def mouseMoveEvent(self, event):
"""Drag and drop layer with mouse movement.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
position = np.array([event.pos().x(), event.pos().y()])
distance = np.linalg.norm(position - self._drag_start_position)
if (distance < QApplication.startDragDistance()
or self._drag_name is None):
return
mimeData = QMimeData()
mimeData.setText(self._drag_name)
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
drag.exec_()
# Check if dragged layer still exists or was deleted during drag
names = [layer.name for layer in self.layers]
dragged_layer_exists = self._drag_name in names
if self._drag_name is not None and dragged_layer_exists:
index = self.layers.index(self._drag_name)
layer = self.layers[index]
self._ensure_visible(layer)
def mouseMoveEvent(self, event):
distance = (event.pos() - self.dragStartPosition).manhattanLength()
if distance < QApplication.startDragDistance():
return
mimeData = QMimeData()
if not self.layer.selected:
name = self.layer.name
else:
name = ''
for layer in self.layer.viewer.layers:
if layer.selected:
name = layer.name + '; ' + name
name = name[:-2]
mimeData.setText(name)
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
dropAction = drag.exec_(Qt.MoveAction | Qt.CopyAction)
if dropAction == Qt.CopyAction:
if not self.layer.selected:
index = self.layer.viewer.layers.index(self.layer)
self.layer.viewer.layers.pop(index)
else:
self.layer.viewer.layers.remove_selected()
def mouseMoveEvent(self, event):
from qtpy.QtCore import QMimeData, QByteArray
from qtpy.QtGui import QPixmap, QDrag
if not (event.button() != Qt.LeftButton
and isinstance(self.dragLabel, QLabel)):
return
if (event.pos() - self.dragStartPosition
).manhattanLength() < QApplication.startDragDistance():
return
axis_index = self.filters_layout.indexOf(self.dragLabel) // 2
# prepare hotSpot, mimeData and pixmap objects
mimeData = QMimeData()
mimeData.setText(self.dragLabel.text())
mimeData.setData("application/x-axis-index",
QByteArray.number(axis_index))
pixmap = QPixmap(self.dragLabel.size())
self.dragLabel.render(pixmap)
# prepare drag object
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setPixmap(pixmap)
drag.setHotSpot(event.pos() - self.dragStartPosition)
drag.exec_(Qt.MoveAction | Qt.CopyAction, Qt.CopyAction)
def mouseMoveEvent(self, event):
position = np.array([event.pos().x(), event.pos().y()])
distance = np.linalg.norm(position - self.drag_start_position)
if (distance < QApplication.startDragDistance()
or self.drag_name is None):
return
mimeData = QMimeData()
mimeData.setText(self.drag_name)
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
dropAction = drag.exec_()
def mouseMoveEvent(self, event):
position = np.array([event.pos().x(), event.pos().y()])
distance = np.linalg.norm(position - self.drag_start_position)
if (distance < QApplication.startDragDistance()
or self.drag_name is None):
return
mimeData = QMimeData()
mimeData.setText(self.drag_name)
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
drag.exec_()
if self.drag_name is not None:
index = self.layers.index(self.drag_name)
layer = self.layers[index]
self._ensure_visible(layer)
def drag_with_pixmap(list_widget: QListWidget) -> QDrag:
"""Create a QDrag object with a pixmap of the currently select list item.
This method is useful when you have a QListWidget that displays custom
widgets for each QListWidgetItem instance in the list (usually by calling
``QListWidget.setItemWidget(item, widget)``). When used in a
``QListWidget.startDrag`` method, this function creates a QDrag object that
shows an image of the item being dragged (rather than an empty rectangle).
Parameters
----------
list_widget : QListWidget
The QListWidget for which to create a QDrag object.
Returns
-------
QDrag
A QDrag instance with a pixmap of the currently selected item.
Examples
--------
>>> class QListWidget:
... def startDrag(self, supportedActions):
... drag = drag_with_pixmap(self)
... drag.exec_(supportedActions, Qt.MoveAction)
"""
drag = QDrag(list_widget)
drag.setMimeData(list_widget.mimeData(list_widget.selectedItems()))
size = list_widget.viewport().visibleRegion().boundingRect().size()
pixmap = QPixmap(size)
pixmap.fill(Qt.transparent)
painter = QPainter(pixmap)
for index in list_widget.selectedIndexes():
rect = list_widget.visualRect(index)
painter.drawPixmap(rect, list_widget.viewport().grab(rect))
painter.end()
drag.setPixmap(pixmap)
drag.setHotSpot(list_widget.viewport().mapFromGlobal(QCursor.pos()))
return drag
