[FAQ] Center on screen

[XakepSDK]

Window spawns in top left corner. I want my window be centered on screen. How do i make it spawn centered on screen?

I thought about manually centering window, but i haven't found a way to get screen resolution. Also i heard that wayland does not let you know your screen resolution.

[kivimango]

The problem is getting the screen size in a cross-platform way.
If the target platform is not webASM then you could use
orbclient::get_display_size()
in one of your widget's state init method(), ask the entity of the window with

let window = ctx.window();
// get the window position property, maybe not like this, i cant recall exactly now
let window_x = ctx.widget(window).get("position").clone().x();
let window_x = ctx.widget(window).get("position").clone().y();

then

match orbclient::get_display_size() {
            Ok(screen_size) => {
                self.x = (screen_size.0 - window_width) / 2;
                self.y = (screen_size.1 - window_height) / 2;
                /// set window's positon property values of x and y
            }
            Err(msg) => {
                eprintln!("Cannot determine screen size: {}", msg);
            }

(I just implemented centering on my own lib, i will try port it to back orbtk when i have some time)
https://github.com/kivimango/mygui/blob/main/src/widget/window.rs#L68