PyQt5 ComboBox - 如何在不影响下拉列表的情况下设置 CurrentText 的颜色?

问题描述

以下代码段正确设置了 ComboBox 下拉列表中各个条目的颜色.但是，当一个项目被选中并转移到 CurrentText 字段时，下拉列表中的所有条目将更改为 CurrentText 的颜色.如何转移条目的颜色以显示为 CurrentText 不影响下拉列表?

The following snippet correctly sets the colors of individual entries in the ComboBox dropdown list. However, when an item is selected and transferred to the CurrentText field, all of the entries in the dropdown change to the color of CurrentText. How do I transfer the color of an entry to be displayed as CurrentText without affecting the dropdown list?

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

class ComboDemo(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):

        def combo_changed():
            for color in ('red', 'green', 'blue'):
                if color == cb.currentText():
                    cb.setStyleSheet('color: {}'.format(color))

        grid = QGridLayout()
        cb = QComboBox()
        grid.addWidget(cb, 0, 0)
        model = cb.model()
        for color in ('red', 'green', 'blue'):
            entry = QStandardItem(color)
            entry.setForeground(QColor(color))
            model.appendRow(entry)

        cb.currentIndexChanged.connect(combo_changed)

        self.setLayout(grid)
        self.show()

app = QApplication(sys.argv)
c = ComboDemo()
app.exec_()

推荐答案

你必须使用QComboBox:editable:

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

class ComboDemo(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):

        def combo_changed():
            for color in ('red', 'green', 'blue'):
                if color == cb.currentText():
                    cb.setStyleSheet("QComboBox:editable{{ color: {} }}".format(color))

        grid = QGridLayout()
        cb = QComboBox()
        grid.addWidget(cb, 0, 0)
        model = cb.model()
        for color in ('red', 'green', 'blue'):
            entry = QStandardItem(color)
            entry.setForeground(QColor(color))
            model.appendRow(entry)

        cb.currentIndexChanged.connect(combo_changed)
        self.setLayout(grid)
        self.show()

app = QApplication(sys.argv)
c = ComboDemo()
app.exec_()

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