mirror of
https://github.com/FH-Complete/FHC-Core.git
synced 2026-06-03 21:29:28 +00:00
Andreas Österreicher
653 lines
22 KiB
PHP
653 lines
22 KiB
PHP
<?php
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/**
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* File containing the ezcGraphLineChart class
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*
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* @package Graph
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* @version 1.3
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* @copyright Copyright (C) 2005-2008 eZ systems as. All rights reserved.
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* @license http://ez.no/licenses/new_bsd New BSD License
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*/
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/**
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* Class for line charts. Can make use of an unlimited amount of datasets and
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* will display them as lines by default.
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* X axis:
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* - Labeled axis
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* - Centered axis label renderer
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* Y axis:
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* - Numeric axis
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* - Exact axis label renderer
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*
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* <code>
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* // Create a new line chart
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* $chart = new ezcGraphLineChart();
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*
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* // Add data to line chart
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* $chart->data['sample dataset'] = new ezcGraphArrayDataSet(
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* array(
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* '100' => 1.2,
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* '200' => 43.2,
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* '300' => -34.14,
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* '350' => 65,
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* '400' => 123,
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* )
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* );
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*
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* // Render chart with default 2d renderer and default SVG driver
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* $chart->render( 500, 200, 'line_chart.svg' );
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* </code>
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*
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* Each chart consists of several chart elements which represents logical
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* parts of the chart and can be formatted independently. The line chart
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* consists of:
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* - title ( {@link ezcGraphChartElementText} )
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* - legend ( {@link ezcGraphChartElementLegend} )
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* - background ( {@link ezcGraphChartElementBackground} )
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* - xAxis ( {@link ezcGraphChartElementLabeledAxis} )
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* - yAxis ( {@link ezcGraphChartElementNumericAxis} )
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*
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* The type of the axis may be changed and all elements can be configured by
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* accessing them as properties of the chart:
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*
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* <code>
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* $chart->legend->position = ezcGraph::RIGHT;
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* </code>
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*
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* The chart itself also offers several options to configure the appearance.
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* The extended configure options are available in
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* {@link ezcGraphLineChartOptions} extending the {@link ezcGraphChartOptions}.
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*
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* @property ezcGraphLineChartOptions $options
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* Chart options class
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*
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* @version 1.3
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* @package Graph
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* @mainclass
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*/
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class ezcGraphLineChart extends ezcGraphChart
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{
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/**
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* Array with additional axis for the chart
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*
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* @var ezcGraphAxisContainer
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*/
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protected $additionalAxis;
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/**
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* Constructor
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*
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* @param array $options Default option array
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* @return void
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* @ignore
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*/
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public function __construct( array $options = array() )
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{
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$this->additionalAxis = new ezcGraphAxisContainer( $this );
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$this->options = new ezcGraphLineChartOptions( $options );
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$this->options->highlightFont = $this->options->font;
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parent::__construct();
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$this->addElement( 'xAxis', new ezcGraphChartElementLabeledAxis() );
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$this->elements['xAxis']->position = ezcGraph::LEFT;
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$this->addElement( 'yAxis', new ezcGraphChartElementNumericAxis() );
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$this->elements['yAxis']->position = ezcGraph::BOTTOM;
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}
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/**
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* __get
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*
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* @param mixed $propertyName
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* @throws ezcBasePropertyNotFoundException
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* If a the value for the property options is not an instance of
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* @return mixed
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* @ignore
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*/
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public function __get( $propertyName )
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{
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switch ( $propertyName )
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{
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case 'additionalAxis':
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return $this->additionalAxis;
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}
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return parent::__get( $propertyName );
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}
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/**
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* Options write access
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*
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* @throws ezcBasePropertyNotFoundException
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* If Option could not be found
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* @throws ezcBaseValueException
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* If value is out of range
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* @param mixed $propertyName Option name
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* @param mixed $propertyValue Option value;
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* @return mixed
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* @ignore
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*/
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public function __set( $propertyName, $propertyValue )
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{
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switch ( $propertyName ) {
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case 'xAxis':
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if ( $propertyValue instanceof ezcGraphChartElementAxis )
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{
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$this->addElement( 'xAxis', $propertyValue );
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$this->elements['xAxis']->position = ezcGraph::LEFT;
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}
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else
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{
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throw new ezcBaseValueException( $propertyName, $propertyValue, 'ezcGraphChartElementAxis' );
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}
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break;
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case 'yAxis':
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if ( $propertyValue instanceof ezcGraphChartElementAxis )
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{
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$this->addElement( 'yAxis', $propertyValue );
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$this->elements['yAxis']->position = ezcGraph::BOTTOM;
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}
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else
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{
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throw new ezcBaseValueException( $propertyName, $propertyValue, 'ezcGraphChartElementAxis' );
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}
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break;
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default:
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parent::__set( $propertyName, $propertyValue );
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}
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}
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/**
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* Set colors and border for this element
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*
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* @param ezcGraphPalette $palette Palette
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* @return void
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*/
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public function setFromPalette( ezcGraphPalette $palette )
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{
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foreach ( $this->additionalAxis as $element )
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{
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$element->setFromPalette( $palette );
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}
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parent::setFromPalette( $palette );
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}
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/**
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* Render the assigned data
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*
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* Will renderer all charts data in the remaining boundings after drawing
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* all other chart elements. The data will be rendered depending on the
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* settings in the dataset.
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*
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* @param ezcGraphRenderer $renderer Renderer
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* @param ezcGraphBoundings $boundings Remaining boundings
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* @return void
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*/
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protected function renderData( ezcGraphRenderer $renderer, ezcGraphBoundings $boundings )
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{
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// Apply axis space
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$xAxisSpace = ( $boundings->x1 - $boundings->x0 ) * $this->yAxis->axisSpace;
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$yAxisSpace = ( $boundings->y1 - $boundings->y0 ) * $this->xAxis->axisSpace;
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$boundings->x0 += $xAxisSpace;
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$boundings->x1 -= $xAxisSpace;
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$boundings->y0 += $yAxisSpace;
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$boundings->y1 -= $yAxisSpace;
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$yAxisNullPosition = $this->elements['yAxis']->getCoordinate( false );
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// Initialize counters
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$nr = array();
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$count = array();
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foreach ( $this->data as $data )
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{
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if ( !isset( $nr[$data->displayType->default] ) )
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{
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$nr[$data->displayType->default] = 0;
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$count[$data->displayType->default] = 0;
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}
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$nr[$data->displayType->default]++;
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$count[$data->displayType->default]++;
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}
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$checkedRegularSteps = false;
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// Display data
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foreach ( $this->data as $datasetName => $data )
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{
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--$nr[$data->displayType->default];
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// Check which axis should be used
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$xAxis = ( $data->xAxis->default ? $data->xAxis->default: $this->elements['xAxis'] );
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$yAxis = ( $data->yAxis->default ? $data->yAxis->default: $this->elements['yAxis'] );
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// Determine fill color for dataset
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if ( $this->options->fillLines !== false )
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{
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$fillColor = clone $data->color->default;
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$fillColor->alpha = (int) round( ( 255 - $fillColor->alpha ) * ( $this->options->fillLines / 255 ) );
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}
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else
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{
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$fillColor = null;
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}
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// Ensure regular steps on axis when used with bar charts and
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// precalculate some values use to render bar charts
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//
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// Called only once and only when bars should be rendered
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if ( ( $checkedRegularSteps === false ) &&
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( $data->displayType->default === ezcGraph::BAR ) )
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{
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$steps = $xAxis->getSteps();
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$stepWidth = null;
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foreach ( $steps as $step )
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{
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if ( $stepWidth === null )
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{
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$stepWidth = $step->width;
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}
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elseif ( $step->width !== $stepWidth )
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{
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throw new ezcGraphUnregularStepsException();
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}
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}
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$step = reset( $steps );
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if ( count( $step->childs ) )
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{
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// Keep this for BC reasons
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$barCount = ( $xAxis->getMajorStepCount() + 1 ) * ( $xAxis->getMinorStepCount() - 1 );
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$stepWidth = 1 / $barCount;
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}
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$checkedRegularSteps = true;
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$width = $xAxis->axisLabelRenderer->modifyChartDataPosition(
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$yAxis->axisLabelRenderer->modifyChartDataPosition(
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new ezcGraphCoordinate(
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( $boundings->x1 - $boundings->x0 ) * $stepWidth,
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0
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)
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)
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)->x;
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}
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// Draw lines for dataset
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$lastPoint = false;
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foreach ( $data as $key => $value )
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{
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// Calculate point in chart
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$point = $xAxis->axisLabelRenderer->modifyChartDataPosition(
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$yAxis->axisLabelRenderer->modifyChartDataPosition(
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new ezcGraphCoordinate(
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$xAxis->getCoordinate( $key ),
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$yAxis->getCoordinate( $value )
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)
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)
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);
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// Render depending on display type of dataset
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switch ( true )
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{
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case $data->displayType->default === ezcGraph::LINE:
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$renderer->drawDataLine(
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$boundings,
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new ezcGraphContext( $datasetName, $key, $data->url[$key] ),
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$data->color->default,
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( $lastPoint === false ? $point : $lastPoint ),
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$point,
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$nr[$data->displayType->default],
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$count[$data->displayType->default],
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$data->symbol[$key],
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$data->color[$key],
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$fillColor,
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$yAxisNullPosition,
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( $data->lineThickness->default ? $data->lineThickness->default : $this->options->lineThickness )
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);
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break;
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case ( $data->displayType->default === ezcGraph::BAR ) &&
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$this->options->stackBars :
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// Check if a bar has already been stacked
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if ( !isset( $stackedValue[(int) ( $point->x * 10000 )][(int) $value > 0] ) )
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{
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$start = new ezcGraphCoordinate(
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$point->x,
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$yAxisNullPosition
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);
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$stackedValue[(int) ( $point->x * 10000 )][(int) $value > 0] = $value;
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}
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else
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{
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$start = $xAxis->axisLabelRenderer->modifyChartDataPosition(
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$yAxis->axisLabelRenderer->modifyChartDataPosition(
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new ezcGraphCoordinate(
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$xAxis->getCoordinate( $key ),
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$yAxis->getCoordinate( $stackedValue[(int) ( $point->x * 10000 )][(int) $value > 0] )
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)
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)
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);
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$point = $xAxis->axisLabelRenderer->modifyChartDataPosition(
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$yAxis->axisLabelRenderer->modifyChartDataPosition(
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new ezcGraphCoordinate(
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$xAxis->getCoordinate( $key ),
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$yAxis->getCoordinate( $stackedValue[(int) ( $point->x * 10000 )][(int) $value > 0] += $value )
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)
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)
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);
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}
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// Force one symbol for each stacked bar
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if ( !isset( $stackedSymbol[(int) ( $point->x * 10000 )] ) )
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{
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$stackedSymbol[(int) ( $point->x * 10000 )] = $data->symbol[$key];
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}
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// Store stacked value for next iteration
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$stacked[(int) ( $point->x * 10000 )][$point->y / abs( $point->y )] = $point;
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$renderer->drawStackedBar(
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$boundings,
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new ezcGraphContext( $datasetName, $key, $data->url[$key] ),
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$data->color->default,
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$start,
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$point,
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$width,
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$stackedSymbol[(int) ( $point->x * 10000 )],
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$yAxisNullPosition
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);
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break;
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case $data->displayType->default === ezcGraph::BAR:
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$renderer->drawBar(
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$boundings,
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new ezcGraphContext( $datasetName, $key, $data->url[$key] ),
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$data->color[$key],
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$point,
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$width,
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$nr[$data->displayType->default],
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$count[$data->displayType->default],
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$data->symbol[$key],
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$yAxisNullPosition
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);
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break;
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default:
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throw new ezcGraphInvalidDisplayTypeException( $data->displayType->default );
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break;
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}
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// Render highlight string if requested
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if ( $data->highlight[$key] )
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{
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$renderer->drawDataHighlightText(
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$boundings,
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new ezcGraphContext( $datasetName, $key, $data->url[$key] ),
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$point,
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$yAxisNullPosition,
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$nr[$data->displayType->default],
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$count[$data->displayType->default],
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$this->options->highlightFont,
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( $data->highlightValue[$key] ? $data->highlightValue[$key] : $value ),
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$this->options->highlightSize + $this->options->highlightFont->padding * 2,
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( $this->options->highlightLines ? $data->color[$key] : null )
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);
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}
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// Store last point, used to connect lines in line chart.
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$lastPoint = $point;
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}
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}
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}
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/**
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* Returns the default display type of the current chart type.
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*
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* @return int Display type
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*/
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public function getDefaultDisplayType()
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{
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return ezcGraph::LINE;
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}
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/**
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* Check if renderer supports features requested by some special chart
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* options.
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*
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* @throws ezcBaseValueException
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* If some feature is not supported
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*
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* @return void
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*/
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protected function checkRenderer()
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{
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// When stacked bars are enabled, check if renderer supports them
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if ( $this->options->stackBars )
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{
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if ( !$this->renderer instanceof ezcGraphStackedBarsRenderer )
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{
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throw new ezcBaseValueException( 'renderer', $this->renderer, 'ezcGraphStackedBarsRenderer' );
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}
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}
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}
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/**
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* Aggregate and calculate value boundings on axis.
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*
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* @return void
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*/
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protected function setAxisValues()
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{
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// Virtual data set build for agrregated values sums for bar charts
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$virtualBarSumDataSet = array( array(), array() );
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// Calculate axis scaling and labeling
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foreach ( $this->data as $dataset )
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{
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$nr = 0;
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$labels = array();
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$values = array();
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foreach ( $dataset as $label => $value )
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{
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$labels[] = $label;
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$values[] = $value;
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// Build sum of all bars
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if ( $this->options->stackBars &&
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( $dataset->displayType->default === ezcGraph::BAR ) )
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{
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if ( !isset( $virtualBarSumDataSet[(int) $value >= 0][$nr] ) )
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{
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$virtualBarSumDataSet[(int) $value >= 0][$nr++] = $value;
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}
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else
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{
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$virtualBarSumDataSet[(int) $value >= 0][$nr++] += $value;
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}
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}
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}
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// Check if data has been associated with another custom axis, use
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// default axis otherwise.
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if ( $dataset->xAxis->default )
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{
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$dataset->xAxis->default->addData( $labels );
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}
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else
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{
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$this->elements['xAxis']->addData( $labels );
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}
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if ( $dataset->yAxis->default )
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{
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$dataset->yAxis->default->addData( $values );
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}
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else
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{
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$this->elements['yAxis']->addData( $values );
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}
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}
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// Also use stacked bar values as base for y axis value span
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// calculation
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if ( $this->options->stackBars )
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{
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$this->elements['yAxis']->addData( $virtualBarSumDataSet[0] );
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$this->elements['yAxis']->addData( $virtualBarSumDataSet[1] );
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}
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// There should always be something assigned to the main x and y axis.
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if ( !$this->elements['xAxis']->initialized ||
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!$this->elements['yAxis']->initialized )
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{
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throw new ezcGraphNoDataException();
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}
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// Calculate boundings from assigned data
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$this->elements['xAxis']->calculateAxisBoundings();
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$this->elements['yAxis']->calculateAxisBoundings();
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}
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/**
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* Renders the basic elements of this chart type
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*
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* @param int $width
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* @param int $height
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* @return void
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*/
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protected function renderElements( $width, $height )
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{
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if ( !count( $this->data ) )
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{
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throw new ezcGraphNoDataException();
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}
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// Check if renderer supports requested features
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$this->checkRenderer();
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// Set values form datasets on axis to calculate correct spans
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$this->setAxisValues();
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// Generate legend
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$this->elements['legend']->generateFromDataSets( $this->data );
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// Get boundings from parameters
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$this->options->width = $width;
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$this->options->height = $height;
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// Set image properties in driver
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$this->driver->options->width = $width;
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$this->driver->options->height = $height;
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// Render subelements
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$boundings = new ezcGraphBoundings();
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$boundings->x1 = $this->options->width;
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$boundings->y1 = $this->options->height;
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$boundings = $this->elements['xAxis']->axisLabelRenderer->modifyChartBoundings(
|
|
$this->elements['yAxis']->axisLabelRenderer->modifyChartBoundings(
|
|
$boundings, new ezcGraphCoordinate( 1, 0 )
|
|
), new ezcGraphCoordinate( -1, 0 )
|
|
);
|
|
|
|
// Render subelements
|
|
foreach ( $this->elements as $name => $element )
|
|
{
|
|
// Skip element, if it should not get rendered
|
|
if ( $this->renderElement[$name] === false )
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// Special settings for special elements
|
|
switch ( $name )
|
|
{
|
|
case 'xAxis':
|
|
// get Position of 0 on the Y-axis for orientation of the x-axis
|
|
$element->nullPosition = $this->elements['yAxis']->getCoordinate( false );
|
|
break;
|
|
case 'yAxis':
|
|
// get Position of 0 on the X-axis for orientation of the y-axis
|
|
$element->nullPosition = $this->elements['xAxis']->getCoordinate( false );
|
|
break;
|
|
}
|
|
|
|
$this->driver->options->font = $element->font;
|
|
$boundings = $element->render( $this->renderer, $boundings );
|
|
}
|
|
|
|
// Render additional axis
|
|
foreach ( $this->additionalAxis as $element )
|
|
{
|
|
if ( $element->initialized )
|
|
{
|
|
// Calculate all required step sizes if values has been
|
|
// assigned to axis.
|
|
$element->calculateAxisBoundings();
|
|
}
|
|
else
|
|
{
|
|
// Do not render any axis labels, if no values were assigned
|
|
// and no step sizes were defined.
|
|
$element->axisLabelRenderer = new ezcGraphAxisNoLabelRenderer();
|
|
}
|
|
|
|
$this->driver->options->font = $element->font;
|
|
$element->nullPosition = $element->chartPosition;
|
|
$boundings = $element->render( $this->renderer, $boundings );
|
|
}
|
|
|
|
// Render graph
|
|
$this->renderData( $this->renderer, $boundings );
|
|
}
|
|
|
|
/**
|
|
* Render the line chart
|
|
*
|
|
* Renders the chart into a file or stream. The width and height are
|
|
* needed to specify the dimensions of the resulting image. For direct
|
|
* output use 'php://stdout' as output file.
|
|
*
|
|
* @param int $width Image width
|
|
* @param int $height Image height
|
|
* @param string $file Output file
|
|
* @apichange
|
|
* @return void
|
|
*/
|
|
public function render( $width, $height, $file = null )
|
|
{
|
|
$this->renderElements( $width, $height );
|
|
|
|
if ( !empty( $file ) )
|
|
{
|
|
$this->renderer->render( $file );
|
|
}
|
|
|
|
$this->renderedFile = $file;
|
|
}
|
|
|
|
/**
|
|
* Renders this chart to direct output
|
|
*
|
|
* Does the same as ezcGraphChart::render(), but renders directly to
|
|
* output and not into a file.
|
|
*
|
|
* @param int $width
|
|
* @param int $height
|
|
* @apichange
|
|
* @return void
|
|
*/
|
|
public function renderToOutput( $width, $height )
|
|
{
|
|
// @TODO: merge this function with render an deprecate ommit of third
|
|
// argument in render() when API break is possible
|
|
$this->renderElements( $width, $height );
|
|
$this->renderer->render( null );
|
|
}
|
|
}
|
|
?>
|