[Python] How to make QTableView's drag selection behave like a QTreeView

There's a difference in behaviour between QTableView and QTreeView when it comes to selecting multiple items by dragging the mouse.

In a QTreeView you can start outside the populated area and drag over the items, and they will be selected. In a QTableView this is not not possible. In order to drag and select items you have to start dragging on an item.

Is it possible to make a QTableView behave like a QTreeView in this aspect?

Here's a little example where you can experience the difference:

from PyQt6.QtCore import QAbstractTableModel, Qt
from PyQt6.QtWidgets import QApplication, QWidget, QVBoxLayout, QTableView, QTreeView


class TModel(QAbstractTableModel):
def __init__(self):
super().__init__()
self.d = [[1, 2], [3, 4], [5, 6]]

def columnCount(self, parent=None):
return 2

def rowCount(self, parent=None):
return len(self.d)

def data(self, index, role=1):
if role == Qt.ItemDataRole.DisplayRole:
return self.d[index.row()][index.column()]
return None


class Window(QWidget):
def __init__(self):
super().__init__()
view1 = QTreeView()
view2 = QTableView()
for v in (view1, view2):
v.setSelectionMode(v.SelectionMode.ExtendedSelection)
model = TModel()
view1.setModel(model)
view2.setModel(model)

lay = QVBoxLayout(self)
lay.addWidget(view1)
lay.addWidget(view2)


app = QApplication([])
win = Window()
win.show()
app.exec()

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