X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=datamodel.py;h=83d5ef60df7080c225215eb1cc299e87f311de7a;hb=911ab26ebbbc1021f35643e92150cf12895c2574;hp=d6b1443f5e9962f2cb0811eebca3045d3a780d20;hpb=f76b9df824276da861bbbdde658deb8130ea8541;p=sigrok-meter.git diff --git a/datamodel.py b/datamodel.py index d6b1443..83d5ef6 100644 --- a/datamodel.py +++ b/datamodel.py @@ -18,15 +18,31 @@ ## 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.''' @@ -36,8 +52,11 @@ class MeasurementDataModel(QtGui.QStandardItemModel): '''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) @@ -46,8 +65,31 @@ class MeasurementDataModel(QtGui.QStandardItemModel): # 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: @@ -58,7 +100,7 @@ class MeasurementDataModel(QtGui.QStandardItemModel): return '' def format_value(self, mag): - if mag == self.inf: + if math.isinf(mag): return u'\u221E' return '{:f}'.format(mag) @@ -91,13 +133,14 @@ class MeasurementDataModel(QtGui.QStandardItemModel): 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.''' @@ -114,9 +157,24 @@ class MeasurementDataModel(QtGui.QStandardItemModel): # 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.''' @@ -124,41 +182,63 @@ class MultimeterDelegate(QtGui.QStyledItemDelegate): 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