def mouseMoveEvent(self, event):
# update tooltip with the tooltip of the tab under mouse cursor.
tab = self.widget_under_mouse(event)
if tab is not None:
tooltip = tab.toolTip()
if not tooltip:
try:
tooltip = tab.file.path
except AttributeError:
pass
self.setToolTip(tooltip)
# If the distance is too small then return
if (event.pos() - self._pos).manhattanLength() < \
QtWidgets.QApplication.startDragDistance():
return
# If the left button isn't pressed anymore then return
if not event.buttons() & QtCore.Qt.LeftButton:
return
drag = QtGui.QDrag(self)
data = QtCore.QMimeData()
data.tab = tab
data.widget = self
# a crude way to distinguish tab-reodering drags from other drags
data.setData("action", b"tab-reordering")
drag.setMimeData(data)
drag.setPixmap(self.tabIcon(self.tabAt(event.pos())).pixmap(32, 32))
drag.exec_()
