Make notebook tabs scrollable

pluma/pluma-notebook.c

@@ -838,6 +838,16 @@ close_button_clicked_cb (PlumaTabLabel *tab_label, PlumaNotebook *notebook)
 	g_signal_emit (notebook, signals[TAB_CLOSE_REQUEST], 0, tab);
 }
 
+static gboolean
+tab_label_scroll_cb (PlumaTabLabel  *tab_label,
+                     GdkEventScroll *event,
+                     PlumaNotebook  *notebook)
+{
+	g_signal_emit_by_name (notebook, "scroll-event", &event);
+
+	return FALSE;
+}
+
 static GtkWidget *
 create_tab_label (PlumaNotebook *nb,
 		  PlumaTab      *tab)
@@ -850,6 +860,10 @@ create_tab_label (PlumaNotebook *nb,
 			  "close-clicked",
 			  G_CALLBACK (close_button_clicked_cb),
 			  nb);
+	g_signal_connect (tab_label,
+			  "scroll-event",
+			  G_CALLBACK (tab_label_scroll_cb),
+			  nb);
 
 	g_object_set_data (G_OBJECT (tab), "tab-label", tab_label);
 

pluma/pluma-tab-label.c

@@ -114,6 +114,16 @@ close_button_clicked_cb (GtkWidget     *widget,
 	g_signal_emit (tab_label, signals[CLOSE_CLICKED], 0, NULL);
 }
 
+static gboolean
+scroll_event_cb(GtkWidget      *widget,
+                GdkEventScroll *event,
+                PlumaTabLabel  *tab_label)
+{
+	g_signal_emit_by_name(tab_label, "scroll-event", &event);
+
+	return FALSE;
+}
+
 static void
 sync_tip (PlumaTab *tab, PlumaTabLabel *tab_label)
 {
@@ -265,6 +275,7 @@ pluma_tab_label_init (PlumaTabLabel *tab_label)
 	                                GTK_ORIENTATION_HORIZONTAL);
 
 	ebox = gtk_event_box_new ();
+	gtk_widget_add_events (ebox, GDK_SCROLL_MASK);
 	gtk_event_box_set_visible_window (GTK_EVENT_BOX (ebox), FALSE);
 	gtk_box_pack_start (GTK_BOX (tab_label), ebox, TRUE, TRUE, 0);
 	tab_label->priv->ebox = ebox;
@@ -273,6 +284,7 @@ pluma_tab_label_init (PlumaTabLabel *tab_label)
 	gtk_container_add (GTK_CONTAINER (ebox), hbox);
 
 	close_button = pluma_close_button_new ();
+	gtk_widget_add_events (close_button, GDK_SCROLL_MASK);
 	gtk_widget_set_tooltip_text (close_button, _("Close document"));
 	gtk_box_pack_start (GTK_BOX (tab_label), close_button, FALSE, FALSE, 0);
 	tab_label->priv->close_button = close_button;
@@ -281,6 +293,16 @@ pluma_tab_label_init (PlumaTabLabel *tab_label)
 			  "clicked",
 			  G_CALLBACK (close_button_clicked_cb),
 			  tab_label);
+
+	g_signal_connect (close_button,
+			  "scroll-event",
+			  G_CALLBACK (scroll_event_cb),
+			  tab_label);
+
+	g_signal_connect (ebox,
+			  "scroll-event",
+			  G_CALLBACK (scroll_event_cb),
+			  tab_label);
 
 	spinner = gtk_spinner_new ();
 	gtk_box_pack_start (GTK_BOX (hbox), spinner, FALSE, FALSE, 0);

pluma/pluma-window.c

@@ -36,6 +36,7 @@
 #include <sys/types.h>
 #include <string.h>
 
+#include <gdk/gdk.h>
 #include <glib/gi18n.h>
 #include <gio/gio.h>
 #include <gtk/gtk.h>
@@ -3488,6 +3489,23 @@ notebook_button_press_event (GtkNotebook    *notebook,
 	return FALSE;
 }
 
+static gboolean
+notebook_scroll_event (GtkNotebook    *notebook,
+                       GdkEventScroll *event,
+                       PlumaWindow    *window)
+{
+	if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_LEFT)
+	{
+		gtk_notebook_prev_page (notebook);
+	}
+	else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_RIGHT)
+	{
+		gtk_notebook_next_page (notebook);
+	}
+
+	return FALSE;
+}
+
 static gboolean
 notebook_popup_menu (GtkNotebook *notebook,
 		     PlumaWindow *window)
@@ -3854,6 +3872,10 @@ connect_notebook_signals (PlumaWindow *window,
 			  "popup-menu",
 			  G_CALLBACK (notebook_popup_menu),
 			  window);
+	g_signal_connect (notebook,
+			  "scroll-event",
+			  G_CALLBACK (notebook_scroll_event),
+			  window);
 }
 
 static void
@@ -3866,7 +3888,8 @@ add_notebook (PlumaWindow *window,
 	                 TRUE);
 
 	gtk_widget_show (notebook);
-
+
+	gtk_widget_add_events (notebook, GDK_SCROLL_MASK);
 	connect_notebook_signals (window, notebook);
 }