QHexView does not support Qt5.7 about qhexview

[T-640]

There is actually at least one good reason to support older versions: they are licensed under LGPL version 2. Halfway through they changed it to version 3 which, as far as I understand, makes it nearly impossible to write commercial software for mobile phones and pretty much anything other than desktop computers, unless you pay them, of course.

And not that it matters that much, but these older versions support Windows XP and have pre-built binaries for x86 Linux. Plenty of old but still perfectly functioning hardware is still around.

[Dax89]

Afaik there is no problem to select an older version of Qt and keep compatibility with it.

I can try to keep backward compatibility with Qt 5.6 which is an LTS (even if it is unsupported).

[T-640]

Yea, this should be quite easy, QByteArray::toHex is the only function in QHexView that prevents compilation with older versions as far as I remember, and writing an equivalent for it should be pretty straightforward.

[Dax89]

I've removed toHex() call from the widget, check this branch: https://github.com/Dax89/QHexView/tree/5.0 I will move it to master this week.

If there is some other code that breaks backward compatibility, let me know

[T-640]

I have successfully compiled QHexView 5.0 with Qt 5.6.3.