class ChartWidget(QWidget):
def __init__(self, parent, quotes, trades, data_range, currency_name):
QWidget.__init__(self, parent)
self.setMinimumWidth(600)
self.setMinimumHeight(400)
self.quotes_series = QLineSeries()
for point in quotes: # Conversion to 'float' in order not to get 'int' overflow on some platforms
self.quotes_series.append(float(point['timestamp']),
point['quote'])
self.trade_series = QScatterSeries()
for point in trades: # Conversion to 'float' in order not to get 'int' overflow on some platforms
self.trade_series.append(float(point['timestamp']), point['price'])
self.trade_series.setMarkerSize(5)
self.trade_series.setBorderColor(CustomColor.LightRed)
self.trade_series.setBrush(CustomColor.DarkRed)
axisX = QDateTimeAxis()
axisX.setTickCount(11)
axisX.setRange(QDateTime().fromSecsSinceEpoch(data_range[0]),
QDateTime().fromSecsSinceEpoch(data_range[1]))
axisX.setFormat("yyyy/MM/dd")
axisX.setLabelsAngle(-90)
axisX.setTitleText("Date")
axisY = QValueAxis()
axisY.setTickCount(11)
axisY.setRange(data_range[2], data_range[3])
axisY.setTitleText("Price, " + currency_name)
self.chartView = QChartView()
self.chartView.chart().addSeries(self.quotes_series)
self.chartView.chart().addSeries(self.trade_series)
self.chartView.chart().addAxis(axisX, Qt.AlignBottom)
self.chartView.chart().setAxisX(axisX, self.quotes_series)
self.chartView.chart().setAxisX(axisX, self.trade_series)
self.chartView.chart().addAxis(axisY, Qt.AlignLeft)
self.chartView.chart().setAxisY(axisY, self.quotes_series)
self.chartView.chart().setAxisY(axisY, self.trade_series)
self.chartView.chart().legend().hide()
self.chartView.setViewportMargins(0, 0, 0, 0)
self.chartView.chart().layout().setContentsMargins(
0, 0, 0, 0) # To remove extra spacing around chart
self.chartView.chart().setBackgroundRoundness(
0) # To remove corner rounding
self.chartView.chart().setMargins(QMargins(
0, 0, 0, 0)) # Allow chart to fill all space
self.layout = QHBoxLayout(self)
self.layout.setContentsMargins(0, 0, 0,
0) # Remove extra space around layout
self.layout.addWidget(self.chartView)
self.setLayout(self.layout)
class Widget(QWidget):
def __init__(self):
QWidget.__init__(self)
self.setMinimumSize(800, 600)
self.donuts = []
self.chart_view = QChartView()
self.chart_view.setRenderHint(QPainter.Antialiasing)
self.chart = self.chart_view.chart()
self.chart.legend().setVisible(False)
self.chart.setTitle("Nested donuts demo")
self.chart.setAnimationOptions(QChart.AllAnimations)
self.min_size = 0.1
self.max_size = 0.9
self.donut_count = 5
self.setup_donuts()
# create main layout
self.main_layout = QGridLayout(self)
self.main_layout.addWidget(self.chart_view, 1, 1)
self.setLayout(self.main_layout)
self.update_timer = QTimer(self)
self.update_timer.timeout.connect(self.update_rotation)
self.update_timer.start(1250)
def setup_donuts(self):
for i in range(self.donut_count):
donut = QPieSeries()
slccount = randrange(3, 6)
for j in range(slccount):
value = randrange(100, 200)
slc = QPieSlice(str(value), value)
slc.setLabelVisible(True)
slc.setLabelColor(Qt.white)
slc.setLabelPosition(QPieSlice.LabelInsideTangential)
# Connection using an extra parameter for the slot
slc.hovered[bool].connect(partial(self.explode_slice, slc=slc))
donut.append(slc)
size = (self.max_size - self.min_size) / self.donut_count
donut.setHoleSize(self.min_size + i * size)
donut.setPieSize(self.min_size + (i + 1) * size)
self.donuts.append(donut)
self.chart_view.chart().addSeries(donut)
def update_rotation(self):
for donut in self.donuts:
phase_shift = randrange(-50, 100)
donut.setPieStartAngle(donut.pieStartAngle() + phase_shift)
donut.setPieEndAngle(donut.pieEndAngle() + phase_shift)
def explode_slice(self, exploded, slc):
if exploded:
self.update_timer.stop()
slice_startangle = slc.startAngle()
slice_endangle = slc.startAngle() + slc.angleSpan()
donut = slc.series()
idx = self.donuts.index(donut)
for i in range(idx + 1, len(self.donuts)):
self.donuts[i].setPieStartAngle(slice_endangle)
self.donuts[i].setPieEndAngle(360 + slice_startangle)
else:
for donut in self.donuts:
donut.setPieStartAngle(0)
donut.setPieEndAngle(360)
self.update_timer.start()
slc.setExploded(exploded)