From b931a8f99fc07cf860819507e18546bb9583a2f1 Mon Sep 17 00:00:00 2001
From: Laurent Napias <tamplan@free.fr>
Date: Wed, 26 Jun 2019 22:51:52 +0200
Subject:  Add scroll tabs with mouse wheel in severals capplets

---
 capplets/common/capplet-util.c | 60 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

(limited to 'capplets/common/capplet-util.c')

diff --git a/capplets/common/capplet-util.c b/capplets/common/capplet-util.c
index d2458d9b..b9fde6bb 100644
--- a/capplets/common/capplet-util.c
+++ b/capplets/common/capplet-util.c
@@ -170,6 +170,66 @@ capplet_file_delete_recursive (GFile *file, GError **error)
 		return g_file_delete (file, NULL, error);
 }
 
+gboolean
+capplet_dialog_page_scroll_event_cb (GtkWidget *widget, GdkEventScroll *event, GtkWindow *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;
+    case GDK_SCROLL_SMOOTH:
+        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;
+}
+
 void
 capplet_init (GOptionContext *context,
 	      int *argc,
-- 
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