Migrate LCNC UI from 2.6 to 2.8

Hallo,
I would like to upgrade LinuxCNC 2.6 to 2.8 There is a custom UI, coded in Qt C++ and it seems, there are many changes in 2.8. Is anybody here who can help me? I cannot find any nice documentation or example in C++, only some Python. For example, hal_pin_t struct seems doesn't exist in 2.8 Which libraries I should include in my project to be able to connect to HAL and send messages to LCNC? shcom.cc I also cannot find in 2.8

try these....  forum.linuxcnc.org/47-hal-examples/44874...rs-tutorial-sort-off

Hallo,
I would like to ask if it is possible to get parameters of all tools in tooltable? There was possible to get it this way: emcStatus->io.tool.toolTable[pocket].diameter, but in LCNC latest version it seems, you can get data from current tool in spindle only: emcStatus->io.tool.toolTableCurrent.diameter, toolTable[pocket] doesn't exist anymore. Is there any solution? I have found, I should work with tooltable file only, but I don't like this way too much.