From f27d0293d6ba096c8b9a2325bf482e1c9c281de7 Mon Sep 17 00:00:00 2001
From: tamplan <tamplan@free.fr>
Date: Sun, 24 May 2020 12:58:45 +0200
Subject: Add tab scrolling support for dialog windows

---
 src/eom-preferences-dialog.c |  2 +-
 src/eom-properties-dialog.c  |  2 +-
 src/eom-util.c               | 23 ++++++++++++++++++++---
 src/eom-util.h               |  4 ++--
 4 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/src/eom-preferences-dialog.c b/src/eom-preferences-dialog.c
index 8ac8b7d..7b613b4 100644
--- a/src/eom-preferences-dialog.c
+++ b/src/eom-preferences-dialog.c
@@ -327,7 +327,7 @@ eom_preferences_dialog_init (EomPreferencesDialog *pref_dlg)
     gtk_widget_add_events (priv->notebook, GDK_SCROLL_MASK);
     g_signal_connect (priv->notebook,
                       "scroll-event",
-                      G_CALLBACK (eom_util_dialog_page_scroll_event_cb),
+                      G_CALLBACK (eom_notebook_page_scroll_event_cb),
                       NULL);
 }
 
diff --git a/src/eom-properties-dialog.c b/src/eom-properties-dialog.c
index 5b2446f..3295b2e 100644
--- a/src/eom-properties-dialog.c
+++ b/src/eom-properties-dialog.c
@@ -794,7 +794,7 @@ eom_properties_dialog_init (EomPropertiesDialog *prop_dlg)
     gtk_widget_add_events (priv->notebook, GDK_SCROLL_MASK);
     g_signal_connect (priv->notebook,
                       "scroll-event",
-                      G_CALLBACK (eom_util_dialog_page_scroll_event_cb),
+                      G_CALLBACK (eom_notebook_page_scroll_event_cb),
                       NULL);
 }
 
diff --git a/src/eom-util.c b/src/eom-util.c
index 9eccc73..69692d5 100644
--- a/src/eom-util.c
+++ b/src/eom-util.c
@@ -429,8 +429,8 @@ eom_util_show_file_in_filemanager (GFile *file, GtkWindow *toplevel)
 }
 
 gboolean
-eom_util_dialog_page_scroll_event_cb (GtkWidget         *widget,
-                                      GdkEventScroll    *event)
+eom_notebook_page_scroll_event_cb (GtkWidget         *widget,
+                                   GdkEventScroll    *event)
 
 {
     GtkNotebook *notebook = GTK_NOTEBOOK (widget);
@@ -466,7 +466,24 @@ eom_util_dialog_page_scroll_event_cb (GtkWidget         *widget,
             gtk_notebook_prev_page (notebook);
             break;
         case GDK_SCROLL_SMOOTH:
-        break;
+            switch (gtk_notebook_get_tab_pos (notebook))
+            {
+                case GTK_POS_LEFT:
+                case GTK_POS_RIGHT:
+                    if (event->delta_y > 0)
+                    gtk_notebook_next_page (notebook);
+                    else if (event->delta_y < 0)
+                    gtk_notebook_prev_page (notebook);
+                    break;
+                case GTK_POS_TOP:
+                case GTK_POS_BOTTOM:
+                    if (event->delta_x > 0)
+                    gtk_notebook_next_page (notebook);
+                    else if (event->delta_x < 0)
+                    gtk_notebook_prev_page (notebook);
+                    break;
+            }
+            break;
     }
 
     return TRUE;
diff --git a/src/eom-util.h b/src/eom-util.h
index a2b0ae8..b713721 100644
--- a/src/eom-util.h
+++ b/src/eom-util.h
@@ -65,8 +65,8 @@ G_GNUC_INTERNAL
 void     eom_util_show_file_in_filemanager   (GFile *file,
                                               GtkWindow *toplevel);
 
-gboolean eom_util_dialog_page_scroll_event_cb   (GtkWidget      *notebook,
-                                                 GdkEventScroll *event);
+gboolean eom_notebook_page_scroll_event_cb   (GtkWidget      *notebook,
+                                              GdkEventScroll *event);
 
 G_END_DECLS
 
-- 
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