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Diffstat (limited to 'src/lib/elementary/efl_page_transition_scroll.h')
| -rw-r--r-- | src/lib/elementary/efl_page_transition_scroll.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/lib/elementary/efl_page_transition_scroll.h b/src/lib/elementary/efl_page_transition_scroll.h new file mode 100644 index 0000000000..b4203d7706 --- /dev/null +++ b/src/lib/elementary/efl_page_transition_scroll.h @@ -0,0 +1,93 @@ +#ifndef EFL_PAGE_TRANSITION_SCROLL_H +#define EFL_PAGE_TRANSITION_SCROLL_H + +//#include "efl_ui_widget_pager.h" + + +/** + * This is a description on how scroll transition works. + * + * Regardless of the number of pages, scroll transition maintains a fixed number + * of boxes which can contain pages. The boxes move along with scrolling and + * some of them are emptied or filled as they come in or out of screen area. + * When pager is scrolled left or right, each box takes the position of its + * previous or next box. Since the leftmost and rightmost boxes might move in + * reverse direction, they shouldn't be visible. This is why there are dummy + * boxes at both ends. + * + * Here is an example of box arrangement change by scrolling. + * The pager has 10 pages, numbered from 1 to 10. + * The current page is page5, and side_page_num equals 1. + * + * head |----- screen area ----| tail + * (dummy) | | (dummy) + * ---------- ---------- ---------- ---------- ---------- + * | BOX1 | | BOX2 | | BOX3 | | BOX4 | | BOX5 | + * | | | | | | | | | | + * | (empty)| | page4 | | page5 | | page6 | | (empty)| + * | | | | | | | | | | + * | | | | | | | | | | + * | | | | | | | | | | + * ---------- ---------- ---------- ---------- ---------- + * | | + * |----------------------| + * + * After scrolling left, + * 1. each box takes the position of it's previous box. + * 2. head and tail is changed. + * 3. The box moved to the end is emptied. + * 4. The box moved from the end is filled with content. + * + * head tail + * ---------- ---------- ---------- ---------- ---------- + * | BOX2 | | BOX3 | | BOX4 | | BOX5 | | BOX1 | + * | | | | | | | | | | + * | (empty)| | page5 | | page6 | | page7 | | (empty)| + * |*emptied| | | | | |*filled | | | + * | | | | | | | | | | + * | | | | | | | | | | + * ---------- ---------- ---------- ---------- ---------- + * + */ + + +typedef struct _Page_Info +{ + Evas_Map *map; + int id; + int pos; + int content_num; + Eo *obj; + Eo *content; + + Eina_Rectangle geometry; + Eina_Rectangle temp; + + struct _Page_Info *prev, *next; + + Eina_Bool visible; + Eina_Bool vis_page; + +} Page_Info; + +typedef struct _Efl_Page_Transition_Scroll_Data Efl_Page_Transition_Scroll_Data; + +struct _Efl_Page_Transition_Scroll_Data +{ + Eina_List *page_infos; + + Page_Info *head, *tail; + + int page_info_num; + int side_page_num; + + Eo *foreclip; + Eo *backclip; + Eina_Rectangle viewport; +}; + +#define EFL_PAGE_TRANSITION_SCROLL_DATA_GET(o, pd) \ + Efl_Page_Transition_Scroll_Data *pd = \ + efl_data_scope_get(o, EFL_PAGE_TRANSITION_SCROLL_CLASS) + +#endif |