def main():
import sys
app = QApplication(sys.argv)
set0 = QBarSet("Jane")
set1 = QBarSet("John")
set2 = QBarSet("Axel")
set3 = QBarSet("Mary")
set4 = QBarSet("Samantha")
set0 << 1 << 2 << 3 << 4 << 5 << 6
set1 << 5 << 0 << 0 << 4 << 0 << 7
set2 << 3 << 5 << 8 << 13 << 8 << 5
set3 << 5 << 6 << 7 << 3 << 4 << 5
set4 << 9 << 7 << 5 << 3 << 1 << 2
series = QBarSeries()
series.append(set0)
series.append(set1)
series.append(set2)
series.append(set3)
series.append(set4)
chart = QChart()
chart.addSeries(series)
chart.setTitle("Simple barchart example")
chart.setAnimationOptions(QChart.SeriesAnimations)
categories = ("Jan", "Feb", "Mar", "Apr", "May", "Jun")
axisX = QBarCategoryAxis()
axisX.append(categories)
chart.addAxis(axisX, Qt.AlignBottom)
series.attachAxis(axisX)
axisY = QValueAxis()
axisY.setRange(0, 15)
chart.addAxis(axisY, Qt.AlignLeft)
series.attachAxis(axisY)
chart.legend().setVisible(True)
chart.legend().setAlignment(Qt.AlignBottom)
chartView = QChartView(chart)
chartView.setRenderHint(QPainter.Antialiasing)
window = QMainWindow()
window.setCentralWidget(chartView)
window.resize(420, 300)
window.show()
sys.exit(app.exec_())
class Widget(QWidget):
def __init__(self,
device_info: QAudioDeviceInfo,
parent: QWidget = None) -> None:
super().__init__(parent)
self.m_chart = QChart()
self.m_series = QLineSeries()
chart_view = QChartView(self.m_chart)
chart_view.setMinimumSize(800, 600)
self.m_chart.addSeries(self.m_series)
axisX = QValueAxis()
axisX.setRange(0, XYSeriesIODevice.sampleCount)
axisX.setLabelFormat("%g")
axisX.setTitleText("Samples")
axisY = QValueAxis()
axisY.setRange(-1, 1)
axisY.setTitleText("Audio level")
self.m_chart.addAxis(axisX, Qt.AlignBottom)
self.m_series.attachAxis(axisX)
self.m_chart.addAxis(axisY, Qt.AlignLeft)
self.m_series.attachAxis(axisY)
self.m_chart.legend().hide()
self.m_chart.setTitle(
f"Data from the microphone ({device_info.deviceName()})")
mainLayout = QVBoxLayout(self)
mainLayout.addWidget(chart_view)
formatAudio = QAudioFormat()
formatAudio.setSampleRate(8000)
formatAudio.setChannelCount(1)
formatAudio.setSampleSize(8)
formatAudio.setCodec("audio/pcm")
formatAudio.setByteOrder(QAudioFormat.LittleEndian)
formatAudio.setSampleType(QAudioFormat.UnSignedInt)
self.m_audioInput = QAudioInput(device_info, formatAudio, self)
self.m_device = XYSeriesIODevice(self.m_series, self)
self.m_device.open(QIODevice.WriteOnly)
self.m_audioInput.start(self.m_device)