Add the possibility to the screen to handle a touch gesture.

A default action is taken if the current screen doesn't handle it.

src/CMakeLists.txt

@@ -242,6 +242,7 @@ set(INCLUDE_FILES
   Logging/NrfLogger.h
   BlinkApp/BlinkApp.h
   DisplayApp/DisplayApp.h
+  DisplayApp/TouchEvents.h
   DisplayApp/Screens/Screen.h
   DisplayApp/Screens/Clock.h
   DisplayApp/Screens/Message.h
@@ -288,4 +289,4 @@ link_directories(
   ../
 )
 
-nRF5x_addExecutable(pinetime-app "${SOURCE_FILES}")
+nRF5x_addExecutable(pinetime-app "${SOURCE_FILES}" ${INCLUDE_FILES})

src/DisplayApp/DisplayApp.cpp

@@ -110,17 +110,19 @@ void DisplayApp::Refresh() {
       case Messages::TouchEvent: {
         if (state != States::Running) break;
         auto gesture = OnTouchEvent();
-        switch (gesture) {
-          case DisplayApp::TouchEvents::SwipeUp:
-            currentScreen->OnButtonPushed();
-            lvgl.SetFullRefresh(Components::LittleVgl::FullRefreshDirections::Up);
-            break;
-          case DisplayApp::TouchEvents::SwipeDown:
-            currentScreen->OnButtonPushed();
-            lvgl.SetFullRefresh(Components::LittleVgl::FullRefreshDirections::Down);
-            break;
-          default:
-            break;
+        if(!currentScreen->OnTouchEvent(gesture)) {
+          switch (gesture) {
+            case TouchEvents::SwipeUp:
+              currentScreen->OnButtonPushed();
+              lvgl.SetFullRefresh(Components::LittleVgl::FullRefreshDirections::Up);
+              break;
+            case TouchEvents::SwipeDown:
+              currentScreen->OnButtonPushed();
+              lvgl.SetFullRefresh(Components::LittleVgl::FullRefreshDirections::Down);
+              break;
+            default:
+              break;
+          }
         }
       }
         break;
@@ -189,32 +191,31 @@ void DisplayApp::PushMessage(DisplayApp::Messages msg) {
   }
 }
 
-DisplayApp::TouchEvents DisplayApp::OnTouchEvent() {
+TouchEvents DisplayApp::OnTouchEvent() {
   auto info = touchPanel.GetTouchInfo();
   if(info.isTouch) {
     switch(info.gesture) {
       case Pinetime::Drivers::Cst816S::Gestures::SingleTap:
-        // TODO set x,y to LittleVgl
         lvgl.SetNewTapEvent(info.x, info.y);
-        return DisplayApp::TouchEvents::Tap;
+        return TouchEvents::Tap;
       case Pinetime::Drivers::Cst816S::Gestures::LongPress:
-        return DisplayApp::TouchEvents::LongTap;
+        return TouchEvents::LongTap;
       case Pinetime::Drivers::Cst816S::Gestures::DoubleTap:
-        return DisplayApp::TouchEvents::DoubleTap;
+        return TouchEvents::DoubleTap;
       case Pinetime::Drivers::Cst816S::Gestures::SlideRight:
-        return DisplayApp::TouchEvents::SwipeRight;
+        return TouchEvents::SwipeRight;
       case Pinetime::Drivers::Cst816S::Gestures::SlideLeft:
-        return DisplayApp::TouchEvents::SwipeLeft;
+        return TouchEvents::SwipeLeft;
       case Pinetime::Drivers::Cst816S::Gestures::SlideDown:
-        return DisplayApp::TouchEvents::SwipeDown;
+        return TouchEvents::SwipeDown;
       case Pinetime::Drivers::Cst816S::Gestures::SlideUp:
-        return DisplayApp::TouchEvents::SwipeUp;
+        return TouchEvents::SwipeUp;
       case Pinetime::Drivers::Cst816S::Gestures::None:
       default:
-        return DisplayApp::TouchEvents::None;
+        return TouchEvents::None;
     }
   }
-  return DisplayApp::TouchEvents::None;
+  return TouchEvents::None;
 }
 
 void DisplayApp::StartApp(DisplayApp::Apps app) {

src/DisplayApp/DisplayApp.h

@@ -15,6 +15,7 @@
 #include "LittleVgl.h"
 #include <date/date.h>
 #include <DisplayApp/Screens/Clock.h>
+#include "TouchEvents.h"
 
 
 namespace Pinetime {
@@ -26,8 +27,7 @@ namespace Pinetime {
       public:
         enum class States {Idle, Running};
         enum class Messages : uint8_t {GoToSleep, GoToRunning, UpdateDateTime, UpdateBleConnection, UpdateBatteryLevel, TouchEvent, SwitchScreen,ButtonPushed} ;
-        enum class TouchEvents { None, Tap, SwipeLeft, SwipeRight, SwipeUp, SwipeDown, LongTap, DoubleTap
-        };
+
         DisplayApp(Pinetime::Drivers::St7789& lcd,
                    Pinetime::Components::LittleVgl& lvgl,
                    Pinetime::Drivers::Cst816S&,

src/DisplayApp/Screens/Brightness.cpp

@@ -70,3 +70,23 @@ uint8_t Brightness::LevelToInt(Pinetime::Controllers::BrightnessController::Leve
     default : return 0;
   }
 }
+
+bool Brightness::OnTouchEvent(Pinetime::Applications::TouchEvents event) {
+  switch(event) {
+    case TouchEvents::SwipeLeft:
+      brightness.Lower();
+      SetValue();
+      return true;
+    case TouchEvents::SwipeRight:
+      brightness.Higher();
+      SetValue();
+      return true;
+    default:
+      return false;
+  }
+}
+
+void Brightness::SetValue() {
+  lv_slider_set_value(slider, LevelToInt(brightness.Level()), LV_ANIM_OFF);
+  lv_label_set_text(slider_label, LevelToString(brightness.Level()));
+}

src/DisplayApp/Screens/Brightness.h

@@ -13,6 +13,7 @@ namespace Pinetime {
           ~Brightness() override;
           bool Refresh() override;
           bool OnButtonPushed() override;
+          bool OnTouchEvent(TouchEvents event) override;
 
           void OnValueChanged();
         private:
@@ -25,6 +26,7 @@ namespace Pinetime {
           const char* LevelToString(Controllers::BrightnessController::Levels level);
           uint8_t LevelToInt(Controllers::BrightnessController::Levels level);
           void SetValue(uint8_t value);
+          void SetValue();
       };
     }
   }

src/DisplayApp/Screens/Screen.h

@@ -1,4 +1,5 @@
 #pragma once
+#include "../TouchEvents.h"
 
 namespace Pinetime {
   namespace Applications {
@@ -15,6 +16,9 @@ namespace Pinetime {
           // Return false if the button hasn't been handled by the app, true if it has been handled
           virtual bool OnButtonPushed() { return false; }
 
+          // Return false if the event hasn't been handled by the app, true if it has been handled
+          virtual bool OnTouchEvent(TouchEvents event) { return false; }
+
         protected:
           DisplayApp* app;
       };

src/DisplayApp/TouchEvents.h

@@ -0,0 +1,8 @@
+#pragma once
+
+namespace Pinetime {
+  namespace Applications {
+
+    enum class TouchEvents { None, Tap, SwipeLeft, SwipeRight, SwipeUp, SwipeDown, LongTap, DoubleTap};
+  }
+}