mirror of
https://github.com/jmcnamara/libxlsxwriter
synced 2025-03-28 21:13:14 +00:00
133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/*
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* An example of creating an Excel pie chart using the libxlsxwriter library.
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*
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* The demo also shows how to set segment colors. It is possible to define
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* chart colors for most types of libxlsxwriter charts via the series
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* formatting functions. However, Pie/Doughnut charts are a special case since
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* each segment is represented as a point so it is necessary to assign
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* formatting to each point in the series.
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*
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* Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
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*
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*/
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#include "xlsxwriter.h"
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/*
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* Write some data to the worksheet.
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*/
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void write_worksheet_data(lxw_worksheet *worksheet, lxw_format *bold) {
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worksheet_write_string(worksheet, CELL("A1"), "Category", bold);
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worksheet_write_string(worksheet, CELL("A2"), "Apple", NULL);
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worksheet_write_string(worksheet, CELL("A3"), "Cherry", NULL);
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worksheet_write_string(worksheet, CELL("A4"), "Pecan", NULL);
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worksheet_write_string(worksheet, CELL("B1"), "Values", bold);
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worksheet_write_number(worksheet, CELL("B2"), 60, NULL);
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worksheet_write_number(worksheet, CELL("B3"), 30, NULL);
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worksheet_write_number(worksheet, CELL("B4"), 10, NULL);
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}
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/*
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* Create a worksheet with examples charts.
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*
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*/
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int main() {
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lxw_workbook *workbook = workbook_new("chart_pie.xlsx");
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lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
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lxw_chart *chart ;
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lxw_chart_series *series;
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/* Add a bold format to use to highlight the header cells. */
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lxw_format *bold = workbook_add_format(workbook);
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format_set_bold(bold);
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/* Write some data for the chart. */
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write_worksheet_data(worksheet, bold);
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/*
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* Chart 1: Create a simple pie chart.
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*/
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chart = workbook_add_chart(workbook, LXW_CHART_PIE);
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/* Add the first series to the chart. */
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series = chart_add_series(chart, "=Sheet1!$A$2:$A$4", "=Sheet1!$B$2:$B$4");
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/* Set the name for the series instead of the default "Series 1". */
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chart_series_set_name(series, "Pie sales data");
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/* Add a chart title. */
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chart_title_set_name(chart, "Popular Pie Types");
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/* Set an Excel chart style. */
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chart_set_style(chart, 10);
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/* Insert the chart into the worksheet. */
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worksheet_insert_chart(worksheet, CELL("D2"), chart);
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/*
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* Chart 2: Create a pie chart with user defined segment colors.
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*/
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chart = workbook_add_chart(workbook, LXW_CHART_PIE);
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/* Add the first series to the chart. */
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series = chart_add_series(chart, "=Sheet1!$A$2:$A$4", "=Sheet1!$B$2:$B$4");
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/* Set the name for the series instead of the default "Series 1". */
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chart_series_set_name(series, "Pie sales data");
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/* Add a chart title. */
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chart_title_set_name(chart, "Pie Chart with user defined colors");
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/* Add for fills for use in the chart. */
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lxw_chart_fill fill1 = {.color = 0x5ABA10};
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lxw_chart_fill fill2 = {.color = 0xFE110E};
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lxw_chart_fill fill3 = {.color = 0xCA5C05};
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/* Add some points with the above fills. */
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lxw_chart_point point1 = {.fill = &fill1};
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lxw_chart_point point2 = {.fill = &fill2};
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lxw_chart_point point3 = {.fill = &fill3};
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/* Create an array of the point objects. */
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lxw_chart_point *points[] = {&point1,
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&point2,
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&point3,
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NULL};
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/* Add/override the points/segments of the chart. */
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chart_series_set_points(series, points);
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/* Insert the chart into the worksheet. */
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worksheet_insert_chart(worksheet, CELL("D18"), chart);
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/*
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* Chart 3: Create a pie chart with rotation of the segments.
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*/
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chart = workbook_add_chart(workbook, LXW_CHART_PIE);
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/* Add the first series to the chart. */
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series = chart_add_series(chart, "=Sheet1!$A$2:$A$4", "=Sheet1!$B$2:$B$4");
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/* Set the name for the series instead of the default "Series 1". */
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chart_series_set_name(series, "Pie sales data");
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/* Add a chart title. */
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chart_title_set_name(chart, "Pie Chart with segment rotation");
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/* Change the angle/rotation of the first segment. */
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chart_set_rotation(chart, 90);
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/* Insert the chart into the worksheet. */
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worksheet_insert_chart(worksheet, CELL("D34"), chart);
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return workbook_close(workbook);
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}
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