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Merge pull request #21331 from alalek:issue_21289
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@ -1824,6 +1824,10 @@ static gboolean icvOnMouse( GtkWidget *widget, GdkEvent *event, gpointer user_da
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}
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else if( event->type == GDK_SCROLL )
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{
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GdkEventScroll* event_scroll = (GdkEventScroll*)event;
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pt32f.x = cvFloor(event_scroll->x);
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pt32f.y = cvFloor(event_scroll->y);
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#if defined(GTK_VERSION3_4)
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// NOTE: in current implementation doesn't possible to put into callback function delta_x and delta_y separately
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double delta = (event->scroll.delta_x + event->scroll.delta_y);
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