Encapsulate the drawing of the screen into Screens classes.

src/Components/DateTime/DateTimeController.h

@@ -19,6 +19,8 @@ namespace Pinetime {
         uint8_t Hours() const { return hour; }
         uint8_t Minutes() const { return minute; }
         uint8_t Seconds() const { return second; }
+
+        std::chrono::time_point<std::chrono::system_clock, std::chrono::milliseconds> CurrentDateTime() const { return currentDateTime; }
       private:
         uint16_t year = 0;
         Months month = Months::Unknown;

src/Components/Gfx/Gfx.cpp

@@ -4,6 +4,9 @@
 using namespace Pinetime::Components;
 
 Gfx::Gfx(Pinetime::Drivers::St7789 &lcd) : lcd{lcd} {
+}
+
+void Gfx::Init() {
   lcd.Init();
 }
 

src/Components/Gfx/Gfx.h

@@ -11,6 +11,7 @@ namespace Pinetime {
     class Gfx {
       public:
         explicit Gfx(Drivers::St7789& lcd);
+        void Init();
         void ClearScreen();
         void DrawString(uint8_t x, uint8_t y, uint16_t color, const char* text, const FONT_INFO *p_font, bool wrap);
         void DrawChar(const FONT_INFO *font, uint8_t c, uint8_t *x, uint8_t y, uint16_t color);