CODEWITHSUNDEEP
pythonuser-interfacedrag-and-dropwxpythonwxwidgets
Landon Kuhn
Landon Kuhn

Reputation: 78471

wxpython: How do I examine dragged data in OnDragOver?

I'm a bit perplexed by drag and drop in wxPython (but perhaps this questions pertains to drag and drop in other GUI frameworks as well). The frameworks provides a couple of callbacks (OnEnter and OnDragOver) that purportedly allow me to inform the system whether the current mouse position is a valid place to drop whatever it is that is being dragged. From these methods I can return wx.DragNone, wx.DragCopy, etc. What baffles me is that from within these methods I am not allowed to call GetData, which means I am not allowed to examine the data that the user is dragging. If I cannot see the data, how am I supposed to know whether it is OK for the user to drop here?

Upvotes: 6

Views: 626

Answers (2)

Dzinx
Dzinx

Reputation: 57864

There is no way to see dragged data in OnEnter and OnDragOver methods.

The only solution I found is to store the dragged item in some instance variable that is then readable inside these methods.

Upvotes: 1

Landon Kuhn
Landon Kuhn

Reputation: 78471

One solution, which is a hack of limited usefulness, is when a drag is initiated, store the dragged data in a global or static reference somewhere. This way, in the OnEnter and OnDragOver handlers, it is possible to get a reference to the data being dragged. This is of course only useful for drags within the same application (the same instance of the application, actually).

Upvotes: 1

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