ViewportOutput: only include parent id, as own if is the key of map

crates/eframe/src/native/run.rs

@@ -1165,7 +1165,7 @@ mod glow_integration {
             for (
                 viewport_id,
                 ViewportOutput {
-                    ids,
+                    parent,
                     builder,
                     viewport_ui_cb,
                     commands,
@@ -1173,6 +1173,8 @@ mod glow_integration {
                 },
             ) in viewport_output
             {
+                let ids = ViewportIdPair::from_self_and_parent(viewport_id, parent);
+
                 initialize_or_update_viewport(
                     &mut self.viewports,
                     ids,
@@ -2673,7 +2675,7 @@ mod wgpu_integration {
         for (
             viewport_id,
             ViewportOutput {
-                ids,
+                parent,
                 builder,
                 viewport_ui_cb,
                 commands,
@@ -2681,6 +2683,8 @@ mod wgpu_integration {
             },
         ) in viewport_output
         {
+            let ids = ViewportIdPair::from_self_and_parent(viewport_id, parent);
+
             initialize_or_update_viewport(
                 viewports,
                 ids,

crates/egui/src/context.rs

@@ -1608,7 +1608,7 @@ impl ContextImpl {
                 (
                     id,
                     ViewportOutput {
-                        ids: ViewportIdPair::from_self_and_parent(id, parent),
+                        parent,
                         builder: viewport.builder.clone(),
                         viewport_ui_cb: viewport.viewport_ui_cb.clone(),
                         commands,

crates/egui/src/viewport.rs

@@ -665,9 +665,10 @@ pub enum ViewportCommand {
 /// Describes a viewport, i.e. a native window.
 #[derive(Clone)]
 pub struct ViewportOutput {
-    /// Id of us and our parent.
+    /// Id of our parent viewport.
-    pub ids: ViewportIdPair,
+    pub parent: ViewportId,
 
+    /// The window attrbiutes such as title, position, size, etc.
     pub builder: ViewportBuilder,
 
     /// The user-code that shows the GUI, used for deferred viewports.
@@ -688,21 +689,17 @@ pub struct ViewportOutput {
 }
 
 impl ViewportOutput {
-    pub fn id(&self) -> ViewportId {
-        self.ids.this
-    }
-
     /// Add on new output.
     pub fn append(&mut self, newer: Self) {
         let Self {
-            ids,
+            parent,
             builder,
             viewport_ui_cb,
             mut commands,
             repaint_delay,
         } = newer;
 
-        self.ids = ids;
+        self.parent = parent;
         self.builder.patch(&builder);
         self.viewport_ui_cb = viewport_ui_cb;
         self.commands.append(&mut commands);