Odd behavior of GLDisplay plugin

[Former user]

When initializing a GLDisplay window at certain positions it clearly appears to be at the wrong place.

Example: mydisp = dataIO("GLDisplay",0,0,50,50) # does not start at the (0,0) position.

Shifting the window in x- or y-direction by one pixel does not always show the expected result.

The issue does not appear in itom 3.1

[M. Gronle]

The dispWindow plugin seems to have the same or a similar problem.

[M. Gronle]

As a temporary workaround it is possible to set the parameters x0 and y0 to the desired value after having initialized the plugin:

mydisp = dataIO("GLDisplay",0,0,50,50)
mydisp.setParam("x0", 0)
mydisp.setParam("y0", 0)

‌

[M. Gronle]

dispWindow: projWindow class now inherits from QOpenGLWidget instead of the deprecated QGLWidget. This fixes issue #15.

→ <<cset 667a5294cc71>>

[M. Gronle]

This issue has also been fixed by the commits e9f6a4b and 40af382