From 8d2eb0898154f2624e2ae34039169f307a3411a5 Mon Sep 17 00:00:00 2001
From: noone3 <boris.woerner@gmail.com>
Date: Mon, 15 Aug 2016 17:16:51 +0200
Subject: [PATCH] add (mouse wheel) tab scrolling

Mouse wheel scrolling was removed in gtk3.
Add functionality back via patch to mate-terminal, patch was originally against gnome-terminal (from https://git.gnome.org/browse/gnome-terminal/commit/?id=e2299ee2451167ad41b35705b4fbd577aebd0c39 )
---
 src/terminal-window.c | 53 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/src/terminal-window.c b/src/terminal-window.c
index e7b53a2..132b98b 100644
--- a/src/terminal-window.c
+++ b/src/terminal-window.c
@@ -157,6 +157,9 @@ static void notebook_page_removed_callback   (GtkWidget       *notebook,
         GtkWidget       *container,
         guint            page_num,
         TerminalWindow  *window);
+static gboolean notebook_scroll_event_cb     (GtkWidget      *notebook,
+                                              GdkEventScroll *event,
+                                              TerminalWindow *window);
 
 /* Menu action callbacks */
 static void file_new_window_callback          (GtkAction *action,
@@ -2022,7 +2025,11 @@ terminal_window_init (TerminalWindow *window)
     g_signal_connect_data (priv->notebook, "page-reordered",
                            G_CALLBACK (terminal_window_update_tabs_menu_sensitivity),
                            window, NULL, G_CONNECT_SWAPPED | G_CONNECT_AFTER);
-
+                           
+    gtk_widget_add_events (priv->notebook, GDK_SCROLL_MASK);
+    g_signal_connect (priv->notebook, "scroll-event",
+                            G_CALLBACK (notebook_scroll_event_cb), window);
+                            
     g_signal_connect (priv->notebook, "create-window",
                     G_CALLBACK (handle_tab_droped_on_desktop), window);
 
@@ -2885,6 +2892,50 @@ terminal_window_update_copy_selection (TerminalScreen *screen,
             TERMINAL_PROFILE_COPY_SELECTION);
 }
 
+static gboolean
+notebook_scroll_event_cb (GtkWidget      *widget,
+                          GdkEventScroll *event,
+                          TerminalWindow *window)
+{
+  GtkNotebook *notebook = GTK_NOTEBOOK (widget);
+  GtkWidget *child, *event_widget, *action_widget;
+
+  child = gtk_notebook_get_nth_page (notebook, gtk_notebook_get_current_page (notebook));
+  if (child == NULL)
+    return FALSE;
+
+  event_widget = gtk_get_event_widget ((GdkEvent *) event);
+
+  /* Ignore scroll events from the content of the page */
+  if (event_widget == NULL ||
+      event_widget == child ||
+      gtk_widget_is_ancestor (event_widget, child))
+    return FALSE;
+
+  /* And also from the action widgets */
+  action_widget = gtk_notebook_get_action_widget (notebook, GTK_PACK_START);
+  if (event_widget == action_widget ||
+      (action_widget != NULL && gtk_widget_is_ancestor (event_widget, action_widget)))
+    return FALSE;
+  action_widget = gtk_notebook_get_action_widget (notebook, GTK_PACK_END);
+  if (event_widget == action_widget ||
+      (action_widget != NULL && gtk_widget_is_ancestor (event_widget, action_widget)))
+    return FALSE;
+
+  switch (event->direction) {
+    case GDK_SCROLL_RIGHT:
+    case GDK_SCROLL_DOWN:
+      gtk_notebook_next_page (notebook);
+      break;
+    case GDK_SCROLL_LEFT:
+    case GDK_SCROLL_UP:
+      gtk_notebook_prev_page (notebook);
+      break;
+    }
+
+  return TRUE;
+}
+
 void
 terminal_window_update_geometry (TerminalWindow *window)
 {