help comes to live, slowly

src/interactive/widgets/help.rs

@@ -1,5 +1,8 @@
 use tui::{
-    buffer::Buffer, layout::Rect, style::Style, widgets::Block, widgets::Borders, widgets::Widget,
+    buffer::Buffer,
+    layout::Rect,
+    style::{Modifier, Style},
+    widgets::{Block, Borders, Paragraph, Text, Widget},
 };
 
 #[derive(Copy, Clone)]
@@ -12,10 +15,31 @@ pub struct HelpPane {
 
 impl Widget for HelpPane {
     fn draw(&mut self, area: Rect, buf: &mut Buffer) {
-        Block::default()
+        fn title(name: &str) -> Text {
+            Text::Styled(
+                format!("{}\n\n", name).into(),
+                Style {
+                    modifier: Modifier::BOLD,
+                    ..Default::default()
+                },
+            )
+        };
+        fn hotkey(keys: &str, description: &str) -> Text<'static> {
+            Text::Styled(
+                format!("{} => {}\n", keys, description).into(),
+                Style {
+                    ..Default::default()
+                },
+            )
+        };
+
+        let mut block = Block::default()
             .title("Help")
             .border_style(self.border_style)
-            .borders(Borders::ALL)
-            .draw(area, buf);
+            .borders(Borders::ALL);
+        block.draw(area, buf);
+        let area = block.inner(area).inner(1);
+
+        Paragraph::new([title("Hotkeys"), hotkey("j", "move down")].iter()).draw(area, buf);
     }
 }

src/interactive/widgets/main.rs

@@ -56,18 +56,18 @@ impl<'a, 'b, 'c> Widget for MainWindow<'a, 'b, 'c> {
             }
             None => (entries_area, None),
         };
-        let grey = || Style {
+        let grey = Style {
             fg: Color::DarkGray,
             bg: Color::Reset,
             modifier: Modifier::empty(),
         };
-        let white = || Style {
+        let white = Style {
             fg: Color::White,
-            ..grey()
+            ..grey
         };
         let (entries_style, help_style) = match state.focussed {
-            FocussedPane::Main => (white(), grey()),
-            FocussedPane::Help => (grey(), white()),
+            FocussedPane::Main => (white, grey),
+            FocussedPane::Help => (grey, white),
         };
         Entries {
             tree: &tree,