[skirino]

Hi,

I'm writing a simple application that uses TreeView and ListStore and now I want to add drag and drop functionality.
So I used TreeView.enableModelDragDest and TreeView.enableModelDragSource, and made a derived class of ListStore that implements functions in TreeDragDestIF and TreeDragSourceIF.
But unfortunately it doesn't work, the functions of my derived class are not called when a row is dragged.

Am I missing something important?
How should I implement drag and drop in TreeView?

Thanks in advance.

[Mike Wey]

Implementing interfaces is difficult in gtkD at the moment.

You can see in http://www.dsource.org/projects/gtkd/browser/trunk/src/gtk/TreeModel.d how the treemodel interface is implemented.

[skirino]

Thanks to the reply, now I understand (to some extent) the difficulty to bridge the gap between D's interfaces and GObject's interfaces.

I tried in many ways but the implementation in TreeModel.d is probably not directly applicable to my purpose (to override ListStore's methods that belong to TreeDragDestIF and TreeDragSourceIF).
In the meantime I need to learn about the type system of GObject and how vtables for interfaces are treated internally.