在多个 QTableView 上创建不同的上下文菜单

Create different context menus on several QTableViews

我在 QMainWindow 中有两个 QTableView,我想在其中一个上创建一个上下文菜单,然后在另一个上创建另一个上下文菜单。

创建上下文菜单和定义操作到目前为止有效。但是上下文菜单会在整个应用程序中随处弹出。我不知道如何将它限制为只有一个特定的 table。我认为它与 QMainWindow 的成员 contextMenuEvent() 有关,但我不知道如何更改这部分。尝试创建继承 QTableView 的自定义 class 没有成功,因为我不确定从哪里开始。

这是我尝试过的:

populate_table_1()populate_table_2() 方法仅用于将一些数据填充到 table 中。 get_selected_item_TV1() 方法从 table_1 的一行中获取必要的数据。 delete_file() 方法是从 contextMenuEvent() 方法调用删除操作时我想要执行的操作的示例。这段代码到目前为止有效,但我希望上下文菜单仅在我右键单击一行 table_1 时弹出,并且在其他地方右键单击时它根本不出现。

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



data_1 = ["file_name", "file_infos"]
data_2 = ["other_stuff_1", "other_stuff_2"]


class Ui_MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("MyApp")
        self.resize(450, 280)
        centralwidget = QWidget(self)

        #]===================================================================[#

        # table_1
        table_1 = QTableView(
            centralwidget,
            selectionBehavior=QAbstractItemView.SelectRows,
            editTriggers=QAbstractItemView.NoEditTriggers
        )
        # table_1 models
        self.modelTV1 = QStandardItemModel(0, 2, centralwidget)
        self.modelTV1.setHorizontalHeaderLabels(["column 1", "column 2"])
        table_1.setModel(self.modelTV1)

        self.selectionModelTV1 = table_1.selectionModel()

        #]===================================================================[#

        # table_2
        table_2 = QTableView(
            centralwidget,
            selectionBehavior=QAbstractItemView.SelectRows,
            editTriggers=QAbstractItemView.NoEditTriggers,
        )
        # table_2 models
        self.modelTV2 = QStandardItemModel(0, 2, centralwidget)
        self.modelTV2.setHorizontalHeaderLabels(["column 1", "column 2"])
        table_2.setModel(self.modelTV2)

        self.selectionModelTV2 = table_2.selectionModel()

        v_Layout1 = QVBoxLayout()
        v_Layout1.addWidget(table_1)
        v_Layout1.addWidget(table_2)
        gridLayout = QGridLayout(centralwidget)
        gridLayout.addLayout(v_Layout1, 0, 0, 1, 1)
        self.setCentralWidget(centralwidget)


    def populate_table_1(self):
        self.modelTV1.setRowCount(0)
        for item in data_1:
            self.modelTV1.insertRow(0)
            for i, text in enumerate(data_1):
                self.modelTV1.setItem(0, i, QStandardItem(text))


    def populate_table_2(self):
        self.modelTV2.setRowCount(0)
        for item in data_2:
            self.modelTV2.insertRow(0)
            for i, text in enumerate(data_2):
                self.modelTV2.setItem(0, i, QStandardItem(text))


    def contextMenuEvent(self, event):
        self.contextMenu = QMenu(self)
        deleteAction = QAction("Delete", self)

        self.contextMenu.addAction(deleteAction)
        deleteAction.triggered.connect(lambda: self.delete_file(event))

        self.contextMenu.popup(QCursor.pos())


    def get_selected_item_TV1(self):
        # get the row's text from the first column in table_1
        listed_items = self.selectionModelTV1.selectedRows()
        for index in listed_items:
            selected_item = index.data()
            return f"table_1 - row_{index.row()} - {selected_item}"


    def delete_file(self, event):
        item = self.get_selected_item_TV1()
        print(f"Deleting: {item}")



if __name__ == "__main__":
    import sys

    app = QApplication(sys.argv)
    mainUI = Ui_MainWindow()

    mainUI.populate_table_1()
    mainUI.populate_table_2()
    mainUI.show()

    sys.exit(app.exec_())

有很多选择:

  • 检测鼠标按下时在某个区域,比如第一个QTableView。在这种情况下,小部件必须可以在 contextMenuEvent() 中访问,因此您必须将 table_1 更改为 self.table_1,然后使用 underMouse():

    def contextMenuEvent(self, event):
        if self.table_1.underMouse():
            self.contextMenu = QMenu(self)
            deleteAction = QAction("Delete", self)
    
            self.contextMenu.addAction(deleteAction)
            deleteAction.triggered.connect(lambda: self.delete_file(event))
    
            self.contextMenu.popup(QCursor.pos())
    
  • 为每个QTableView实现contextMenuEvent方法:

    class TableView(QTableView):
        def contextMenuEvent(self, event):
            self.contextMenu = QMenu(self)
            deleteAction = QAction("Delete", self)
    
            self.contextMenu.addAction(deleteAction)
            deleteAction.triggered.connect(lambda: self.delete_file(event))
    
            self.contextMenu.popup(QCursor.pos())
    
        def get_selected_item_TV1(self):
            # get the row's text from the first column in table_1
            listed_items = self.selectionModel().selectedRows()
            for index in listed_items:
                selected_item = index.data()
                return f"table_1 - row_{index.row()} - {selected_item}"
    
        def delete_file(self, event):
            item = self.get_selected_item_TV1()
            print(f"Deleting: {item}")
    

    然后您必须将 table_1 = QTableView(... 更改为 table_1 = TableView(...

  • 另一种选择是使用 customContextMenuRequested 信号,为此您必须启用 Qt::CustomContextMenu 标志:

    table_1 = QTableView(
        centralwidget,
        selectionBehavior=QAbstractItemView.SelectRows,
        editTriggers=QAbstractItemView.NoEditTriggers,
        contextMenuPolicy=Qt.CustomContextMenu
    )
    table_1.customContextMenuRequested.connect(self.on_customContextMenuRequested)
    
    def on_customContextMenuRequested(self):
        self.contextMenu = QMenu(self)
        deleteAction = QAction("Delete", self)
    
        self.contextMenu.addAction(deleteAction)
        deleteAction.triggered.connect(lambda: self.delete_file())
    
        self.contextMenu.popup(QCursor.pos())
    
    def delete_file(self):
        item = self.get_selected_item_TV1()
        print(f"Deleting: {item}")