1 files changed, 24 insertions(+), 18 deletions(-)

M todo-app/main.go

@@ 173,24 173,30 @@ func (u *UI) Run() error {
 			// we return to end the event loop.
 			return ev.Err
 		case system.FrameEvent:
-			// If we get a frame event, it's time to display a new frame. First, we
-			// build a layout context using our operation list and info from the frame
-			// event.
-			gtx := layout.NewContext(&ops, ev)
-			// Install some global key event handlers for some dev hotkeys.
-			u.hotkeys(gtx)
-			// Then we lay out our UI to generate an operation list.
-			u.page.Layout(gtx)
-			// Then we give the operation list to Gio. This actually triggers rendering
-			// our window.
-			ev.Frame(gtx.Ops)
-			// Trigger a sweep of our stream controller. Doing this once per frame allows
-			// us to gracefully start and stop UI-driven streams of data from our backend
-			// without manually managing their lifecycle. If we sweep twice and a given stream
-			// was not used between them, we can conclude that it is not powering an active
-			// portion of the UI and shut it down for now.
-			// All that you really need to remember is that this must be called once per frame.
-			u.controller.Sweep()
+			trace.WithRegion(u.parentCtx, "frame", func() {
+				// If we get a frame event, it's time to display a new frame. First, we
+				// build a layout context using our operation list and info from the frame
+				// event.
+				gtx := layout.NewContext(&ops, ev)
+				trace.WithRegion(u.parentCtx, "layout", func() {
+					// Install some global key event handlers for some dev hotkeys.
+					u.hotkeys(gtx)
+					// Then we lay out our UI to generate an operation list.
+					u.page.Layout(gtx)
+				})
+				trace.WithRegion(u.parentCtx, "render", func() {
+					// Then we give the operation list to Gio. This actually triggers rendering
+					// our window.
+					ev.Frame(gtx.Ops)
+				})
+				// Trigger a sweep of our stream controller. Doing this once per frame allows
+				// us to gracefully start and stop UI-driven streams of data from our backend
+				// without manually managing their lifecycle. If we sweep twice and a given stream
+				// was not used between them, we can conclude that it is not powering an active
+				// portion of the UI and shut it down for now.
+				// All that you really need to remember is that this must be called once per frame.
+				u.controller.Sweep()
+			})
 		}
 	}
 	return nil