This variable sets the maximum input length of the TextInput window on GDK platforms.
Defined in <SDL3/SDL_hints.h>
#define SDL_HINT_GDK_TEXTINPUT_MAX_LENGTH "SDL_GDK_TEXTINPUT_MAX_LENGTH"
The value must be a stringified integer, for example "10" to allow for up to 10 characters of text input.
This hint is available only if SDL_GDK_TEXTINPUT defined.
This hint should be set before calling SDL_StartTextInput()
This hint is available since SDL 3.0.0.