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1. CONFUSSED WITH DnD

#3473

Posted by: 2004-03-08 04:59:54

I can't get drag and drop to work with my program.
First off, how do I accossiate data for wxDropTarget? I have been trying to put

wxFileDataObject

as the first paramater for the wxDropTarget; however, when I try to use use the wxDropTarget in SetDropTarget, Dev-C++ gives me an error that says there is no matching function for call to ' MainFrame::SetDropTarget( wxDropTarget*(&)(wxFileDataObject (*)()))'

Thanks, any help will be immensly appreciated

2. Re: CONFUSSED WITH DnD

#4490

Posted by: str3l0k 2004-06-16 21:05:36

You need to derrive you class from wxDropTarget... There you need to override
some functions: OnData, OnDrop...
...MyDropTarget : public wxDropTarget...

then you need to make you window, able to receive drops on it...
i do this just after i create a window:


MyDropTarget * dropTarget = new MyDropTarget(this);  //this - as parent
dropTarget->SetDataObject(new wxFileDataObject());   //sets what format will our dropTarget like.
myDnDTargetWindow->SetDropTarget(dropTarget); //Enable droping objects on this window...

Now in MyDropTarget::OnData you can do whatever you want with the data received...

If you want to drag something you need to create a DropSource


    wxFileDataObject my_data(&data); //The object being dragged
    //init the my_data here with the values you want to drag...
    CDropSource dragSource( this ); //create drop source
    dragSource.SetData( my_data ); //set the data being draged to the source
    dragSource.DoDragDrop( TRUE ); //start dragging...

Please note that this code might not be very correct... It's just what i came up to for my project :) Also take a look at DnD sample from wxWidgets samples.

It's a little too much in that sample, but you can still learn from it...

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