[Octave-bug-tracker] [bug #50317] warning 'invalid operation' when using zoom on Qt figure

[Rik]

URL:
  <http://savannah.gnu.org/bugs/?50317>

                 Summary: warning 'invalid operation' when using zoom on Qt
figure
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Wed 15 Feb 2017 09:26:16 AM PST
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.0
        Operating System: Any

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Details:

If the property "graphicssmoothing" has been changed to "off", then using the
mouse-driven zoom box within a Qt figure causes a warning to be issued.


warning: opengl_renderer: Error 'invalid operation' (1282) occurred in
init_gl_context


Code to reproduce:


close all
graphics_toolkit qt
plot (1:10)
set (gcf, "graphicssmoothing", "off")
## Now use mouse to select zoom operation and draw a zoom box inside the
## plot window.







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