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<?php
/** @file
* This file is part of Google Chart PHP library.
*
* Copyright (c) 2010 Rémi Lanvin <remi@cloudconnected.fr>
*
* Licensed under the MIT license.
*
* For the full copyright and license information, please view the LICENSE file.
*/
/**
* A Marker.
*
* This in an abstract class that is used by all the Markers type.
*
* Marker implementation in Google Chart API is quite complex. There are many types
* of markers (value, line, shape, candlestick and range) and each has a
* different set of parameter and a slightly different logic. So each type has
* its own class, that extends GoogleChartMarker.
*
* To display a marker, you need to set a data serie using setData() function.
* A data serie is a GoogleChartData object. It contains points used by the
* marker. You can provides an existing data serie (i.e. a data serie that has been
* or will be added to the chart with GoogleChart::addData()) or a new data serie.
* In this case, the data serie will be hidden. Please refer to Google Chart API
* documentation about compound chart for further information.
*/
abstract class GoogleChartMarker
{
/**
* @var GoogleChartData Will hold the data serie.
*/
protected $data = null;
/**
* @name Common parameters to every markers
*/
//@{
/**
* @var string Color of the marker
*/
protected $color = '4D89F9';
/**
* @var float Z-order of the marker
*/
protected $z_order = null;
//@}
/**
* Set the color of the marker.
*
* @param $color (string)
*/
public function setColor($color)
{
$this->color = $color;
return $this;
}
/**
* Return the color.
*
* @return string
*/
public function getColor()
{
return $this->color;
}
public function setZOrder($z_order)
{
if ( $z_order < -1 || $z_order > 1 )
throw new InvalidArgumentException('Invalid Z-order (must be between -1.0 and 1.0)');
$this->z_order = $z_order;
return $this;
}
public function getZOrder($z_order)
{
return $this->z_order;
}
public function setData(GoogleChartData $data)
{
$this->data = $data;
return $this;
}
public function getData()
{
return $this->data;
}
abstract public function compute($index, $chart_type = null);
}