Changing Ui subcomponent from Rust.

[loloof64]

Hi !

I'm defining a component in the UI side, in a file named chessboard.slint

export component ChessBoard {
    in property <[[string]]> pieces: [
        ["r", "n", "b", "q", "k", "b", "n", "r"],
        ["p", "p", "p", "p", "p", "p", "p", "p"],
        ["", "", "", "", "", "", "", ""],
        ["", "", "", "", "", "", "", ""],
        ["", "", "", "", "", "", "", ""],
        ["", "", "", "", "", "", "", ""],
        ["P", "P", "P", "P", "P", "P", "P", "P"],
        ["R", "N", "B", "Q", "K", "B", "N", "R"],
    ];

   // other code defined in it
    
   }

in the application windows script, I'm using it as a sub component

export component AppWindow inherits Window {
   width: 900px;
   height: 900px;

   board:= ChessBoard {
       size: 500px;
       reversed: false;
       whiteTurn: false;
   }
}

But I wonder how to set the pieces of the board variable from Rust, I mean how I can access the board variable from the main function ?

fn main() -> Result<(), slint::PlatformError> {
   let ui = AppWindow::new()?;

   let ui_handle = ui.as_weak();
   ui.??? // How to change the pieces values of the board variable here ? I mean how to access the board variable from here ?

   ui.run()
}

[ogoffart]

You can either forward the properties to the root component like so:

export component AppWindow inherits Window {
   in property pieces <=> board.pieces;
   
   board:= ChessBoard {
       // ...
   }
}

Or you use a global: https://slint.dev/releases/1.3.2/docs/slint/src/language/syntax/globals

[loloof64]

Thank you very much.

Using the properties forwarding is fine for me. 😃