[update] demo component output.

Author: vmarcella

lambda/src/core/events.rs

@@ -5,6 +5,7 @@ use std::time::Instant;
 pub enum ComponentEvent {
   Attached { name: String },
   Detached { name: String },
+  Update { delta: Instant },
 }
 
 /// Window events are generated in response to window events coming from
@@ -22,8 +23,8 @@ pub enum KernelEvent {
   Shutdown,
 }
 
-/// Generic Event Enum which encapsulates all possible events that will be emitted
-/// by the LambdaKernel
+/// Generic Event Enum which encapsulates all possible events that will be
+/// emitted by the LambdaKernel
 #[derive(Debug)]
 pub enum Events {
   Component {

lambda/src/kernels/mod.rs

@@ -66,7 +66,6 @@ impl LambdaKernelBuilder {
     self.render_api = configure(self.render_api);
     return self;
   }
-  /// Jjk
   /// Attach a component to the current runnable.
   pub fn with_component<T: Default + RenderableComponent<Events> + 'static>(
     self,
@@ -90,7 +89,7 @@ impl LambdaKernelBuilder {
       .with_name(name.as_str())
       .with_dimensions(width, height)
       .build(&mut event_loop);
-    let component_stack = Vec::new();
+    let component_stack = self.components;
     let render_api = self.render_api.build(&window);
 
     return LambdaKernel {

tools/lambda_rs_demo/src/main.rs

@@ -49,12 +49,8 @@ impl Component<Events> for DemoComponent {
 
   fn on_update(self: &mut DemoComponent, last_frame: &std::time::Duration) {
     println!(
-      "This layer was last updated: {} nanoseconds ago",
-      last_frame.as_nanos()
-    );
-
-    println!(
-      "This layer was last updated: {} milliseconds ago",
+      "This component was last updated: {} nanoseconds/{} milliseconds ago",
+      last_frame.as_nanos(),
       last_frame.as_millis()
     );
   }
@@ -104,12 +100,16 @@ impl RenderableComponent<Events> for DemoComponent {
           .render_pipeline
           .as_ref()
           .expect(
-            "No render pipeline set while trying to issue a render command",
+            "No render pipeline set while trying to issue a render command.",
           )
           .clone(),
       },
       RenderCommand::BeginRenderPass {
-        render_pass: self.render_pass.as_ref().unwrap().clone(),
+        render_pass: self
+          .render_pass
+          .as_ref()
+          .expect("Cannot begin the render pass when it doesn't exist.")
+          .clone(),
         viewport: viewport.clone(),
       },
       RenderCommand::Draw { vertices: 0..3 },