improve animation panel

src/node_panel_animation.h

@@ -33,6 +33,7 @@ public:
     
     int m_frames_count = 1;
     int m_frame = 0;
+    int m_onion_size = 1;
     glm::vec4 m_cursor_color = { 1, 0, 0, 1 };
 
     virtual Node* clone_instantiate() const override { return new this_class; }
@@ -57,6 +58,8 @@ class NodePanelAnimation : public Node
     NodeAnimationFrame* m_selected_frame = nullptr;
     NodeAnimationTimeline* m_timeline = nullptr;
     NodeComboBox* m_fps = nullptr;
+    NodeComboBox* m_onion = nullptr;
+    NodeText* m_frame_label = nullptr;
     int m_selected_frame_index = -1;
     uint32_t m_selected_frame_layer_id = 0;
     float m_playback_timer = 0;
@@ -69,9 +72,12 @@ public:
     virtual void init() override;
     virtual void added(Node* parent) override;
     virtual void on_tick(float dt) override;
+    virtual void handle_resize(glm::vec2 old_size, glm::vec2 new_size, float zoom) override;
 
     void init_controls();
     void load_layers();
+    void update_frames();
+    int get_onion_size() const noexcept { return m_onion->get_int(); }
 };
 
 //////////////////////////////////////////////////////////////////////////