How to get DnD to work in GTKD?

[Joseph]

On Saturday, 16 September 2017 at 14:33:53 UTC, Mike Wey wrote:
> On 16-09-17 06:33, Joseph wrote:
>> 
>> I've used null in place of [te]. I'm not sure what target 
>> entry is for and if that is the problem or what. I am trying 
>> to drag files from windows explorer to a grid or label(I 
>> duplicated the code above for the label) and none the 
>> callbacks are ever called. I only need the filename of the 
>> file being dragged.
>> 
>> I will eventually also need to drag one list element to 
>> another(virtually so, I just need to know the index that was 
>> dragged).
>> 
>> Thanks.
>
> You will also need to set an TargetList to tell gtk that you 
> want to receive text:
>
> ```
> TargetList lst = new TargetList([]);
> lst.addTextTargets(0);
>
> w..dragDestSetTargetList(lst);
> ```
>
> for simple cases only `addOnDragDataReceived` will be needed, 
> `addOnDragDataGet` is only used for the source and 
> `addOnDragDrop` can be used to filter the things that can be 
> droped.
>
> List and Treeviews there are funtions like `getDragDestRow` 
> available with the TreeView widget.

Any ideas on this? I can drag text in the app itself to the app 
but I can't drag outside of the app, e.g., a file from windows 
explorer.

This is the code:

	TargetEntry te = new TargetEntry("audio", 
GtkTargetFlags.OTHER_APP, 0);
	TargetList lst = new TargetList([]);
	lst.addImageTargets(1, false);
	lst.addTextTargets(0);

	// Add drag and drop for audio files

	w.dragDestSet(GtkDestDefaults.ALL, null, GdkDragAction.COPY);
	w.dragDestSetTargetList(lst);
	w.addOnDragDataReceived((dragContext, x, y, selectionData, info, 
time, widget)
														  {
															// TODO: Add drag and drop
															writeln("ok2");
														  });

ok2 is printed only when I drag from inside the app to inside the 
app(works with text, not sure if anything else as I didn't try 
it) but can't seem to get anything from the outside to come in ;/ 
Give that OTHER_APP is set I'd expect at least text outside the 
app to be draggable in to it, but that is not the case(I get the 
'no sign' for that one, while for files I get the drag icon).