add panels docking

src/node.h

@@ -126,7 +126,9 @@ public:
     glm::vec2 m_pos_offset{ 0, 0 }; // artificial position offset for scrolling
     glm::vec2 m_pos_offset_childred{ 0, 0 }; // artificial position offset for scrolling
     glm::vec2 m_size{ 0, 0 };
+    // rect: {origin}{size}
     glm::vec4 m_clip{ 0, 0, 0, 0 };
+    // rect: {origin}{size}
     glm::vec4 m_clip_uncut{ 0, 0, 0, 0 };
     std::string m_name;
     bool m_display = true;
@@ -148,6 +150,10 @@ public:
     void SetMaxWidthP(float value);
     void SetMaxHeight(float value);
     void SetMaxHeightP(float value);
+    void SetMinWidth(float value);
+    void SetMinWidthP(float value);
+    void SetMinHeight(float value);
+    void SetMinHeightP(float value);
 
     void SetPadding(float t, float r, float b, float l);
     glm::vec4 GetPadding() const;
@@ -229,11 +235,23 @@ public:
         add_child(n);
         return n;
     }
+    template<class T> std::shared_ptr<T> add_child_ref()
+    {
+        auto n = std::make_shared<T>();
+        n->m_manager = m_manager;
+        n->m_parent = m_parent;
+        n->init();
+        n->create();
+        n->loaded();
+        add_child(n);
+        return n;
+    }
 
     virtual void on_tick(float dt) { };
     virtual kEventResult on_event(Event* e);
     virtual kEventResult handle_event(Event* e);
     virtual void handle_resize(glm::vec2 old_size, glm::vec2 new_size);
+    virtual void handle_parent_resize(glm::vec2 old_size, glm::vec2 new_size);
     virtual void create();
     virtual void init();
     virtual void loaded();
@@ -254,11 +272,13 @@ public:
     void remove_child(Node* n);
     void remove_all_children();
     void move_child(Node* n, int index);
+    void move_child_front(Node* n);
     void move_child_offset(Node* n, int offset);
     int get_child_index(Node* n);
     Node* get_child_at(int index);
     // returns {origin, size} form
     glm::vec4 get_children_rect() const;
+    std::vector<std::shared_ptr<Node>> get_children_at_point(glm::vec2 point) const;
     bool is_child_recursive(Node* o) const;
     bool is_child(Node* o) const;
     void mouse_capture();