TreeView.h

// TreeView.h
//
    
namespace nkWinUi
{
    class TreeView : public Component
    {
        public :
 
            class Item
            {
                public :
 
                    Item () noexcept ;
                    virtual ~Item () ;
 
                    Item* addChild (Item* child) ;
                    Item* getChild (unsigned int index) const ;
                    unsigned int getChildCount () const ;
                    bool isParent () const ;
                    void disavowChild (Item* child) ;
 
                    void setText (nkMemory::StringView text) ;
                    void setIcon (Image* image) ;
                    nkMemory::StringView getText () const ;
                    Image* getIcon () const ;
 
                    void setParentTree (TreeView* parent) ;
                    TreeView* getParentTree () const ;
                    void setParentItem (Item* item) ;
                    Item* getParentItem () const ;
 
                    void setAttachedData (void* data) ;
                    void* getAttachedData () const ;
 
                    // Flags
                    bool getCollapsed () const ;
                    virtual void setCollapsed (bool value) ;
 
                    void exportIntrospection (nkExport::Node* rootNode) ;
            } ;
        
        public :
        
            TreeView (System* system) noexcept ;
            virtual ~TreeView () ;
 
            // Getters
            Item* getItemFromData (void* data) const ;
            virtual Item* getSelectedItem () = 0 ;
            virtual Item* getItemAtAbsoluteCursor (nkMaths::Point absCoords) = 0 ;
            virtual Item* getItemAtRelativeCursor (nkMaths::Point relCoords) = 0 ;
            bool getSelectOnRightClick () const ;
            std::function<void (TreeView*)> getSelectionCallback () const ;
 
            // Setters
            void setSelectionOnRightClick (bool value) ;
            void setSelectionCallback (std::function<void (TreeView*)> value) ;
 
            virtual Item* insertItem (nkMemory::StringView text, void* data, Item* parent = nullptr) ;
            virtual void deleteItem (Item* toDelete, bool keepChildrenOnUpper = false) ;
            virtual void changeItemLabel (Item* toChange, nkMemory::StringView label) ;
            virtual void clearItems () ;
            void collapseAll (bool status) ;
 
            void selectItemFromItsData (void* data) ;
            virtual void selectItem (Item* item) = 0 ;
            void selectItemFromAbsoluteCursor (nkMaths::Point absCoords) ;
            void selectItemFromRelativeCursor (nkMaths::Point relCoords) ;
 
            // Import / Export
            virtual void exportIntrospection (nkExport::Node* rootNode) override ;
            virtual void importClassFromTree (nkExport::Node* rootNode) override ;
 
        public :
 
            // Statics
            static nkMemory::UniquePtr<TreeView> create (System* system = nullptr) ;
    } ;
}