如何在QItemDelegate和QTableView中使用QWidget

Question

点击QTableView中的项目会显示由QWidget QItemDelegate方法创建的createEditor()。 问题是QWidget偏离了QTableView窗口，并且它浮动在桌面的某个地方（在我桌面的角落）。如何确保QWidget方法创建的createEditor已正确定位？

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

app = QApplication([])


class PopupView(QWidget):
    def __init__(self, parent=None):
        super(PopupView, self).__init__(parent)
        self.setWindowFlags(Qt.Popup)
        self.move(QCursor.pos())
        self.show()


class ItemDelegate(QItemDelegate):
    def __init__(self, parent):
        QItemDelegate.__init__(self, parent)

    def createEditor(self, parent, option, index):
        return PopupView(parent)


class Model(QAbstractTableModel):
    def __init__(self):
        QAbstractTableModel.__init__(self)
        self.items = [[1, 'one', 'ONE'], [2, 'two', 'TWO'], [3, 'three', 'THREE']]

    def flags(self, index):
        return Qt.ItemIsEnabled | Qt.ItemIsEditable

    def rowCount(self, parent=QModelIndex()):
        return 3

    def columnCount(self, parent=QModelIndex()):
        return 3

    def data(self, index, role):
        if not index.isValid():
            return

        if role in [Qt.DisplayRole, Qt.EditRole]:
            return self.items[index.row()][index.column()]


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        QMainWindow.__init__(self, parent)
        self.clipboard = QApplication.clipboard()
        mainWidget = QWidget()
        self.setCentralWidget(mainWidget)
        mainWidget.setLayout(QVBoxLayout())

        view = QTableView()
        view.setModel(Model())
        view.setItemDelegate(ItemDelegate(view))
        self.layout().addWidget(view)


view = MainWindow()
view.show()
app.exec_()

Answer 1

执行此操作的正确方法是重新实现委托的updateEditorGeometry方法，该方法允许您以任何方式自定义编辑器的几何。然后，您的编辑器和委托类将简化为：

class PopupView(QWidget):
    def __init__(self, parent=None):
        super(PopupView, self).__init__(parent)
        self.setWindowFlags(Qt.Popup)

class ItemDelegate(QItemDelegate):
    def __init__(self, parent):
        super(ItemDelegate, self).__init__(parent)

    def createEditor(self, parent, option, index):
        return PopupView(parent)

    def updateEditorGeometry(self, editor, option, index):
        editor.move(QCursor.pos())