ds_pager.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_PAGER_H
#define _DS_PAGER_H
 
 
#include <ds_view.h>
#include <ds_timer.h>
 
 
class DsPager: public DsView
{
public:
    DsPager(DsView* parent, const DsPoint &pos, const DsSize &size, const DsOrientation &orientation = DS_HORIZONTAL);
 
    void insertPage(DsView* page, size_t pos = -1);
    void removePage(size_t pos);
 
    void update(void);
 
private:
    typedef struct link_s
    {
        DsView* page;
        struct link_s* next;
    }link_t;
 
    DsOrientation mOrientation;
    int32_t mDimension;
 
    link_t mLinks[16];
    link_t* mFreeLinks;
 
    link_t* mPageListHead;
    size_t mPageCount;
 
 
    int32_t mScrollPosition;        //in pixels
 
    int32_t mSnapStepCount;
    int32_t mSnapStep;
    int32_t mSnapStart;
    int32_t mSnapEnd;
 
 
    bool mIsTouchActive;
    uint32_t mTouchPos;
    uint32_t mScrollOffsetBase;
 
    DsTimer mTimer;
 
    void onPaintOver(DsRenderer &renderer) override final;
    bool onTouch(const DsTouchEvent &event) override final;
 
    void snapScroll(void);
 
 
    link_t* removeLink(size_t pos);
    void insertLink(link_t* link, size_t pos = -1);
    link_t* allocLink(void);
    void freeLink(link_t* link);
};
 
#endif