如何能够在 QListWidgets 之间拖放项目并且仍然能够使用拖放进行排序
How to be able to drag and drop items between QListWidgets and still be able to sort using drag and drop
我继承了两个 QListView 类,一个 SourceListWidget
和 AcceptListWidget
我希望能够将项目从 SourceListWidget
复制到 AcceptListWidget
并且仍然能够使用拖放在 AcceptListWidget
中对它们进行排序。
在下面的代码中,除了 AcceptListWidget
无法使用拖放进行排序外,一切都按照我想要的方式进行。另外我想知道是否有办法从 SourceListWidget
中插入一个项目到 AcceptListWidget
而不是仅仅将它附加到末尾。
import sys
from PyQt5.QtWidgets import QApplication, QWidget, \
QVBoxLayout, QListWidget, QAbstractItemView
from PyQt5.QtGui import QDragMoveEvent, QDropEvent
from PyQt5.QtCore import Qt, QMimeData
import typing
class AcceptListWidget(QListWidget):
def __init__(self):
super().__init__()
self.setDefaultDropAction(Qt.MoveAction)
self.setDragDropMode(QAbstractItemView.InternalMove)
self.setAcceptDrops(True)
def dragEnterEvent(self, e: QDragMoveEvent) -> None:
e.accept()
def dragMoveEvent(self, e: QDragMoveEvent) -> None:
e.accept()
def mimeTypes(self) -> typing.List[str]:
return ['text/json']
def mimeData(self, indexes) -> QMimeData:
drag_data = indexes[0].text()
mime_data = QMimeData()
mime_data.setText(drag_data)
return mime_data
def dropEvent(self, event: QDropEvent) -> None:
event.setDropAction(Qt.CopyAction) if event.source() != self else event.setDropAction(Qt.MoveAction)
if event.source() != self:
self.addItem(event.mimeData().text())
class SourceListWidget(QListWidget):
def __init__(self):
super().__init__()
self.setDragDropMode(QAbstractItemView.DragDrop)
def dragMoveEvent(self, e: QDragMoveEvent) -> None:
e.accept() if e.source() != self else e.ignore()
def mimeTypes(self) -> typing.List[str]:
return ['text/json']
def mimeData(self, indexes) -> QMimeData:
drag_data = indexes[0].text()
mime_data = QMimeData()
mime_data.setText(drag_data)
return mime_data
def dropMimeData(self, index: int, data: QMimeData, action: Qt.DropAction) -> bool:
print('dropMimeData')
drop_data = data.data('text')
for item in drop_data:
if item in self.stringList():
self.removeRow(self.stringList().index(item))
return True
def dragEnterEvent(self, e):
e.accept()
def dropEvent(self, event: QDropEvent) -> None:
event.setDropAction(Qt.MoveAction)
event.accept()
class Widget(QWidget):
def __init__(self, parent=None):
QWidget.__init__(self, parent)
self.widget_layout = QVBoxLayout()
self.accept_widget = AcceptListWidget()
self.accept_widget.setFlow(QListWidget.LeftToRight)
# Create ListWidget and add 10 items to move around.
self.list_widget = SourceListWidget()
self.list_widget.setFlow(QListWidget.LeftToRight)
for x in range(1, 11):
self.list_widget.addItem('Item {:02d}'.format(x))
for x in range(1, 2):
self.accept_widget.addItem('Item {:02d}'.format(x))
self.widget_layout.addWidget(self.accept_widget)
self.widget_layout.addWidget(self.list_widget)
self.setLayout(self.widget_layout)
if __name__ == '__main__':
app = QApplication(sys.argv)
widget = Widget()
widget.show()
sys.exit(app.exec_())
我要修复的主要方面是 AcceptListWidget
的内部排序,但是如果可以将项目放入从 SourceListWidget
到 AcceptListWidget
的某些位置,那将是更好。
默认情况下,QListWidget 接受项目的重新排序,因此您只需在源为外部时调用父级的方法:
def dropEvent(self, event: QDropEvent) -> None:
if event.source() is self:
super().dropEvent(event)
else:
event.setDropAction(Qt.CopyAction)
self.addItem(event.mimeData().text())
我继承了两个 QListView 类,一个 SourceListWidget
和 AcceptListWidget
我希望能够将项目从 SourceListWidget
复制到 AcceptListWidget
并且仍然能够使用拖放在 AcceptListWidget
中对它们进行排序。
在下面的代码中,除了 AcceptListWidget
无法使用拖放进行排序外,一切都按照我想要的方式进行。另外我想知道是否有办法从 SourceListWidget
中插入一个项目到 AcceptListWidget
而不是仅仅将它附加到末尾。
import sys
from PyQt5.QtWidgets import QApplication, QWidget, \
QVBoxLayout, QListWidget, QAbstractItemView
from PyQt5.QtGui import QDragMoveEvent, QDropEvent
from PyQt5.QtCore import Qt, QMimeData
import typing
class AcceptListWidget(QListWidget):
def __init__(self):
super().__init__()
self.setDefaultDropAction(Qt.MoveAction)
self.setDragDropMode(QAbstractItemView.InternalMove)
self.setAcceptDrops(True)
def dragEnterEvent(self, e: QDragMoveEvent) -> None:
e.accept()
def dragMoveEvent(self, e: QDragMoveEvent) -> None:
e.accept()
def mimeTypes(self) -> typing.List[str]:
return ['text/json']
def mimeData(self, indexes) -> QMimeData:
drag_data = indexes[0].text()
mime_data = QMimeData()
mime_data.setText(drag_data)
return mime_data
def dropEvent(self, event: QDropEvent) -> None:
event.setDropAction(Qt.CopyAction) if event.source() != self else event.setDropAction(Qt.MoveAction)
if event.source() != self:
self.addItem(event.mimeData().text())
class SourceListWidget(QListWidget):
def __init__(self):
super().__init__()
self.setDragDropMode(QAbstractItemView.DragDrop)
def dragMoveEvent(self, e: QDragMoveEvent) -> None:
e.accept() if e.source() != self else e.ignore()
def mimeTypes(self) -> typing.List[str]:
return ['text/json']
def mimeData(self, indexes) -> QMimeData:
drag_data = indexes[0].text()
mime_data = QMimeData()
mime_data.setText(drag_data)
return mime_data
def dropMimeData(self, index: int, data: QMimeData, action: Qt.DropAction) -> bool:
print('dropMimeData')
drop_data = data.data('text')
for item in drop_data:
if item in self.stringList():
self.removeRow(self.stringList().index(item))
return True
def dragEnterEvent(self, e):
e.accept()
def dropEvent(self, event: QDropEvent) -> None:
event.setDropAction(Qt.MoveAction)
event.accept()
class Widget(QWidget):
def __init__(self, parent=None):
QWidget.__init__(self, parent)
self.widget_layout = QVBoxLayout()
self.accept_widget = AcceptListWidget()
self.accept_widget.setFlow(QListWidget.LeftToRight)
# Create ListWidget and add 10 items to move around.
self.list_widget = SourceListWidget()
self.list_widget.setFlow(QListWidget.LeftToRight)
for x in range(1, 11):
self.list_widget.addItem('Item {:02d}'.format(x))
for x in range(1, 2):
self.accept_widget.addItem('Item {:02d}'.format(x))
self.widget_layout.addWidget(self.accept_widget)
self.widget_layout.addWidget(self.list_widget)
self.setLayout(self.widget_layout)
if __name__ == '__main__':
app = QApplication(sys.argv)
widget = Widget()
widget.show()
sys.exit(app.exec_())
我要修复的主要方面是 AcceptListWidget
的内部排序,但是如果可以将项目放入从 SourceListWidget
到 AcceptListWidget
的某些位置,那将是更好。
默认情况下,QListWidget 接受项目的重新排序,因此您只需在源为外部时调用父级的方法:
def dropEvent(self, event: QDropEvent) -> None:
if event.source() is self:
super().dropEvent(event)
else:
event.setDropAction(Qt.CopyAction)
self.addItem(event.mimeData().text())