custom widget displaying "hex" representation (based on Scintilla) on the left,
TextEditor on the right,
will have its own plugin menu which will allow to open file and display it in hex editor,
only "visible" part of file is loaded (?),
text editor displays only ASCII text and all other data bytes (including for example newlines) are displayed as dots, for example when we have utf-8 text "člověk" then text editor on the right will show "..lov..k"
How it will work:
Tabclass,TextEditoron the right,https://github.com/virinext/QHexView