Insert QChartView to ui

Question

I am trying to put plot candlestick and 5-days average line on a same qtchart but give two x axis plot code into a UI loader

import sys
from PyQt5.QtWidgets          


        

Answer 1

It is not necessary to promote a class, although it is a valid option, so that it can be displayed in a window generated based on a .ui since you can use empty QWidget (without promoting it) as a container, then place a layout, and within the layout the QChartView.

The image shows an empty QWidget whose name is "chart_container" where the QChartView will be placed:

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     Test Trade
    
   
   
    
     
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The code is then implemented by adding the QChartView to the container through a layout:

import sys

from PyQt5 import QtCore, QtWidgets, uic, QtChart

# load both ui file
uifile_1 = "UI/main.ui"
form_1, base_1 = uic.loadUiType(uifile_1)


class Example(base_1, form_1):
    def __init__(self):
        super(base_1, self).__init__()
        self.setupUi(self)

        data = (
            (1, 7380, 7520, 7380, 7510, 7324),
            (2, 7520, 7580, 7410, 7440, 7372),
            (3, 7440, 7650, 7310, 7520, 7434),
            (4, 7450, 7640, 7450, 7550, 7480),
            (5, 7510, 7590, 7460, 7490, 7502),
            (6, 7500, 7590, 7480, 7560, 7512),
            (7, 7560, 7830, 7540, 7800, 7584),
        )

        series = QtChart.QCandlestickSeries()
        series.setDecreasingColor(QtCore.Qt.red)
        series.setIncreasingColor(QtCore.Qt.green)

        ma5 = QtChart.QLineSeries()  # 5-days average data line
        tm = []  # stores str type data

        # in a loop,  series and ma5 append corresponding data
        for num, o, h, l, c, m in data:
            series.append(QtChart.QCandlestickSet(o, h, l, c))
            ma5.append(QtCore.QPointF(num, m))
            tm.append(str(num))

        chart = QtChart.QChart()
        chart.addSeries(series)  # candle
        chart.addSeries(ma5)  # ma5 line

        chart.setAnimationOptions(QtChart.QChart.SeriesAnimations)
        chart.createDefaultAxes()
        chart.legend().hide()

        chart.axisX(series).setCategories(tm)
        chart.axisX(ma5).setVisible(False)

        chartview = QtChart.QChartView(chart)

        self.chart_container.setContentsMargins(0, 0, 0, 0)
        lay = QtWidgets.QHBoxLayout(self.chart_container)
        lay.setContentsMargins(0, 0, 0, 0)
        lay.addWidget(chartview)


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    ex = Example()
    ex.show()
    sys.exit(app.exec_())