[Octave-bug-tracker] [bug #51645] zoom to singular region dumps core

[Dan Sebald]

Follow-up Comment #5, bug #51645 (project octave):

In general what you are saying is true, but I don't know if the double-click
is causing a return to the original plot exactly.  It seems to me the plot is
return to the first zoomed plot, not the original.  That is, with Z+ active:


<press "Autoscale">
plot goes to original
DOUBLE-CLICK somewhere on plot
plot zooms, then redraws to the same location (call that ZOOM1)
DOUBLE-CLICK
plot zooms to ZOOM2, then goes back to ZOOM1
SINGLE-CLICK
plot zooms to ZOOM2
DOUBLE-CLICK
plot zooms to ZOOM3, then goes back to ZOOM1
<press "Autoscale">
plot goes back to original


I suppose there could be a more useful zooming pattern.  Nonetheless, if you
find this inability to differentiate the single click from a pending double
click nauseating, I think the way to handle that is to use a Qt timer with
doubleClickInterval() to call the single-click operation, and if the
doubleclick event comes just cancel the timer so that the single-click
operation isn't done.  (Clearly the single click operation is done on the
Release event because pressing without releasing goes into zoom-box mode.)

https://wiki.python.org/moin/PyQt/Distinguishing%20between%20click%20and%20double%20click

Can you think of a preferred behavior?

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