SVGGraph options: data_label_tail_length

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Option name:

data_label_tail_length

Default value:

3

Added in version:

2.18

Data type:

number [?]

The datatypes used in this documentation for specifying SVGGraph options are described below. All options can be a literal value of the data type described, a variable containing the data type, or an expression that will produce the data type when evaluated (and they must always be valid PHP expressions).

array

An array, the number and data types of its members will depend on the option for which is it used.

boolean

A boolean TRUE or FALSE value, or any values that convert easily such as 1, "1", 0 and "".

callback

A callable function, which can be either the name of a function or an anonymous function itself.

colour

Any of the colour values supported by SVG inside a single or double quoted string. These include three and six digit hex codes, RGB and RGBA colours, and colour names. SVG uses "none" for no colour, which generally leaves things transparent.

fill

A colour value or one of the gradients and patterns supported by SVGGraph. See the SVGGraph colours page for details.

integer

A negative or positive whole number or 0.

measurement

An integer or float value, or a string containing a number followed by one of these CSS units: px, in, cm, mm, pt, pc.

number

Any number supported by PHP, for example 1 or -3.2 or 1.63e5 or M_PI.

string

Single or double quoted strings. Remember to double-quote your strings if you are inserting a line break:
"Line 1\nLine 2".

Per-dataset:

yes [?]

Per-dataset options allow specifying one option for all datasets or an array of options to be used for each dataset in turn. If there are more datasets than entries in the option array, the sequence will be repeated.

Example:

$settings['widget_taste'] = 'banana';
$settings['widget_colour'] = array(
  'red', 'green', 'blue'
);

For this example, the widgets for all datasets will taste of banana. The graph will use red widgets for dataset 0, green widgets for dataset 1 and blue widgets for dataset 2. Dataset 3 repeats the sequence so its widgets will be red, dataset 4 will have green widgets and dataset 5 will have blue widgets.

Structure:

yes [?]

Structure options may also be used as fields in the structure option's array to specify overriding settings for each data item. For more details and examples, visit the structured data page.

Example:

$settings['widget_grunge'] = 'very';
$settings['structure'] = array(
  'key' => 0, 'value' => 1,
  'widget_grunge' => 2
);

In this example widgets will be very grungy, except when a non-null item with the key 2 in the structured data array sets the grunginess to a different value.

Supported by:

ArrayGraph Bar3DGraph BarAndLineGraph BarGraph BoxAndWhiskerGraph BubbleGraph CandlestickGraph CylinderGraph Donut3DGraph DonutGraph EmptyGraph ExplodedDonut3DGraph ExplodedDonutGraph ExplodedPie3DGraph ExplodedPieGraph ExplodedSemiDonut3DGraph ExplodedSemiDonutGraph FloatingBarGraph GanttChart GroupedBar3DGraph GroupedBarGraph GroupedCylinderGraph Histogram HorizontalBar3DGraph HorizontalBarGraph HorizontalFloatingBarGraph HorizontalGroupedBar3DGraph HorizontalGroupedBarGraph HorizontalStackedBar3DGraph HorizontalStackedBarGraph LineGraph MultiLineGraph MultiRadarGraph MultiScatterGraph MultiSteppedLineGraph Pie3DGraph PieGraph PolarArea3DGraph PolarAreaGraph PopulationPyramid RadarGraph ScatterGraph SemiDonut3DGraph SemiDonutGraph StackedBar3DGraph StackedBarAndLineGraph StackedBarGraph StackedCylinderGraph StackedGroupedBar3DGraph StackedGroupedBarGraph StackedGroupedCylinderGraph StackedLineGraph SteppedLineGraph

Tags:

global label structure data-label

Length of data label tails.

This option sets the length of the tail line protruding from data labels that have tails. It does not change the position of the label, so a longer tail will overlap the data item to a greater extent. Use the data_label_space or data_label_position options to change the position of the label.

The default value for this option is 3 pixels, but the minimum length of the line style tail is set to the font size of the label. So if the data_label_font_size is 10 and data_label_tail_length is 5, the actual length of the tail will be 10 pixels. This is so that the tail does not look too much like a character, which I discovered during development when it looked like all my numbers had become negative.

Automatic tail length

From version 2.26, the tail length can be set to "auto", which makes the graph set a position for the end of the tail to point at instead of using a fixed length.

See also:

show_data_labels data_label_type data_label_tail_width data_label_space data_label_position

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