files-view: Open context menu on longpress

An important portion of file management functionality
is exclusively available through context menus.

Currently, when using a touchscreen, there is no way
to open a context menu.

Fix this adding a longpress gesture to popup context
menus on canvas view and list view.

Closes: https://gitlab.gnome.org/GNOME/nautilus/issues/178

1 files changed, 41 insertions, 4 deletions

diff --git a/src/nautilus-canvas-view.c b/src/nautilus-canvas-view.c
index 761273903..90275dab4 100644
--- a/src/nautilus-canvas-view.c
+++ b/src/nautilus-canvas-view.c
@@ -1182,24 +1182,26 @@ selection_changed_callback (NautilusCanvasContainer *container,
 
 static void
 canvas_container_context_click_selection_callback (NautilusCanvasContainer *container,
-                                                   GdkEventButton          *event,
+                                                   const GdkEvent          *event,
                                                    NautilusCanvasView      *canvas_view)
 {
     g_assert (NAUTILUS_IS_CANVAS_CONTAINER (container));
     g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
 
-    nautilus_files_view_pop_up_selection_context_menu (NAUTILUS_FILES_VIEW (canvas_view), event);
+    nautilus_files_view_pop_up_selection_context_menu (NAUTILUS_FILES_VIEW (canvas_view),
+                                                       (GdkEvent *) event);
 }
 
 static void
 canvas_container_context_click_background_callback (NautilusCanvasContainer *container,
-                                                    GdkEventButton          *event,
+                                                    const GdkEvent          *event,
                                                     NautilusCanvasView      *canvas_view)
 {
     g_assert (NAUTILUS_IS_CANVAS_CONTAINER (container));
     g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
 
-    nautilus_files_view_pop_up_background_context_menu (NAUTILUS_FILES_VIEW (canvas_view), event);
+    nautilus_files_view_pop_up_background_context_menu (NAUTILUS_FILES_VIEW (canvas_view),
+                                                        (GdkEvent *) event);
 }
 
 static char *
@@ -1344,16 +1346,51 @@ nautilus_canvas_view_update_click_mode (NautilusCanvasView *canvas_view)
 }
 
 static void
+canvas_container_longpress_gesture_pressed_callback (GtkGestureLongPress *gesture,
+                                                     gdouble              x,
+                                                     gdouble              y,
+                                                     gpointer             user_data)
+{
+    GdkEventSequence *event_sequence;
+    GdkEvent *event;
+    NautilusCanvasView *view = NAUTILUS_CANVAS_VIEW (user_data);
+
+    event_sequence = gtk_gesture_get_last_updated_sequence (GTK_GESTURE (gesture));
+    event = (GdkEvent *) gtk_gesture_get_last_event (GTK_GESTURE (gesture), event_sequence);
+
+    if (nautilus_view_get_selection (NAUTILUS_VIEW (view)))
+    {
+        nautilus_files_view_pop_up_selection_context_menu (NAUTILUS_FILES_VIEW (view),
+                                                           event);
+    }
+    else
+    {
+        nautilus_files_view_pop_up_background_context_menu (NAUTILUS_FILES_VIEW (view),
+                                                           (GdkEvent *) event);
+    }
+}
+
+static void
 initialize_canvas_container (NautilusCanvasView      *canvas_view,
                              NautilusCanvasContainer *canvas_container)
 {
     GtkWidget *content_widget;
+    GtkGesture *longpress_gesture;
 
     content_widget = nautilus_files_view_get_content_widget (NAUTILUS_FILES_VIEW (canvas_view));
     canvas_view->canvas_container = GTK_WIDGET (canvas_container);
     g_object_add_weak_pointer (G_OBJECT (canvas_container),
                                (gpointer *) &canvas_view->canvas_container);
 
+    longpress_gesture = gtk_gesture_long_press_new (GTK_WIDGET (content_widget));
+    gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (longpress_gesture),
+                                                GTK_PHASE_CAPTURE);
+    gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (longpress_gesture),
+                                       TRUE);
+    g_signal_connect (longpress_gesture, "pressed",
+                      (GCallback) canvas_container_longpress_gesture_pressed_callback,
+                      canvas_view);
+
     gtk_widget_set_can_focus (GTK_WIDGET (canvas_container), TRUE);
 
     g_signal_connect_object (canvas_container, "activate",