TouchHandler.cpp

#include "touchhandler/TouchHandler.h"
#ifdef PINETIME_IS_RECOVERY
  #include "displayapp/DummyLittleVgl.h"
#else
  #include "displayapp/LittleVgl.h"
#endif

using namespace Pinetime::Controllers;
using namespace Pinetime::Applications;

namespace {
  TouchEvents ConvertGesture(Pinetime::Drivers::Cst816S::Gestures gesture) {
    switch (gesture) {
      case Pinetime::Drivers::Cst816S::Gestures::SingleTap:
        return TouchEvents::Tap;
      case Pinetime::Drivers::Cst816S::Gestures::LongPress:
        return TouchEvents::LongTap;
      case Pinetime::Drivers::Cst816S::Gestures::DoubleTap:
        return TouchEvents::DoubleTap;
      case Pinetime::Drivers::Cst816S::Gestures::SlideRight:
        return TouchEvents::SwipeRight;
      case Pinetime::Drivers::Cst816S::Gestures::SlideLeft:
        return TouchEvents::SwipeLeft;
      case Pinetime::Drivers::Cst816S::Gestures::SlideDown:
        return TouchEvents::SwipeDown;
      case Pinetime::Drivers::Cst816S::Gestures::SlideUp:
        return TouchEvents::SwipeUp;
      case Pinetime::Drivers::Cst816S::Gestures::None:
      default:
        return TouchEvents::None;
    }
  }
}

TouchHandler::TouchHandler(Drivers::Cst816S& touchPanel, Components::LittleVgl& lvgl) : touchPanel {touchPanel}, lvgl {lvgl} {
}

void TouchHandler::CancelTap() {
  if (info.touching) {
    isCancelled = true;
    lvgl.SetNewTouchPoint(-1, -1, true);
  }
}

Pinetime::Applications::TouchEvents TouchHandler::GestureGet() {
  auto returnGesture = gesture;
  gesture = Pinetime::Applications::TouchEvents::None;
  return returnGesture;
}

bool TouchHandler::GetNewTouchInfo() {
  info = touchPanel.GetTouchInfo();
  if (!info.isValid)
    return false;

    // REPORT configurations (P8b variants) of the fused (usually) Cst716
    // generate multiple "none" gesture events with info.touching == true during the physical gesture.
    // The last event is a e.g. "slide" event with info.touching == true.
    // gestureReleased state does not have to be computed manually, instead it occurs when event != "none".

    // GESTURE configurations (P8a variants) of the fused (usually) Cst716 generate no events during the physical gesture.
    // The only event is a e.g. "slide" event with info.touching == true.
    // gestureReleased state does not have to be computed manually, instead it occurs everytime.

    // DYNAMIC configurations (PineTime) are configured in reporting mode during initialisation.
    // Usually based on the Cst816s, they generate multiple e.g. "slide" gesture events with info.touching == true during the physical
    // gesture. The last of these e.g. "slide" events has info.touching == false. gestureReleased state is computed manually by checking for
    // the transition to info.touching == false.

    // Unfortunately, there is no way to reliably obtain which configuration is used at runtime.
    // In all cases, the event is bubbled up once the gesture is released.

#if defined(DRIVER_TOUCH_REPORT)
  if (info.gesture != Pinetime::Drivers::Cst816S::Gestures::None) {
    gesture = ConvertGesture(info.gesture);
    info.touching = false;
  }
#elif defined(DRIVER_TOUCH_GESTURE)
  if (info.gesture != Pinetime::Drivers::Cst816S::Gestures::None) {
    gesture = ConvertGesture(info.gesture);
  }
#elif defined(DRIVER_TOUCH_DYNAMIC)
  if (info.gesture != Pinetime::Drivers::Cst816S::Gestures::None) {
    if (gestureReleased) {
      if (info.gesture == Pinetime::Drivers::Cst816S::Gestures::SlideDown ||
          info.gesture == Pinetime::Drivers::Cst816S::Gestures::SlideLeft ||
          info.gesture == Pinetime::Drivers::Cst816S::Gestures::SlideUp ||
          info.gesture == Pinetime::Drivers::Cst816S::Gestures::SlideRight ||
          info.gesture == Pinetime::Drivers::Cst816S::Gestures::LongPress) {
        if (info.touching) {
          gesture = ConvertGesture(info.gesture);
          gestureReleased = false;
        }
      } else {
        gesture = ConvertGesture(info.gesture);
      }
    }
  }

  if (!info.touching) {
    gestureReleased = true;
  }
#endif

  return true;
}

void TouchHandler::UpdateLvglTouchPoint() {
  if (info.touching) {
#if defined(DRIVER_TOUCH_GESTURE)
    // GESTURE config only generates a single event / state change
    // so the LVGL wrapper is used to generate a successive release state update
    lvgl.SetNewTap(info.x, info.y);
#else
    if (!isCancelled) {
      lvgl.SetNewTouchPoint(info.x, info.y, true);
    }
#endif
  } else {
    if (isCancelled) {
      lvgl.SetNewTouchPoint(-1, -1, false);
      isCancelled = false;
    } else {
      lvgl.SetNewTouchPoint(info.x, info.y, false);
    }
  }
}