Get Screen Dimensions

[cuppajoeman]

I tried doing this:

    auto screen = ScreenInteractive::Fullscreen();

    FileLogger fl("logs.txt");

    fl << "screen dimx: " << screen.dimx() << " screen dimy: " << screen.dimy() << std::endl;

but it prints out

screen dimx: 0 screen dimy: 0

Am I using this incorrectly?

[cuppajoeman]

When I use it in this context it works properly:

    auto component = Container::Vertical({
        Renderer([&] {
            fl << "inside: screen dimx: " << screen.dimx() << " screen dimy: " << screen.dimy() << std::endl;

inside: screen dimx: 167 screen dimy: 44

I'm not exactly sure what initializes these values but I guess trying to check the value before you do anything graphical might not be the best idea.

[ArthurSonzogni]

Hello @cuppajoeman

The dimensions reported are the one from the last drawing. If you haven't drawn something 0x0 will be reported.

The dimension depends on the terminal screen dimensions, the component dimension and the ftxui::Screen config. That's why it requires drawing the component first to report the size.

To access the terminal dimension directly, you can use ftxui::Terminal::Size() instead.