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Added support for chart line smoothing.

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This commit is contained in:
John McNamara 2017-01-16 01:10:40 +00:00
parent fb9190f360
commit a128d70074
14 changed files with 283 additions and 9 deletions
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34
src/chart.c
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@ -2070,14 +2070,16 @@ _chart_write_marker_value(lxw_chart *self)
* Write the <c:smooth> element.
*/
STATIC void
_chart_write_smooth(lxw_chart *self)
_chart_write_smooth(lxw_chart *self, uint8_t smooth)
{
struct xml_attribute_list attributes;
struct xml_attribute *attribute;
char val[] = "1";
if (!smooth)
return;
LXW_INIT_ATTRIBUTES();
LXW_PUSH_ATTRIBUTES_STR("val", val);
LXW_PUSH_ATTRIBUTES_STR("val", "1");
lxw_xml_empty_tag(self->file, "c:smooth", &attributes);
@ -2211,6 +2213,10 @@ _chart_write_ser(lxw_chart *self, lxw_chart_series *series)
/* Write the c:val element. */
_chart_write_val(self, series);
/* Write the c:smooth element. */
if (self->is_scatter_chart || self->type == LXW_CHART_LINE)
_chart_write_smooth(self, series->smooth);
lxw_xml_end_tag(self->file, "c:ser");
}
@ -2249,11 +2255,8 @@ _chart_write_xval_ser(lxw_chart *self, lxw_chart_series *series)
/* Write the yVal element. */
_chart_write_y_val(self, series);
if (self->type == LXW_CHART_SCATTER_SMOOTH
|| self->type == LXW_CHART_SCATTER_SMOOTH_WITH_MARKERS) {
/* Write the c:smooth element. */
_chart_write_smooth(self);
}
/* Write the c:smooth element. */
_chart_write_smooth(self, series->smooth);
lxw_xml_end_tag(self->file, "c:ser");
}
@ -4000,6 +4003,12 @@ chart_add_series(lxw_chart *self, const char *categories, const char *values)
if (_chart_init_data_cache(series->title.range) != LXW_NO_ERROR)
goto mem_error;
if (self->type == LXW_CHART_SCATTER_SMOOTH)
series->smooth = LXW_TRUE;
if (self->type == LXW_CHART_SCATTER_SMOOTH_WITH_MARKERS)
series->smooth = LXW_TRUE;
STAILQ_INSERT_TAIL(self->series_list, series, list_pointers);
return series;
@ -4272,6 +4281,15 @@ chart_series_set_points(lxw_chart_series *series, lxw_chart_point *points[])
return LXW_NO_ERROR;
}
/*
* Set the smooth property for a line or scatter series.
*/
void
chart_series_set_smooth(lxw_chart_series *series, uint8_t smooth)
{
series->smooth = smooth;
}
/*
* Set an axis caption.
*/