[PyKDE] Drag-Drop Doom

[Torsten Marek]

Vio schrieb:
> Greetings,
> I am trying to implement D&D. Dragging seems to work, but my code ain't 
> "dropping" it.
> Could someone "drag" their eyeballs over my code and maybe "drop" me 
> some hints...
> 
> Ok, what I want to do is simple: I have 2 or more instances of 
> "my_QIconView", populate them with some icons, and then I want to "D&D" 
> icons between them.
> Incidently, D&D inside the same my_QIconView works (don't ask me why:).
> Just not between side-by-side my_QIconView instances.
> 
> In my opinion, the problem resides somewhere in "contentsDropEvent()", 
> but then
> I don't quite understand the C++ examples 'dragdrop' nor 'fileiconview'.
> Couldn't find much on D&D in the list's archive either.
> 
> Cheers,
> Vio
> 
> 
> --- start code segment ----------------------------------
> 
> class my_QIconView(QIconView):
>     "testing Drag&drop"
>     def __init__(self,dragSource = None,name = None):         
> QIconView.__init__(self, dragSource, name)
>         self.setAcceptDrops(TRUE)
> 
> # DRAG ----------
> 
>     def startDrag(self):
>         "Drag-drop functionality"
>         print self.parent().name(),'---startDrag---'
>         d = self.dragObject() # get appropriate drag object
>         print self.parent().name(),'d1>',d
> #        d.drag(QIconDrag.DragCopyOrMove) - bad call: runtime error
>         d.dragMove()
> #        d.dragCopy() # calls dragEnterEvent,dragMoveEvent,dragLeaveEvent
>              # when 'drag' cursor leaves widget's boundaries
>         print self.parent().name(),'d2>',d
> 
>     def dragEnterEvent(self, e):
>         print self.parent().name(),'---dragEnterEvent---',e.format()
>         print 'canDecode>',e.accept(QIconDrag.canDecode(e))
> 
>     def dragMoveEvent(self, e):
>         print self.parent().name(),'---dragMoveEvent---',e.pos()
>         if e.source():
>             e.acceptAction()
> 
>     def dragLeaveEvent(self, e):
>         print self.parent().name(),'---dragLeaveEvent---',e
> 
> # DROP ---------------
> 
>     def contentsDropEvent(self, e):
>         print self.parent().name(),'---contentsDropEvent---'
>         print self.parent().name(),e.encodedData(e.format())
>         print 'e>',e
>         print 'action>',e.action()
>        
>         if e.action() == QDropEvent.Move:
>             print 'contentsDropEvent> MOVE'
>         elif e.action() == QDropEvent.Copy:
>             print 'contentsDropEvent> COPY'
> 
>         """ BAD code following up: yes, how do I get at my icon from here?
> 
>         icon = QPixmap()
>         if QIconDrag.canDecode(e, icon):
>             self.insertItemAt(icon, e.pos())
>         """
> --- end code segment ----------------------------------
> 
> 

One of the traps of using dNd with QIconView/QListView is that you need 
to call self.viewPort().setAcceptDrops(True). Maybe that does it for you.

greetings

Torsten

-- 
Torsten Marek <shlomme at gmx.net>
ID: A244C858 -- fingerprint 1902 0002 5DFC 856B F146  894C 7CC5 451E 
A244 C858
www.keyserver.net -- wwwkeys.eu.pgp.net

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