent)
self._nfont = font
- self._bfont = QtGui.QFont(self._nfont)
-
- self._bfont.setBold(True)
- if self._bfont.pixelSize() != -1:
- self._bfont.setPixelSize(self._bfont.pixelSize() * 1.2)
- else:
- self._bfont.setPointSizeF(self._bfont.pointSizeF() * 1.2)
fi = QtGui.QFontInfo(self._nfont)
self._nfontheight = fi.pixelSize()
- fm = QtGui.QFontMetrics(self._bfont)
+ fm = QtGui.QFontMetrics(self._nfont)
r = fm.boundingRect('-XX.XXXXXX X XX')
- self._size = QtCore.QSize(r.width() * 1.4, r.height() * 2.2)
- # Values used to calculate the positions of the strings in the
- # 'paint()' function.
- self._space_width = fm.boundingRect('_').width()
- self._value_width = fm.boundingRect('-XX.XXXXXX').width()
+ w = 1.4 * r.width() + 2 * self._nfontheight
+ h = 2.6 * self._nfontheight
+ self._size = QtCore.QSize(w, h)
def sizeHint(self, option=None, index=None):
return self._size
+ def _color_rect(self, outer):
+ '''Returns the dimensions of the clickable rectangle.'''
+ x1 = (outer.height() - self._nfontheight) / 2
+ r = QtCore.QRect(x1, x1, self._nfontheight, self._nfontheight)
+ r.translate(outer.topLeft())
+ return r
+
def paint(self, painter, options, index):
value, unit = index.data(QtCore.Qt.DisplayRole)
desc = index.data(MeasurementDataModel.descRole)
+ color = index.data(MeasurementDataModel.colorRole)
painter.setFont(self._nfont)
+
+ # Draw the clickable rectangle.
+ painter.fillRect(self._color_rect(options.rect), color)
+
+ # Draw the text
+ h = options.rect.height()
p = options.rect.topLeft()
- p += QtCore.QPoint(self._nfontheight, 2 * self._nfontheight)
+ p += QtCore.QPoint(h, (h + self._nfontheight) / 2 - 2)
painter.drawText(p, desc + ': ' + value + ' ' + unit)
+
+ def editorEvent(self, event, model, options, index):
+ if type(event) is QtGui.QMouseEvent:
+ if event.type() == QtCore.QEvent.MouseButtonPress:
+ rect = self._color_rect(options.rect)
+ if rect.contains(event.x(), event.y()):
+ c = index.data(MeasurementDataModel.colorRole)
+ c = QtGui.QColorDialog.getColor(c, None,
+ 'Choose new color for channel')
+ if c.isValid():
+ # False if cancel is pressed (resulting in a black
+ # color).
+ item = model.itemFromIndex(index)
+ item.setData(c, MeasurementDataModel.colorRole)
+
+ return True
+
+ return False
projects / sigrok-meter.git / blobdiff