dash-frontend: Top panel title

wgui/src/layout.rs

@@ -75,6 +75,10 @@ impl WidgetMap {
 		self.0.get(handle)?.get_as::<T>()
 	}
 
+	pub fn cast_as<T: 'static>(&self, handle: WidgetID) -> anyhow::Result<RefMut<'_, T>> {
+		self.get_as(handle).context("Widget cast failed")
+	}
+
 	pub fn get(&self, handle: WidgetID) -> Option<&Widget> {
 		self.0.get(handle)
 	}

wgui/src/widget/mod.rs

@@ -1,3 +1,4 @@
+use anyhow::Context;
 use glam::Vec2;
 use taffy::{NodeId, TaffyTree};
 
@@ -248,10 +249,18 @@ impl dyn WidgetObj {
 		any.downcast_ref::<T>()
 	}
 
+	pub fn cast<T: 'static>(&self) -> anyhow::Result<&T> {
+		self.get_as().context("cast failed")
+	}
+
 	pub fn get_as_mut<T: 'static>(&mut self) -> Option<&mut T> {
 		let any = self.as_any_mut();
 		any.downcast_mut::<T>()
 	}
+
+	pub fn cast_mut<T: 'static>(&mut self) -> anyhow::Result<&mut T> {
+		self.get_as_mut().context("cast failed")
+	}
 }
 
 struct InvokeData<'a, 'b, U1: 'static, U2: 'static> {