Shows how to use idle event with Fl::add_idle method.
To build this project, open "Terminal" and type following lines:
mkdir build && cd build
cmake ..
start Application_Idle.slnSelect Application_Idle project and type Ctrl+F5 to build and run it.
mkdir build && cd build
cmake .. -G "Xcode"
open ./Application_Idle.xcodeprojSelect Application_Idle project and type Cmd+R to build and run it.
mkdir build && cd build
cmake ..
cmake --build . --config Debug
./Application_Idle