Expose setting a Window Icon

examples/window-icon/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "window-icon"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+im.workspace = true
+floem = { path = "../.." }
+image = "0.25"
+nsvg = "0.5"

examples/window-icon/src/main.rs

@@ -0,0 +1,100 @@
+use floem::{
+    close_window,
+    event::{Event, EventListener},
+    keyboard::{Key, NamedKey},
+    kurbo::Size,
+    new_window,
+    views::{button, label, v_stack, Decorators},
+    window::{Icon, WindowConfig, WindowId},
+    Application, IntoView, View,
+};
+use std::path::Path;
+
+fn sub_window_view(id: WindowId) -> impl IntoView {
+    v_stack((
+        label(move || String::from("This window has an icon from an SVG file."))
+            .style(|s| s.font_size(30.0)),
+        button(|| "Close this window").on_click_stop(move |_| {
+            close_window(id);
+        }),
+    ))
+    .style(|s| {
+        s.flex_col()
+            .items_center()
+            .justify_center()
+            .width_full()
+            .height_full()
+            .gap(0.0, 10.0)
+    })
+}
+
+fn app_view() -> impl IntoView {
+    let view = v_stack((
+        label(move || String::from("This window has an icon from a PNG file"))
+            .style(|s| s.font_size(30.0)),
+        button(|| "Open another window").on_click_stop(|_| {
+            let svg_icon = load_svg_icon(include_str!("../assets/ferris.svg"));
+            new_window(
+                sub_window_view,
+                Some(
+                    WindowConfig::default()
+                        .size(Size::new(600.0, 150.0))
+                        .title("Window Icon Sub Example")
+                        .window_icon(svg_icon),
+                ),
+            );
+        }),
+    ))
+    .style(|s| {
+        s.flex_col()
+            .items_center()
+            .justify_center()
+            .width_full()
+            .height_full()
+            .gap(0.0, 10.0)
+    });
+
+    let id = view.id();
+    view.on_event_stop(EventListener::KeyUp, move |e| {
+        if let Event::KeyUp(e) = e {
+            if e.key.logical_key == Key::Named(NamedKey::F11) {
+                id.inspect();
+            }
+        }
+    })
+}
+
+fn main() {
+    let png_icon_path = concat!(env!("CARGO_MANIFEST_DIR"), "./assets/ferris.png");
+    let png_icon = load_png_icon(Path::new(png_icon_path));
+
+    Application::new()
+        .window(
+            |_| app_view(),
+            Some(
+                WindowConfig::default()
+                    .size(Size::new(800.0, 250.0))
+                    .title("Window Icon Example")
+                    .window_icon(png_icon),
+            ),
+        )
+        .run();
+}
+
+fn load_png_icon(path: &Path) -> Icon {
+    let (icon_rgba, icon_width, icon_height) = {
+        let image = image::open(path)
+            .expect("Failed to open icon path")
+            .into_rgba8();
+        let (width, height) = image.dimensions();
+        let rgba = image.into_raw();
+        (rgba, width, height)
+    };
+    Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")
+}
+
+fn load_svg_icon(svg: &str) -> Icon {
+    let svg = nsvg::parse_str(svg, nsvg::Units::Pixel, 96.0).unwrap();
+    let (icon_width, icon_height, icon_rgba) = svg.rasterize_to_raw_rgba(1.0).unwrap();
+    Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")
+}

src/app_handle.rs

@@ -291,10 +291,14 @@ impl ApplicationHandle {
             if let Some(title) = config.title {
                 window_builder = window_builder.with_title(title);
             }
+            if let Some(window_icon) = config.window_icon {
+                window_builder = window_builder.with_window_icon(Some(window_icon));
+            }
             config.apply_default_theme.unwrap_or(true)
         } else {
             true
         };
+
         let result = window_builder.build(event_loop);
         let window = match result {
             Ok(window) => window,

src/window.rs

@@ -1,4 +1,5 @@
 pub use floem_winit::window::Fullscreen;
+pub use floem_winit::window::Icon;
 pub use floem_winit::window::ResizeDirection;
 pub use floem_winit::window::Theme;
 pub use floem_winit::window::WindowButtons;
@@ -16,7 +17,7 @@ pub struct WindowConfig {
     pub(crate) show_titlebar: Option<bool>,
     pub(crate) transparent: Option<bool>,
     pub(crate) fullscreen: Option<Fullscreen>,
-    pub(crate) window_icon: Option<bool>,
+    pub(crate) window_icon: Option<Icon>,
     pub(crate) title: Option<String>,
     pub(crate) enabled_buttons: Option<WindowButtons>,
     pub(crate) resizable: Option<bool>,
@@ -50,7 +51,7 @@ impl WindowConfig {
         self
     }
 
-    pub fn window_icon(mut self, window_icon: bool) -> Self {
+    pub fn window_icon(mut self, window_icon: Icon) -> Self {
         self.window_icon = Some(window_icon);
         self
     }