From 0910372c57f24036c568f2c35f9c88dc6d1f2d71 Mon Sep 17 00:00:00 2001
From: Tilman Sauerbeck <tilman@code-monkey.de>
Date: Mon, 23 Mar 2020 12:52:21 +0100
Subject: [PATCH] application: Use the previous/next buttons to cycle the
 current view.

---
 src/application/main.rs | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/application/main.rs b/src/application/main.rs
index 2b2f8f6..6e8d37d 100644
--- a/src/application/main.rs
+++ b/src/application/main.rs
@@ -88,6 +88,20 @@ impl Timer {
     }
 }
 
+fn next_view(view: View) -> View {
+    match view {
+        View::Time => View::Distance,
+        View::Distance => View::Time,
+    }
+}
+
+fn previous_view(view: View) -> View {
+    match view {
+        View::Time => View::Distance,
+        View::Distance => View::Time,
+    }
+}
+
 fn reset_requested() -> bool {
     let pta1 = gpio::get(gpio::GPIOA) & (1 << 1);
     let pte25 = gpio::get(gpio::GPIOE) & (1 << 25);
@@ -220,6 +234,8 @@ pub unsafe extern "C" fn _start() -> ! {
     logger.init();
 
     let mut pta12 = button::Button::new(gpio::GPIOA, 1 << 12);
+    let mut pte24 = button::Button::new(gpio::GPIOE, 1 << 24);
+    let mut pta01 = button::Button::new(gpio::GPIOA, 1 << 1);
     let mut is_recording = false;
 
     let mut gps = gps::Gps::new();
@@ -328,6 +344,23 @@ pub unsafe extern "C" fn _start() -> ! {
             model.reset();
         }
 
+        let new_view = if pte24.has_been_held_for_ms(250) {
+            previous_view(view)
+        } else if pta01.has_been_held_for_ms(250) {
+            next_view(view)
+        } else {
+            view
+        };
+
+        if view != new_view {
+            view = new_view;
+
+            match view {
+                View::Time => time_view.invalidate(),
+                View::Distance => distance_view.invalidate(),
+            }
+        }
+
         if reset_requested() {
             nvic::system_reset();
         }
-- 
2.30.2