Hello Justin, Thanks for the knowledge boost, I will be keeping that in mind. I may try to create my own custom mimeData later on once I have gotten the current system down if I feel I would benefit from it.
Cheers, Ben On 23 April 2015 at 13:06, Justin Israel <[email protected]> wrote: > The QDataStream approach is very C++ centric. Also the particular mimetype > you are handling in this example happens to be Qt's internal mimetype spec > for communicating item drag and drops. That means the default drag and drop > behavior does generate it's own mimetype protocol. > > When you implement your own drag routine, either by implementing the high > level mimeData or the lower level startDrag or the actual events > themselves, you get to control how you want to talk between the drag source > and the drop target. You can specify your own custom type, and send either > plain text, or even json or pickle data. Qt happens to use its binary > protocol to transmit serialized data. > > Your code example happens to be decoding the builtin mimetype for internal > drag and drops. It streams the data out of the mimetype in the expected > order. > > On Thu, 23 Apr 2015 10:51 PM Benjam901 <[email protected]> wrote: > >> Hello Joe, >> >> Thanks for the great amount of help. I have learnt a lot from digging >> through your code and will use it as an exercise to get my exp up with >> custom models and such in the future. As for decoding the mime data goes, I >> managed to retrieve it using a great source on StackOverflow ( >> http://stackoverflow.com/questions/8609794/pyqt-mimedata-to-string-conversion-how-do-i-eliminate-some-spaces-but-not-all) >> and it now returns a string of the item dragged in. >> >> Any normal person would be happy with that but since I don't fully >> understand what is going on I personally feel this is useless as I have not >> learnt anything and if a problem should arise I would not be able to debug >> it myself. >> >> Would you be able to help me out in understanding what is going on. Does >> Qt generate on drag operations default mimeData from events, Why do we have >> to pass them into streams and then decode them etc. >> >> Here is what I have: >> >> # Drag and drop setup inside the __init__ class using >> QtDesigner windows >> >> self.uiMainWindow.uiNodeUnit.setDragEnabled(True) >> >> self.uiMainWindow.uiUnitTree.setDropIndicatorShown(True) >> self.uiMainWindow.uiUnitTree.setAcceptDrops(True) >> self.uiMainWindow.uiUnitTree.setDragEnabled(True) >> self.uiMainWindow.uiUnitTree.viewport().installEventFilter(self) >> >> >> # TODO: Decode mime data >> def eventFilter(self, source, event): >> if (event.type() == QtCore.QEvent.Drop): >> mimeData = event.mimeData() >> for mimeFormat in mimeData.formats(): >> # we only want to attempt to decode >> QAbstractItem's >> if mimeFormat != >> "application/x-qabstractitemmodeldatalist": >> continue >> data = >> self.decodeMimeData(mimeData.data(mimeFormat)) >> >> elif (event.type() == QtCore.QEvent.DragEnter): >> print "DRAGGING" >> return QtGui.QMainWindow.eventFilter(self, source, event) >> >> def decodeMimeData(self, mimeData): >> result = {} >> value = QtCore.QVariant() >> stream = QtCore.QDataStream(mimeData) >> >> while not stream.atEnd(): >> # row and column for the data >> row = stream.readInt32() >> col = stream.readInt32() >> item = result.setdefault(col, {}) >> for role in range(stream.readInt32()): >> key = QtCore.Qt.ItemDataRole(stream.readInt32()) >> stream >> value >> item[key] = value.toPyObject() >> return result[0][QtCore.Qt.DisplayRole] >> >> >> >> On Wednesday, 22 April 2015 23:21:33 UTC+2, Joe Weidenbach wrote: >> >>> Pretty much my feeling too, but if you've got to get up and running >>> quick, this *could *work :) >>> >> On Wed, Apr 22, 2015 at 1:55 PM, Justin Israel <[email protected]> >>> wrote: >>> >> Back when I used to use Designer, I also preferred the approach of just >>>> "blocking out" a spot in the layout where I would then add a custom widget >>>> in code. That way you can still have a clean custom class implementation of >>>> your own. >>>> >>>> On Thu, Apr 23, 2015 at 8:40 AM Joe Weidenbach <[email protected]> >>>> wrote: >>>> >>> You might also look into this process using Designer to "promote" your >>>>> TreeWidget and TableWidget in the designer: >>>>> >>>>> https://groups.google.com/forum/#!topic/pyside/UCPk5MzoDPA >>>>> >>>>> Haven't tried it, might be worthwhile though. >>>>> >>>> On Wed, Apr 22, 2015 at 1:30 PM, Joe Weidenbach <[email protected]> >>>>> wrote: >>>>> >>>> Ok, quick answer :) >>>>>> >>>>>> It can work to assign the functions in your code for your design >>>>>> window (at least it works for how I'm doing it, haven't tried from the >>>>>> actual design window). I only did this for the TreeWidget, but it should >>>>>> work for the TableWidget too. I definitely don't like this code as much, >>>>>> but it DOES work. >>>>>> >>>>>> ```python >>>>>> import json >>>>>> >>>>>> from PySide import QtCore, QtGui >>>>>> >>>>>> class SourceWidget(QtGui.QTableWidget): >>>>>> def __init__(self, parent=None): >>>>>> super(SourceWidget, self).__init__(parent) >>>>>> self.setDragEnabled(True) >>>>>> >>>>>> def startDrag(self, supportedActions): >>>>>> items = self.selectedItems() >>>>>> indexes = self.selectedIndexes() >>>>>> if len(items) > 0: >>>>>> data = self.mimeData(items) >>>>>> if not data: >>>>>> return >>>>>> >>>>>> pixmap, rect = self.__renderToPixmap(indexes) >>>>>> drag = QtGui.QDrag(self) >>>>>> drag.setPixmap(pixmap) >>>>>> drag.setMimeData(data) >>>>>> drag.setHotSpot(self.__mouseClickPosition - rect.topLeft()) >>>>>> drag.exec_(supportedActions, QtCore.Qt.CopyAction) >>>>>> >>>>>> def mousePressEvent(self, event): >>>>>> if event.button() == QtCore.Qt.MouseButton.LeftButton: >>>>>> self.__mouseClickPosition = event.pos() >>>>>> >>>>>> super(SourceWidget, self).mousePressEvent(event) >>>>>> >>>>>> def mimeTypes(self): >>>>>> return ['application/x-my-custom-mimetype'] >>>>>> >>>>>> def mimeData(self, items): >>>>>> if len(items) == 0: >>>>>> return False >>>>>> >>>>>> mimeData = QtCore.QMimeData() >>>>>> data = QtCore.QByteArray() >>>>>> stream = QtCore.QDataStream(data, QtCore.QIODevice.WriteOnly) >>>>>> >>>>>> for item in items: >>>>>> firstColData = self.item(item.row(), >>>>>> 0).data(QtCore.Qt.DisplayRole) >>>>>> secondColData = self.item(item.row(), >>>>>> 1).data(QtCore.Qt.DisplayRole) >>>>>> output = (firstColData, secondColData) >>>>>> stream << json.dumps(output) >>>>>> >>>>>> mimeData.setData('application/x-my-custom-mimetype', data) >>>>>> return mimeData >>>>>> >>>>>> def __renderToPixmap(self, indexes): >>>>>> rect, paintPairs = self.__draggablePaintPairs(indexes) >>>>>> if len(paintPairs) == 0: >>>>>> return QtGui.QPixmap() >>>>>> pixmap = QtGui.QPixmap(rect.width(), rect.height()) >>>>>> pixmap.fill(QtCore.Qt.transparent) >>>>>> >>>>>> painter = QtGui.QPainter(pixmap) >>>>>> option = self.viewOptions() >>>>>> option.state |= QtGui.QStyle.State_Selected >>>>>> for r, index in paintPairs: >>>>>> option.rect = r.translated(-r.topLeft()) >>>>>> self.itemDelegate(index).paint(painter, option, index) >>>>>> return (pixmap, rect) >>>>>> >>>>>> def __draggablePaintPairs(self, indexes): >>>>>> rect = QtCore.QRect() >>>>>> viewportRect = self.viewport().rect() >>>>>> ret = [] >>>>>> for index in indexes: >>>>>> current = self.visualRect(index) >>>>>> if current.intersects(viewportRect): >>>>>> ret.append((current, index)) >>>>>> rect = rect | current >>>>>> rect = rect & viewportRect >>>>>> return (rect, ret) >>>>>> >>>>>> class MainWindow(QtGui.QWidget): >>>>>> def __init__(self, parent=None): >>>>>> super(MainWindow, self).__init__(parent) >>>>>> >>>>>> layout = QtGui.QHBoxLayout() >>>>>> >>>>>> source = SourceWidget(self) >>>>>> source.setRowCount(5) >>>>>> source.setColumnCount(2) >>>>>> for i in range(5): >>>>>> source.setItem(i, 0, QtGui.QTableWidgetItem("Item >>>>>> {0}".format(i+1))) >>>>>> source.setItem(i, 1, QtGui.QTableWidgetItem("Item {0} Col >>>>>> 2".format(i+1))) >>>>>> layout.addWidget(source) >>>>>> >>>>>> dest = QtGui.QTreeWidget(self) >>>>>> dest.supportedDropActions = self.DestSupportedDropActions >>>>>> dest.dragEnterEvent = self.DestDragEnterEvent >>>>>> dest.dragMoveEvent = self.DestDragMoveEvent >>>>>> dest.dropMimeData = self.DestDropMimeData >>>>>> dest.setAcceptDrops(True) >>>>>> dest.setDropIndicatorShown(True) >>>>>> dest.setDefaultDropAction(QtCore.Qt.CopyAction) >>>>>> dest.setDragDropMode(QtGui.QAbstractItemView.DropOnly) >>>>>> dest.setColumnCount(2) >>>>>> top = QtGui.QTreeWidgetItem(dest) >>>>>> top.setText(0, "Root") >>>>>> dest.addTopLevelItem(top) >>>>>> layout.addWidget(dest) >>>>>> >>>>>> self.setLayout(layout) >>>>>> >>>>>> def DestSupportedDropActions(self): >>>>>> return QtCore.Qt.CopyAction >>>>>> >>>>>> def DestDragEnterEvent(self, event): >>>>>> if >>>>>> event.mimeData().hasFormat('application/x-my-custom-mimetype'): >>>>>> event.acceptProposedAction() >>>>>> >>>>>> def DestDragMoveEvent(self, event): >>>>>> event.accept() >>>>>> >>>>>> def DestDropMimeData(self, parent, index, data, action): >>>>>> if not data.hasFormat('application/x-my-custom-mimetype'): >>>>>> return False >>>>>> >>>>>> encodedData = data.data('application/x-my-custom-mimetype') >>>>>> stream = QtCore.QDataStream(encodedData, >>>>>> QtCore.QIODevice.ReadOnly) >>>>>> jsonData = stream.readString() >>>>>> dropData = json.loads(jsonData) >>>>>> >>>>>> newItem = QtGui.QTreeWidgetItem(parent) >>>>>> newItem.setText(0, dropData[0]) >>>>>> newItem.setText(1, dropData[1]) >>>>>> parent.addChild(newItem) >>>>>> >>>>>> return True >>>>>> >>>>>> if __name__ == '__main__': >>>>>> import sys >>>>>> app = QtGui.QApplication(sys.argv) >>>>>> >>>>>> win = MainWindow() >>>>>> win.show() >>>>>> >>>>>> sys.exit(app.exec_()) >>>>>> ``` >>>>>> >>>>> On Wed, Apr 22, 2015 at 1:20 PM, Joe Weidenbach <[email protected]> >>>>>> wrote: >>>>>> >>>>> I don't honestly know if you can just override what's there, I can >>>>>>> experiment a little bit though. I know you *CAN* create a plugin for Qt >>>>>>> Designer with your custom class to use, but it might be easier for that >>>>>>> purpose to put in a layout or frame where your Child Widgets will go, >>>>>>> and >>>>>>> then set them up in code, parented to the frame you made. Not clean, >>>>>>> but >>>>>>> it could work to shoehorn it in so you don't lose work. It might make >>>>>>> things a bit more complex in the long run. That's the tricky part of >>>>>>> designer--it's great when you just want to use base widgets, but it's a >>>>>>> lot >>>>>>> of overhead to build a plugin for every custom widget you want to reuse. >>>>>>> And I override so many things nowadays, I find I'm very rarely using >>>>>>> base >>>>>>> widgets in my main window layout. If I do use Designer (It does make >>>>>>> adjusting layout easier for complex projects), it's to make a custom >>>>>>> widget, which I can then build my code for, and then I can include it >>>>>>> in my >>>>>>> main window from code. >>>>>>> >>>>>> On Wed, Apr 22, 2015 at 1:10 PM, Ben Hearn <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>> Thank you very much that is a great example. I will take a solid dig >>>>>>>> into it ASAP. Just a point of reference I should have mentioned >>>>>>>> earlier. >>>>>>>> I have created my GUI using QT designer would this affect any of the >>>>>>>> behaviour? i.e. If I am setting dragEnabled and such in the __init__ >>>>>>>> function of my main window would overriding the mouse event and >>>>>>>> startdrag >>>>>>>> functions etc. still apply individually if I set them correctly or >>>>>>>> would I >>>>>>>> have to create some sort of workaround in this case? >>>>>>> >>>>>>> >>>>>>>> >>>>>>>> On Wednesday, 22 April 2015, Joe Weidenbach <[email protected]> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> and apparently my markdown here is not working yet :) >>>>>>>>> >>>>>>>>> On Wed, Apr 22, 2015 at 12:54 PM, Joe Weidenbach < >>>>>>>>> [email protected]> wrote: >>>>>>>>> >>>>>>>>>> Ok, I got a working example of what I think you're looking for. >>>>>>>>>> I probably went a little overboard on it, but I like to take control >>>>>>>>>> of >>>>>>>>>> various aspects of the drag and drop operations, and it's decent >>>>>>>>>> reference >>>>>>>>>> for if you want to do so. It's pretty dirty at the moment, so if >>>>>>>>>> you have >>>>>>>>>> questions feel free to ask. I basically extended the QTableWidget >>>>>>>>>> and >>>>>>>>>> QTreeWidget to get the behavior I was going for, and then used those >>>>>>>>>> in my >>>>>>>>>> main window. You can drag from the table widget to the tree widget. >>>>>>>>>> I >>>>>>>>>> encoded my mime data using json before passing it through the >>>>>>>>>> bitstream. >>>>>>>>>> >>>>>>>>>> ```python >>>>>>>>>> import json >>>>>>>>>> >>>>>>>>>> from PySide import QtCore, QtGui >>>>>>>>>> >>>>>>>>>> class SourceWidget(QtGui.QTableWidget): >>>>>>>>>> def __init__(self, parent=None): >>>>>>>>>> super(SourceWidget, self).__init__(parent) >>>>>>>>>> self.setDragEnabled(True) >>>>>>>>>> >>>>>>>>>> def startDrag(self, supportedActions): >>>>>>>>>> items = self.selectedItems() >>>>>>>>>> indexes = self.selectedIndexes() >>>>>>>>>> if len(items) > 0: >>>>>>>>>> data = self.mimeData(items) >>>>>>>>>> if not data: >>>>>>>>>> return >>>>>>>>>> >>>>>>>>>> pixmap, rect = self.__renderToPixmap(indexes) >>>>>>>>>> drag = QtGui.QDrag(self) >>>>>>>>>> drag.setPixmap(pixmap) >>>>>>>>>> drag.setMimeData(data) >>>>>>>>>> drag.setHotSpot(self.__mouseClickPosition - >>>>>>>>>> rect.topLeft()) >>>>>>>>>> drag.exec_(supportedActions, QtCore.Qt.CopyAction) >>>>>>>>>> >>>>>>>>>> def mousePressEvent(self, event): >>>>>>>>>> if event.button() == QtCore.Qt.MouseButton.LeftButton: >>>>>>>>>> self.__mouseClickPosition = event.pos() >>>>>>>>>> >>>>>>>>>> super(SourceWidget, self).mousePressEvent(event) >>>>>>>>>> >>>>>>>>>> def mimeTypes(self): >>>>>>>>>> return ['application/x-my-custom-mimetype'] >>>>>>>>>> >>>>>>>>>> def mimeData(self, items): >>>>>>>>>> if len(items) == 0: >>>>>>>>>> return False >>>>>>>>>> >>>>>>>>>> mimeData = QtCore.QMimeData() >>>>>>>>>> data = QtCore.QByteArray() >>>>>>>>>> stream = QtCore.QDataStream(data, >>>>>>>>>> QtCore.QIODevice.WriteOnly) >>>>>>>>>> >>>>>>>>>> for item in items: >>>>>>>>>> firstColData = self.item(item.row(), >>>>>>>>>> 0).data(QtCore.Qt.DisplayRole) >>>>>>>>>> secondColData = self.item(item.row(), >>>>>>>>>> 1).data(QtCore.Qt.DisplayRole) >>>>>>>>>> output = (firstColData, secondColData) >>>>>>>>>> stream << json.dumps(output) >>>>>>>>>> >>>>>>>>>> mimeData.setData('application/x-my-custom-mimetype', data) >>>>>>>>>> return mimeData >>>>>>>>>> >>>>>>>>>> def __renderToPixmap(self, indexes): >>>>>>>>>> rect, paintPairs = self.__draggablePaintPairs(indexes) >>>>>>>>>> if len(paintPairs) == 0: >>>>>>>>>> return QtGui.QPixmap() >>>>>>>>>> pixmap = QtGui.QPixmap(rect.width(), rect.height()) >>>>>>>>>> pixmap.fill(QtCore.Qt.transparent) >>>>>>>>>> >>>>>>>>>> painter = QtGui.QPainter(pixmap) >>>>>>>>>> option = self.viewOptions() >>>>>>>>>> option.state |= QtGui.QStyle.State_Selected >>>>>>>>>> for r, index in paintPairs: >>>>>>>>>> option.rect = r.translated(-r.topLeft()) >>>>>>>>>> self.itemDelegate(index).paint(painter, option, index) >>>>>>>>>> return (pixmap, rect) >>>>>>>>>> >>>>>>>>>> def __draggablePaintPairs(self, indexes): >>>>>>>>>> rect = QtCore.QRect() >>>>>>>>>> viewportRect = self.viewport().rect() >>>>>>>>>> ret = [] >>>>>>>>>> for index in indexes: >>>>>>>>>> current = self.visualRect(index) >>>>>>>>>> if current.intersects(viewportRect): >>>>>>>>>> ret.append((current, index)) >>>>>>>>>> rect = rect | current >>>>>>>>>> rect = rect & viewportRect >>>>>>>>>> return (rect, ret) >>>>>>>>>> >>>>>>>>>> class DestinationWidget(QtGui.QTreeWidget): >>>>>>>>>> def __init__(self, parent=None): >>>>>>>>>> super(DestinationWidget, self).__init__(parent) >>>>>>>>>> self.setAcceptDrops(True) >>>>>>>>>> self.setDropIndicatorShown(True) >>>>>>>>>> self.setDefaultDropAction(QtCore.Qt.CopyAction) >>>>>>>>>> self.setDragDropMode(QtGui.QAbstractItemView.DropOnly) >>>>>>>>>> >>>>>>>>>> def supportedDropActions(self): >>>>>>>>>> return QtCore.Qt.CopyAction >>>>>>>>>> >>>>>>>>>> def dragEnterEvent(self, event): >>>>>>>>>> if >>>>>>>>>> event.mimeData().hasFormat('application/x-my-custom-mimetype'): >>>>>>>>>> event.acceptProposedAction() >>>>>>>>>> >>>>>>>>>> def dragMoveEvent(self, event): >>>>>>>>>> event.accept() >>>>>>>>>> >>>>>>>>>> def dropMimeData(self, parent, index, data, action): >>>>>>>>>> if not data.hasFormat('application/x-my-custom-mimetype'): >>>>>>>>>> return False >>>>>>>>>> >>>>>>>>>> encodedData = >>>>>>>>>> data.data('application/x-my-custom-mimetype') >>>>>>>>>> stream = QtCore.QDataStream(encodedData, >>>>>>>>>> QtCore.QIODevice.ReadOnly) >>>>>>>>>> jsonData = stream.readString() >>>>>>>>>> dropData = json.loads(jsonData) >>>>>>>>>> >>>>>>>>>> newItem = QtGui.QTreeWidgetItem(parent) >>>>>>>>>> newItem.setText(0, dropData[0]) >>>>>>>>>> newItem.setText(1, dropData[1]) >>>>>>>>>> parent.addChild(newItem) >>>>>>>>>> >>>>>>>>>> return True >>>>>>>>>> >>>>>>>>>> class MainWindow(QtGui.QWidget): >>>>>>>>>> def __init__(self, parent=None): >>>>>>>>>> super(MainWindow, self).__init__(parent) >>>>>>>>>> >>>>>>>>>> layout = QtGui.QHBoxLayout() >>>>>>>>>> >>>>>>>>>> source = SourceWidget(self) >>>>>>>>>> source.setRowCount(5) >>>>>>>>>> source.setColumnCount(2) >>>>>>>>>> for i in range(5): >>>>>>>>>> source.setItem(i, 0, QtGui.QTableWidgetItem("Item >>>>>>>>>> {0}".format(i+1))) >>>>>>>>>> source.setItem(i, 1, QtGui.QTableWidgetItem("Item {0} >>>>>>>>>> Col 2".format(i+1))) >>>>>>>>>> layout.addWidget(source) >>>>>>>>>> >>>>>>>>>> dest = DestinationWidget(self) >>>>>>>>>> dest.setColumnCount(2) >>>>>>>>>> top = QtGui.QTreeWidgetItem(dest) >>>>>>>>>> top.setText(0, "Root") >>>>>>>>>> dest.addTopLevelItem(top) >>>>>>>>>> layout.addWidget(dest) >>>>>>>>>> >>>>>>>>>> self.setLayout(layout) >>>>>>>>>> >>>>>>>>>> if __name__ == '__main__': >>>>>>>>>> import sys >>>>>>>>>> app = QtGui.QApplication(sys.argv) >>>>>>>>>> >>>>>>>>>> win = MainWindow() >>>>>>>>>> win.show() >>>>>>>>>> >>>>>>>>>> sys.exit(app.exec_()) >>>>>>>>>> ``` >>>>>>>>>> >>>>>>>>>> On Wed, Apr 22, 2015 at 12:34 PM, Joe Weidenbach < >>>>>>>>>> [email protected]> wrote: >>>>>>>>>> >>>>>>>>>>> For the simple solution, yes, it's a matter of decoding the >>>>>>>>>>> mimeData. If you want to do something custom though, you're going >>>>>>>>>>> to need >>>>>>>>>>> to encode the mimeData yourself in the source TableWidget (for >>>>>>>>>>> example, if >>>>>>>>>>> you want to transfer the whole row). It's a good exercise >>>>>>>>>>> regardless for >>>>>>>>>>> when you get to using custom QAbstractItemModels. >>>>>>>>>>> >>>>>>>>>>> I should have some sample code for you relatively shortly :) >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On Wed, Apr 22, 2015 at 10:57 AM, Ben Hearn < >>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>> >>>>>>>>>>>> Ok awesome thanks for the help. I was digging at it earlier and >>>>>>>>>>>> when I printed my mimedata using >>>>>>>>>>>> >>>>>>>>>>>> For format in mimedata.mimeFormats(): >>>>>>>>>>>> Print mimedata(format) >>>>>>>>>>>> >>>>>>>>>>>> (From my iPhone so something along those lines) >>>>>>>>>>>> >>>>>>>>>>>> The name of the tablewidget I dragged from was present but it >>>>>>>>>>>> was surrounded by empty spaces. Is this just a matter of decoding >>>>>>>>>>>> it >>>>>>>>>>>> properly? >>>>>>>>>>>> >>>>>>>>>>>> On Wednesday, 22 April 2015, Joe Weidenbach <[email protected]> >>>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> Well, speaking from the perspective of custom >>>>>>>>>>>>> QAbstractItemModel with QTreeViews or QTableViews, that's EXACTLY >>>>>>>>>>>>> the >>>>>>>>>>>>> path. I'm going to test with the Convenience widgets though, so >>>>>>>>>>>>> I'll keep >>>>>>>>>>>>> you posted. The basics are these: mime data is binary, and you >>>>>>>>>>>>> can attach >>>>>>>>>>>>> it to an arbitrary label of datatype. That data type can be >>>>>>>>>>>>> whatever you >>>>>>>>>>>>> want it to be (although there are some standard ones such as >>>>>>>>>>>>> 'text/html' >>>>>>>>>>>>> and whatnot. I personally make my own, eg >>>>>>>>>>>>> 'application/x-hierarchy-block'. Then you just push a stream of >>>>>>>>>>>>> the data >>>>>>>>>>>>> you want to encode. In several of my projects, that was the >>>>>>>>>>>>> output of the >>>>>>>>>>>>> repr() method for the object being dragged. in others, it might >>>>>>>>>>>>> be a node >>>>>>>>>>>>> id, or pretty much anything you want. It just depends on the use >>>>>>>>>>>>> case. >>>>>>>>>>>>> >>>>>>>>>>>>> I keep trying to find a use case for the convenience widgets >>>>>>>>>>>>> (QTreeWidget etc), and at least in my experience, while they're >>>>>>>>>>>>> great for >>>>>>>>>>>>> one-time use data, most of my projects use persistance, so I've >>>>>>>>>>>>> ended up >>>>>>>>>>>>> going more into the custom models and hooking up views. When you >>>>>>>>>>>>> go that >>>>>>>>>>>>> route, though, there's a lot more boilerplate you have to set up, >>>>>>>>>>>>> so keep >>>>>>>>>>>>> that in mind. >>>>>>>>>>>>> >>>>>>>>>>>>> As I said, I'll get something coded up today to test it out. >>>>>>>>>>>>> >>>>>>>>>>>>> On Wed, Apr 22, 2015 at 9:08 AM, Benjam901 < >>>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>>> >>>>>>>>>>>>>> Hello Joe, >>>>>>>>>>>>>> >>>>>>>>>>>>>> That would be a massive help thank you very much. >>>>>>>>>>>>>> >>>>>>>>>>>>>> I have found something online that has mentioned decoding the >>>>>>>>>>>>>> mimedata using QDataStream which indicates to me that the data >>>>>>>>>>>>>> is binary. >>>>>>>>>>>>>> If this is the case I would really like to be able to set my >>>>>>>>>>>>>> mime data >>>>>>>>>>>>>> myself so that decoding it is a little easier. That being said, >>>>>>>>>>>>>> my current >>>>>>>>>>>>>> experience in encoding/decoding binary data is limited. Would >>>>>>>>>>>>>> this be a >>>>>>>>>>>>>> good path to wander down? >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> http://pythonically.blogspot.se/2009/11/drag-and-drop-in-pyqt.html >>>>>>>>>>>>>> >>>>>>>>>>>>>> Cheers, >>>>>>>>>>>>>> >>>>>>>>>>>>>> Ben >>>>>>>>>>>>>> >>>>>>>>>>>>>> -- >>>>>>>>>>>>>> You received this message because you are subscribed to the >>>>>>>>>>>>>> Google Groups "Python Programming for Autodesk Maya" group. >>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from >>>>>>>>>>>>>> it, send an email to >>>>>>>>>>>>>> [email protected]. >>>>>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>>>>> https://groups.google.com/d/msgid/python_inside_maya/8095ee58-77f0-4766-bd75-768b44e903c4%40googlegroups.com >>>>>>>>>>>>>> <https://groups.google.com/d/msgid/python_inside_maya/8095ee58-77f0-4766-bd75-768b44e903c4%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>>>>>>>> . >>>>>>>>>>>>>> >>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> -- >>>>>>>>>>>>> You received this message because you are subscribed to a >>>>>>>>>>>>> topic in the Google Groups "Python Programming for Autodesk Maya" >>>>>>>>>>>>> group. >>>>>>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>>>>>> https://groups.google.com/d/topic/python_inside_maya/_6fvzObx1Ds/unsubscribe >>>>>>>>>>>>> . >>>>>>>>>>>>> To unsubscribe from this group and all its topics, send an >>>>>>>>>>>>> email to [email protected]. >>>>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>>>> https://groups.google.com/d/msgid/python_inside_maya/CAM33%3Da5rW8Dus%2BWgOSb888GHdtrHc7B9Y11WXAkkWbnENNS8RQ%40mail.gmail.com >>>>>>>>>>>>> <https://groups.google.com/d/msgid/python_inside_maya/CAM33%3Da5rW8Dus%2BWgOSb888GHdtrHc7B9Y11WXAkkWbnENNS8RQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>>>>>>>>>> . >>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>>>>>> >>>>>>>>>>>> Tel - +46 76245 92 90 (Sweden) >>>>>>>>>>>> LinkedIn: http://www.linkedin.com/pub/ben-hearn/50/a64/33b >>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>>>>>> You received this message because you are subscribed to the >>>>>>>>>>>> Google Groups "Python Programming for Autodesk Maya" group. >>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from >>>>>>>>>>>> it, send an email to >>>>>>>>>>>> [email protected]. >>>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>>> https://groups.google.com/d/msgid/python_inside_maya/CAM2ybkWMi3wv6FK5cp06m5u2-Scu2FGkbY8SFKs0uWZ%2BVTE6zQ%40mail.gmail.com >>>>>>>>>>>> <https://groups.google.com/d/msgid/python_inside_maya/CAM2ybkWMi3wv6FK5cp06m5u2-Scu2FGkbY8SFKs0uWZ%2BVTE6zQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>>>>>>>>> . >>>>>>>>>>>> >>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>> >>>>>>>>> -- >>>>>>>>> You received this message because you are subscribed to a topic in >>>>>>>>> the Google Groups "Python Programming for Autodesk Maya" group. >>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>> https://groups.google.com/d/topic/python_inside_maya/_6fvzObx1Ds/unsubscribe >>>>>>>>> . >>>>>>>>> To unsubscribe from this group and all its topics, send an email >>>>>>>>> to [email protected]. >>>>>>>>> To view this discussion on the web visit >>>>>>>>> https://groups.google.com/d/msgid/python_inside_maya/CAM33%3Da5t_GdfYDfv%3DCfQUE7M3P1089HQ0hPy7FXA_p-VYp6Wew%40mail.gmail.com >>>>>>>>> <https://groups.google.com/d/msgid/python_inside_maya/CAM33%3Da5t_GdfYDfv%3DCfQUE7M3P1089HQ0hPy7FXA_p-VYp6Wew%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>>>>>> . >>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> >>>>>>>> Tel - +46 76245 92 90 (Sweden) >>>>>>>> LinkedIn: http://www.linkedin.com/pub/ben-hearn/50/a64/33b >>>>>>>> >>>>>>>> -- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "Python Programming for Autodesk Maya" group. >>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>> send an email to [email protected]. >>>>>>>> To view this discussion on the web visit >>>>>>>> https://groups.google.com/d/msgid/python_inside_maya/CAM2ybkULYGu1cZfk8NxPyj5vB_pyK_706U7J307BrJNWxfQ9PA%40mail.gmail.com >>>>>>>> <https://groups.google.com/d/msgid/python_inside_maya/CAM2ybkULYGu1cZfk8NxPyj5vB_pyK_706U7J307BrJNWxfQ9PA%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>>>>> . >>>>>>>> >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Python Programming for Autodesk Maya" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> >>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/python_inside_maya/CAM33%3Da7kEx0qpZAC8xdvK-gvsqSYu823o%3DnmUKrHVjTpEiks0g%40mail.gmail.com >>>>> <https://groups.google.com/d/msgid/python_inside_maya/CAM33%3Da7kEx0qpZAC8xdvK-gvsqSYu823o%3DnmUKrHVjTpEiks0g%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Python Programming for Autodesk Maya" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/python_inside_maya/CAPGFgA38Hw2Tjs2cobPoicU_cdoL4HvMArJhc7dqJY2-H4ZKmw%40mail.gmail.com >>>> <https://groups.google.com/d/msgid/python_inside_maya/CAPGFgA38Hw2Tjs2cobPoicU_cdoL4HvMArJhc7dqJY2-H4ZKmw%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >> You received this message because you are subscribed to the Google Groups >> "Python Programming for Autodesk Maya" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/python_inside_maya/3a0d36c9-f788-4234-9ec5-b6255a3750f2%40googlegroups.com >> <https://groups.google.com/d/msgid/python_inside_maya/3a0d36c9-f788-4234-9ec5-b6255a3750f2%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "Python Programming for Autodesk Maya" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/python_inside_maya/_6fvzObx1Ds/unsubscribe > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/python_inside_maya/CAPGFgA1euiwt-3yt5eB6UvmctLf%2ByUOcZSnc7UvMcvM%3DYjcVdA%40mail.gmail.com > <https://groups.google.com/d/msgid/python_inside_maya/CAPGFgA1euiwt-3yt5eB6UvmctLf%2ByUOcZSnc7UvMcvM%3DYjcVdA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Tel - +46 76245 92 90 (Sweden) LinkedIn: http://www.linkedin.com/pub/ben-hearn/50/a64/33b -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. 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