ds_list.h

/* Copyright (C) 2017 - 2024, Thornwave Labs Inc - All Rights Reserved.
 * Unauthorized copying of this file, via any medium is strictly prohibited.
 * Proprietary and confidential.
 * Written by Razvan Turiac <razvan.turiac@thornwave.com>
*/
 
#ifndef _DS_LIST_H
#define _DS_LIST_H
 
 
#include <ds_view.h>
#include <ds_selection_base.h>
 
 
class DsList: public DsView, public DsSelectionBase
{
public:
    class Listener
    {
    public:
        virtual int32_t onListGetLength(DsList* object) = 0;
 
 
        virtual void onListGetView(DsList* object, DsView* holder, int32_t index, bool is_selected) = 0;
    };
 
 
    DsList(DsView* parent, const DsPoint &pos, const DsSize &size);
 
    
    void addViewHolder(DsView* holder);
 
    
    void setListener(Listener* listener);
    
    
    void setRowGap(uint32_t gap);
 
    
    void setMargin(uint32_t margin);
    
 
    void setScrollbarColor(DsColor color);
 
 
    void setCursorColor(DsColor color, bool always_visible);
 
 
private:
    struct link_t
    {
        DsView* holder;
        int32_t index;
        link_t* next;
        link_t* prev;
    };
 
    link_t* mFreeViewHolders;
    link_t* mUsedViewHoldersHead;
    link_t* mUsedViewHoldersTail;
 
    DsRect mCursorRegion;
    DsColor mCursorColor;
 
    int32_t mRowHeight;
    int32_t mRowGapTop;
    int32_t mRowGapBottom;
    int32_t mMargin;
 
    DsRect mActiveAreaRegion;
 
    Listener* mListener;
 
    struct
    {
        uint8_t mIsTouchActive: 1;
        uint8_t mCursorIsAlwaysVisible: 1;
    };
 
    void onShow(void) override final;
    
    void onPaint(DsRenderer &renderer) override final;
    void onPaintOver(DsRenderer &renderer) override final;
    bool onTouch(const DsTouchEvent &event) override final;
    void onSizeChange(void) override final;
    int32_t onSelectionChange(int32_t selection) override final;
    void getSelectionCount(void) override final;
 
    void saturateScrollPosition(bool extended);
    void update(void);
 
    void removeLinkHead(void);
    void removeLinkTail(void);
    void insertLinkHead(link_t* link);
    void insertLinkTail(link_t* link);
    link_t* allocLink(void);
    void freeLink(link_t* link);
};
 
#endif