Merge remote-tracking branch 'origin/master' into feat/multi-window-support

# Conflicts:
#	Cargo.toml
#	core/src/window/icon.rs
#	core/src/window/id.rs
#	core/src/window/position.rs
#	core/src/window/settings.rs
#	examples/integration/src/main.rs
#	examples/integration_opengl/src/main.rs
#	glutin/src/application.rs
#	native/src/subscription.rs
#	native/src/window.rs
#	runtime/src/window/action.rs
#	src/lib.rs
#	src/window.rs
#	winit/Cargo.toml
#	winit/src/application.rs
#	winit/src/icon.rs
#	winit/src/settings.rs
#	winit/src/window.rs

winit/src/conversion.rs

@@ -1,12 +1,13 @@
 //! Convert [`winit`] types into [`iced_native`] types, and viceversa.
 //!
 //! [`winit`]: https://github.com/rust-windowing/winit
-//! [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
-use crate::keyboard;
-use crate::mouse;
-use crate::touch;
-use crate::window;
-use crate::{Event, Point, Position};
+//! [`iced_native`]: https://github.com/iced-rs/iced/tree/0.9/native
+use crate::core::keyboard;
+use crate::core::mouse;
+use crate::core::touch;
+use crate::core::window;
+use crate::core::{Event, Point};
+use crate::Position;
 
 /// Converts a winit window event into an iced event.
 pub fn window_event(
@@ -149,6 +150,19 @@ pub fn window_event(
     }
 }
 
+/// Converts a [`window::Level`] to a [`winit`] window level.
+///
+/// [`winit`]: https://github.com/rust-windowing/winit
+pub fn window_level(level: window::Level) -> winit::window::WindowLevel {
+    match level {
+        window::Level::Normal => winit::window::WindowLevel::Normal,
+        window::Level::AlwaysOnBottom => {
+            winit::window::WindowLevel::AlwaysOnBottom
+        }
+        window::Level::AlwaysOnTop => winit::window::WindowLevel::AlwaysOnTop,
+    }
+}
+
 /// Converts a [`Position`] to a [`winit`] logical position for a given monitor.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
@@ -228,7 +242,7 @@ pub fn mode(mode: Option<winit::window::Fullscreen>) -> window::Mode {
 /// Converts a `MouseCursor` from [`iced_native`] to a [`winit`] cursor icon.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
-/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
+/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.9/native
 pub fn mouse_interaction(
     interaction: mouse::Interaction,
 ) -> winit::window::CursorIcon {
@@ -246,21 +260,20 @@ pub fn mouse_interaction(
             winit::window::CursorIcon::EwResize
         }
         Interaction::ResizingVertically => winit::window::CursorIcon::NsResize,
+        Interaction::NotAllowed => winit::window::CursorIcon::NotAllowed,
     }
 }
 
 /// Converts a `MouseButton` from [`winit`] to an [`iced_native`] mouse button.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
-/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
+/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.9/native
 pub fn mouse_button(mouse_button: winit::event::MouseButton) -> mouse::Button {
     match mouse_button {
         winit::event::MouseButton::Left => mouse::Button::Left,
         winit::event::MouseButton::Right => mouse::Button::Right,
         winit::event::MouseButton::Middle => mouse::Button::Middle,
-        winit::event::MouseButton::Other(other) => {
-            mouse::Button::Other(other as u8)
-        }
+        winit::event::MouseButton::Other(other) => mouse::Button::Other(other),
     }
 }
 
@@ -268,7 +281,7 @@ pub fn mouse_button(mouse_button: winit::event::MouseButton) -> mouse::Button {
 /// modifiers state.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
-/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
+/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.9/native
 pub fn modifiers(
     modifiers: winit::event::ModifiersState,
 ) -> keyboard::Modifiers {
@@ -295,7 +308,7 @@ pub fn cursor_position(
 /// Converts a `Touch` from [`winit`] to an [`iced_native`] touch event.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
-/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
+/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.9/native
 pub fn touch_event(
     touch: winit::event::Touch,
     scale_factor: f64,
@@ -326,7 +339,7 @@ pub fn touch_event(
 /// Converts a `VirtualKeyCode` from [`winit`] to an [`iced_native`] key code.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
-/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
+/// [`iced_native`]: https://github.com/iced-rs/iced/tree/0.9/native
 pub fn key_code(
     virtual_keycode: winit::event::VirtualKeyCode,
 ) -> keyboard::KeyCode {
@@ -519,6 +532,15 @@ pub fn user_attention(
     }
 }
 
+/// Converts some [`Icon`] into it's `winit` counterpart.
+///
+/// Returns `None` if there is an error during the conversion.
+pub fn icon(icon: window::Icon) -> Option<winit::window::Icon> {
+    let (pixels, size) = icon.into_raw();
+
+    winit::window::Icon::from_rgba(pixels, size.width, size.height).ok()
+}
+
 // As defined in: http://www.unicode.org/faq/private_use.html
 pub(crate) fn is_private_use_character(c: char) -> bool {
     matches!(