PyQt5下拉式复选框QComboCheckBox

笔者在用PyQt5写GUI时碰到了需要使用下拉式复选框的情况,但是PyQt5中没有相应的组件,而网上找到的方法大多是qt使用的,所以不能直接拿来用。
没办法,在这种让人无奈的情况下,笔者只能根据网上大神们的方法试着自己写一个喽 。
你还别说,真就让我写出来了。(笔者是个菜鸟新手,所以这小小的成功让我很开心 )
然后笔者就很严肃地将这个组件命名为QComboCheckBox,也就是QComboBox和QCheckBox的拼接 。
废话不多说,直接先上效果图:
PyQt5下拉式复选框QComboCheckBox_第1张图片
PyQt5下拉式复选框QComboCheckBox_第2张图片
然后是代码:(第一个是基础,第二个是带全选和清空功能)
from PyQt5.QtWidgets import QComboBox,QLineEdit,QListWidget,QCheckBox,QListWidgetItem

class ComboCheckBox(QComboBox):
    def __init__(self,items):#items==[str,str...]
        super(ComboCheckBox,self).__init__()
        self.items=items
        self.qCheckBox=[]
        self.qLineEdit=QLineEdit()
        self.qLineEdit.setReadOnly(True)
        qListWidget=QListWidget()

        self.row_num=len(self.items)
        for i in range(self.row_num):
            self.qCheckBox.append(QCheckBox())
            qItem=QListWidgetItem(qListWidget)
            self.qCheckBox[i].setText(self.items[i])
            qListWidget.setItemWidget(qItem,self.qCheckBox[i])
            self.qCheckBox[i].stateChanged.connect(self.show)
        
        self.setLineEdit(self.qLineEdit)         
        self.setModel(qListWidget.model())
        self.setView(qListWidget)

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

    def show(self):
        show=''
        self.qLineEdit.setReadOnly(False)
        self.qLineEdit.clear()
        for i in self.Selectlist():
            show+=i+';'
        self.qLineEdit.setText(show)
        self.qLineEdit.setReadOnly(True)
from PyQt5.QtWidgets import QComboBox,QLineEdit,QListWidget,QCheckBox,QListWidgetItem

class ComboCheckBox(QComboBox):
    def __init__(self,items):#items==[str,str...]
        super(ComboCheckBox,self).__init__()
        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(1,self.row_num):
            self.addQCheckBox(i)
            self.qCheckBox[i].stateChanged.connect(self.show)
        self.setModel(self.qListWidget.model())
        self.setView(self.qListWidget)
        self.setLineEdit(self.qLineEdit)         

    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 show(self):
        show=''
        Outputlist=self.Selectlist()
        self.qLineEdit.setReadOnly(False)
        self.qLineEdit.clear()
        for i in Outputlist:
            show+=i+';'
        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)
使用方法:
a=ComboCheckBox('子项列表')
Selectlist()获取被选子项列表
All()全选
clear()清空已选项

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