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<?php
/*
* Sparkline PHP Graphing Library
* Copyright 2004 James Byers <jbyers@gmail.com>
* http://sparkline.org
*
* Dual-licensed under the BSD (LICENSE-BSD.txt) and GPL (LICENSE-GPL.txt)
* licenses.
*
* $Id: Sparkline_Line.php,v 1.10 2008/03/11 19:12:49 jbyers Exp $
*
*/
require_once dirname(__FILE__).'/Sparkline.php';
class Sparkline_Line extends Sparkline {
var $dataSeries;
var $dataSeriesStats;
var $dataSeriesConverted;
var $yMin;
var $yMax;
var $featurePoint;
////////////////////////////////////////////////////////////////////////////
// constructor
//
function Sparkline_Line($catch_errors = true) {
parent::Sparkline($catch_errors);
$this->dataSeries = array();
$this->dataSeriesStats = array();
$this->dataSeriesConverted = array();
$this->featurePoint = array();
} // function Sparkline
////////////////////////////////////////////////////////////////////////////
// data setting
//
function SetData($x, $y, $series = 1) {
$x = trim($x);
$y = trim($y);
$this->Debug("Sparkline_Line :: SetData($x, $y, $series)", DEBUG_SET);
if (!is_numeric($x) ||
!is_numeric($y)) {
$this->Debug("Sparkline_Line :: SetData rejected values($x, $y) in series $series", DEBUG_WARNING);
return false;
} // if
$this->dataSeries[$series][$x] = $y;
if (!isset($this->dataSeriesStats[$series]['yMin']) ||
$y < $this->dataSeriesStats[$series]['yMin']) {
$this->dataSeriesStats[$series]['yMin'] = $y;
}
if (!isset($this->dataSeriesStats[$series]['xMin']) ||
$x < $this->dataSeriesStats[$series]['xMin']) {
$this->dataSeriesStats[$series]['xMin'] = $x;
}
if (!isset($this->dataSeriesStats[$series]['yMax']) ||
$y > $this->dataSeriesStats[$series]['yMax']) {
$this->dataSeriesStats[$series]['yMax'] = $y;
}
if (!isset($this->dataSeriesStats[$series]['xMax']) ||
$x > $this->dataSeriesStats[$series]['xMax']) {
$this->dataSeriesStats[$series]['xMax'] = $x;
}
} // function SetData
function SetYMin($value) {
$this->Debug("Sparkline_Line :: SetYMin($value)", DEBUG_SET);
$this->yMin = $value;
} // function SetYMin
function SetYMax($value) {
$this->Debug("Sparkline_Line :: SetYMax($value)", DEBUG_SET);
$this->yMax = $value;
} // function SetYMin
function ConvertDataSeries($series, $xBound, $yBound) {
$this->Debug("Sparkline_Line :: ConvertDataSeries($series, $xBound, $yBound)", DEBUG_CALLS);
if (!isset($this->yMin)) {
$this->yMin = $this->dataSeriesStats[$series]['yMin'];
}
if (!isset($this->xMin)) {
$this->xMin = $this->dataSeriesStats[$series]['XMin'];
}
if (!isset($this->yMax)) {
$this->yMax = $this->dataSeriesStats[$series]['yMax'] + ($this->yMin * -1);
}
if (!isset($this->xMax)) {
$this->xMax = $this->dataSeriesStats[$series]['xMax'];
}
for ($i = 0; $i < sizeof($this->dataSeries[$series]); $i++) {
$y = round(($this->dataSeries[$series][$i] + ($this->yMin * -1)) * ($yBound / $this->yMax));
$x = round($i * $xBound / (sizeof($this->dataSeries[$series]) ));
$this->dataSeriesConverted[$series][] = array($x, $y);
$this->Debug("Sparkline :: ConvertDataSeries series $series value $i ($x, $y)", DEBUG_SET);
}
} // function ConvertDataSeries
////////////////////////////////////////////////////////////////////////////
// features
//
function SetFeaturePoint($x, $y, $color, $diameter, $text = '', $position = TEXT_TOP, $font = FONT_1) {
$this->Debug("Sparkline_Line :: SetFeaturePoint($x, $y, '$color', $diameter, '$text')", DEBUG_CALLS);
$this->featurePoint[] = array('ptX' => $x,
'ptY' => $y,
'color' => $color,
'diameter' => $diameter,
'text' => $text,
'textpos' => $position,
'font' => $font);
} // function SetFeaturePoint
////////////////////////////////////////////////////////////////////////////
// low quality rendering
//
function Render($x, $y) {
$this->Debug("Sparkline_Line :: Render($x, $y)", DEBUG_CALLS);
if (!parent::Init($x, $y)) {
return false;
}
// convert based on graphAreaPx bounds
//
$this->ConvertDataSeries(1, $this->GetGraphWidth(), $this->GetGraphHeight());
// stats debugging
//
$this->Debug('Sparkline_Line :: Draw' .
' series: 1 min: ' . $this->dataSeriesStats[1]['yMin'] .
' max: ' . $this->dataSeriesStats[1]['yMax'] .
' offset: ' . ($this->dataSeriesStats[1]['yMin'] * -1) .
' height: ' . $this->GetGraphHeight() + 1 .
' yfactor: ' . ($this->GetGraphHeight() / ($this->dataSeriesStats[1]['yMax'] + ($this->dataSeriesStats[1]['yMin'] * -1))));
$this->Debug('Sparkline_Line :: Draw' .
' drawing area:' .
' (' . $this->graphAreaPx[0][0] . ',' . $this->graphAreaPx[0][1] . '), ' .
' (' . $this->graphAreaPx[1][0] . ',' . $this->graphAreaPx[1][1] . ')');
$this->DrawBackground();
// draw graph
//
for ($i = 0; $i < sizeof($this->dataSeriesConverted[1]) - 1; $i++) {
$this->DrawLine($this->dataSeriesConverted[1][$i][0] + $this->graphAreaPx[0][0],
$this->dataSeriesConverted[1][$i][1] + $this->graphAreaPx[0][1],
$this->dataSeriesConverted[1][$i+1][0] + $this->graphAreaPx[0][0],
$this->dataSeriesConverted[1][$i+1][1] + $this->graphAreaPx[0][1],
'black');
}
// draw features
//
while (list(, $v) = each($this->featurePoint)) {
$pxY = round(($v['ptY'] + ($this->yMin * -1)) * ($this->GetGraphHeight() / $this->yMax));
$pxX = round($v['ptX'] * $this->GetGraphWidth() / $this->dataSeriesStats[1]['xMax']);
$this->DrawCircleFilled($pxX + $this->graphAreaPx[0][0],
$pxY + $this->graphAreaPx[0][1],
$v['diameter'],
$v['color'],
$this->imageHandle);
$this->DrawTextRelative($v['text'],
$pxX + $this->graphAreaPx[0][0],
$pxY + $this->graphAreaPx[0][1],
$v['color'],
$v['textpos'],
round($v['diameter'] / 2),
$v['font'],
$this->imageHandle);
}
} // function Render
////////////////////////////////////////////////////////////////////////////
// high quality rendering
//
function RenderResampled($x, $y) {
$this->Debug("Sparkline_Line :: RenderResampled($x, $y)", DEBUG_CALLS);
if (!parent::Init($x, $y)) {
return false;
}
// draw background on standard image in case of resample blit miss
//
$this->DrawBackground($this->imageHandle);
// convert based on virtual canvas: x based on size of dataset, y scaled proportionately
// if size of data set is small, default to 4X target canvas size
//
$xVC = max(sizeof($this->dataSeries[1]), 4 * $x);
$yVC = floor($xVC * ($this->GetGraphHeight() / $this->GetGraphWidth()));
$this->ConvertDataSeries(1, $xVC, $yVC);
// stats debugging
//
$this->Debug('Sparkline_Line :: DrawResampled' .
' series: 1 min: ' . $this->dataSeriesStats[1]['yMin'] .
' max: ' . $this->dataSeriesStats[1]['yMax'] .
' offset: ' . ($this->dataSeriesStats[1]['yMin'] * -1) .
' height: ' . $this->GetGraphHeight() .
' yfactor: ' . ($this->GetGraphHeight() / ($this->dataSeriesStats[1]['yMax'] + ($this->dataSeriesStats[1]['yMin'] * -1))), DEBUG_STATS);
$this->Debug('Sparkline_Line :: DrawResampled' .
' drawing area:' .
' (' . $this->graphAreaPx[0][0] . ',' . $this->graphAreaPx[0][1] . '), ' .
' (' . $this->graphAreaPx[1][0] . ',' . $this->graphAreaPx[1][1] . ')');
// create virtual image
// allocate colors
// draw background, graph
// resample and blit onto original graph
//
$imageVCHandle = $this->CreateImageHandle($xVC, $yVC);
while (list($k, $v) = each($this->colorList)) {
$this->SetColorHandle($k, $this->DrawColorAllocate($k, $imageVCHandle));
}
reset($this->colorList);
$this->DrawBackground($imageVCHandle);
for ($i = 0; $i < sizeof($this->dataSeriesConverted[1]) - 1; $i++) {
$this->DrawLine($this->dataSeriesConverted[1][$i][0],
$this->dataSeriesConverted[1][$i][1],
$this->dataSeriesConverted[1][$i+1][0],
$this->dataSeriesConverted[1][$i+1][1],
'black',
$this->GetLineSize(),
$imageVCHandle);
}
$this->DrawImageCopyResampled($this->imageHandle,
$imageVCHandle,
$this->graphAreaPx[0][0], // dest x
$this->GetImageHeight() - $this->graphAreaPx[1][1], // dest y
0, 0, // src x, y
$this->GetGraphWidth(), // dest width
$this->GetGraphHeight(), // dest height
$xVC, // src width
$yVC); // src height
// draw features
//
while (list(, $v) = each($this->featurePoint)) {
$pxY = round(($v['ptY'] + ($this->yMin * -1)) * ($this->GetGraphHeight() / $this->yMax));
$pxX = round($v['ptX'] * $this->GetGraphWidth() / $this->dataSeriesStats[1]['xMax']);
$this->DrawCircleFilled($pxX + $this->graphAreaPx[0][0],
$pxY + $this->graphAreaPx[0][1],
$v['diameter'],
$v['color'],
$this->imageHandle);
$this->DrawTextRelative($v['text'],
$pxX + $this->graphAreaPx[0][0],
$pxY + $this->graphAreaPx[0][1],
$v['color'],
$v['textpos'],
round($v['diameter'] / 2),
$v['font'],
$this->imageHandle);
}
} // function RenderResampled
} // class Sparkline_Line
?>
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