def mouseMoveEvent(self, event):
'''
Determine if the current movement is a drag. If it is, convert it into a QDrag. If the
drag ends inside the tab bar, emit an move_tab_signal. If the drag ends outside the tab
bar, emit an detach_tab_signal.
'''
# Determine if the current movement is detected as a drag
if not self.drag_start_pos.isNull() and ((event.pos() - self.drag_start_pos).manhattanLength() > QApplication.startDragDistance()):
self.drag_initiated = True
# If the current movement is a drag initiated by the left button
if ((event.buttons() & Qt.LeftButton)) and self.drag_initiated:
# Stop the move event
finishMoveEvent = QMouseEvent(QEvent.MouseMove, event.pos(), Qt.NoButton, Qt.NoButton, Qt.NoModifier)
QTabBar.mouseMoveEvent(self, finishMoveEvent)
# Convert the move event into a drag
drag = QDrag(self)
mime_data = QMimeData()
mime_data.setData('action', b'application/tab-detach')
drag.setMimeData(mime_data)
# Create the appearance of dragging the tab content
# tab_index = self.tabAt(self.drag_start_pos)
pixmap = self.parentWidget().grab()
targetPixmap = QPixmap(pixmap.size())
targetPixmap.fill(Qt.transparent)
painter = QPainter(targetPixmap)
painter.setOpacity(0.85)
painter.drawPixmap(0, 0, pixmap)
painter.end()
drag.setPixmap(targetPixmap)
# Initiate the drag
dropAction = drag.exec_(Qt.MoveAction | Qt.CopyAction)
# If the drag completed outside of the tab bar, detach the tab and move
# the content to the current cursor position
if dropAction == Qt.IgnoreAction:
event.accept()
self.detach_tab_signal.emit(self.tabAt(self.drag_start_pos), self.mouse_cursor.pos(), False)
elif dropAction == Qt.MoveAction:
# else if the drag completed inside the tab bar, move the selected tab to the new position
if not self.drag_droped_pos.isNull():
self.move_tab_signal.emit(self.tabAt(self.drag_start_pos), self.tabAt(self.drag_droped_pos))
else:
# else if the drag completed inside the tab bar new TabBar, move the selected tab to the new TabBar
self.detach_tab_signal.emit(self.tabAt(self.drag_start_pos), self.mouse_cursor.pos(), False)
event.accept()
else:
QTabBar.mouseMoveEvent(self, event)
def _event(self, e):
if e.type() == QEvent.MouseButtonPress and e.button() == Qt.LeftButton:
qDebug('%spress, rel=%s, global=%s, diff=%s' % (
(' - pseudo ' if self._releasing_and_repressing_while_dragging
else ''), e.pos(), e.globalPos(), e.globalPos() - self.pos()))
if e.type() == QEvent.MouseButtonRelease and e.button(
) == Qt.LeftButton:
qDebug('%srelease, rel=%s, global=%s, diff=%s' % (
(' - pseudo ' if self._releasing_and_repressing_while_dragging
else ''), e.pos(), e.globalPos(), e.globalPos() - self.pos()))
# store local position when pressing button before starting the custom drag'n'drop
# only allow when layout is not frozen
if self._dragging_parent is None and e.type(
) == QEvent.MouseButtonPress and e.button() == Qt.LeftButton and bool(
self.features() & QDockWidget.DockWidgetMovable):
self._dragging_local_pos = e.pos()
if self._dragging_parent is None and self._dragging_local_pos is not None and e.type(
) == QEvent.Move and QApplication.mouseButtons() & Qt.LeftButton:
if self._widget_at(e.pos()) is not None:
qDebug(
'DockWidget._event() start drag, dockwidget=%s, parent=%s, floating=%s, pos=%s'
% (str(self), str(self.parent()), str(
self.isFloating()), str(self._dragging_local_pos)))
self._dragging_parent = self.parent()
# ignore further mouse events so that the widget behind this dock widget can be determined
self.setAttribute(Qt.WA_TransparentForMouseEvents)
# collect all main windows (except self.main_window) to re-implement QApplication.widgetAt() in self._widget_at()
self._main_windows = [
self._container_manager.get_root_main_window()
]
for container in self._container_manager.get_containers():
if container == self:
continue
self._main_windows.append(container.main_window)
# unset local position when releasing button even when custom drag'n'drop has not been started
if self._dragging_local_pos is not None and e.type(
) == QEvent.MouseButtonRelease and e.button(
) == Qt.LeftButton and not self._releasing_and_repressing_while_dragging:
self._dragging_local_pos = None
if self._dragging_parent is not None and e.type(
) == QEvent.MouseButtonRelease and e.button(
) == Qt.LeftButton and not self._releasing_and_repressing_while_dragging:
qDebug(
'DockWidget._event() stop drag, dockwidget=%s, parent=%s\n' %
(self, self.parent()))
self._dragging_parent = None
self.setAttribute(Qt.WA_TransparentForMouseEvents, False)
self._main_windows = []
if self._dragging_parent is not None and e.type(
) == QEvent.MouseMove and e.buttons(
) & Qt.LeftButton and not self._releasing_and_repressing_while_dragging:
widget = self._widget_at(e.globalPos())
new_parent = self._get_new_parent(widget)
#print 'new_parent', new_parent, (new_parent.objectName() if new_parent else '')
if new_parent is not None and new_parent != self.parent():
self._releasing_and_repressing_while_dragging = True
# schedule stop of pseudo drag'n'drop and let it complete
mouse_release_event = QMouseEvent(QEvent.MouseButtonRelease,
self._dragging_local_pos,
e.globalPos(), Qt.LeftButton,
Qt.NoButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_release_event)
QApplication.sendPostedEvents()
# schedule reparent to hovered main window and let it complete
reparent_event = ReparentEvent(self, new_parent)
QApplication.instance().postEvent(self._container_manager,
reparent_event)
QApplication.sendPostedEvents()
# reenable mouse events to be able to receive upcoming pseudo mouse events
self.setAttribute(Qt.WA_TransparentForMouseEvents, False)
# schedule restart of pseudo drag'n'drop and let it complete
mouse_repress_event = QMouseEvent(QEvent.MouseButtonPress,
self._dragging_local_pos,
e.globalPos(), Qt.LeftButton,
Qt.LeftButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_repress_event)
QApplication.sendPostedEvents()
# schedule move to trigger dock widget drag'n'drop required for snapping and showing rubber band and let it complete
# move forth...
mouse_move_event = QMouseEvent(
QEvent.MouseMove, self._dragging_local_pos,
e.globalPos() +
QPoint(QApplication.startDragDistance(), 1), Qt.NoButton,
Qt.LeftButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_move_event)
QApplication.sendPostedEvents()
# ...and back
mouse_move_event = QMouseEvent(QEvent.MouseMove,
self._dragging_local_pos,
e.globalPos(), Qt.NoButton,
Qt.LeftButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_move_event)
QApplication.sendPostedEvents()
# restore attributes after repressing the button
self.setAttribute(Qt.WA_TransparentForMouseEvents)
self._releasing_and_repressing_while_dragging = False
return super(DockWidget, self).event(e)
def _event(self, e):
if e.type() == QEvent.MouseButtonPress and e.button() == Qt.LeftButton:
qDebug('%spress, rel=%s, global=%s, diff=%s' % ((' - pseudo ' if self._releasing_and_repressing_while_dragging else ''), e.pos(), e.globalPos(), e.globalPos() - self.pos()))
if e.type() == QEvent.MouseButtonRelease and e.button() == Qt.LeftButton:
qDebug('%srelease, rel=%s, global=%s, diff=%s' % ((' - pseudo ' if self._releasing_and_repressing_while_dragging else ''), e.pos(), e.globalPos(), e.globalPos() - self.pos()))
# store local position when pressing button before starting the custom drag'n'drop
# only allow when layout is not frozen
if self._dragging_parent is None and e.type() == QEvent.MouseButtonPress and e.button() == Qt.LeftButton and bool(self.features() & QDockWidget.DockWidgetMovable):
self._dragging_local_pos = e.pos()
if self._dragging_parent is None and self._dragging_local_pos is not None and e.type() == QEvent.Move and QApplication.mouseButtons() & Qt.LeftButton:
if self._widget_at(e.pos()) is not None:
qDebug('DockWidget._event() start drag, dockwidget=%s, parent=%s, floating=%s, pos=%s' % (str(self), str(self.parent()), str(self.isFloating()), str(self._dragging_local_pos)))
self._dragging_parent = self.parent()
# ignore further mouse events so that the widget behind this dock widget can be determined
self.setAttribute(Qt.WA_TransparentForMouseEvents)
# collect all main windows (except self.main_window) to re-implement QApplication.widgetAt() in self._widget_at()
self._main_windows = [self._container_manager.get_root_main_window()]
for container in self._container_manager.get_containers():
if container == self:
continue
self._main_windows.append(container.main_window)
# unset local position when releasing button even when custom drag'n'drop has not been started
if self._dragging_local_pos is not None and e.type() == QEvent.MouseButtonRelease and e.button() == Qt.LeftButton and not self._releasing_and_repressing_while_dragging:
self._dragging_local_pos = None
if self._dragging_parent is not None and e.type() == QEvent.MouseButtonRelease and e.button() == Qt.LeftButton and not self._releasing_and_repressing_while_dragging:
qDebug('DockWidget._event() stop drag, dockwidget=%s, parent=%s\n' % (self, self.parent()))
self._dragging_parent = None
self.setAttribute(Qt.WA_TransparentForMouseEvents, False)
self._main_windows = []
if self._dragging_parent is not None and e.type() == QEvent.MouseMove and e.buttons() & Qt.LeftButton and not self._releasing_and_repressing_while_dragging:
widget = self._widget_at(e.globalPos())
new_parent = self._get_new_parent(widget)
#print 'new_parent', new_parent, (new_parent.objectName() if new_parent else '')
if new_parent is not None and new_parent != self.parent():
self._releasing_and_repressing_while_dragging = True
# schedule stop of pseudo drag'n'drop and let it complete
mouse_release_event = QMouseEvent(QEvent.MouseButtonRelease, self._dragging_local_pos, e.globalPos(), Qt.LeftButton, Qt.NoButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_release_event)
QApplication.sendPostedEvents()
# schedule reparent to hovered main window and let it complete
reparent_event = ReparentEvent(self, new_parent)
QApplication.instance().postEvent(self._container_manager, reparent_event)
QApplication.sendPostedEvents()
# reenable mouse events to be able to receive upcoming pseudo mouse events
self.setAttribute(Qt.WA_TransparentForMouseEvents, False)
# schedule restart of pseudo drag'n'drop and let it complete
mouse_repress_event = QMouseEvent(QEvent.MouseButtonPress, self._dragging_local_pos, e.globalPos(), Qt.LeftButton, Qt.LeftButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_repress_event)
QApplication.sendPostedEvents()
# schedule move to trigger dock widget drag'n'drop required for snapping and showing rubber band and let it complete
# move forth...
mouse_move_event = QMouseEvent(QEvent.MouseMove, self._dragging_local_pos, e.globalPos() + QPoint(QApplication.startDragDistance(), 1), Qt.NoButton, Qt.LeftButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_move_event)
QApplication.sendPostedEvents()
# ...and back
mouse_move_event = QMouseEvent(QEvent.MouseMove, self._dragging_local_pos, e.globalPos(), Qt.NoButton, Qt.LeftButton, e.modifiers())
QApplication.instance().postEvent(self, mouse_move_event)
QApplication.sendPostedEvents()
# restore attributes after repressing the button
self.setAttribute(Qt.WA_TransparentForMouseEvents)
self._releasing_and_repressing_while_dragging = False
return super(DockWidget, self).event(e)
