/*
 * An example of how to hide rows and columns using the libxlsxwriter
 * library.
 *
 * In order to hide rows without setting each one, (of approximately 1 million
 * rows), Excel uses an optimization to hide all rows that don't have data. In
 * Libxlsxwriter we replicate that using the worksheet_set_default_row()
 * function.
 *
 * Copyright 2014-2018, John McNamara, jmcnamara@cpan.org
 *
 */

#include "xlsxwriter.h"

int main() {

    /* Create a new workbook and add a worksheet. */
    lxw_workbook  *workbook  = workbook_new("hide_row_col.xlsx");
    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
    lxw_row_t row;

    /* Write some data. */
    worksheet_write_string(worksheet, 0, 3, "Some hidden columns.", NULL);
    worksheet_write_string(worksheet, 7, 0, "Some hidden rows.",    NULL);

    /* Hide all rows without data. */
    worksheet_set_default_row(worksheet, 15, LXW_TRUE);

    /* Set the height of empty rows that we want to display even if it is */
    /* the default height. */
    for (row = 1; row <= 6; row++)
        worksheet_set_row(worksheet, row, 15, NULL);

    /* Columns can be hidden explicitly. This doesn't increase the file size. */
    lxw_row_col_options options = {.hidden = 1};
    worksheet_set_column_opt(worksheet, COLS("G:XFD"), 8.43, NULL, &options);

    workbook_close(workbook);

    return 0;
}
