dynamically change to window size ?

[timsaya]

Hello , everyone .

I am using slint hope to develop a video player , I need change the window to fit video size when I load the video file . Is there having something like life cycle that can change the window size on first ? or according to my function have else comment ？

I know we can use the winit API to set window size ,but it will lose slint animate (width ,height) .

export component ReelRosUI inherits Window {
    in-out property <Page> page: Welcome;
    in-out property <string> bag-path;
    callback open-file();

    background: page == Page.Welcome ? transparent : #000000;

    preferred-width: 640px;
    preferred-height: 360px;

    animate height, width { duration: 1s; }

    if page == Page.Welcome: welcome-view := WelcomeView {
        width: root.width;
        height: root.height;
        open-file => {
            root.open-file();
            // if I change window size here , the WelcomeView will change size to 1920x1080 . Because the open-file is async ?
            // root.height = 1080px;
            // root.width = 1920px;
        }
    }
    if page == Page.Player: player-view := PlayerView {
        width: root.width;
        height: root.height;
        bag-path: root.bag-path;
    }
}

2025-07-31.21.06.44.mov