PHPGraphLibPie is an extension of the original PHPGraphLib
that allows you to make pie charts using the existing PHPGraphLib
framework. For an example of setup and usage, see
Tutorial #3: PHPGraphLibPie Extension - Creating
a Pie Chart.
PHPGraphLibPie inherits many of the same functions as PHPGraphLib.
There is a list of inherited functions at the bottom of this
page.
Anatomy of a PHPGraphLibPie Chart
Below is the default form of the constructor:
| Constructor& Example Usage |
Description |
PHPGraphLibPie( int $width, int $height )
- $graph=new PHPGraphLibPie(600,400);
|
PHPGraphLibPie object constructor. $width and $height
arguments are optional. Default width=400, height=300. |
Functions Specific to PHPGraphLibPie:
| Function Names & Example Usage |
Description |
setDataLabels( boolean $labels )
- $graph->setDataLabels(false);
|
Display % data labels by each section of the
pie/ Accepts either true or false arguments. Default value
is true, data labels are displayed. |
setPrecision( int $digits )
|
Sets the number of significant digits to be
displayed on the graph if the setDataLabels() function is
true. Default is 0 significant digits, meaning that hey
data labels are whole numbers. |
setLabelTextColor( string $title )
- $graph->setLabelTextColor("maroon");
- $graph->setLabelTextColor("0,0,200");
|
Sets the text color of the display % labels
on the pie chart. Color may be specified as one of the supported
colors or as an RGB value comma separated string. Default
color is a black. |
PHPGraphLibPie also inherits some functions from the PHPGraphLib
class. These functions are:
- addData()
- createGraph()
- setBackgroundColor()
- setTitle()
- setTitleColor()
As of PHPGraphLib 2.0, PHPGraphLibPie also inherits the following
functions that used to be just included in PHPGraphLibPie.
- setLegend()
- setLegendColor()
- setLegendTextColor()
- setLegendOutlineColor()
- setSwatchOutlineColor()
For usage, please refer to the main PHPGraphLib
Function Reference.
 Supported
Colors
In addition to supporting all the colors built into PHPGraphLib,
PHPGraphLibPie also supports the following colors in name:
- pastel_orange_1
- pastel_orange_2
- pastel_blue_1
- pastel_blue_2
- pastel_green_1
- pastel_green_2
- clay
- pastel_yellow
- pastel_purple
- brown
The colors used in the pie slices are automatically drawn from
a list that includes these colors. Lighter pastel colors, are
easier on the eyes when used in a pie chart situation. |
PHPGraphLib