How not to display all x axis coordinate labels pyqt5

最后都变了- 提交于 2020-06-23 14:20:24

问题


From time to time I returned to the code that eyllanesc helped me with.

Need to display every 6 placemarks on the axis. It would also be better to display datetime(date)

[datetime.date(1991, 2, 4) datetime.date(1991, 2, 5)
 datetime.date(1991, 2, 6) ... datetime.date(2019, 7, 31)
 datetime.date(2019, 8, 1) datetime.date(2019, 8, 2)]

instead of indexes

(0, 1, 2, 3....70)

When displaying datetime data in C#, I used string data, since on weekends datetime was also displayed and empty spaces on the axis Y were obtained. Python will probably have the same data datetime problems. The data file is located here file

I displayed what I wanted to do in the image.

P.S. Made the code shorter for better understanding.

from PyQt5 import QtCore, QtGui, QtWidgets, QtChart
from PyQt5.QtCore import Qt
import math
import numpy as np
import pandas as pd

df = pd.read_csv('file.txt',
                         index_col='DATE',
                         parse_dates=True,
                         infer_datetime_format=True)


date = df.iloc[:, 0].index.date
o = df.iloc[:, 0].values
h = df.iloc[:, 1].values
l = df.iloc[:, 2].values
z = df.iloc[:, 3].values
x = len(z)
x_ = x - 1

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.step = 30
        self._chart_view = QtChart.QChartView()
        self.scrollbar = QtWidgets.QScrollBar(
            QtCore.Qt.Horizontal,
            sliderMoved=self.onAxisSliderMoved,
            pageStep=self.step,
        )


        self.scrollbar.setRange(0, x_)

        central_widget = QtWidgets.QWidget()
        self.setCentralWidget(central_widget)

        lay = QtWidgets.QVBoxLayout(central_widget)
        for w in (self._chart_view, self.scrollbar):
            lay.addWidget(w)

        self._chart = QtChart.QChart()
        self._candlestick_serie = QtChart.QCandlestickSeries()
        self._candlestick_serie.setDecreasingColor(Qt.red)
        self._candlestick_serie.setIncreasingColor(Qt.green)

        tm = []

        for i in range(0, len(z)):
            o_ = o[i]
            h_ = h[i]
            l_ = l[i]
            c_ = z[i]
            self._candlestick_serie.append(QtChart.QCandlestickSet(o_, h_, l_, c_))
            tm.append(str(i))

        min_x, max_x = 0, x_

        self._chart.addSeries(self._candlestick_serie)
        self._chart.createDefaultAxes()
        self._chart.legend().hide()
        self._chart.axisX(self._candlestick_serie).setCategories(tm)
        self._chart_view.setChart(self._chart)
        self.lims = np.array([min_x, max_x])
        self.onAxisSliderMoved(self.scrollbar.value())
        self.adjust_axes(1, 30)


    def adjust_axes(self, value_min, value_max):
        if value_min > 0 and value_max > 0 and value_max <= x_ and value_max > value_min:
            self._chart.axisX(self._candlestick_serie).setRange(str(value_min), str(value_max))

    @QtCore.pyqtSlot(int)
    def onAxisSliderMoved(self, value):
        value2 = value + self.step
        value1 = value
        if value2 >= x_:
            value2 = x_
            value1 = value2 - self.step
        self.adjust_axes(math.floor(value1), math.ceil(value2))



if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

I tried to determine the axes separately, but nothing comes out. Code below.

from PyQt5 import QtCore, QtGui, QtWidgets, QtChart
from PyQt5.QtCore import Qt
from PyQt5.QtChart import *
import math
import numpy as np
import pandas as pd
import datetime

df = pd.read_csv('file.txt',
                         index_col='DATE',
                         parse_dates=True,
                         infer_datetime_format=True)


date = df.iloc[:, 0].index.date
o = df.iloc[:, 0].values
h = df.iloc[:, 1].values
l = df.iloc[:, 2].values
z = df.iloc[:, 3].values
x = len(z)
x_ = x - 1

qt = [None] * x
for i in range(0, x):
   qt[i] = (date[i].strftime("%Y/%m/%d"))


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.step = 30
        self._chart_view = QtChart.QChartView()
        self.scrollbar = QtWidgets.QScrollBar(
            QtCore.Qt.Horizontal,
            sliderMoved=self.onAxisSliderMoved,
            pageStep=self.step,
        )


        self.scrollbar.setRange(0, x_)

        central_widget = QtWidgets.QWidget()
        self.setCentralWidget(central_widget)

        lay = QtWidgets.QVBoxLayout(central_widget)
        for w in (self._chart_view, self.scrollbar):
            lay.addWidget(w)

        self._chart = QtChart.QChart()
        self._candlestick_serie = QtChart.QCandlestickSeries()

        for i in range(0, len(z)):
            o_ = o[i]
            h_ = h[i]
            l_ = l[i]
            c_ = z[i]
            _time = qt[i]
            self._candlestick_serie.append(QtChart.QCandlestickSet(o_, h_, l_, c_, _time))

        min_x, max_x = 0, x_

        self._chart.addSeries(self._candlestick_serie)
        self._chart.legend().hide()
        #self._chart.createDefaultAxes()


        axisX = QDateTimeAxis()
        axisX.setTickCount(5)
        axisX.setFormat("dd.MM.yyyy")
        self._chart.addAxis(axisX, Qt.AlignBottom)
        self._candlestick_serie.attachAxis(axisX)

        # Y Axis Settings
        axisY = QValueAxis()
        axisY.setLabelFormat("%i")
        self._chart.addAxis(axisY, Qt.AlignLeft)
        self._candlestick_serie.attachAxis(axisY)


        self._chart_view.setChart(self._chart)
        self.lims = np.array([min_x, max_x])
        self.onAxisSliderMoved(self.scrollbar.value())
        self.adjust_axes(1, 31)
        #self._chart.axisX(self._candlestick_serie).setTickCount(7)


    def adjust_axes(self, value_min, value_max):
        if value_min > 0 and value_max > 0 and value_max <= x_ and value_max > value_min:
            self._chart.axisX(self._candlestick_serie).setRange(str(value_min), str(value_max))

    @QtCore.pyqtSlot(int)
    def onAxisSliderMoved(self, value):
        value2 = value + self.step
        value1 = value
        if value2 >= x_:
            value2 = x_
            value1 = value2 - self.step
        self.adjust_axes(math.floor(value1), math.ceil(value2))


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

Matplotlib has an example where string values are set instead of indexes enter link description here

来源:https://stackoverflow.com/questions/62204034/how-not-to-display-all-x-axis-coordinate-labels-pyqt5

易学教程内所有资源均来自网络或用户发布的内容,如有违反法律规定的内容欢迎反馈
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!