From 6a4266535f537c7bbc7964245cb0d5f4fa1311db Mon Sep 17 00:00:00 2001
From: Laurent Napias <tamplan@free.fr>
Date: Mon, 8 Jul 2019 21:19:54 +0200
Subject: [clock-applet] Add scroll interface tabs with mouse wheel

---
 applets/clock/clock.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 70 insertions(+), 1 deletion(-)

(limited to 'applets/clock')

diff --git a/applets/clock/clock.c b/applets/clock/clock.c
index b752099a..7a4ba290 100644
--- a/applets/clock/clock.c
+++ b/applets/clock/clock.c
@@ -3245,13 +3245,82 @@ ensure_prefs_window_is_created (ClockData *cd)
         fill_prefs_window (cd);
 }
 
+static gboolean
+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;
+}
+
 static void
 display_properties_dialog (ClockData *cd, gboolean start_in_locations_page)
 {
         ensure_prefs_window_is_created (cd);
 
+        GtkWidget *notebook = _clock_get_widget (cd, "notebook");
+        gtk_widget_add_events (notebook, GDK_SCROLL_MASK);
+        g_signal_connect (GTK_NOTEBOOK (notebook), "scroll-event",
+                          G_CALLBACK (dialog_page_scroll_event_cb), GTK_WINDOW (cd->prefs_window));
+        
+
         if (start_in_locations_page) {
-                GtkWidget *notebook = _clock_get_widget (cd, "notebook");
                 gtk_notebook_set_current_page (GTK_NOTEBOOK (notebook), 1);
         }
 
-- 
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