值更改时更改颜色组合框

如何解决值更改时更改颜色组合框

我在带有组合框的Pyqt5中有一个表。我的组合框有2个值：True或False，我想用2种不同的颜色更改Combobox的颜色：当值为True->绿色时，当值为False->红色时。我尝试使用样式表更改颜色，但只能将整个组合框更改为红色或绿色，如下所示：

如何根据其值来更改2种不同颜色的组合框？

我的代码如下：

# -*- coding: utf-8 -*-
"""
Created on Tue Oct 27 09:21:24 2020

@author: actnmk
"""

import sys
from PyQt5.QtWidgets import (QWidget,QLabel,QLineEdit,QTextEdit,QGridLayout,QApplication)
import pandas as pd
import numpy as np
import PyQt5 
from PyQt5.QtWidgets import QVBoxLayout,QPushButton,QGroupBox,QHBoxLayout,QMainWindow,QApplication,QFileDialog,QTableWidget,QTableWidgetItem,QTableView,QStyledItemDelegate
from PyQt5 import QtCore,QtGui,QtWidgets   
import os
from PyQt5.QtWidgets import (QWidget,QVBoxLayout,QApplication)
from PyQt5.QtGui import QIcon
import re

def dataframe():
    lst = [['tom','reacher','True'],['krish','pete',['nick','wilson',['juli','williams','True']] 
    df = pd.DataFrame(lst,columns =['FName','LName','Student?'],dtype = float) 
    return df

class Delegate(QtWidgets.QItemDelegate):
    def __init__(self,owner,choices):
        super().__init__(owner)
        self.items = choices

    def createEditor(self,parent,option,index):
        self.editor = QtWidgets.QComboBox(parent)
        self.editor.currentIndexChanged.connect(self.commit_editor)
        self.editor.addItems(self.items)
        return self.editor    

    def paint(self,painter,index):
        value = index.data(QtCore.Qt.DisplayRole)
        style = QtWidgets.QApplication.style()
        opt = QtWidgets.QStyleOptionComboBox()
        opt.text = str(value)
        opt.rect = option.rect
        style.drawComplexControl(QtWidgets.QStyle.CC_ComboBox,opt,painter)
        QtWidgets.QItemDelegate.paint(self,index)

    def commit_editor(self):      ####test
        editor = self.sender()
        self.commitData.emit(editor)


    def setEditorData(self,editor,index):
        value = index.data(QtCore.Qt.DisplayRole)
        num = self.items.index(value)
        editor.setCurrentIndex(num)

    def setModelData(self,model,index):
        value = editor.currentText()
        model.setData(index,value,QtCore.Qt.EditRole)

    def updateEditorGeometry(self,index):
        editor.setGeometry(option.rect)


class PandasModel(QtCore.QAbstractTableModel):
    def __init__(self,data,parent=None):
        QtCore.QAbstractTableModel.__init__(self,parent)
        self._data = data

    def rowCount(self,parent=None):
        return self._data.shape[0]

    def columnCount(self,parent=None):
        return self._data.shape[2]

    def flags(self,index):
        return QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable

    def data(self,index,role=QtCore.Qt.DisplayRole):
        if index.isValid():
            if role == QtCore.Qt.DisplayRole:
                return str(self._data.iloc[index.row(),index.column()])
        return None

    def headerData(self,col,orientation,role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            return self._data.columns[col]
        return None

    def setData(self,role=QtCore.Qt.EditRole):
        self._data.iloc[index.row(),index.column()] = value
        return True 

class MyWindow(QWidget):

    def __init__(self):
        super().__init__()
        self.setGeometry(300,200,600,400)
        self.setWindowTitle('Test')
        self.initUI()


    def show_data(self):
        choices = ['True','False']
        self.model = PandasModel(dataframe())
        self.table_data.setModel(self.model)                            
        self.table_data.setItemDelegateForColumn(2,Delegate(self,choices))
        ##make combo boxes editable with a single-click:
        for row in range(5):  
            self.table_data.openPersistentEditor(self.model.index(row,2))

    def print_data(self):
        print(self.table_data.model()._data)

    def initUI(self):

        welcom = QLabel('Welcome to my app!')

        self.btn_print_data = QPushButton('print data')
        self.btn_print_data.clicked.connect(self.print_data)  ##test

        self.btn_show_table = QPushButton('show data')
        self.btn_show_table.clicked.connect(self.show_data)

        self.table_data = QTableView()
        #self.table_result = QTableView()

        hbox1 = QHBoxLayout()
        hbox1.addWidget(welcom)


        vbox2 = QVBoxLayout()
        vbox2.addWidget(self.btn_show_table)
        vbox2.addWidget(self.btn_print_data) ####test

        vbox3 = QVBoxLayout()
        vbox3.addWidget(self.table_data)
        #vbox3.addWidget(self.table_result)

        hbox2 = QHBoxLayout()
        hbox2.addLayout(vbox2)
        hbox2.addLayout(vbox3)

        vbox1 = QVBoxLayout()
        vbox1.addLayout(hbox1)
        vbox1.addLayout(hbox2)

        self.setLayout(vbox1)
        self.show()
        
style = '''
     


        QComboBox
    {
    background-color : lightgreen;
    }
'''
if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setStyleSheet(style)
    ex = MyWindow()
    sys.exit(app.exec_())

解决方法

注意：代码中有错误，您必须更改为：

def columnCount(self,parent=None):
    return self._data.shape[1]

另一方面，解决方案是根据选择更改每个组合框的Qt StyleSheet：

def commit_editor(self):
    editor = self.sender()
    color = QtGui.QColor()
    if editor.currentText() == "True":
        color = QtGui.QColor("lightgreen")
    elif editor.currentText() == "False":
        color = QtGui.QColor("red")
    qss = """QComboBox{background-color : %s;}""" % (color.name(),)
    editor.setStyleSheet(qss)
    self.commitData.emit(editor)