updates

user-apps/calculator/src/main.rs

@@ -39,7 +39,7 @@ pub extern "Rust" fn _start() {
 
 pub fn main() {
     print!("Starting Calculator app");
-    let mut display = Display;
+    let mut display = Display::take().unwrap();
 
     let mut input = vec!['e', 'x', 'p', 'r', ':', ' '];
     let input_min = input.len();

user-apps/gallery/src/main.rs

@@ -32,7 +32,7 @@ pub extern "Rust" fn _start() {
 pub fn main() {
     print!("Starting Gallery app");
     let mut bmp_buf = vec![0_u8; 100_000];
-    let mut display = Display;
+    let mut display = Display::take().unwrap();
 
     let grid_cols = 3;
     let grid_rows = 3;

user-apps/gif/src/main.rs

@@ -12,9 +12,13 @@ use abi::{
 use alloc::{format, vec, vec::Vec};
 use core::panic::PanicInfo;
 use embedded_graphics::{
-    image::ImageDrawable, pixelcolor::Rgb565, prelude::Point, transform::Transform,
+    image::ImageDrawable,
+    mono_font::{MonoTextStyle, ascii::FONT_6X10},
+    pixelcolor::Rgb565,
+    prelude::{Point, RgbColor},
+    transform::Transform,
 };
-use selection_ui::SelectionUi;
+use selection_ui::{SelectionUi, SelectionUiError, draw_text_center};
 use tinygif::Gif;
 
 #[panic_handler]
@@ -30,7 +34,7 @@ pub extern "Rust" fn _start() {
 
 pub fn main() {
     print!("Starting Gif app");
-    let mut display = Display;
+    let mut display = Display::take().unwrap();
 
     let mut entries = Entries::new();
     list_dir("/gifs", &mut entries);
@@ -39,13 +43,26 @@ pub fn main() {
     files.retain(|e| e.extension().unwrap_or("") == "gif");
     let gifs = &files.iter().map(|e| e.full_name()).collect::<Vec<&str>>();
 
-    let mut selection_ui = SelectionUi::new(&gifs, "No Gif files found in /gifs");
-    let selection = selection_ui
-        .run_selection_ui(&mut display)
-        .expect("failed to draw")
-        .expect("Failed to get user selection");
+    let mut selection_ui = SelectionUi::new(&gifs);
+    let selection = match selection_ui.run_selection_ui(&mut display) {
+        Ok(maybe_sel) => maybe_sel,
+        Err(e) => match e {
+            SelectionUiError::SelectionListEmpty => {
+                draw_text_center(
+                    &mut display,
+                    "No Gifs were found in /gifs",
+                    MonoTextStyle::new(&FONT_6X10, Rgb565::RED),
+                )
+                .expect("Display Error");
+                None
+            }
+            SelectionUiError::DisplayError(_) => panic!("Display Error"),
+        },
+    };
 
-    let file_name = format!("/gifs/{}", gifs[selection]);
+    assert!(selection.is_some());
+
+    let file_name = format!("/gifs/{}", gifs[selection.unwrap()]);
     let size = file_len(&file_name);
     let mut buf = vec![0_u8; size];
     let read = read_file(&file_name, 0, &mut buf);

user-apps/snake/src/main.rs

@@ -28,7 +28,7 @@ const CELL_SIZE: usize = 8;
 
 pub fn main() {
     print!("Starting Snake app");
-    let mut display = Display;
+    let mut display = Display::take().unwrap();
 
     let mut game = SnakeGame::<100, Rgb565, Rng>::new(
         SCREEN_WIDTH as u16,