Hello,
I want a context menu to popup when the user right-clicks on a tree view. So I looked up signal_button_press_event() and I was told to either derive my own view from TreeView (I don't want that) and override the default handler, or use connect_notify() instead.
Well, what does this mysterious function do? Googling for it turned out that it has something to do with coverting non-void return types to void return types of the signal handler (though I don't understand why this is needed at all).
Anyway, if I use this function to connect my own signal handler (as usual with sigc::mem_fun), the compiler complains about mismatching return types (the errors message is pretty long-winded, STL style, you don't want to see it I guess...).
Instead of posting the error message from g++, here's the code which caused it:
// m_view is a TreeView
m_view.signal_button_press_event().connect_notify( sigc::mem_fun( *this, &FileBrowser::on_rmb_clicked ) );
// ...
void FileBrowser::on_rmb_clicked()
{
// ...
}I don't get what's wrong here.
-- Matthias Kaeppler
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