dropEventのevent.mimeData（）からドラッグされたオブジェクトと宛先オブジェクトを取得する方法は？

Question

QTreeWidgetItemにQTableWidgetItemまたはQTreeWidgetItemをドラッグしています。ドラッグ＆ドロップしているドラッグされたオブジェクトを取得するにはどうすればいいですか？QTreeWidgetItemをどのように取得できますか？

これは私が（#COMMENTSを参照してください）持っているものです。

import sys 
from PyQt4 import QtCore, QtGui 


class TreeWidget(QtGui.QTreeWidget): 
    def __init__(self, parent=None): 
     QtGui.QTreeWidget.__init__(self, parent) 
     self.header().setHidden(True) 
     self.setSelectionMode(self.ExtendedSelection) 
     self.setDragEnabled(True) 
     self.setAcceptDrops(True) 
     self.setDropIndicatorShown(True) 
     self.setDragDropMode(QtGui.QAbstractItemView.DragDrop) 

     self.itemDropped = QtCore.pyqtSignal() 

     item1 = QtGui.QTreeWidgetItem(self, ['first tree folder']) 
     item1.setData(1, QtCore.Qt.EditRole, 'first tree data') 

     item2 = QtGui.QTreeWidgetItem(item1, ['second tree folder']) 
     item2.setData(1, QtCore.Qt.EditRole, 'second tree data')   

     item3 = QtGui.QTreeWidgetItem(self, ['third tree folder']) 
     item3.setData(1, QtCore.Qt.EditRole, 'third tree data') 

     item1.setExpanded(True) 

    def dropEvent(self, event): 
     """On drop, get the target and the dragged item(s)""" 
     print 'drop!' 
     if (event.mimeData().hasFormat('application/x-qabstractitemmodeldatalist')): 
      source_widget = event.source() 
      # HOW TO GET DESTINATION HERE? 
      if isinstance(source_widget, QtGui.QTreeWidget): 
       # HOW TO GET DRAGGED ITEMS HERE? 
      if isinstance(source_widget, QtGui.QTableWidget): 
       # HOW TO GET DRAGGED ITEMS HERE? 
      event.accept() 
     else: 
      event.ignore() 

    def dragEnterEvent(self, event): 
     """Allow dragging from the tree and the table widgets""" 
     if (event.mimeData().hasFormat('application/x-qabstractitemmodeldatalist')): 
      source_widget = event.source() 
      if isinstance(source_widget, QtGui.QTreeWidget): 
       event.accept() # Move! 
      if isinstance(source_widget, QtGui.QTableWidget): 
       event.accept() 
     else: 
      event.ignore() 


class Table(QtGui.QTableWidget): 
    def __init__(self, parent=None): 
     QtGui.QTableWidget.__init__(self, parent) 

     self.setSelectionMode(self.ExtendedSelection) 
     self.setDragEnabled(True) 
     self.setAcceptDrops(False) 

     item1 = QtGui.QTableWidgetItem() 
     item1.setText('first table file') 
     item1.setData(QtCore.Qt.UserRole, 'first table data') 

     item2 = QtGui.QTableWidgetItem() 
     item2.setText('second table file') 
     item2.setData(QtCore.Qt.UserRole, 'second table data') 

     item3 = QtGui.QTableWidgetItem() 
     item3.setText('third file') 
     item3.setData(QtCore.Qt.UserRole, 'third table data') 

     self.setRowCount(3) 
     self.setColumnCount(1) 
     self.setItem(0, 0, item1) 
     self.setItem(1, 0, item2) 
     self.setItem(2, 0, item3) 


class Example(QtGui.QWidget): 
    def __init__(self): 
     super(Example, self).__init__() 

     self.main_layout = QtGui.QVBoxLayout() 
     self.setLayout(self.main_layout) 
     self.tree_widget = TreeWidget() 
     self.table = Table() 
     self.main_layout.addWidget(QtGui.QLabel('Folders')) 
     self.main_layout.addWidget(self.tree_widget) 
     self.main_layout.addWidget(QtGui.QLabel('Files')) 
     self.main_layout.addWidget(self.table) 
     self.show() 


def main(): 
    app = QtGui.QApplication([]) 
    ex = Example() 
    sys.exit(app.exec_()) 


if __name__ == '__main__': 
    main() 

Answer 1

これは私が最終的にそれを解決する方法である：

def dropEvent(self, event): 
    """On drop, get the target and the dragged item(s)""" 
    print 'drop!' 
    if (event.mimeData().hasFormat('application/x-qabstractitemmodeldatalist')): 
     source_widget = event.source() 
     destination = self.itemAt(event.pos()) 
     if isinstance(source_widget, QtGui.QTreeWidget): 
      selected_items = source_widget.selectedItems() 
     if isinstance(source_widget, QtGui.QTableWidget): 
      selected_items = [] 
      indexes = source_widget.selectionModel().selectedRows() 
      column = 0 
      for index in sorted(indexes): 
       selected_items.append(source_widget.item(index.row(), column)) 
     event.accept() 
    else: 
     event.ignore()