Layer.addCustomDataLabel

TextBox *addCustomDataLabel(int dataSet, int dataItem, const char *label, const char *font = 0, double fontSize = 8, int fontColor = TextColor, double fontAngle = 0);

Adds a custom data label to a data point.

Data labels are text used label data points in the layer. Please refer to Layer.setDataLabelStyle for a more detail description.

See Font Specification for details on various font attributes.

Argument	Default	Description
dataSet	(Mandatory)	The data set index of the data point. The first data set is 0; the nth data set is (n - 1).
dataItem	(Mandatory)	The data point index of the data point. The first data point is 0; the nth data point is (n - 1).
label	(Mandatory)	A text string representing the data label. Parameter Substitution and Formatting is supported.
font	""	The font used to draw the label.
fontSize	8	The font size used to draw the label.
fontColor	TextColor	The color used to draw the label.
fontAngle	0	The rotation angle of the label.

A TextBox object representing the prototype of the custom data label. This may be used to fine-tune the appearance of the custom data label.