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如何返回或打印 QlistWidget 中所有选中的项目？

我可以打印选定的项目，但我想要打印选中的项目

所以我想检查项目是否被检查，如果是，系统会将检查的项目附加到列表中，最后打印这个列表。

下面的代码包括 GUI 部分和功能：

  • 加载文件
  • 显示标题
  • 显示检查项目

代码：

    from PyQt5 import QtCore, QtGui, QtWidgets
    
    import pandas as pd
    
    from PandasModel import PandasModel
    
    import seaborn as sns
    import cufflinks as cf
    import plotly
    import plotly.offline as py
    import plotly.express as px 
    import plotly.graph_objs as go
    from plotly.offline.offline import iplot
    cf.go_offline()
    cf.set_config_file(offline=False, world_readable=True)
    
    
    class Widget(QtWidgets.QWidget):
        def __init__(self, parent=None):
            QtWidgets.QWidget.__init__(self, parent=None)
            self.gridLayout_3 = QtWidgets.QGridLayout(self)
            self.gridLayout_3.setObjectName("gridLayout_3")
           
            self.gridLayout_2 = QtWidgets.QGridLayout()
            self.gridLayout_2.setObjectName("gridLayout_2")
           
            self.gridLayout = QtWidgets.QGridLayout()
            self.gridLayout.setObjectName("gridLayout")
            
            self.pathLE = QtWidgets.QLineEdit(self)
            self.gridLayout_2.addWidget(self.pathLE, 0, 1, 1, 1)
            
    
            
            self.loadBtn = QtWidgets.QPushButton("Select File", self)
            self.loadBtn.clicked.connect(self.loadFile)
            self.gridLayout_2.addWidget(self.loadBtn, 0, 0, 1, 1)
            self.gridLayout_3.addLayout(self.gridLayout_2, 0, 0, 1, 4)
    
           
            self.displayHeader = QtWidgets.QPushButton("Display header", self)
            self.displayHeader.clicked.connect(lambda: self.print_df_header(self.df))
            self.gridLayout.addWidget(self.displayHeader, 2, 0, 1, 1)
            
            self.displayDF_checked_header = QtWidgets.QPushButton("Print checked item", self)
            self.displayDF_checked_header.clicked.connect(lambda: self.setItems(self.df))
            self.gridLayout.addWidget(self.displayDF_checked_header, 5, 0, 1, 1)
       

            
            self.header_list = QtWidgets.QListWidget(self)
            self.header_list.setObjectName("listWidget")
            self.header_list.itemSelectionChanged.connect(self.selectionChanged)
            self.gridLayout_3.addWidget(self.header_list, 1, 2, 1, 1)
       

            self.pandasTv = QtWidgets.QTableView(self)
            self.verticalLayout.addWidget(self.pandasTv)
    
            self.pandasTv.setSortingEnabled(True)
    
    
         def loadFile(self):
            fileName, _ = QtWidgets.QFileDialog.getOpenFileName(self, "Open File", "", "CSV Files (*.csv)");
            self.pathLE.setText(fileName)
            df = pd.read_csv(fileName)
            model = PandasModel(df)
            self.pandasTv.setModel(model)
            self.df = df
    
         def print_df_header(self,df):
            savelist = list(self.df)
            for item in savelist:
                qitem = QtWidgets.QListWidgetItem ( ) 
                qitem.setText ( item ) 
                qitem.setCheckState ( QtCore.Qt.Unchecked ) 
                self.header_list.addItem ( qitem )
            print(savelist)

         def setItems(self, item):
            self.items=[]
            if item.checkState() == QtCore.Qt.Checked:
              self.items.append(item)
              print(self.items.append(item))
        
            if item.checkState() == QtCore.Qt.Unchecked:
              self.items.remove(item)

# this function allow to print the selected items
         def selectionChanged(self):
            print("Selected items: ", self.header_list.selectedItems())
    
    if __name__ == "__main__":
        import sys
        app = QtWidgets.QApplication(sys.argv)
        w = Widget()
        w.show()
        sys.exit(app.exec_())
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1 回答 1

1

您需要循环浏览所有项目并检查它们checkState()：

def selectionChanged(self):
    checked = []
    for row in range(self.header_list.count()):
        item = self.header_list.item(row)
        if item.checkState():
            checked.append(item)
    print("Checked items: ", ", ".join(i.text() for i in checked))
于 2020-09-04T12:08:10.270 回答