long press cancels multi click

src/helpers/ui/MomentaryButton.cpp

@@ -1,5 +1,7 @@
 #include "MomentaryButton.h"
 
+#define MULTI_CLICK_WINDOW_MS  280
+
 MomentaryButton::MomentaryButton(int8_t pin, int long_press_millis, bool reverse, bool pulldownup) { 
   _pin = pin;
   _reverse = reverse;
@@ -11,7 +13,7 @@ MomentaryButton::MomentaryButton(int8_t pin, int long_press_millis, bool reverse
   _threshold = 0;
   _click_count = 0;
   _last_click_time = 0;
-  _multi_click_window = 260;
+  _multi_click_window = MULTI_CLICK_WINDOW_MS;
   _pending_click = false;
 }
 
@@ -26,7 +28,7 @@ MomentaryButton::MomentaryButton(int8_t pin, int long_press_millis, int analog_t
   _threshold = analog_threshold;
   _click_count = 0;
   _last_click_time = 0;
-  _multi_click_window = 260;
+  _multi_click_window = MULTI_CLICK_WINDOW_MS;
   _pending_click = false;
 }
 
@@ -43,7 +45,9 @@ bool  MomentaryButton::isPressed() const {
 
 void MomentaryButton::cancelClick() {
   cancel = 1;
+  down_at = 0;
   _click_count = 0;
+  _last_click_time = 0;
   _pending_click = false;
 }
 
@@ -94,11 +98,16 @@ int MomentaryButton::check(bool repeat_click) {
   }
 
   if (_long_millis > 0 && down_at > 0 && (unsigned long)(millis() - down_at) >= _long_millis) {
-    event = BUTTON_EVENT_LONG_PRESS;
-    down_at = 0;
-    _click_count = 0;
-    _last_click_time = 0;
-    _pending_click = false;
+    if (_pending_click) {
+      // long press during multi-click detection - cancel pending clicks
+      cancelClick();
+    } else {
+      event = BUTTON_EVENT_LONG_PRESS;
+      down_at = 0;
+      _click_count = 0;
+      _last_click_time = 0;
+      _pending_click = false;
+    }
   }
   if (down_at > 0 && repeat_click) {
     unsigned long diff = (unsigned long)(millis() - down_at);
@@ -108,6 +117,10 @@ int MomentaryButton::check(bool repeat_click) {
   }
 
   if (_pending_click && (millis() - _last_click_time) >= _multi_click_window) {
+    if (down_at > 0) {
+      // still pressed - wait for button release before processing clicks
+      return event;
+    }
     switch (_click_count) {
       case 1:
         event = BUTTON_EVENT_CLICK;