From 52b3c3efcc0ef4c93ce24e068b68e797e8863aee Mon Sep 17 00:00:00 2001
From: Christoph Honal <christoph.honal@web.de>
Date: Tue, 10 May 2022 22:58:35 +0200
Subject: [PATCH] LVGL: Add SetNewTap to generate tap events

This function sends a tap down and tap up event to LVGL,
despite being called only once.
---
 src/displayapp/DummyLittleVgl.h |  2 ++
 src/displayapp/LittleVgl.cpp    | 14 ++++++++++++++
 src/displayapp/LittleVgl.h      |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/src/displayapp/DummyLittleVgl.h b/src/displayapp/DummyLittleVgl.h
index 05355a97..cf105cc5 100644
--- a/src/displayapp/DummyLittleVgl.h
+++ b/src/displayapp/DummyLittleVgl.h
@@ -33,6 +33,8 @@ namespace Pinetime {
       }
       void SetNewTouchPoint(uint16_t x, uint16_t y, bool contact) {
       }
+      void SetNewTap(uint16_t x, uint16_t y) {
+      }
     };
   }
 }
diff --git a/src/displayapp/LittleVgl.cpp b/src/displayapp/LittleVgl.cpp
index 64c99261..e282d933 100644
--- a/src/displayapp/LittleVgl.cpp
+++ b/src/displayapp/LittleVgl.cpp
@@ -180,6 +180,14 @@ void LittleVgl::SetNewTouchPoint(uint16_t x, uint16_t y, bool contact) {
   tap_x = x;
   tap_y = y;
   tapped = contact;
+  simulate_tap_release = false;
+}
+
+void LittleVgl::SetNewTap(uint16_t x, uint16_t y) {
+  tap_x = x;
+  tap_y = y;
+  tapped = true;
+  simulate_tap_release = true;
 }
 
 bool LittleVgl::GetTouchPadInfo(lv_indev_data_t* ptr) {
@@ -187,6 +195,12 @@ bool LittleVgl::GetTouchPadInfo(lv_indev_data_t* ptr) {
   ptr->point.y = tap_y;
   if (tapped) {
     ptr->state = LV_INDEV_STATE_PR;
+    if (simulate_tap_release) {
+      // If a tap consists of only a single event, enqueue a synthetic release state update
+      tapped = false;
+      simulate_tap_release = false;
+      return true;
+    }
   } else {
     ptr->state = LV_INDEV_STATE_REL;
   }
diff --git a/src/displayapp/LittleVgl.h b/src/displayapp/LittleVgl.h
index 45826165..e35da7fb 100644
--- a/src/displayapp/LittleVgl.h
+++ b/src/displayapp/LittleVgl.h
@@ -25,6 +25,7 @@ namespace Pinetime {
       bool GetTouchPadInfo(lv_indev_data_t* ptr);
       void SetFullRefresh(FullRefreshDirections direction);
       void SetNewTouchPoint(uint16_t x, uint16_t y, bool contact);
+      void SetNewTap(uint16_t x, uint16_t y);
 
       bool GetFullRefresh() {
         bool returnValue = fullRefresh;
@@ -62,6 +63,7 @@ namespace Pinetime {
       uint16_t tap_x = 0;
       uint16_t tap_y = 0;
       bool tapped = false;
+      bool simulate_tap_release = false;
     };
   }
 }