更改组合框选项以修改图形/图表

Posted 2023-03-30

【中文标题】更改组合框选项以修改图形/图表

【英文标题】：Change combobox option to modificate graphic/chart

【发布时间】：2020-07-26 16:51:26

【问题描述】：

我正在使用 PyQt5 构建一个用户界面来显示来自“curve_fit”方法的数据。

由于我正在处理的数据可能存在不连续性，因此我从该方法返回的数据被划分为曲线切片。

我的 GUI 由两个图形和一个组合框组成。组合框的作用是使用户能够选择图表将显示哪个切片。 虽然组合框的事件有效，但我的图表还是一样，没有任何修改。

main.py

import sys
from PyQt5 import QtWidgets
import numpy as np

from mainwindow import Ui_MainWindow
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self,
                 initial_curve_x_value, initial_curve_y_value,
                 fit_curve_x_value_list, fit_curve_y_value_list,
                 fit_curve_error_value_list, fit_curve_zero_list,
                 fit_parameter_list, fit_square_R_list,
                 parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)

        self.initial_curve_x_value = initial_curve_x_value
        self.initial_curve_y_value = initial_curve_y_value
        self.fit_curve_x_value_list = fit_curve_x_value_list
        self.fit_curve_y_value_list = fit_curve_y_value_list
        self.fit_curve_error_value_list = fit_curve_error_value_list
        self.fit_curve_zero_list = fit_curve_zero_list
        self.fit_parameter_list = fit_parameter_list
        self.fit_square_R_list = fit_square_R_list

        rangecombobox = len(fit_square_R_list)
        itenscombobox = ["Slice " + str(i+1) for i in range(rangecombobox)]
        self.combobox.addItems(itenscombobox)
        #setting as initial value in chart as the first slice
        initial = 0
        x_test = self.initial_curve_x_value[initial]
        y_test = self.initial_curve_y_value[initial]
        x2_test = self.fit_curve_x_value_list[initial]
        y2_test = self.fit_curve_y_value_list[initial]
        error_y = self.fit_curve_error_value_list[initial]
        zero_y = self.fit_curve_zero_list[initial]

        self.static_ax1.plot(x_test, y_test)
        self.static_ax1.plot(x2_test, y2_test)

        self.static_ax2.plot(x2_test, error_y)
        self.static_ax2.plot(x2_test, zero_y)

        self.combobox.currentIndexChanged.connect(self.changePlot)

    def changePlot(self):
        combobox_index = self.combobox.currentIndex()

        self.static_ax1.clear()
        self.static_ax2.clear()

        #updating the values
        x_test = self.initial_curve_x_value[combobox_index]
        y_test = self.initial_curve_y_value[combobox_index]
        x2_test = self.fit_curve_x_value_list[combobox_index]
        y2_test = self.fit_curve_y_value_list[combobox_index]
        error_y = self.fit_curve_error_value_list[combobox_index]
        zero_y = self.fit_curve_zero_list[combobox_index]

        #updating the charts
        self.static_ax1.plot(x_test, y_test)
        self.static_ax1.plot(x2_test, y2_test)

        self.static_ax2.plot(x2_test, error_y)
        self.static_ax2.plot(x2_test, zero_y)

x1_1 = [i for i in range(10)]
x1_1 = np.array(x1_1)
x1_2 = [i for i in range(10, 20,1)]
x1_2 = np.array(x1_2)


y1_1 = [i for i in range(10, 20,1)]
y1_1 = np.array(y1_1)
y1_2 = [i for i in range(20, 30,1)]
y1_2 = np.array(y1_2)
y1_3 = [i for i in range(30, 40,1)]
y1_3 = np.array(y1_3)
y1_4 = [i for i in range(40, 50,1)]
y1_4 = np.array(y1_4)
y1_5 = [i for i in range(20, 30,1)]
y1_5 = np.array(y1_5)
y1_6 = [i for i in range(30, 40,1)]
y1_6 = np.array(y1_6)

initial_curve_x_value = []
initial_curve_x_value.append(x1_1)
initial_curve_x_value.append(x1_2)

initial_curve_y_value = []
initial_curve_y_value.append(y1_1)
initial_curve_y_value.append(y1_2)

fit_curve_x_value_list = []
fit_curve_x_value_list.append(x1_1)
fit_curve_x_value_list.append(x1_2)

fit_curve_y_value_list = []
fit_curve_y_value_list.append(y1_3)
fit_curve_y_value_list.append(y1_4)

fit_curve_error_value_list = []
fit_curve_error_value_list.append(y1_5)
fit_curve_error_value_list.append(y1_6)

fit_curve_zero_list = []
zero = np.zeros(10)
fit_curve_zero_list.append(zero)
fit_curve_zero_list.append(zero)

fit_parameter_list = [[1, 2, 4], [2,3]]
fit_square_R_list = [0.99, 0.98]

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    mw = MainWindow(initial_curve_x_value, initial_curve_y_value,
                    fit_curve_x_value_list, fit_curve_y_value_list,
                    fit_curve_error_value_list, fit_curve_zero_list,
                    fit_parameter_list, fit_square_R_list
                    )
    mw.show()
    sys.exit(app.exec_())

主窗口.py

from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QLabel, QComboBox
from PyQt5.QtCore import QRect

from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from matplotlib.figure import Figure
import sys

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        length_window = 1200
        height_window = 1200
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(length_window, height_window)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

        self.combobox = QComboBox(MainWindow)
        self.combobox.setGeometry(QRect(900, 80, 250, 40))

        self.chart1 = QtWidgets.QWidget(MainWindow)
        self.chart1.setGeometry(QRect(50, 50, 800, 400))
        self.layout_chart1 = QtWidgets.QVBoxLayout(self.chart1)
        self.static_canvas1 = FigureCanvasQTAgg(Figure(figsize=(8,4)))
        self.layout_chart1.addWidget(self.static_canvas1)

        self.chart2 = QtWidgets.QWidget(MainWindow)
        self.chart2.setGeometry(QRect(50, 450, 800, 400))
        self.layout_chart2 = QtWidgets.QVBoxLayout(self.chart2)
        self.static_canvas2 = FigureCanvasQTAgg(Figure(figsize=(8,4)))
        self.layout_chart2.addWidget(self.static_canvas2)

        self.static_ax1 = self.static_canvas1.figure.subplots()
        self.static_ax2 = self.static_canvas2.figure.subplots()

【问题讨论】：

我做了一些更改，现在可以重现了。谢谢

【参考方案1】：

你必须使用画布的draw()方法来更新绘画：

def changePlot(self):
    # ...

    self.static_ax2.plot(x2_test, error_y)
    self.static_ax2.plot(x2_test, zero_y)

    self.static_canvas1.draw()
    self.static_canvas2.draw()

【讨论】：

我之前尝试过这种方法，但使用的是“static_ax'i'”。现在它真的起作用了，谢谢你:)