根据 QCombobox 中选择的选项替换复选框

Question

我正在尝试自动填充排他复选框的列表，其中复选框的数量根据 QComboBox 中选择的选项而变化。

我被困在如何删除布局中最初附加的小部件并用新的小部件替换它们的部分。

例如，如果选择菜单项 -food，则会显示 3 个复选框（'good2eat'、'macs'、'popeyes'），如果选择了drinks，则这 3 个复选框将被删除，并且替换为“水”、“茶”选项

class MenuWindow(QtGui.QWidget):
    def __init__(self, dict_items, parent=None):
        super(MenuWindow, self).__init__(parent=parent)

        layout = QtGui.QVBoxLayout()
        self.checkbox_options = {}
        self.menu_tag_dict = defaultdict(set)

        self.menu_combos = QtGui.QComboBox()
        self.menu_combos.currentIndexChanged.connect(self.get_selections)
        self.chkbox_group = QtGui.QButtonGroup()

        for menu_name, submenu_name in dict_items.items():
            self.menu_combos.addItems([menu_name])

            if submenu_name:
                sub_txt = [m for m in submenu_name]
                for s in sub_txt:
                    sub_chk = QtGui.QCheckBox(s)
                    self.checkbox_options[menu_name] = sub_chk
                    self.chkbox_group.addButton(sub_chk)

        print_btn = QtGui.QPushButton('Print selected')

        layout.addWidget(self.menu_combos)
        for s in self.checkbox_options.values():
            layout.addWidget(s)

        layout.addWidget(get_sel_btn)
        layout.addStretch()

        self.setLayout(layout)
        self.show()

    def get_selections(self):
        # Get combobox text
        combo_text = self.menu_combos.currentText()
        # get the menus
        items = self.menu_combos.get(combo_text)



my_items = {
    'food' : ['good2eat', 'macs', 'popeyes'],
    'drinks': ['water', 'tea']
}

myWin = MenuWindow(my_items)
myWin.show()

即便如此，在代码开头，菜单项food下填充的选项数量已经是错误的了。

有没有更好的方法来处理这个问题？？

Answer 1

试试看：

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

class MenuWindow(QWidget):
    def __init__(self, dict_items, parent=None):
        super(MenuWindow, self).__init__(parent=parent)

        self.dict_items = dict_items

        self.menu_combos = QComboBox()
        self.menu_combos.currentIndexChanged[str].connect(self.get_selections)
        self.menu_combos.addItems(sorted(self.dict_items.keys()))

        print_btn = QPushButton('Print selected')        # ! Print selected
        print_btn.clicked.connect(self.printSelected)    # ! Print selected

        self.layoutV = QVBoxLayout()
        self.layoutV.addWidget(self.menu_combos)

        for s in self.dict_items[self.menu_combos.currentText()]:
            self.sub_chk = QCheckBox(s)
            self.layoutV.addWidget(self.sub_chk)    

        self.layoutV.addStretch()
        self.layoutV.addWidget(print_btn)                # ! Print selected

        self.setLayout(self.layoutV)
        self.show()

    @pyqtSlot(str)
    def get_selections(self, text):

        if self.layout():
            countLayout = self.layout().count()
            for it in range(countLayout - 3):             # <--- removeWidget
                w = self.layout().itemAt(1).widget()
                self.layout().removeWidget(w)     
                w.hide()

            for s in self.dict_items[text][::-1]:         # <--- insertWidge
                self.sub_chk = QCheckBox(s)
                self.layoutV.insertWidget(1, self.sub_chk) 

    def printSelected(self):                              # ! Print selected
        checked_list = []
        for i in range(1, self.layoutV.count() - 2):
            chBox = self.layoutV.itemAt(i).widget()
            if chBox.isChecked():
                checked_list.append(chBox.text())
        print("selected QCheckBox: " + str(list(checked_list)))  


my_items = {
    'food'  : ['good2eat', 'macs', 'popeyes'],
    'drinks': ['water',    'tea']
}

if __name__ == '__main__':
    import sys
    app  = QApplication(sys.argv)
    myWin = MenuWindow(my_items)
    myWin.setGeometry(300, 150, 250, 250)
    myWin.show()
    sys.exit(app.exec_())