class MainWindow(QMainWindow):
def __init__(self, device):
super(MainWindow, self).__init__()
self.series = QLineSeries()
self.chart = QChart()
self.chart.addSeries(self.series)
self.axisX = QValueAxis()
self.axisX.setRange(0, sampleCount)
self.axisX.setLabelFormat("%g")
self.axisX.setTitleText("Samples")
self.axisY = QValueAxis()
self.axisY.setRange(-1, 1)
self.axisY.setTitleText("Audio level")
self.chart.setAxisX(self.axisX, self.series)
self.chart.setAxisY(self.axisY, self.series)
self.chart.legend().hide()
self.chart.setTitle("Data from the microphone ({})".format(
device.deviceName()))
formatAudio = QAudioFormat()
formatAudio.setSampleRate(8000)
formatAudio.setChannelCount(1)
formatAudio.setSampleSize(8)
formatAudio.setCodec("audio/pcm")
formatAudio.setByteOrder(QAudioFormat.LittleEndian)
formatAudio.setSampleType(QAudioFormat.UnSignedInt)
self.audioInput = QAudioInput(device, formatAudio, self)
self.ioDevice = self.audioInput.start()
self.ioDevice.readyRead.connect(self._readyRead)
self.chartView = QChartView(self.chart)
self.setCentralWidget(self.chartView)
self.buffer = [QPointF(x, 0) for x in range(sampleCount)]
self.series.append(self.buffer)
def closeEvent(self, event):
if self.audioInput is not None:
self.audioInput.stop()
event.accept()
def _readyRead(self):
data = self.ioDevice.readAll()
availableSamples = data.size() // resolution
start = 0
if (availableSamples < sampleCount):
start = sampleCount - availableSamples
for s in range(start):
self.buffer[s].setY(self.buffer[s + availableSamples].y())
dataIndex = 0
for s in range(start, sampleCount):
value = (ord(data[dataIndex]) - 128) / 128
self.buffer[s].setY(value)
dataIndex = dataIndex + resolution
self.series.replace(self.buffer)
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 TestChart(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.set0 = QBarSet("Jane")
self.set1 = QBarSet("John")
self.set2 = QBarSet("Axel")
self.set3 = QBarSet("Mary")
self.set4 = QBarSet("Sam")
self.set0.append([1, 2, 3, 4, 5, 6])
self.set1.append([5, 0, 0, 4, 0, 7])
self.set2.append([3, 5, 8, 13, 8, 5])
self.set3.append([5, 6, 7, 3, 4, 5])
self.set4.append([9, 7, 5, 3, 1, 2])
self.barSeries = QBarSeries()
self.barSeries.append(self.set0)
self.barSeries.append(self.set1)
self.barSeries.append(self.set2)
self.barSeries.append(self.set3)
self.barSeries.append(self.set4)
self.lineSeries = QLineSeries()
self.lineSeries.setName("trend")
self.lineSeries.append(QPoint(0, 4))
self.lineSeries.append(QPoint(1, 15))
self.lineSeries.append(QPoint(2, 20))
self.lineSeries.append(QPoint(3, 4))
self.lineSeries.append(QPoint(4, 12))
self.lineSeries.append(QPoint(5, 17))
self.chart = QChart()
self.chart.addSeries(self.barSeries)
self.chart.addSeries(self.lineSeries)
self.chart.setTitle("Line and barchart example")
self.categories = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
self.axisX = QBarCategoryAxis()
self.axisX.append(self.categories)
self.chart.setAxisX(self.axisX, self.lineSeries)
self.chart.setAxisX(self.axisX, self.barSeries)
self.axisX.setRange("Jan", "Jun")
self.axisY = QValueAxis()
self.chart.setAxisY(self.axisY, self.lineSeries)
self.chart.setAxisY(self.axisY, self.barSeries)
self.axisY.setRange(0, 20)
self.chart.legend().setVisible(True)
self.chart.legend().setAlignment(Qt.AlignBottom)
self.chartView = QChartView(self.chart)
self.chartView.setRenderHint(QPainter.Antialiasing)
self.setCentralWidget(self.chartView)
class TestChart(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.series = QLineSeries()
self.series.append([
QPointF(1.0, 1.0),
QPointF(2.0, 73.0),
QPointF(3.0, 268.0),
QPointF(4.0, 17.0),
QPointF(5.0, 4325.0),
QPointF(6.0, 723.0)
])
self.chart = QChart()
self.chart.addSeries(self.series)
self.chart.legend().hide()
self.chart.setTitle("Logarithmic axis example")
self.axisX = QValueAxis()
self.axisX.setTitleText("Data point")
self.axisX.setLabelFormat("%i")
self.axisX.setTickCount(self.series.count())
self.chart.addAxis(self.axisX, Qt.AlignBottom)
self.series.attachAxis(self.axisX)
self.axisY = QLogValueAxis()
self.axisY.setTitleText("Values")
self.axisY.setLabelFormat("%g")
self.axisY.setBase(8.0)
self.axisY.setMinorTickCount(-1)
self.chart.addAxis(self.axisY, Qt.AlignLeft)
self.series.attachAxis(self.axisY)
self.chartView = QChartView(self.chart)
self.chartView.setRenderHint(QPainter.Antialiasing)
self.setCentralWidget(self.chartView)
class View(QGraphicsView):
def __init__(self, parent=None):
super(View, self).__init__(parent)
self.setScene(QGraphicsScene(self))
self.setDragMode(QGraphicsView.NoDrag)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# Chart
self._chart = QChart()
self._chart.setMinimumSize(640, 480)
self._chart.setTitle("Hover the line to show callout. Click the line "
"to make it stay")
self._chart.legend().hide()
self.series = QLineSeries()
self.series.append(1, 3)
self.series.append(4, 5)
self.series.append(5, 4.5)
self.series.append(7, 1)
self.series.append(11, 2)
self._chart.addSeries(self.series)
self.series2 = QSplineSeries()
self.series2.append(1.6, 1.4)
self.series2.append(2.4, 3.5)
self.series2.append(3.7, 2.5)
self.series2.append(7, 4)
self.series2.append(10, 2)
self._chart.addSeries(self.series2)
self._chart.createDefaultAxes()
self._chart.setAcceptHoverEvents(True)
self.setRenderHint(QPainter.Antialiasing)
self.scene().addItem(self._chart)
self._coordX = QGraphicsSimpleTextItem(self._chart)
self._coordX.setPos(self._chart.size().width() / 2 - 50,
self._chart.size().height())
self._coordX.setText("X: ")
self._coordY = QGraphicsSimpleTextItem(self._chart)
self._coordY.setPos(self._chart.size().width() / 2 + 50,
self._chart.size().height())
self._coordY.setText("Y: ")
self._callouts = []
self._tooltip = Callout(self._chart)
self.series.clicked.connect(self.keepCallout)
self.series.hovered.connect(self.tooltip)
self.series2.clicked.connect(self.keepCallout)
self.series2.hovered.connect(self.tooltip)
self.setMouseTracking(True)
def resizeEvent(self, event):
if self.scene():
self.scene().setSceneRect(QRectF(QPointF(0, 0), event.size()))
self._chart.resize(event.size())
self._coordX.setPos(self._chart.size().width() / 2 - 50,
self._chart.size().height() - 20)
self._coordY.setPos(self._chart.size().width() / 2 + 50,
self._chart.size().height() - 20)
for callout in self._callouts:
callout.updateGeometry()
QGraphicsView.resizeEvent(self, event)
def mouseMoveEvent(self, event):
pos = self._chart.mapToValue(event.position().toPoint())
x = pos.x()
y = pos.y()
self._coordX.setText(f"X: {x:.2f}")
self._coordY.setText(f"Y: {y:.2f}")
QGraphicsView.mouseMoveEvent(self, event)
def keepCallout(self):
self._callouts.append(self._tooltip)
self._tooltip = Callout(self._chart)
def tooltip(self, point, state):
if self._tooltip == 0:
self._tooltip = Callout(self._chart)
if state:
self._tooltip.setText("X: {0:.2f} \nY: {1:.2f} ".format(
point.x(), point.y()))
self._tooltip.setAnchor(point)
self._tooltip.setZValue(11)
self._tooltip.updateGeometry()
self._tooltip.show()
else:
self._tooltip.hide()
class TestChart(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.series = QLineSeries()
self.series.append(0, 6)
self.series.append(2, 4)
self.series.append(3, 8)
self.series.append(7, 4)
self.series.append(10, 5)
self.series.append(QPointF(11, 1))
self.series.append(QPointF(13, 3))
self.series.append(QPointF(17, 6))
self.series.append(QPointF(18, 3))
self.series.append(QPointF(20, 2))
self.chart = QChart()
self.chart.legend().hide()
self.chart.addSeries(self.series)
self.chart.createDefaultAxes()
self.chart.setTitle("Simple line chart example")
self.chartView = QChartView(self.chart)
self.chartView.setRenderHint(QPainter.Antialiasing)
self.setCentralWidget(self.chartView)