Any way to set program logo?

[CodeCanna]

Is there a way to set the logo of the program running in the bottom menu bar?

[marci1175]

Hi!
When you want to set the icon at the application startup you can set the default icon by settings the icon field of the ViewportBuilder in the NativeOptions, when creating an eframe window.
Example code:

//Initalize the `NativeOptions` struct
let native_options = eframe::NativeOptions {
    //Set the viewport field  
    viewport: ViewportBuilder {
            //Set the icon field
            icon: Some(std::sync::Arc::new(egui::IconData {
                rgba: image::load_from_memory(include_bytes!("../../path/to/image.png"))
                    .unwrap()
                    .to_rgba8()
                    .to_vec(),
                width: 1024,
                height: 1024,
            })),
            //Set the rest of the fields to the `Default` value
            ..Default::default()
        },
    //Set the rest of the fields to the `Default` value
    ..Default::default()
};

//Create eframe window
eframe::run_native("My egui App", native_options, Box::new(|cc| Ok(Box::new(MyEguiApp::new(cc)))));

If you wanted to set the application icon runtime, from the application you can use the ctx.send_viewport_cmd function.
Example code:

//This is the update function of your egui application / eframe window.
fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
    //Set icon image
    if ui.button("Change Icon").clicked() {
        ctx.send_viewport_cmd(ViewportCommand::Icon(
            Some(std::sync::Arc::new(egui::IconData {
                rgba: image::load_from_memory(include_bytes!("../../path/to/image.png"))
                    .unwrap()
                    .to_rgba8()
                    .to_vec(),
                width: 1024,
                height: 1024,
            }))
        ))
    }
    //Reset icon image
    if ui.button("Reset Icon").clicked() {
        ctx.send_viewport_cmd(ViewportCommand::Icon(
            None
        ))
    }
}

This is how I set the Icon in my app, but there are other ways to do it if this one doesn't suit your needs. :)
If you don't understand something or if the code doesn't work, feel free to ask me in the future!