Handle touch gestures

Author: pipe01

src/displayapp/screens/Pawn.cpp

@@ -487,6 +487,12 @@ Pawn::Pawn(AppControllers& controllers) : controllers(controllers) {
     taskRefresh = lv_task_create(RefreshTaskCallback, LV_DISP_DEF_REFR_PERIOD, LV_TASK_PRIO_MID, this);
     Refresh();
   }
+  if (amx_FindPublic(&amx, "@touch", &touch_index) != AMX_ERR_NONE) {
+    touch_index = -1;
+  }
+  if (amx_FindPublic(&amx, "@gesture", &gesture_index) != AMX_ERR_NONE) {
+    gesture_index = -1;
+  }
 }
 
 void Pawn::CleanUI() {
@@ -574,3 +580,38 @@ void Pawn::QueueError(unsigned int amx_err) {
     },
     this);
 }
+
+bool Pawn::OnTouchEvent(TouchEvents event) {
+  if (gesture_index < 0)
+    return false;
+
+  cell ret;
+
+  amx_Push(&amx, (cell)event);
+
+  int result = amx_Exec(&amx, &ret, gesture_index);
+  if (result != AMX_ERR_NONE) {
+    ShowError(result);
+    return true;
+  }
+
+  return ret != 0;
+}
+
+bool Pawn::OnTouchEvent(uint16_t x, uint16_t y) {
+  if (touch_index < 0)
+    return false;
+
+  cell ret;
+
+  amx_Push(&amx, y);
+  amx_Push(&amx, x);
+
+  int result = amx_Exec(&amx, &ret, touch_index);
+  if (result != AMX_ERR_NONE) {
+    ShowError(result);
+    return true;
+  }
+
+  return ret != 0;
+}

src/displayapp/screens/Pawn.h

@@ -25,14 +25,17 @@ namespace Pinetime {
         void ShowError(unsigned int amx_err);
         void ShowError(const char* msg);
 
+        bool OnTouchEvent(TouchEvents event) override;
+        bool OnTouchEvent(uint16_t x, uint16_t y) override;
+
         Utility::DirtyValue<std::chrono::time_point<std::chrono::system_clock, std::chrono::minutes>> currentDateTime {};
         AppControllers& controllers;
 
         Widgets::StatusIcons* statusIcons = nullptr;
 
       private:
         AMX amx;
-        int refresh_index;
+        int refresh_index, touch_index, gesture_index;
         lv_task_t* taskRefresh = 0;
         unsigned int queued_error = 0;