src/tui/app.rs

@@ -121,8 +121,23 @@ impl<'a> App<'a> {
         .render(area, buf);
     }
 
+    fn clear_focus(&mut self) {
+        info!(target:Self::id(), "Clearing all widget focus");
+        self.explorer.component_state.set_focus(Focus::Inactive);
+        self.explorer.component_state.set_focus(Focus::Inactive);
+        self.logger.component_state.set_focus(Focus::Inactive);
+        self.menu_bar.component_state.set_focus(Focus::Inactive);
+        match self.editor_tabs.current_editor_mut() {
+            None => {
+                error!(target:Self::id(), "Failed to get current Editor while clearing focus")
+            }
+            Some(editor) => editor.component_state.set_focus(Focus::Inactive),
+        }
+    }
+
     fn change_focus(&mut self, focus: AppComponent) {
         info!(target:Self::id(), "Changing widget focus to {:?}", focus);
+        self.clear_focus();
         match focus {
             AppEditor => match self.editor_tabs.current_editor_mut() {
                 None => {

src/tui/component.rs

@@ -3,6 +3,7 @@
 use anyhow::Result;
 use log::trace;
 use ratatui::crossterm::event::{Event, KeyEvent, MouseEvent};
+use ratatui::style::Color;
 
 pub enum Action {
     /// Exit the application.
@@ -81,10 +82,20 @@ pub enum Focus {
     Inactive,
 }
 
+impl Focus {
+    pub(crate) fn get_active_color(&self) -> Color {
+        match self {
+            Focus::Active => Color::LightYellow,
+            Focus::Inactive => Color::White,
+        }
+    }
+}
+
 pub trait FocusState {
     fn with_focus(self, focus: Focus) -> Self;
     fn set_focus(&mut self, focus: Focus);
     fn toggle_focus(&mut self);
+    fn get_active_color(&self) -> Color;
 }
 
 impl FocusState for ComponentState {
@@ -105,4 +116,8 @@ impl FocusState for ComponentState {
             Focus::Inactive => self.set_focus(Focus::Active),
         }
     }
+
+    fn get_active_color(&self) -> Color {
+        self.focus.get_active_color()
+    }
 }

src/tui/editor.rs

@@ -1,4 +1,4 @@
-use crate::tui::component::{Action, Component, ComponentState, Focus};
+use crate::tui::component::{Action, Component, ComponentState, Focus, FocusState};
 use anyhow::{Context, Result, bail};
 use edtui::{
     EditorEventHandler, EditorState, EditorTheme, EditorView, LineNumbers, Lines, SyntaxHighlighter,
@@ -86,7 +86,8 @@ impl Widget for &mut Editor {
                         .title_style(Style::default().fg(Color::Yellow))
                         .title_alignment(Alignment::Right)
                         .borders(Borders::ALL)
-                        .padding(Padding::new(0, 0, 0, 1)),
+                        .padding(Padding::new(0, 0, 0, 1))
+                        .style(Style::default().fg(self.component_state.get_active_color())),
                 ),
             )
             .syntax_highlighter(SyntaxHighlighter::new("dracula", lang).ok())

src/tui/editor_tab.rs

@@ -84,6 +84,7 @@ impl EditorTab {
                 .map(|f| f.to_string_lossy().to_string())
                 .unwrap_or("Unknown".to_string())
         });
+        // Don't set border color based on ComponentState::focus, the Editor renders the border.
         Tabs::new(tab_titles)
             .select(self.current_editor)
             .divider("|")

src/tui/explorer.rs

@@ -1,4 +1,4 @@
-use crate::tui::component::{Action, Component, ComponentState, Focus};
+use crate::tui::component::{Action, Component, ComponentState, Focus, FocusState};
 use anyhow::{Context, Result, bail};
 use log::trace;
 use ratatui::buffer::Buffer;
@@ -101,20 +101,20 @@ impl<'a> Widget for &mut Explorer<'a> {
         if let Ok(tree) = Tree::new(&self.tree_items.children()) {
             let file_name = self.root_path.file_name().unwrap_or("Unknown".as_ref());
             StatefulWidget::render(
-                tree.style(Style::default())
-                    .block(
-                        Block::default()
-                            .borders(Borders::ALL)
-                            .title(file_name.to_string_lossy())
-                            .title_style(Style::default().fg(Color::Green))
-                            .title_alignment(Alignment::Center),
-                    )
-                    .highlight_style(
-                        Style::new()
-                            .fg(Color::Black)
-                            .bg(Color::Rgb(57, 59, 64))
-                            .add_modifier(Modifier::BOLD),
-                    ),
+                tree.block(
+                    Block::default()
+                        .borders(Borders::ALL)
+                        .title(file_name.to_string_lossy())
+                        .border_style(Style::default().fg(self.component_state.get_active_color()))
+                        .title_style(Style::default().fg(Color::Green))
+                        .title_alignment(Alignment::Center),
+                )
+                .highlight_style(
+                    Style::new()
+                        .fg(Color::Black)
+                        .bg(Color::Rgb(57, 59, 64))
+                        .add_modifier(Modifier::BOLD),
+                ),
                 area,
                 buf,
                 &mut self.tree_state,

src/tui/logger.rs

@@ -1,4 +1,4 @@
-use crate::tui::component::{Action, Component, ComponentState, Focus};
+use crate::tui::component::{Action, Component, ComponentState, Focus, FocusState};
 use log::{LevelFilter, trace};
 use ratatui::buffer::Buffer;
 use ratatui::crossterm::event::{Event, KeyCode, KeyEvent};
@@ -42,6 +42,7 @@ impl Widget for &Logger {
         Self: Sized,
     {
         TuiLoggerSmartWidget::default()
+            .border_style(Style::default().fg(self.component_state.get_active_color()))
             .style_error(Style::default().fg(Color::Red))
             .style_debug(Style::default().fg(Color::Green))
             .style_warn(Style::default().fg(Color::Yellow))

src/tui/menu_bar.rs

@@ -1,4 +1,4 @@
-use crate::tui::component::{Action, Component, ComponentState};
+use crate::tui::component::{Action, Component, ComponentState, FocusState};
 use crate::tui::menu_bar::MenuBarItemOption::{
     About, Exit, Reload, Save, ShowHideExplorer, ShowHideLogger,
 };
@@ -108,7 +108,11 @@ impl MenuBar {
         };
         Tabs::new(titles)
             .style(tabs_style)
-            .block(Block::default().borders(Borders::ALL))
+            .block(
+                Block::default()
+                    .borders(Borders::ALL)
+                    .border_style(Style::default().fg(self.component_state.get_active_color())),
+            )
             .highlight_style(highlight_style)
             .select(self.selected as usize)
             .render(area, buf);