listview.h

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#pragma once
 
#include <promeki/core/namespace.h>
#include <promeki/core/string.h>
#include <promeki/core/stringlist.h>
#include <promeki/tui/widget.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class TuiPainter;
class TuiPalette;
 
class TuiListView : public TuiWidget {
        PROMEKI_OBJECT(TuiListView, TuiWidget)
        public:
                TuiListView(ObjectBase *parent = nullptr);
                ~TuiListView() override;
 
                void addItem(const String &item);
                void insertItem(int index, const String &item);
                void setItems(const StringList &items);
                void clear();
 
                int currentIndex() const { return _currentIndex; }
                void setCurrentIndex(int index);
 
                String currentItem() const;
                int count() const { return static_cast<int>(_items.size()); }
 
                int scrollOffset() const { return _scrollOffset; }
 
                void scrollBy(int delta);
 
                void ensureVisible(int index);
 
                Size2Di32 sizeHint() const override;
 
                PROMEKI_SIGNAL(currentItemChanged, int)
                PROMEKI_SIGNAL(itemActivated, int)
 
        protected:
                void paintEvent(TuiPaintEvent *e) override;
                void keyEvent(KeyEvent *e) override;
                void mouseEvent(MouseEvent *e) override;
 
        private:
                StringList      _items;
                int             _currentIndex = -1;
                int             _scrollOffset = 0;
                bool            _dragging = false;
                int             _dragOffset = 0;        
 
                int contentWidth() const;
                void paintScrollbar(TuiPainter &painter, const TuiPalette &pal);
                int thumbPos() const;
                int thumbSize() const;
                int trackHeight() const;
};
 
PROMEKI_NAMESPACE_END