PyQt->QTreeWidget to QGraphicsView drop failure

[prashant]

Hi,

Task:
Drag item from QTreeWidget and drop it to QGraphicsView

Here is the property set up and function to start the drag in QTreeWidget.
I am not using any more function except this one:

....
#
self.setDragEnabled(True)
self.setHeaderHidden(True)
self.setColumnCount(1)
self.setFocusPolicy(QtCore.Qt.NoFocus)
 
def startDrag(self, supportedActions):
 
        print self.currentItem().text(0)
        currentItemName = self.currentItem().text(0)
 
        mimeData = QtCore.QMimeData()
        mimeData.setText(currentItemName)
 
        drag = QtGui.QDrag(self)
        drag.setMimeData(mimeData)
 
        dropAction = drag.start(QtCore.Qt.CopyAction)

....
#
self.setDragEnabled(True)
self.setHeaderHidden(True)
self.setColumnCount(1)
self.setFocusPolicy(QtCore.Qt.NoFocus)

def startDrag(self, supportedActions):
        
        print self.currentItem().text(0)
        currentItemName = self.currentItem().text(0)

        mimeData = QtCore.QMimeData()
        mimeData.setText(currentItemName)

        drag = QtGui.QDrag(self)
        drag.setMimeData(mimeData)
                
        dropAction = drag.start(QtCore.Qt.CopyAction)

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Here is the property set up and function for dropping in QGraphicsView.
I am using only two functions here:

....
self.setScene(QxScene(self))
self.setCacheMode(QtGui.QGraphicsView.CacheBackground)
self.setRenderHint(QtGui.QPainter.Antialiasing, 1)
self.setDragMode(QtGui.QGraphicsView.RubberBandDrag)
self.setOptimizationFlags(QtGui.QGraphicsView.DontSavePainterState)
self.setViewportUpdateMode(QtGui.QGraphicsView.SmartViewportUpdate)
self.setBackgroundBrush(QtCore.Qt.lightGray)
self.setAcceptDrops(True)
 
    def dragEnterEvent(self, event):
        if event.mimeData().hasText():
            event.acceptProposedAction()
            print "enter accepted"
        else:
            print "enter ignore"
            event.ignore()        
 
    def dropEvent(self, event):
        if event.mimeData().hasText():
            xmlFileName = event.mimeData().text()
            position = event.pos()
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()
            print xmlFileName, position
        else:
            print "drop ignore"
            event.ignore()

....
self.setScene(QxScene(self))
self.setCacheMode(QtGui.QGraphicsView.CacheBackground)
self.setRenderHint(QtGui.QPainter.Antialiasing, 1)
self.setDragMode(QtGui.QGraphicsView.RubberBandDrag)
self.setOptimizationFlags(QtGui.QGraphicsView.DontSavePainterState)
self.setViewportUpdateMode(QtGui.QGraphicsView.SmartViewportUpdate)
self.setBackgroundBrush(QtCore.Qt.lightGray)
self.setAcceptDrops(True)

    def dragEnterEvent(self, event):
        if event.mimeData().hasText():
            event.acceptProposedAction()
            print "enter accepted"
        else:
            print "enter ignore"
            event.ignore()        
        
    def dropEvent(self, event):
        if event.mimeData().hasText():
            xmlFileName = event.mimeData().text()
            position = event.pos()
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()
            print xmlFileName, position
        else:
            print "drop ignore"
            event.ignore()

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As soon as mouse is entering in QGraphicsView, message "event accepted" is getting printed in function "dragEnterEvent".

Problem is that cursor is still forbidden cursor and I can't drop.


Cheers

Prashant

Python 2.5.2
PyQt-Py2.5-gpl-4.4.3-1
Win XP, 32 Bit

[Ondertitel]

Still not answered after almost two years?
For other Googlers like me reaching this thread, you have to implement this too:

def dragMoveEvent(self, event):

def dragMoveEvent(self, event):

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The most confusing moment was when you want to drop on "normal" widget you need to reimplement dropEvent and dragEnterEvent, but when you drop on QGraphcisView, you need to reimplement dragMoveEvent too.

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