chart_pattern.c

<< chart_fonts.c

chart_styles.c >>

An example of creating a simple chart with different patterns.

/*
 * An example of a simple Excel chart with patterns using the libxlsxwriter
 * library.
 *
 * Copyright 2014-2025, John McNamara, jmcnamara@cpan.org
 *
 */
 
#include "xlsxwriter.h"
 
 
/* Create a worksheet with a chart. */
int main() {
 
    lxw_workbook  *workbook  = workbook_new("chart_pattern.xlsx");
    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
    lxw_chart *chart;
 
 
    /* Add a bold format to use to highlight the header cells. */
    lxw_format *bold = workbook_add_format(workbook);
    format_set_bold(bold);
 
    /* Write some data for the chart. */
    worksheet_write_string(worksheet, 0, 0, "Shingle", bold);
    worksheet_write_number(worksheet, 1, 0, 105,       NULL);
    worksheet_write_number(worksheet, 2, 0, 150,       NULL);
    worksheet_write_number(worksheet, 3, 0, 130,       NULL);
    worksheet_write_number(worksheet, 4, 0, 90,        NULL);
    worksheet_write_string(worksheet, 0, 1, "Brick",   bold);
    worksheet_write_number(worksheet, 1, 1, 50,        NULL);
    worksheet_write_number(worksheet, 2, 1, 120,       NULL);
    worksheet_write_number(worksheet, 3, 1, 100,       NULL);
    worksheet_write_number(worksheet, 4, 1, 110,       NULL);
 
    /* Create a chart object. */
    chart = workbook_add_chart(workbook, LXW_CHART_COLUMN);
 
    /* Configure the chart. */
    lxw_chart_series *series1 = chart_add_series(chart, NULL, "Sheet1!$A$2:$A$5");
    lxw_chart_series *series2 = chart_add_series(chart, NULL, "Sheet1!$B$2:$B$5");
 
    chart_series_set_name(series1, "=Sheet1!$A$1");
    chart_series_set_name(series2, "=Sheet1!$B$1");
 
    chart_title_set_name(chart,        "Cladding types");
    chart_axis_set_name(chart->x_axis, "Region");
    chart_axis_set_name(chart->y_axis, "Number of houses");
 
 
    /* Configure an add the chart series patterns. */
    lxw_chart_pattern pattern1 = {.type = LXW_CHART_PATTERN_SHINGLE,
                                  .fg_color = 0x804000,
                                  .bg_color = 0XC68C53};
 
    lxw_chart_pattern pattern2 = {.type = LXW_CHART_PATTERN_HORIZONTAL_BRICK,
                                  .fg_color = 0XB30000,
                                  .bg_color = 0XFF6666};
 
    chart_series_set_pattern(series1, &pattern1);
    chart_series_set_pattern(series2, &pattern2);
 
    /* Configure and set the chart series borders. */
    lxw_chart_line line1 = {.color = 0x804000};
    lxw_chart_line line2 = {.color = 0xb30000};
 
    chart_series_set_line(series1, &line1);
    chart_series_set_line(series2, &line2);
 
    /* Widen the gap between the series/categories. */
    chart_set_series_gap(chart, 70);
 
    /* Insert the chart into the worksheet. */
    worksheet_insert_chart(worksheet, CELL("D2"), chart);
 
    return workbook_close(workbook);
}