working demo driver view

include/App.h

@@ -2,6 +2,7 @@
 
 #include "AMI.h"
 #include "AppState.h"
+#include "DriverView.h"
 #include "MissionSelect.h"
 #include "defines.h"
 
@@ -44,6 +45,7 @@ private:
   std::unique_ptr<AppState> state;
   std::unique_ptr<MissionSelect> mission_select;
   std::unique_ptr<AMI> ami;
+  std::unique_ptr<DriverView> driver_view;
 
   bool running;
 

include/AppState.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "DemoDataSource.h"
+
 #include <fmt/ostream.h>
 
 #include <optional>
@@ -32,6 +34,7 @@ public:
 
   AppView get_view() const;
   Mission get_mission() const;
+  DemoDataSource get_data_source() const;
 
 private:
   void unmarshal_mission_select(uint8_t* data);
@@ -42,6 +45,7 @@ private:
 
   AppView view;
   Mission mission;
+  DemoDataSource data_source;
 
 #ifndef NDEBUG
   friend class KeyboardHandler;

include/BaseDataSource.h

@@ -0,0 +1,34 @@
+#pragma once
+
+class BaseDataSource {
+public:
+  double get_speed();                    // in km/h
+  double get_brake_balance();            // 0.0 - 1.0
+  double get_hv_voltage();               // in V
+  double get_hv_voltage_ratio();         // 0.0 - 1.0
+  double get_lv_voltage();               // in V
+  double get_battery_temperature();      // in °C
+  double get_throttle_ratio();           // 0.0 - 1.0
+  double get_brake_pressure_front_bar(); // in bar
+  double get_brake_pressure_rear_bar();  // in bar
+
+  bool brake_balance_change_is_recent(); // true if the last change was less
+                                         // than 1 second ago
+
+  virtual void poll() = 0;
+
+protected:
+  void set_brake_balance(double value);
+
+  double speed;
+  double brake_balance;
+  double hv_voltage;
+  double hv_voltage_ratio;
+  double lv_voltage;
+  double battery_temperature;
+  double throttle_ratio;
+  double brake_pressure_front_bar;
+  double brake_pressure_rear_bar;
+
+  int time_of_last_brake_balance_change;
+};

include/DemoDataSource.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "BaseDataSource.h"
+
+class DemoDataSource final : public BaseDataSource {
+public:
+  DemoDataSource();
+  ~DemoDataSource();
+
+  void poll() override;
+  void bump_brake_balance_up();
+  void bump_brake_balance_down();
+};

include/DriverView.h

@@ -0,0 +1,30 @@
+#pragma once
+#include "View.h"
+#include "defines.h"
+#include "util.h"
+#include "widgets.h"
+
+class DriverView final : public View {
+public:
+  DriverView(SDL_Renderer* renderer);
+  ~DriverView();
+
+  void draw(const AppState& state) override;
+
+private:
+  TTF_Font* font_large;
+  TTF_Font* font_detail;
+  TTF_Font* font_tiny;
+  TTF_Font* font_giant;
+  TTF_Font* font_medium;
+  std::unique_ptr<TextWidget> speed_widget;
+  std::unique_ptr<TextWidget> speed_hint_widget;
+
+  std::unique_ptr<TextWidget> brake_balance_widget;
+  std::unique_ptr<TextWidget> brake_balance_hint_widget;
+
+  std::unique_ptr<TextWidget> general_info_widget;
+
+  std::unique_ptr<TextWidget> focus_widget;
+  std::unique_ptr<TextWidget> focus_hint_widget;
+};

include/widgets.h

@@ -79,12 +79,13 @@ public:
   ~TextWidget();
 
   void update_text(const std::string& new_text);
+  void set_wrap_width(int width);
 
 protected:
   TTF_Font* font;
 
   std::string text;
-
+  int wrap_width = -1; // -1 means no wrapping (default behavior)
   SDL_Texture* generate_text(const std::string& text);
 };