PyQt5 可拖动图标从列表视图到另一个
PyQt5 draggable icons from a listview to another
我很难将图标从列表视图（ViewMode 设置为 IconMode）拖放到另一个列表视图。它类似于我在 docs 中找到的内容。
场景：用户将 QIcon 1 从 ListView 1 拖放到 ListView 2。ListView 2 应该将 QIcon 1 添加到它的模型中。此外，当 specific QIcon 添加到 ListView 2 时，我想做一些后台工作。我怎么知道 QIcon 1 被删除到 ListView 2 而不是 QIcon 2？
主窗口（设置布局，将图像加载到列表视图 1）：
class Ui_MainWindow(object):
...
def loadImages(self):
model = QStandardItemModel()
images = Path("images").glob("*.*")
for image in images:
item = QStandardItem()
item.setIcon(QIcon(str(image)))
model.appendRow(item)
self.listView1.setModel(model)
列表视图 1：
class ListView1(QListView):
def __init__(self):
super().__init__()
self.setAcceptDrops(False)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.setIconSize(QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QAbstractItemView.DragOnly)
列表视图 2：
class ListView2(QListView):
def __init__(self):
super().__init__()
self.setViewMode(QtWidgets.QListView.IconMode)
self.setDragDropMode(QAbstractItemView.DropOnly)
self.setIconSize(QSize(50, 50))
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
event.accept()
def dragMoveEvent(self, event):
event.accept()
def dropEvent(self, event):
event.accept()
event.setDropAction(QtCore.Qt.MoveAction)
event.acceptProposedAction()
如何将图标从列表视图 1 拖放到列表视图 2 并访问其属性？
没有必要覆盖 dragEnterEvent、dragMoveEvent 或 dropEvent，因为这些实现已经存在并且可以正常工作，您指出的示例是针对没有实现这些事件的其他类型的小部件。
from pathlib import Path
from PyQt5 import QtCore, QtGui, QtWidgets
class LListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(LListView, self).__init__(parent)
self.model = QtGui.QStandardItemModel(self)
self.setModel(self.model)
self.setAcceptDrops(False)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DragOnly)
class RListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(RListView, self).__init__(parent)
self.model = QtGui.QStandardItemModel(self)
self.setModel(self.model)
self.setAcceptDrops(True)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DropOnly)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
central_widget = QtWidgets.QWidget()
self.l_view = LListView()
self.r_view = RListView()
self.setCentralWidget(central_widget)
lay = QtWidgets.QHBoxLayout(central_widget)
lay.addWidget(self.l_view)
lay.addWidget(self.r_view)
self.loadImages()
def loadImages(self):
images = Path("images").glob("*.*")
for image in images:
item = QtGui.QStandardItem()
item.setIcon(QtGui.QIcon(str(image)))
self.l_view.model.appendRow(item)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
更新：
如果你想添加一个标识符，这可以通过你在创建项目时传递的角色来完成，然后在 dropEvent() 中获取所有角色，然后通过它获取你想要的角色标识符：
from pathlib import Path
from PyQt5 import QtCore, QtGui, QtWidgets
class LListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(LListView, self).__init__(parent)
self.m_model = QtGui.QStandardItemModel(self)
self.setModel(self.m_model)
self.setAcceptDrops(False)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DragOnly)
class RListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(RListView, self).__init__(parent)
self.m_model = QtGui.QStandardItemModel(self)
self.setModel(self.m_model)
self.setAcceptDrops(True)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DropOnly)
def dropEvent(self, event):
last_row_count = self.model().rowCount()
super(RListView, self).dropEvent(event)
# check if an item is added
if self.model().rowCount() > last_row_count:
md = event.mimeData()
fmt = "application/x-qabstractitemmodeldatalist"
if md.hasFormat(fmt):
encoded = md.data(fmt)
stream = QtCore.QDataStream(encoded, QtCore.QIODevice.ReadOnly)
datas = []
item = {}
while not stream.atEnd():
row = stream.readInt32()
column = stream.readInt32()
map_items = stream.readInt32()
for i in range(map_items):
key = stream.readInt32()
value = QtCore.QVariant()
stream >> value
item[QtCore.Qt.ItemDataRole(key)] = value
datas.append(item)
for data in datas:
identifier = data[QtCore.Qt.UserRole+1].value()
print("identifier: ", identifier)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
central_widget = QtWidgets.QWidget()
self.l_view = LListView()
self.r_view = RListView()
self.setCentralWidget(central_widget)
lay = QtWidgets.QHBoxLayout(central_widget)
lay.addWidget(self.l_view)
lay.addWidget(self.r_view)
self.loadImages()
def loadImages(self):
images = Path("images").glob("*.*")
for i, image in enumerate(images):
item = QtGui.QStandardItem()
identifier = "img_{:06d}".format(i+1)
item.setData(identifier, QtCore.Qt.UserRole+1)
item.setIcon(QtGui.QIcon(str(image)))
self.l_view.m_model.appendRow(item)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
我很难将图标从列表视图（ViewMode 设置为 IconMode）拖放到另一个列表视图。它类似于我在 docs 中找到的内容。
场景：用户将 QIcon 1 从 ListView 1 拖放到 ListView 2。ListView 2 应该将 QIcon 1 添加到它的模型中。此外，当 specific QIcon 添加到 ListView 2 时，我想做一些后台工作。我怎么知道 QIcon 1 被删除到 ListView 2 而不是 QIcon 2？
主窗口（设置布局，将图像加载到列表视图 1）：
class Ui_MainWindow(object):
...
def loadImages(self):
model = QStandardItemModel()
images = Path("images").glob("*.*")
for image in images:
item = QStandardItem()
item.setIcon(QIcon(str(image)))
model.appendRow(item)
self.listView1.setModel(model)
列表视图 1：
class ListView1(QListView):
def __init__(self):
super().__init__()
self.setAcceptDrops(False)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.setIconSize(QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QAbstractItemView.DragOnly)
列表视图 2：
class ListView2(QListView):
def __init__(self):
super().__init__()
self.setViewMode(QtWidgets.QListView.IconMode)
self.setDragDropMode(QAbstractItemView.DropOnly)
self.setIconSize(QSize(50, 50))
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
event.accept()
def dragMoveEvent(self, event):
event.accept()
def dropEvent(self, event):
event.accept()
event.setDropAction(QtCore.Qt.MoveAction)
event.acceptProposedAction()
如何将图标从列表视图 1 拖放到列表视图 2 并访问其属性？
没有必要覆盖 dragEnterEvent、dragMoveEvent 或 dropEvent，因为这些实现已经存在并且可以正常工作，您指出的示例是针对没有实现这些事件的其他类型的小部件。
from pathlib import Path
from PyQt5 import QtCore, QtGui, QtWidgets
class LListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(LListView, self).__init__(parent)
self.model = QtGui.QStandardItemModel(self)
self.setModel(self.model)
self.setAcceptDrops(False)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DragOnly)
class RListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(RListView, self).__init__(parent)
self.model = QtGui.QStandardItemModel(self)
self.setModel(self.model)
self.setAcceptDrops(True)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DropOnly)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
central_widget = QtWidgets.QWidget()
self.l_view = LListView()
self.r_view = RListView()
self.setCentralWidget(central_widget)
lay = QtWidgets.QHBoxLayout(central_widget)
lay.addWidget(self.l_view)
lay.addWidget(self.r_view)
self.loadImages()
def loadImages(self):
images = Path("images").glob("*.*")
for image in images:
item = QtGui.QStandardItem()
item.setIcon(QtGui.QIcon(str(image)))
self.l_view.model.appendRow(item)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
更新：
如果你想添加一个标识符，这可以通过你在创建项目时传递的角色来完成，然后在 dropEvent() 中获取所有角色，然后通过它获取你想要的角色标识符：
from pathlib import Path
from PyQt5 import QtCore, QtGui, QtWidgets
class LListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(LListView, self).__init__(parent)
self.m_model = QtGui.QStandardItemModel(self)
self.setModel(self.m_model)
self.setAcceptDrops(False)
self.setViewMode(QtWidgets.QListView.IconMode)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DragOnly)
class RListView(QtWidgets.QListView):
def __init__(self, parent=None):
super(RListView, self).__init__(parent)
self.m_model = QtGui.QStandardItemModel(self)
self.setModel(self.m_model)
self.setAcceptDrops(True)
self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.setIconSize(QtCore.QSize(50, 50))
self.setResizeMode(QtWidgets.QListView.Adjust)
self.setDragDropMode(QtWidgets.QAbstractItemView.DropOnly)
def dropEvent(self, event):
last_row_count = self.model().rowCount()
super(RListView, self).dropEvent(event)
# check if an item is added
if self.model().rowCount() > last_row_count:
md = event.mimeData()
fmt = "application/x-qabstractitemmodeldatalist"
if md.hasFormat(fmt):
encoded = md.data(fmt)
stream = QtCore.QDataStream(encoded, QtCore.QIODevice.ReadOnly)
datas = []
item = {}
while not stream.atEnd():
row = stream.readInt32()
column = stream.readInt32()
map_items = stream.readInt32()
for i in range(map_items):
key = stream.readInt32()
value = QtCore.QVariant()
stream >> value
item[QtCore.Qt.ItemDataRole(key)] = value
datas.append(item)
for data in datas:
identifier = data[QtCore.Qt.UserRole+1].value()
print("identifier: ", identifier)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
central_widget = QtWidgets.QWidget()
self.l_view = LListView()
self.r_view = RListView()
self.setCentralWidget(central_widget)
lay = QtWidgets.QHBoxLayout(central_widget)
lay.addWidget(self.l_view)
lay.addWidget(self.r_view)
self.loadImages()
def loadImages(self):
images = Path("images").glob("*.*")
for i, image in enumerate(images):
item = QtGui.QStandardItem()
identifier = "img_{:06d}".format(i+1)
item.setData(identifier, QtCore.Qt.UserRole+1)
item.setIcon(QtGui.QIcon(str(image)))
self.l_view.m_model.appendRow(item)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())