From 36bd2a65e35c0aa5070150e1db773b091a3000d6 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.a.alekhin@gmail.com>
Date: Thu, 23 Dec 2021 13:06:44 +0000
Subject: [PATCH] highgui(gtk): repair scroll events

---
 modules/highgui/src/window_gtk.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/highgui/src/window_gtk.cpp b/modules/highgui/src/window_gtk.cpp
index 5ce88fb7d9..a2c9505eb1 100644
--- a/modules/highgui/src/window_gtk.cpp
+++ b/modules/highgui/src/window_gtk.cpp
@@ -1824,6 +1824,10 @@ static gboolean icvOnMouse( GtkWidget *widget, GdkEvent *event, gpointer user_da
     }
     else if( event->type == GDK_SCROLL )
     {
+        GdkEventScroll* event_scroll = (GdkEventScroll*)event;
+        pt32f.x = cvFloor(event_scroll->x);
+        pt32f.y = cvFloor(event_scroll->y);
+
 #if defined(GTK_VERSION3_4)
         // NOTE: in current implementation doesn't possible to put into callback function delta_x and delta_y separately
         double delta = (event->scroll.delta_x + event->scroll.delta_y);
-- 
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