virtual BOOL on_scroll( HELEMENT he, HELEMENT target, SCROLL_EVENTS cmd, INT pos, BOOL isVertical )
{
if(!isVertical)
return FALSE;
int visible_rows = num_data_rows(he);
int row = first_row_idx;
switch( cmd )
{
case SCROLL_HOME: row = 0; break;
case SCROLL_END: row = num_rows - visible_rows + 1; break;
case SCROLL_STEP_PLUS: row += 1; break;
case SCROLL_STEP_MINUS: row -= 1; break;
case SCROLL_PAGE_PLUS: row += visible_rows; break;
case SCROLL_PAGE_MINUS: row -= visible_rows; break;
case SCROLL_POS: row = pos; break;
default: return FALSE;
}
row = aux::limit(row, 0, num_rows - visible_rows + 1);
if( row == first_row_idx ) return TRUE;
first_row_idx = row;
get_rows_data(he);
dom::scrollbar sb = get_v_scrollbar(he);
sb.set_values(first_row_idx, 0, num_rows, num_data_rows(he), 1);
return TRUE;
}
virtual BOOL on_event (HELEMENT he, HELEMENT target, BEHAVIOR_EVENTS type, UINT_PTR reason )
{
if( type != INIT_DATA_VIEW ) return FALSE;
first_row_idx = 0;
get_rows_data( he );
dom::scrollbar sb = get_v_scrollbar(he);
sb.set_values(first_row_idx, 0, num_rows, num_data_rows(he), 1);
return TRUE;
}
virtual BOOL on_scroll( HELEMENT he, HELEMENT target, SCROLL_EVENTS cmd, INT pos, BOOL isVertical )
{
if(!isVertical)
return FALSE;
int visible_rows = num_data_rows(he);
int row = first_row_idx;
switch( cmd )
{
case SCROLL_HOME: row = 0; break;
case SCROLL_END: row = num_rows - visible_rows + 1; break;
case SCROLL_STEP_PLUS: row += 1; break;
case SCROLL_STEP_MINUS: row -= 1; break;
case SCROLL_PAGE_PLUS: row += visible_rows; break;
case SCROLL_PAGE_MINUS: row -= visible_rows; break;
case SCROLL_POS: row = pos; break;
default: return FALSE;
}
row = aux::limit(row, 0, num_rows - visible_rows + 1);
if( row == first_row_idx ) return TRUE;
first_row_idx = row;
dom::element tbl = get_table(he);
tbl.update(); // establish update 'umbrella'
get_rows_data(he);
dom::scrollbar sb = get_v_scrollbar(he);
sb.set_values(first_row_idx, 0, num_rows, num_data_rows(he), 1);
HTMLayoutUpdateWindow(tbl.get_element_hwnd(TRUE));
return TRUE;
}