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<?php
/**
* File containing the abstract ezcGraph class
*
* @package Graph
* @version //autogentag//
* @copyright Copyright (C) 2005-2008 eZ systems as. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
*/
/**
* Toolkit for several operation with graphs
*
* @version //autogentag//
* @package Graph
* @mainclass
*/
class ezcGraphTools
{
/**
* Create an XHtml image map from a chart with gd driver. The name of the
* image map can be specified and will be ezcGraphImageMap otherwise.
*
* @param ezcGraphChart $chart
* @param string $name
* @return string
*/
public static function createImageMap( ezcGraphChart $chart, $name = null )
{
if ( $name === null )
{
$name = 'ezcGraphImageMap';
}
if ( ! ( $chart->driver instanceof ezcGraphGdDriver ) )
{
throw new ezcGraphToolsIncompatibleDriverException( $chart->driver, 'ezcGraphGdDriver' );
}
$elements = $chart->renderer->getElementReferences();
if ( !count( $elements ) )
{
throw new ezcGraphToolsNotRenderedException( $chart );
}
$imageMap = sprintf( "<map name=\"%s\">\n", $name );
// Iterate over legends elements
if ( isset( $elements['legend'] ) )
{
foreach ( $elements['legend'] as $objectName => $polygones )
{
$url = $elements['legend_url'][$objectName];
if ( empty( $url ) )
{
continue;
}
foreach ( $polygones as $shape => $polygone )
{
$coordinateString = '';
foreach ( $polygone as $coordinate )
{
$coordinateString .= sprintf( '%d,%d,', $coordinate->x, $coordinate->y );
}
$imageMap .= sprintf( "\t<area shape=\"poly\" coords=\"%s\" href=\"%s\" alt=\"%s\" />\n",
substr( $coordinateString, 0, -1 ),
$url,
$objectName
);
}
}
}
// Iterate over data
foreach ( $elements['data'] as $dataset => $datapoints )
{
foreach ( $datapoints as $datapoint => $polygones )
{
$url = $chart->data[$dataset]->url[$datapoint];
if ( empty( $url ) )
{
continue;
}
foreach ( $polygones as $polygon )
{
$coordinateString = '';
foreach ( $polygon as $coordinate )
{
$coordinateString .= sprintf( '%d,%d,', $coordinate->x, $coordinate->y );
}
$imageMap .= sprintf( "\t<area shape=\"poly\" coords=\"%s\" href=\"%s\" alt=\"%s\" />\n",
substr( $coordinateString, 0, -1 ),
$url,
$datapoint
);
}
}
}
return $imageMap . "</map>\n";
}
/**
* Add links to clickable SVG elements in a chart with SVG driver.
*
* @param ezcGraphChart $chart
* @return void
*/
public static function linkSvgElements( ezcGraphChart $chart )
{
if ( ! ( $chart->driver instanceof ezcGraphSvgDriver ) )
{
throw new ezcGraphToolsIncompatibleDriverException( $chart->driver, 'ezcGraphSvgDriver' );
}
$fileName = $chart->getRenderedFile();
if ( !$fileName )
{
throw new ezcGraphToolsNotRenderedException( $chart );
}
$dom = new DOMDocument();
$dom->load( $fileName );
$xpath = new DomXPath( $dom );
$elements = $chart->renderer->getElementReferences();
// Link chart elements
foreach ( $elements['data'] as $dataset => $datapoints )
{
foreach ( $datapoints as $datapoint => $ids )
{
$url = $chart->data[$dataset]->url[$datapoint];
if ( empty( $url ) )
{
continue;
}
foreach ( $ids as $id )
{
$element = $xpath->query( '//*[@id = \'' . $id . '\']' )->item( 0 );
$element->setAttribute( 'style', $element->getAttribute( 'style' ) . ' cursor: ' . $chart->driver->options->linkCursor . ';' );
$element->setAttribute( 'onclick', "top.location = '{$url}'" );
}
}
}
// Link legend elements
if ( isset( $elements['legend'] ) )
{
foreach ( $elements['legend'] as $objectName => $ids )
{
$url = $elements['legend_url'][$objectName];
if ( empty( $url ) )
{
continue;
}
foreach ( $ids as $id )
{
$element = $xpath->query( '//*[@id = \'' . $id . '\']' )->item( 0 );
$element->setAttribute( 'style', $element->getAttribute( 'style' ) . ' cursor: ' . $chart->driver->options->linkCursor . ';' );
$element->setAttribute( 'onclick', "top.location = '{$url}'" );
}
}
}
$dom->save( $fileName );
}
}
?>
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