window: customizable default descriptor

Cargo.toml

@@ -203,3 +203,7 @@ path = "examples/window/clear_color.rs"
 [[example]]
 name = "multiple_windows"
 path = "examples/window/multiple_windows.rs"
+
+[[example]]
+name = "window_settings"
+path = "examples/window/window_settings.rs"

crates/bevy_window/src/lib.rs

@@ -8,18 +8,22 @@ pub use system::*;
 pub use window::*;
 pub use windows::*;
 
+pub mod prelude {
+    pub use crate::{CursorMoved, Window, WindowDescriptor, Windows};
+}
+
 use bevy_app::prelude::*;
 use bevy_ecs::IntoQuerySystem;
 
 pub struct WindowPlugin {
-    pub primary_window: Option<WindowDescriptor>,
+    pub add_primary_window: bool,
     pub exit_on_close: bool,
 }
 
 impl Default for WindowPlugin {
     fn default() -> Self {
         WindowPlugin {
-            primary_window: Some(WindowDescriptor::default()),
+            add_primary_window: true,
             exit_on_close: true,
         }
     }
@@ -35,14 +39,16 @@ impl AppPlugin for WindowPlugin {
             .add_event::<CursorMoved>()
             .init_resource::<Windows>();
 
-        if let Some(ref primary_window_descriptor) = self.primary_window {
-            let mut create_window_event = app
-                .resources_mut()
-                .get_mut::<Events<CreateWindow>>()
-                .unwrap();
+        if self.add_primary_window {
+            let resources = app.resources();
+            let window_descriptor = resources
+                .get::<WindowDescriptor>()
+                .map(|descriptor| (*descriptor).clone())
+                .unwrap_or_else(|| WindowDescriptor::default());
+            let mut create_window_event = resources.get_mut::<Events<CreateWindow>>().unwrap();
             create_window_event.send(CreateWindow {
                 id: WindowId::new(),
-                descriptor: primary_window_descriptor.clone(),
+                descriptor: window_descriptor.clone(),
             });
         }
 

examples/3d/3d_scene.rs

@@ -44,13 +44,13 @@ fn setup(
         })
         // light
         .spawn(LightComponents {
-            translation: Translation::new(4.0, 5.0, -4.0),
+            translation: Translation::new(4.0, 8.0, 4.0),
             ..Default::default()
         })
         // camera
         .spawn(Camera3dComponents {
             transform: Transform::new_sync_disabled(Mat4::face_toward(
-                Vec3::new(3.0, 5.0, 8.0),
+                Vec3::new(-3.0, 5.0, 8.0),
                 Vec3::new(0.0, 0.0, 0.0),
                 Vec3::new(0.0, 1.0, 0.0),
             )),

examples/window/window_settings.rs

@@ -0,0 +1,13 @@
+use bevy::prelude::*;
+
+fn main() {
+    App::build()
+        .add_resource(WindowDescriptor {
+            title: "I am a window!".to_string(),
+            width: 300,
+            height: 300,
+            vsync: true,
+        })
+        .add_default_plugins()
+        .run();
+}

src/prelude.rs

@@ -14,6 +14,7 @@ pub use crate::{
     text::prelude::*,
     transform::prelude::*,
     type_registry::RegisterType,
+    window::prelude::*,
     ui::prelude::*,
     AddDefaultPlugins,
 };