[Octave-bug-tracker] [bug #44676] ginput() does not return mouse button value with Qt

[Rik]

Update of bug #44676 (project octave):

                 Summary: ginput() does not return mouse button value =>
ginput() does not return mouse button value with Qt

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Follow-up Comment #7:

I think we have a small Matlab incompatibility here.  Matlab's
WindowButtonDownFcn is just a callback without arguments.  In Octave, the file
ginput.m expects that the first argument to the callback is the button
number.


function ginput_windowbuttondownfcn (src, button)
  point = get (gca (), "currentpoint");
  ginput_accumulator (1, point(1,1), point(1,2), button);
endfunction


And in __init_fltk__.cc   


if (fp.get_windowbuttondownfcn ().is_defined ())
     fp.execute_windowbuttondownfcn (Fl::event_button ());


so it works for FLTK.

In Canvas.cc, however,


          gh_manager::post_callback (figObj.get_handle (),
                                     "windowbuttondownfcn");

          gh_manager::post_callback (currentObj.get_handle (),
                                     "buttondownfcn", button_number (event));


so it doesn't work for Qt.

Easiest solution would be to add "button_number (event)" to the
windowbuttondownfcn callback.

Alternatively, we can do what Matlab user's would do and check the
"SelectionType" property of current figure to determine if it was "normal",
"extended", or "alt".




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