[Octave-bug-tracker] [bug #50295] Calling feval() from within the Qt GUI requires to press enter otherwise the prompt is busy

[Mike Miller]

Follow-up Comment #9, bug #50295 (project octave):

I'm sorry I don't really understand what the data cursor on a plot has to do
with what is printed to the command window or whether the user has to press
Enter.

As I understand it the data cursor is a tooltip that appears on a figure
window when the figure area is clicked. I don't see how that requires any kind
of display or interaction on the command window. If it's just for debugging
while implementing this function, then I don't see any problem with the
current behavior.

If pressing Enter in the command window is required to somehow get the tooltip
to appear on the figure window, then that looks like a different problem from
just getting the prompt to be redrawn. You may have run into a different
problem and assumed that it's for the same reasons as what you describe here,
while the example shown here doesn't seem to be a bug at all.

It seems more likely to me that it's because you are calling an m file
function that sends a signal to the Qt figure thread to draw a text box.
Instead maybe the data cursor should be done entirely in libgui without making
such a callback to the interpreter.

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