Drag and drop between two QTreeWidgets



  • I have the following code and I can't figure out how to get it into the dropEvent() method. I can click and drag and it enters the dragEnterEvent() and when I move the cursor to the second QTreeWidget, TreeTwo) it enters the dragMoveEvent(). The Item clicked on moves between QTreeWidgets, but the program never enters the dropEvent().

    @
    import sys
    import PySide

    from PySide.QtGui import *
    from PySide import QtCore, QtGui
    from PySide.QtGui import QMainWindow
    from PySide.QtGui import QApplication
    from PySide.QtCore import *
    from mainwindow_ui import Ui_MainWindow
    import platform

    class MainWindow(QMainWindow, Ui_MainWindow, QDialog):
    def init(self, parent=None):
    super(MainWindow, self).init(parent)

    self.setupUi(self)
    self.com = communicate()

    self.com.dropinfo.connect(self.TreeTwo.dropEvent(QtCore.Qt.MoveAction))

    def somefunc():
    print 'Helloooooooooooooooooooooooo'

    def whollycrap():
    print 'Suzannnnnnnnna'

    QtGui.QTreeWidget.connect(self.TreeTwo, QtCore.SIGNAL('dropEvent()'),somefunc)
    QtGui.QTreeWidget.connect(self.TreeTwo, QtCore.SIGNAL('dragMoveEvent()'), whollycrap)
    cities = QtGui.QTreeWidgetItem(self.TreeOne)
    cities.setText(0, ('cities'))
    osloItem = QTreeWidgetItem(cities)
    osloItem.setText(0, ('Oslo'))
    osloItem.setText(1, ('Yes'))

    towns = QtGui.QTreeWidgetItem(self.TreeTwo)
    towns.setText(0, ('towns'))
    vegasItem = QTreeWidgetItem(towns)
    vegasItem.setText(0, ('Las Vegas'))
    vegasItem.setText(1, ('Yes'))

    def dragEnterEvent(self, event):
    print 'In dragEnterEvent'
    event.accept()

    def dragMoveEvent(self, event):
    print 'In dragMoveEvent'
    event.setDropAction(QtCore.Qt.MoveAction)
    event.accept()

    def dropEvent(self):
    print 'In dropEvent'

    item=self.itemAt(event.pos())

    if item: self.addHere(item)

    event.accept()

    class communicate(QtCore.QObject):
    dropinfo = QtCore.Signal()

    def buildTree(self):

    cities = QTreeWidgetItem(mainwindow_ui.TreeOne)

    cities.setText(0, tr('cities'))

    osloItem = QTreeWidgetItem(cities)

    osloItem.setText(0, tr('Oslo'))

    osloItem.setText(1, tr('Yes'))

    app = QApplication(sys.argv)
    frame = MainWindow()
    frame.show()
    app.exec_()

    @

    David


  • Moderators

    aren't you missing the "event" parameter in your drop event handler?



  • Yes, sorry about that, I put that in and I still can't get to the dropEvent() when I drop on the second QTreeWidget.
    @
    def dropEvent(self, event):
    print 'In dropEvent'
    @


  • Lifetime Qt Champion

    Hi,

    Since you're using QTreeWidget did you check this "document":http://qt-project.org/doc/qt-4.8/model-view-programming.html#using-drag-and-drop-with-item-views



  • The documentation is quite intense for a newbie. Ok, so I have to use a mime-encoded datatype to transfer/import from one QtreeWidget to another?

    Still not sure how to do that. Any further assistance?



  • Just in case, because I didn't state, I am using python and PySide.


  • Lifetime Qt Champion

    Technically you just need the "Using convenience views" part of the document.

    [quote author="litlbear" date="1376093381"]Just in case, because I didn't state, I am using python and PySide.[/quote]

    The document still applies, you only have to translate the calls from C++ to python


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