pyqt5 带有复选框的可多选的Combox

#pyqt5 带有复选框的可多选的Combox#

## 扩展字 QCombox

案例截图

## 代码

from PyQt5.QtWidgets import QComboBox, QLineEdit, QListWidgetItem, QListWidget, QCheckBox, \
    QApplication, QVBoxLayout, QWidget, QPushButton
import sys


# Ctrl+Alt+L 自动格式化代码
"""
# 多选Combox框1
class ComboCheckBox(QComboBox):
    def __init__(self, items: list):
        super(ComboCheckBox, self).__init__()
        self.items = ["全选"] + items  # items list
        self.box_list = []  # selected items
        self.text = QLineEdit()  # use to selected items
        self.state = 0  # use to record state
        q = QListWidget()
        for i in range(len(self.items)):
            self.box_list.append(QCheckBox())
            self.box_list[i].setText(self.items[i])
            item = QListWidgetItem(q)
            q.setItemWidget(item, self.box_list[i])
            if i == 0:
                self.box_list[i].stateChanged.connect(self.all_selected)
            else:
                self.box_list[i].stateChanged.connect(self.show_selected)
        q.setStyleSheet("font-size: 18px;  height: 35px; margin-left: 5px") # font-weight: bold;
        self.setStyleSheet("width: 300px; height: 35px; font-size: 20px;")
        self.text.setReadOnly(True)
        self.setLineEdit(self.text)
        self.setModel(q.model())
        self.setView(q)

    def all_selected(self):
        # change state
        if self.state == 0:
            self.state = 1
            for i in range(1, len(self.items)):
                self.box_list[i].setChecked(True)
        else:
            self.state = 0
            for i in range(1, len(self.items)):
                self.box_list[i].setChecked(False)
        self.show_selected()

    def get_selected(self):
        ret = []
        for i in range(1, len(self.items)):
            if self.box_list[i].isChecked():
                ret.append(self.box_list[i].text())
        return ret

    def show_selected(self):
        self.text.clear()
        ret = '; '.join(self.get_selected())
        self.text.setText(ret)




class UiMainWindow(QWidget):
    def __init__(self):
        super(UiMainWindow, self).__init__()
        self.setWindowTitle('Test')
        self.resize(600, 400)
        combo = ComboCheckBox(["Python", "Java", "Go", "C++", "JavaScript", "PHP"])
        layout = QVBoxLayout()
        layout.addWidget(combo)
        self.setLayout(layout)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    ui = UiMainWindow()
    ui.show()
    sys.exit(app.exec_())





"""
# from PyQt5.QtWidgets import QComboBox, QLineEdit, QListWidget, QCheckBox, QListWidgetItem

# # 多选Combox框2
class ComboCheckBox(QComboBox):
    def loadItems(self, items):
        self.items = items
        self.items.insert(0, '全部')
        self.row_num = len(self.items)
        self.Selectedrow_num = 0
        self.qCheckBox = []
        self.qLineEdit = QLineEdit()
        self.qLineEdit.setReadOnly(True)
        self.qListWidget = QListWidget()
        self.addQCheckBox(0)
        self.qCheckBox[0].stateChanged.connect(self.All)
        for i in range(0, self.row_num):
            self.addQCheckBox(i)
            self.qCheckBox[i].stateChanged.connect(self.showMessage)
        self.setModel(self.qListWidget.model())
        self.setView(self.qListWidget)
        self.setLineEdit(self.qLineEdit)
        # self.qLineEdit.textChanged.connect(self.printResults)

    def showPopup(self):
        #  重写showPopup方法，避免下拉框数据多而导致显示不全的问题
        select_list = self.Selectlist()  # 当前选择数据
        self.loadItems(items=self.items[1:])  # 重新添加组件
        for select in select_list:
            index = self.items[:].index(select)
            self.qCheckBox[index].setChecked(True)  # 选中组件
        return QComboBox.showPopup(self)

    def printResults(self):
        list = self.Selectlist()
        print(list)

    def addQCheckBox(self, i):
        self.qCheckBox.append(QCheckBox())
        qItem = QListWidgetItem(self.qListWidget)
        self.qCheckBox[i].setText(self.items[i])
        self.qListWidget.setItemWidget(qItem, self.qCheckBox[i])

    def Selectlist(self):
        Outputlist = []
        for i in range(1, self.row_num):
            if self.qCheckBox[i].isChecked() == True:
                Outputlist.append(self.qCheckBox[i].text())
        self.Selectedrow_num = len(Outputlist)
        return Outputlist

    def showMessage(self):
        Outputlist = self.Selectlist()
        self.qLineEdit.setReadOnly(False)
        self.qLineEdit.clear()
        show = ';'.join(Outputlist)

        if self.Selectedrow_num == 0:
            self.qCheckBox[0].setCheckState(0)
        elif self.Selectedrow_num == self.row_num - 1:
            self.qCheckBox[0].setCheckState(2)
        else:
            self.qCheckBox[0].setCheckState(1)
        self.qLineEdit.setText(show)
        self.qLineEdit.setReadOnly(True)

    def All(self, zhuangtai):
        if zhuangtai == 2:
            for i in range(1, self.row_num):
                self.qCheckBox[i].setChecked(True)
        elif zhuangtai == 1:
            if self.Selectedrow_num == 0:
                self.qCheckBox[0].setCheckState(2)
        elif zhuangtai == 0:
            self.clear()

    def clear(self):
        for i in range(self.row_num):
            self.qCheckBox[i].setChecked(False)

    def currentText(self):
        text = QComboBox.currentText(self).split(';')
        if text.__len__() == 1:
            if not text[0]:
                return []
        return text


if __name__ == '__main__':
    from PyQt5 import QtWidgets, QtCore
    import sys

    items = ['Python', 'R', 'Java', 'C++', 'CSS']

    app = QtWidgets.QApplication(sys.argv)
    Form = QtWidgets.QWidget()
    comboBox1 = ComboCheckBox(Form)
    comboBox1.setGeometry(QtCore.QRect(10, 10, 100, 20))
    comboBox1.setMinimumSize(QtCore.QSize(100, 20))
    comboBox1.loadItems(items)


    searchBtn = QPushButton(Form)
    searchBtn.clicked.connect(lambda:print(comboBox1.currentText()))

    Form.show()
    sys.exit(app.exec_())