I have to write a desktop map application using c++ and openseamap. Right now I am looking for a GUI library for this. I thought I could use qt5 for this, but I can't be sure before the start I must make sure that ı can use qt and openseamap together. Can ıt be possible if not is there any succession for GUI library for use with openseamap
The openseamap just provides map files which are in a format called "MBTiles" which is actually just a SQLite database. There is no problem to use Qt for the GUI and to let such Qt application access a SQLite database. There is also SQLite support for Qt, for instance look here.
There is also Qt support for OpenStreetMap which is where OpenSeaMap bases on.