Background color and macOS Terminal

[jplwill]

I'm at the point in the tutorial where the status and message lines are first added:

https://github.com/pflenker/hecto-tutorial/tree/draw-status-bar

The code is supposed to draw a status bar by outputting spaces with the desired background color. Instead, the status bar just looks like the terminal's normal background color; and on the first keypress, all of the text is displayed in a darker color. I've determined that if I comment out the call to Terminal::set_bg_color(STATUS_BG_COLOR); in draw_status_bar, it doesn't do this.

const STATUS_BG_COLOR: color::Rgb = color::Rgb(239, 239, 239);

    pub fn set_bg_color(color: color::Rgb) {
        print!("{}", color::Bg(color));
    }

I'm running on macOS using the built-in Terminal app; which says it handles ANSI colors, and which termion has been driving just fine.

[Philipp]

Hi there, thanks for opening the issue!
Can you please verify that this issue persists after performing the following steps:

• clone this repo, e.g. with git clone [e-mail]:pflenker/hecto-tutorial.git
• checkout the tag with git checkout draw-status-bar
• running it with cargo run?

Thanks!

[jplwill]

Yes, it still happens. FWIW, Cargo.lock says I have termion 1.5.3. (BTW, excellent tutorial; quite impressed.)

[jplwill]

The problem appears to be related to the color: color::Rgb(239, 239, 239). If I use the standard colors, e.g., color::Red, color::Green, it works. I suspect the macOS terminal only supports the 16 standard ANSI colors. (The preferences dialog lets you pick the precise colors you want for each, so that kind of makes sense: you ask for color::Red and you get the precisely color from the matching slot, given the theme.

[jplwill]

I'm going to use termion::style::Invert/termion::style::Reset instead of setting the background color.

[Philipp]

Thanks, I'll update the tutorial text a bit to make it clearer there, too!