选择与复选框的交互式交互

Question

我有一个弹出窗口，在其中读取选项列表并将其填充到组框和复选框中。

我有一个选项，其中包含以下数据：my_selection = {'drinks': ['coffee'], 'snacks': ['m&m']}，我正在尝试获取选项 - 在弹出窗口中检查coffee和-m&m。

然而，我的选择可能会有所不同，这意味着，itemA可能有drinksitems，如果我选择itemB（itemA不再在选择中），它可能有一个来自drinks的项目和snacks中的两个项目我想要确保如果有相同的项目命名但是在不同的类别或反之，则检查正确的选项。

我尝试将选择案例插入到类中，如下所示：

class FormWindow(QtGui.QWidget):
    def __init__(self, main_items, my_selection, parent=None, callback=None):
        ...
        if my_selection:
            for k, v in my.items():
                for i in v:
                    if sub_chk.text() == i:
                        sub_chk.setChecked(True)

它只检查它找到的最新项目，在这种情况下，只考虑Snacks中的项目。

import sys
from PyQt4 import QtGui, QtCore
from collections import defaultdict


class FormWindow(QtGui.QWidget):
    def __init__(self, main_items, parent=None, callback=None):
        super(FormWindow, self).__init__(parent=parent)
        self.callback = callback

        layout = QtGui.QVBoxLayout()
        self.checkbox_options = []
        self.menu_tag_dict = defaultdict(set)

        for main_name, sub_name in main_items.items():
            # Set the main item
            groupbox = QtGui.QGroupBox(self)
            groupbox.setTitle(main_name.title())
            groupbox.setLayout(QtGui.QVBoxLayout())
            layout.addWidget(groupbox)

            if sub_name:
                # sub_txt = [(action.text()) for action in sub_name]
                sub_txt = [action for action in sub_name]

                # Creates QCheckbox for each option
                for s in sub_txt:
                    sub_chk = QtGui.QCheckBox(s)
                    self.checkbox_options.append(sub_chk)
                    groupbox.layout().addWidget(sub_chk)

        layout.addStretch()

        self.setLayout(layout)
        self.setWindowTitle('Form Checking')
        self.show()



if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    main_items = {'drinks': ['coffee', 'tea', 'water'], 'snacks': ['biscuits', 'm&m']}
    my_win = FormWindow(main_items)
    sys.exit(app.exec_())

# Example1 of what my selection will return
my_selection = {'drinks': ['coffee'], 'snacks': ['m&m']}

# Example2 of what my selection will return
my_selection = {'drinks': ['water', 'coffee'], 'snacks': ['biscuits']}

Answer 1

假设您想要获取已检查的项目，那么您应该做的是通过根据已检查的状态删除或添加选择来反映数据，在下面的示例中，如果您按下按钮，则选中物品将被打印：

import sys
from PyQt4 import QtGui, QtCore
from functools import partial


class FormWindow(QtGui.QWidget):
    checkbox_options_changed = QtCore.pyqtSignal(dict)

    def __init__(self, main_items, parent=None, callback=None):
        super(FormWindow, self).__init__(parent=parent)
        self.callback = callback

        layout = QtGui.QVBoxLayout(self)
        self.checkbox_options = {}

        for main_name, sub_name in main_items.items():
            groupbox = QtGui.QGroupBox()
            groupbox.setTitle(main_name.title())
            lay = QtGui.QVBoxLayout(groupbox)
            layout.addWidget(groupbox)
            self.checkbox_options[main_name] = set()
            for s in sub_name:
                sub_chk = QtGui.QCheckBox(s)
                info = (main_name, s)
                wrapper = partial(self.on_stateChanged, info)
                sub_chk.stateChanged.connect(wrapper)
                lay.addWidget(sub_chk)
        layout.addStretch()
        self.setWindowTitle("Form Checking")

    @QtCore.pyqtSlot(tuple, QtCore.Qt.CheckState)
    def on_stateChanged(self, info, state):
        name, item = info
        option = self.checkbox_options[name]
        if state == QtCore.Qt.Checked:
            option.add(item)
        else:
            if item in option:
                option.remove(item)
        self.checkbox_options_changed.emit(self.checkbox_options)

    def get_checked_items(self):
        return self.checkbox_options


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    main_items = {
        "drinks": ["coffee", "tea", "water"],
        "snacks": ["biscuits", "m&m"],
    }
    my_win = FormWindow(main_items)
    w = QtGui.QWidget()
    lay = QtGui.QVBoxLayout(w)
    button = QtGui.QPushButton("Print me")
    lay.addWidget(button)
    lay.addWidget(my_win)

    def on_clicked():
        print(my_win.get_checked_items())

    button.clicked.connect(on_clicked)
    my_win.checkbox_options_changed.connect(print)
    w.show()
    sys.exit(app.exec_())

{'drinks': {'coffee', 'tea'}, 'snacks': set()}

{'drinks': {'coffee', 'tea'}, 'snacks': {'biscuits'}}