Thanks, sounds a bit complicated, so I have to give it some thoughts.
For now, it is enough.

-Pim

Yes, it works great.

Some questions:

• does HandleMouseDrag() now replace MouseDrag(), MouseDragStart() and others.

• how to get the mouse coordinates where the drag started.
  Or better, I will have some pictures in the UA, how to know which picture is being dragged&dropped?

• where and when to call self.SetDragDestination(c4d.MOUSE_CROSS).
  Just before HandleMouseDrag in InputEvent()?

• HandleMouseDrag() is in the UA InputEvent().
  For which message ID should I look before starting HandleMouseDrag().
  In my InputEvent() function also other messages are handled.

I have User Area with some images.
Now I want to drag&drop one of those images in the UA to a Gui field, so I can get the filename of the chosen image.
Something like this.
.

Questions:

• what kind of field should the Gui field be.
  A link field (top right field) or a simple text field (2e top right field)?
• how to initiate a drag&drop in the UA?
• how to know the image is dropped on the gui field?
• should the field, where the image should be dropped (the gui field), also be an UA?

Hope you can help me with a example.

-Pim

Or an easier request.
I know I can drag objects to the treeview, but is it also possible to drag object from a treeview to (for example) a link field?

Is there somewhere an example available?

@mp5gosu said in Treeview and Right Click:

RemoveData()

Great, thanks.

I implemented a treeview and it is working great.
I like to know whether it is possible to Drag&Drop an object (in this case a link to a image file) from the treeview to (for example) the color channel of a material in the Material Editor?

I implemented a treeview and it is working ok.
Now I want to add the right click function.
Right click opens a context menu, so I need to add my own menu item to the context menu. That is working too.

Except I do not know how to remove the the default context menu items (Remove and Remove All).

I read this in the manual.

Thanks, great explanation!
One small issue. Delete doesn't work because objParent' is not defined.

Traceback (most recent call last):
File "scriptmanager", line 251, in DeletePressed
NameError: global name 'objParent' is not defined

Here the code that, I think, solves the issue:

    def DeletePressed(self, root, userdata):
        "Called when a delete event is received."
        for tex in reversed(list(TextureObjectIterator(self.listOfTexture))):
            if tex.IsSelected:
                objParent = tex.GetParent()               # Added
                listToRemove = objParent.GetChildren() if objParent is not None else self.listOfTexture
                listToRemove.remove(tex)

Thanks, it is clear to me now.
I am using str(opUuid).encode("hex") now.

Ok, after some more reading I now understand that I should insert the object in the listview myself.

    def InsertObject(self, root, userdata, obj, dragtype, dragobject, insertmode, bCopy):
        self.listOfTexture.append(dragobject)
        return True

But now it is inserted at the end (makes sense, because I use an append()).
My question is how to insert the new object under another one?

Something like this.

I am trying to make treeview of a folder with its subfolders and files.