Add support for setting window icon

This adds a new property from Settings::window::iconand a Icon struct which can be converted to winit::window::Icon.

It also adds code to display this icon in Application::run. Due to the fact that the Icon struct is non copyable, I also had to remove the Copy trait from all Settings, both in `iced` and `iced_winit`.

src/settings.rs

@@ -2,7 +2,7 @@
 use crate::window;
 
 /// The settings of an application.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Settings<Flags> {
     /// The window settings.
     ///

src/window/settings.rs

@@ -1,5 +1,5 @@
 /// The window settings of an application.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Settings {
     /// The initial size of the window.
     pub size: (u32, u32),
@@ -15,6 +15,9 @@ pub struct Settings {
 
     /// Whether the window should have a border, a title bar, etc. or not.
     pub decorations: bool,
+
+    /// The window icon, which is also usually used in the taskbar
+    pub icon: Option<iced_winit::settings::Icon>,
 }
 
 impl Default for Settings {
@@ -25,6 +28,7 @@ impl Default for Settings {
             max_size: None,
             resizable: true,
             decorations: true,
+            icon: None,
         }
     }
 }
@@ -38,6 +42,7 @@ impl From<Settings> for iced_winit::settings::Window {
             max_size: settings.max_size,
             resizable: settings.resizable,
             decorations: settings.decorations,
+            icon: settings.icon,
             platform_specific: Default::default(),
         }
     }

winit/src/lib.rs

@@ -38,5 +38,6 @@ pub use clipboard::Clipboard;
 pub use mode::Mode;
 pub use proxy::Proxy;
 pub use settings::Settings;
+pub use settings::Icon;
 
 pub use iced_graphics::Viewport;

winit/src/settings.rs

@@ -14,7 +14,7 @@ use winit::monitor::MonitorHandle;
 use winit::window::WindowBuilder;
 
 /// The settings of an application.
-#[derive(Debug, Clone, Copy, PartialEq, Default)]
+#[derive(Debug, Clone, PartialEq, Default)]
 pub struct Settings<Flags> {
     /// The [`Window`] settings
     ///
@@ -28,7 +28,7 @@ pub struct Settings<Flags> {
 }
 
 /// The window settings of an application.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Window {
     /// The size of the window.
     pub size: (u32, u32),
@@ -45,6 +45,9 @@ pub struct Window {
     /// Whether the window should have a border, a title bar, etc.
     pub decorations: bool,
 
+    /// The window icon, which is also usually used in the taskbar
+    pub icon: Option<Icon>,
+
     /// Platform specific settings.
     pub platform_specific: platform::PlatformSpecific,
 }
@@ -66,6 +69,7 @@ impl Window {
             .with_inner_size(winit::dpi::LogicalSize { width, height })
             .with_resizable(self.resizable)
             .with_decorations(self.decorations)
+            .with_window_icon(self.icon.map(Icon::into))
             .with_fullscreen(conversion::fullscreen(primary_monitor, mode));
 
         if let Some((width, height)) = self.min_size {
@@ -99,7 +103,38 @@ impl Default for Window {
             max_size: None,
             resizable: true,
             decorations: true,
+            icon: None,
             platform_specific: Default::default(),
         }
     }
 }
+
+/// An Icon
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Icon {
+    rgba: Vec<u8>,
+    width: u32,
+    height: u32,
+}
+
+impl Icon {
+    ///
+    pub fn new(rgba: &[u8], width: u32, height: u32) -> Self {
+        Self {
+            rgba: rgba.to_vec(),
+            width,
+            height,
+        }
+    }
+}
+
+impl Into<winit::window::Icon> for Icon {
+    fn into(self) -> winit::window::Icon {
+        winit::window::Icon::from_rgba(
+            self.rgba.to_vec(),
+            self.width,
+            self.height,
+        )
+        .unwrap()
+    }
+}