How to make QTableView to enter the editing mode o

问题:

Setting a Qt.ItemIsEnabled flag makes the QTableView items editable. To enter the item's editing mode the user can simply double-click it. Another way to edit the item is to select it and press a keyboard key. How to disable this second way of entering the item's editing mode?

Here is the image showing the QTableView with the item selected:

As soon as the user presses the keyboard key the selected item is already in the edit mode:

This default QTableView behavior makes it impossible to define the functions shortcuts since instead of triggering the linked-to-shortcut function the QListView's item enters the editing mode.... How to make QTableView to enter the editing mode only on the double-click?

from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys

class Model(QAbstractTableModel):
    def __init__(self, parent=None, *args):
        QAbstractTableModel.__init__(self, parent, *args)
        self.items = ['Item_A_001','Item_A_002','Item_B_001','Item_B_002']

    def rowCount(self, parent=QModelIndex()):
        return len(self.items)       
    def columnCount(self, parent=QModelIndex()):
        return 1

    def data(self, index, role):
        if not index.isValid(): return QVariant()
        elif role != Qt.DisplayRole:
            return QVariant()

        row=index.row()
        if row<len(self.items):
            return QVariant(self.items[row])
        else:
            return QVariant()
    def flags(self, index):
        return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable

class MyWindow(QWidget):
    def __init__(self, *args):
        QWidget.__init__(self, *args)

        tableModel=Model(self)               

        self.view=QTableView(self) 
        self.view.setModel(tableModel)
        self.view.horizontalHeader().setResizeMode(QHeaderView.Stretch)

        layout = QVBoxLayout(self)
        layout.addWidget(self.view)
        self.setLayout(layout)

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

回答1:

you need to reimplement the even handler keyPressEvent on your QTableView. To do so, you can create a custom QTableView class and reimplement the event handler inside it.

from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys

#Your new customized QTableView
class CustomQTableView(QTableView):    
    def __init__(self, *args, **kwargs):
        QTableView.__init__(self, *args, **kwargs) #Use QTableView constructor

    def keyPressEvent(self, event): #Reimplement the event here, in your case, do nothing
        return

class Model(QAbstractTableModel):
    def __init__(self, parent=None, *args):
        QAbstractTableModel.__init__(self, parent, *args)
        self.items = ['Item_A_001','Item_A_002','Item_B_001','Item_B_002']

    def rowCount(self, parent=QModelIndex()):
        return len(self.items)       
    def columnCount(self, parent=QModelIndex()):
        return 1

    def data(self, index, role):
        if not index.isValid(): return QVariant()
        elif role != Qt.DisplayRole:
            return QVariant()

        row=index.row()
        if row<len(self.items):
            return QVariant(self.items[row])
        else:
            return QVariant()
    def flags(self, index):
        return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable


class MyWindow(QWidget):
    def __init__(self, *args):
        QWidget.__init__(self, *args)
        print "c"
        tableModel=Model(self)               

        self.view=CustomQTableView(self) #Call your custom QTableView here
        self.view.setModel(tableModel)
        self.view.horizontalHeader().setResizeMode(QHeaderView.Stretch)

        layout = QVBoxLayout(self)
        layout.addWidget(self.view)
        self.setLayout(layout)

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

This way, the keyPressEvent is overwritten and nothing happens, but your double click event remains the same.

回答2:

I think a better solution would be setting the edit triggers you want. As QTableView inherits from QAbstractItemView you can use the void setEditTriggers(EditTriggers triggers). So the code for your custom QTableView would be like this:

from PyQt4.QtGui import QAbstractItemView, QTableView

class CustomQTableView(QTableView):    
    def __init__(self, *args):
        super().__init__(*args)
        self.setEditTriggers(QAbstractItemView.NoEditTriggers |
                             QAbstractItemView.DoubleClicked)