From 02ea9636eeb7f8ae3b2fc5c55f7556b7b490e406 Mon Sep 17 00:00:00 2001
From: Feksaaargh <158505890+Feksaaargh@users.noreply.github.com>
Date: Sun, 4 Oct 2026 01:31:47 -0500
Subject: [PATCH] Add basic double click recognition

---
 sim/drivers/Cst816s.cpp | 12 +++++++++++-
 sim/drivers/Cst816s.h   |  4 +++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/sim/drivers/Cst816s.cpp b/sim/drivers/Cst816s.cpp
index eb800ff..c66c625 100644
--- a/sim/drivers/Cst816s.cpp
+++ b/sim/drivers/Cst816s.cpp
@@ -62,10 +62,12 @@ Cst816S::TouchInfos Cst816S::GetTouchInfo() {
         if (is_stationary && press_duration.count() > 1.0) {
           // longer than 1 second pressed, then it is long-press
           is_long_press = true;
+          tapped_recently = false;
           info.gesture = Gestures::LongPress;
         } else if (!is_stationary) {
           // moved mouse fast enough to not be a long-press
           is_swipe = true;
+          tapped_recently = false;
           double x_diff = static_cast<double>(info.x) - x_start;
           double y_diff = static_cast<double>(info.y) - y_start;
           if (fabs(x_diff) > fabs(y_diff)) {
@@ -95,7 +97,15 @@ Cst816S::TouchInfos Cst816S::GetTouchInfo() {
       if (norm < 20) {
         if (is_stationary && !is_long_press && !is_swipe) {
           // no swipe with less than 5 pixel mouse movement
-          info.gesture = Gestures::SingleTap;
+          std::chrono::duration<double> since_last_tap = std::chrono::steady_clock::now() - last_tapped;
+          if (tapped_recently && since_last_tap.count() < 0.4) {
+            info.gesture = Gestures::DoubleTap;
+            tapped_recently = false;
+          } else {
+            info.gesture = Gestures::SingleTap;
+            last_tapped = std::chrono::steady_clock::now();
+            tapped_recently = true;
+          }
         }
       }
     }
diff --git a/sim/drivers/Cst816s.h b/sim/drivers/Cst816s.h
index e6b9a03..a6d2eca 100644
--- a/sim/drivers/Cst816s.h
+++ b/sim/drivers/Cst816s.h
@@ -77,8 +77,10 @@ namespace Pinetime {
       const uint8_t vendorId = 0;
       const uint8_t fwVersion = 1;
 
-      // simulation members for swipe detection from mouse
+      // simulation members for swipe/double click detection from mouse
       std::chrono::time_point<std::chrono::steady_clock> pressed_since;
+      std::chrono::time_point<std::chrono::steady_clock> last_tapped;
+      bool tapped_recently = false;
       bool is_pressed = false;
       bool is_long_press = false;
       bool is_stationary = true;