lib: Improve content function types in imUI

src/ui/im.rs

@@ -25,6 +25,8 @@ use crate::ui::{Column, ToRow};
 
 use crate::ui::im::widget::{HeaderedTable, Widget};
 
+use self::widget::AddContentFn;
+
 const RENDERING_TICK_RATE: Duration = Duration::from_millis(250);
 
 /// The main UI trait for the ability to render an application.
@@ -406,10 +408,10 @@ where
         self.layout_dyn(layout, Box::new(add_contents))
     }
 
-    pub fn layout_dyn<'a, R>(
+    pub fn layout_dyn<R>(
         &mut self,
         layout: impl Into<Layout>,
-        add_contents: Box<dyn FnOnce(&mut Self) -> R + 'a>,
+        add_contents: Box<AddContentFn<M, R>>,
     ) -> InnerResponse<R> {
         let (area, _) = self.next_area().unwrap_or_default();
         let mut child_ui = self.child_ui(area, layout);

src/ui/im/widget.rs

@@ -15,6 +15,8 @@ use crate::ui::{Column, ToRow};
 
 use super::{Borders, Context, InnerResponse, Response, Ui};
 
+pub type AddContentFn<'a, M, R> = dyn FnOnce(&mut Ui<M>) -> R + 'a;
+
 pub trait Widget {
     fn ui<M>(self, ui: &mut Ui<M>, frame: &mut Frame) -> Response
     where
@@ -37,10 +39,10 @@ impl Window {
         self.show_dyn(ctx, Box::new(add_contents))
     }
 
-    fn show_dyn<'c, M, R>(
+    fn show_dyn<M, R>(
         self,
         ctx: &Context<M>,
-        add_contents: Box<dyn FnOnce(&mut Ui<M>) -> R + 'c>,
+        add_contents: Box<AddContentFn<M, R>>,
     ) -> Option<InnerResponse<Option<R>>>
     where
         M: Clone,
@@ -111,10 +113,10 @@ impl<'a> Group<'a> {
         self.show_dyn(ui, Box::new(add_contents))
     }
 
-    pub fn show_dyn<'c, M, R>(
+    pub fn show_dyn<M, R>(
         self,
         ui: &mut Ui<M>,
-        add_contents: Box<dyn FnOnce(&mut Ui<M>) -> R + 'c>,
+        add_contents: Box<AddContentFn<M, R>>,
     ) -> InnerResponse<R>
     where
         M: Clone,