Improved display printing, added extra debug.

src/gtfs/mod.rs

@@ -4,6 +4,7 @@ mod utils;
 pub mod structs;
 use chrono::{DateTime, Local, Timelike};
 use log::{debug};
+use sdl3::sys::pixels::SDL_ArrayOrder;
 use std::{
     collections::{HashMap, HashSet}, fs::File, io::Error
 };
@@ -66,7 +67,6 @@ impl Gtfs {
         for (_id, stop_time) in self.stop_times.iter() {
             if trips.contains_key(&stop_time.trip_id) {
                 let stop_timestamp = stop_time.departure_time.or(stop_time.arrival_time)?;
-                debug!("Stop timestamp {} current timestamp {}", stop_timestamp, current_timestamp);
                 let trip= &self.trips.get(&stop_time.trip_id).unwrap();
                 if current_timestamp < stop_timestamp.into() {
                     let arrival: Arrival = Arrival {
@@ -76,6 +76,7 @@ impl Gtfs {
                         trip: &trip,
                         departure_time: stop_timestamp.into()
                     };
+                    debug!("Arrival to {:#?} for trip ID {:#?}.", arrival.trip.trip_headsign.as_ref().unwrap(), arrival.trip.id);
                     arrivals.push(arrival);                        
                 }
             }

src/main.rs

@@ -83,7 +83,7 @@ fn main() {
     // Create preferences structures from config
     let gtfs_prefs = gtfs::structs::Preferences  {
         route_numbers: HashSet::from([String::from("15A"), String::from("F1"), String::from("F2"), String::from("F3")]),
-        stop_codes: HashSet::from([String::from("1117")])
+        stop_codes: HashSet::from([String::from("1114")])
     };
 
     let screen_prefs = renderer::structs::Prefs {

src/renderer/mod.rs

@@ -1,7 +1,7 @@
 pub mod structs;
-use std::cmp::min;
-
-use sdl3::{Sdl, pixels::Color, rect::Rect, ttf::FontStyle};
+use std::{cmp::min};
+use log::{error, warn};
+use sdl3::{Sdl, pixels::Color, rect::Rect};
 use structs::{Prefs, DisplayData};
 
 use crate::renderer::structs::Screen;
@@ -11,6 +11,7 @@ const COLOR_LCD_AMBER   : Color = Color::RGB(0xf4, 0xcb, 0x60);
 const COLOR_LCD_GREEN   : Color = Color::RGB(0xb3, 0xff, 0x00);
 const COLOR_LCD_RED     : Color = Color::RGB(0xff, 0x3a, 0x4a);
 const COLOR_BACKGROUND  : Color = Color::RGB(0x0,  0x0,  0x0 );
+const COLOR_TEXT_BG     : Color = Color::RGBA(0x0, 0x0, 0x0, 0x0);
 const TEXT_SIZE: f32 = 160.0;  // Size of the font in pixels
 
 // Offsets of each part within a line
@@ -45,8 +46,16 @@ impl Screen<'_> {
     pub fn update_information(&mut self, display_data: &DisplayData) {
         self.do_clear();
 
-        // TODO: Add header
+        // Print status first
+        if display_data.status.is_some() {
+            // If the update has some information text, show it
+            self.do_print_at(5, display_data.status.as_ref().unwrap(), 0);
+        } else {
+            // Display date and time otherwise
+            self.do_print_at(5, &format!("TODO: DATE/TIME GOES HERE").to_string(), 0);
+        }
 
+        // Then data lines from the bottom up
         let num_arrivals: i32 = min(LINE_COUNT, display_data.lines.len() as i32);
         for index in 0..num_arrivals {
             let line: u32 = ((num_arrivals - 1) - index) as u32;
@@ -62,10 +71,6 @@ impl Screen<'_> {
             self.color = due_color;
             self.do_print_at(line, &due_text, XOFFSEET_TIME_LEFT);
         };
-
-        if display_data.status.is_some() {
-            self.do_print_at(5, display_data.status.as_ref().unwrap(), 0);
-        }
         self.do_update();
     }
 
@@ -76,14 +81,31 @@ impl Screen<'_> {
     }
 
 
-    fn do_print_at(&mut self, line: u32, text: &str, left: u32) -> u32 {
-        let rendered_text = self.font.render(text).lcd(self.color, COLOR_BACKGROUND).unwrap();
+    fn do_print_at(&mut self, line: u32, text: &str, left: u32) {
+        if  text.len() == 0 {
+            warn!("do_print_at called with a 0-length string");
+            return;  
+        }
+
+        let render_result = self.font.render(text).lcd(self.color, COLOR_BACKGROUND);
+
+        if render_result.is_err() {
+            error!("Error rendering text \"{}\": {:#?}", text, render_result.err());
+            return;
+        }
+
+        let rendered_text = render_result.unwrap();
         let texture_creator = self.canvas.texture_creator();
-        let texture = rendered_text.as_texture(&texture_creator).unwrap();
-        let _= self.canvas.copy(&texture, 
+        let texture = rendered_text.as_texture(&texture_creator);
+
+        if texture.is_err() {
+            error!("Error creating texture from rendered text: {:#?}", texture.err());
+            return;
+        }
+
+        let _= self.canvas.copy(&texture.unwrap(), 
             Rect::new(0, 0, rendered_text.width(), rendered_text.height()), 
             Rect::new(left.try_into().unwrap(), (line * (rendered_text.height() - INTER_LINE_OVERLAP)).try_into().unwrap(), rendered_text.width(), rendered_text.height()));
-        return left + rendered_text.width();
     }