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<?php |
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|
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/** @file |
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* This file is part of Google Chart PHP library. |
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* |
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* Copyright (c) 2010 Rémi Lanvin <remi@cloudconnected.fr> |
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* |
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* Licensed under the MIT license. |
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* |
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* For the full copyright and license information, please view the LICENSE file. |
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*/ |
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|
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require_once dirname(__FILE__).'/../GoogleChartMarker.php'; |
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|
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/** |
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* A Line marker. |
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* |
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* This class implement Line Markers feature (@c chm=D). |
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* |
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* @par Example |
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* @include marker_line.php |
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* |
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* @see GoogleChartMarker |
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* @see http://code.google.com/apis/chart/docs/chart_params.html#gcharts_line_markers |
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*/ |
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class GoogleChartLineMarker extends GoogleChartMarker |
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{ |
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/** |
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* @var string size parameter. |
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*/ |
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protected $size = '2'; |
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|
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/** |
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* @var array which_points parameter. |
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*/ |
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protected $points = null; |
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|
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/** |
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* Set the size of the line. |
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* |
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* @param $size (int) |
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* @return $this |
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*/ |
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public function setSize($size) |
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{ |
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$this->size = $size; |
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return $this; |
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} |
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|
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/** |
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* Set which points in the serie are used to draw the line. |
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* |
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* @param $start (int) (optional) at which point start |
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* @param $stop (int) (optional) at which point stop |
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* @return $this |
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*/ |
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public function setPoints($start = null, $stop = null) |
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{ |
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if ( $start === null && $stop === null ) { |
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$this->points = null; |
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} |
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else { |
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$this->points = array( |
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'start' => $start, |
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'stop' => $stop |
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); |
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} |
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return $this; |
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} |
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|
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/** |
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* Compute the parameter value. |
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* |
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* @note For internal use only. |
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* @param $index (int) index of the data serie. |
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* @return string |
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*/ |
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public function compute($index, $chart_type = null) |
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{ |
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if ( $index === null ) |
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throw new LogicException('Line marker requires one data serie.'); |
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|
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$points = 0; |
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if ( is_array($this->points) ) { |
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$points = $this->points['start'].':'.$this->points['stop']; |
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} |
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|
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$str = sprintf( |
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'D,%s,%d,%s,%d', |
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$this->color, |
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$index, |
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$points, |
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$this->size |
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); |
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|
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if ( $this->z_order !== null ) |
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$str .= ','.$this->z_order; |
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|
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return $str; |
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} |
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} |
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|
