Fixes #517 - Add a button with the ability to hide/single layers

src/editor/editor.hpp

@@ -51,6 +51,7 @@ class Editor final : public Screen,
 {
 public:
   static bool is_active();
+  inline EditorLayersWidget* get_layers_widget() const { return m_layers_widget; }
 
 private:
   static bool is_autosave_file(const std::string& filename) {

src/editor/layers_widget.cpp

@@ -495,10 +495,14 @@ EditorLayersWidget::set_selected_tilemap(TileMap* tilemap)
 {
   TileMap* selected_tilemap = get_selected_tilemap();
   if (selected_tilemap)
+  {
     selected_tilemap->m_editor_active = false;
+    selected_tilemap->set_alpha(0.5f);
+  }
 
   m_selected_tilemap = tilemap->get_uid();
   tilemap->m_editor_active = true;
+  tilemap->set_alpha(1.0f);
 }
 
 Vector

src/editor/object_menu.cpp

@@ -54,6 +54,20 @@ ObjectMenu::refresh()
     }
   }
 
+  TileMap* selected_tilemap = m_editor.get_layers_widget()->get_selected_tilemap();
+  if (m_object != selected_tilemap) 
+  {
+    const float current_alpha = static_cast<TileMap*>(m_object)->get_alpha();
+    if (current_alpha > 0.0f) 
+    {
+      add_entry(MNID_HIDE_LAYER, _("Hide Layer"));
+    } 
+    else 
+    {
+      add_entry(MNID_HIDE_LAYER, _("Show Layer"));
+    }
+  }
+
   if (!m_object->is_up_to_date())
   {
     add_hl();
@@ -86,6 +100,25 @@ ObjectMenu::menu_action(MenuItem& item)
         refresh();
       });
       break;
+
+    case MNID_HIDE_LAYER:
+      if (m_object) 
+      {
+        TileMap* tilemap = static_cast<TileMap*>(m_object);
+        const float current_alpha = static_cast<TileMap*>(m_object)->get_alpha();
+        if (current_alpha > 0.0f) 
+        {
+          tilemap->set_alpha(0.0f);
+        } 
+        else 
+        {
+          tilemap->set_alpha(1.0f);
+        }
+        m_editor.m_reactivate_request = true;
+        refresh();
+      }
+      MenuManager::instance().pop_menu();
+      break;
 
     case MNID_PATCH_NOTES:
     {

src/editor/object_menu.hpp

@@ -29,6 +29,7 @@ class ObjectMenu final : public Menu
 public:
   enum {
     MNID_UPDATE,
+    MNID_HIDE_LAYER,
     MNID_PATCH_NOTES,
     MNID_REMOVE,
     MNID_REMOVEFUNCTION,