[gnome-games/wip/aplazas/gamepad-navigation: 5/7] collection-icon-view: Add game selection accessors

[Adrien Plazas <aplazas src gnome org>]

commit 724dbc24d7b359ef4329b3abbb79942e5ad4b9f6
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Aug 5 14:44:48 2018 +0200

    collection-icon-view: Add game selection accessors
    
    Add has_game_selected(), select_default_game() and unselect_game()
    methods to allow the sidebar view to control access to its collection
    icon view.

 src/ui/collection-icon-view.vala | 39 +++++++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 10 deletions(-)
---
diff --git a/src/ui/collection-icon-view.vala b/src/ui/collection-icon-view.vala
index 93fd7cb0..a740c950 100644
--- a/src/ui/collection-icon-view.vala
+++ b/src/ui/collection-icon-view.vala
@@ -103,20 +103,39 @@ private class Games.CollectionIconView : Gtk.Stack {
                adjustment.set_value (0);
        }
 
-       [GtkCallback]
-       private bool on_gamepad_browse (Gtk.DirectionType direction) {
-               if (flow_box.get_selected_children ().length () == 0) {
-                       var first_child = flow_box.get_child_at_index (0);
-                       if (first_child == null)
-                               return false;
+       public bool has_game_selected () {
+               foreach (var child in flow_box.get_selected_children ())
+                       if (child.get_mapped ())
+                               return true;
 
-                       flow_box.select_child (first_child);
-                       // This is needed to start moving the cursor with the gamepad only.
-                       first_child.focus (direction);
+               return false;
+       }
 
-                       return true;
+       public bool select_default_game (Gtk.DirectionType direction) {
+               Gtk.FlowBoxChild? child;
+               for (int i = 0; (child = flow_box.get_child_at_index (i)) != null; i++) {
+                       if (child.get_mapped ()) {
+                               flow_box.select_child (child);
+                               // This is needed to start moving the cursor with the gamepad only.
+                               child.focus (direction);
+
+                               return true;
+                       }
                }
 
+               return false;
+       }
+
+       public void unselect_game () {
+               flow_box.unselect_all ();
+       }
+
+       [GtkCallback]
+       private bool on_gamepad_browse (Gtk.DirectionType direction) {
+               if (!has_game_selected ())
+                       // This is needed to start moving the cursor with the gamepad only.
+                       return select_default_game (direction);
+
                switch (direction) {
                case Gtk.DirectionType.UP:
                        return flow_box.move_cursor (Gtk.MovementStep.DISPLAY_LINES, -1);