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<?php
/*=======================================================================
// File: JPGRAPH_LINE.PHP
// Description: Line plot extension for JpGraph
// Created: 2001-01-08
// Author: Johan Persson (johanp@aditus.nu)
// Ver: $Id: jpgraph_line.php 72 2005-06-22 21:28:32Z ljp $
//
// Copyright (c) Aditus Consulting. All rights reserved.
//========================================================================
*/
require_once ('jpgraph_plotmark.inc');
// constants for the (filled) area
DEFINE("LP_AREA_FILLED", true);
DEFINE("LP_AREA_NOT_FILLED", false);
DEFINE("LP_AREA_BORDER",false);
DEFINE("LP_AREA_NO_BORDER",true);
//===================================================
// CLASS LinePlot
// Description:
//===================================================
class LinePlot extends Plot{
var $filled=false;
var $fill_color='blue';
var $mark=null;
var $step_style=false, $center=false;
var $line_style=1; // Default to solid
var $filledAreas = array(); // array of arrays(with min,max,col,filled in them)
var $barcenter=false; // When we mix line and bar. Should we center the line in the bar.
var $fillFromMin = false ;
var $fillgrad=false,$fillgrad_fromcolor='navy',$fillgrad_tocolor='silver',$fillgrad_numcolors=100;
var $iFastStroke=false;
//---------------
// CONSTRUCTOR
function LinePlot(&$datay,$datax=false) {
$this->Plot($datay,$datax);
$this->mark = new PlotMark();
}
//---------------
// PUBLIC METHODS
// Set style, filled or open
function SetFilled($aFlag=true) {
JpGraphError::Raise('LinePlot::SetFilled() is deprecated. Use SetFillColor()');
}
function SetBarCenter($aFlag=true) {
$this->barcenter=$aFlag;
}
function SetStyle($aStyle) {
$this->line_style=$aStyle;
}
function SetStepStyle($aFlag=true) {
$this->step_style = $aFlag;
}
function SetColor($aColor) {
parent::SetColor($aColor);
}
function SetFillFromYMin($f=true) {
$this->fillFromMin = $f ;
}
function SetFillColor($aColor,$aFilled=true) {
$this->fill_color=$aColor;
$this->filled=$aFilled;
}
function SetFillGradient($aFromColor,$aToColor,$aNumColors=100,$aFilled=true) {
$this->fillgrad_fromcolor = $aFromColor;
$this->fillgrad_tocolor = $aToColor;
$this->fillgrad_numcolors = $aNumColors;
$this->filled = $aFilled;
$this->fillgrad = true;
}
function Legend(&$graph) {
if( $this->legend!="" ) {
if( $this->filled ) {
$graph->legend->Add($this->legend,
$this->fill_color,$this->mark,0,
$this->legendcsimtarget,$this->legendcsimalt);
} else {
$graph->legend->Add($this->legend,
$this->color,$this->mark,$this->line_style,
$this->legendcsimtarget,$this->legendcsimalt);
}
}
}
function AddArea($aMin=0,$aMax=0,$aFilled=LP_AREA_NOT_FILLED,$aColor="gray9",$aBorder=LP_AREA_BORDER) {
if($aMin > $aMax) {
// swap
$tmp = $aMin;
$aMin = $aMax;
$aMax = $tmp;
}
$this->filledAreas[] = array($aMin,$aMax,$aColor,$aFilled,$aBorder);
}
// Gets called before any axis are stroked
function PreStrokeAdjust(&$graph) {
// If another plot type have already adjusted the
// offset we don't touch it.
// (We check for empty in case the scale is a log scale
// and hence doesn't contain any xlabel_offset)
if( empty($graph->xaxis->scale->ticks->xlabel_offset) ||
$graph->xaxis->scale->ticks->xlabel_offset == 0 ) {
if( $this->center ) {
++$this->numpoints;
$a=0.5; $b=0.5;
} else {
$a=0; $b=0;
}
$graph->xaxis->scale->ticks->SetXLabelOffset($a);
$graph->SetTextScaleOff($b);
//$graph->xaxis->scale->ticks->SupressMinorTickMarks();
}
}
function SetFastStroke($aFlg=true) {
$this->iFastStroke = $aFlg;
}
function FastStroke(&$img,&$xscale,&$yscale,$aStartPoint=0,$exist_x=true) {
// An optimized stroke for many data points with no extra
// features but 60% faster. You can't have values or line styles, or null
// values in plots.
$numpoints=count($this->coords[0]);
if( $this->barcenter )
$textadj = 0.5-$xscale->text_scale_off;
else
$textadj = 0;
$img->SetColor($this->color);
$img->SetLineWeight($this->weight);
$pnts=$aStartPoint;
while( $pnts < $numpoints ) {
if( $exist_x ) $x=$this->coords[1][$pnts];
else $x=$pnts+$textadj;
$xt = $xscale->Translate($x);
$y=$this->coords[0][$pnts];
$yt = $yscale->Translate($y);
if( is_numeric($y) ) {
$cord[] = $xt;
$cord[] = $yt;
}
elseif( $y == '-' && $pnts > 0 ) {
// Just ignore
}
else {
JpGraphError::Raise('Plot too complicated for fast line Stroke. Use standard Stroke()');
return;
}
++$pnts;
} // WHILE
$img->Polygon($cord,false,true);
}
function Stroke(&$img,&$xscale,&$yscale) {
$numpoints=count($this->coords[0]);
if( isset($this->coords[1]) ) {
if( count($this->coords[1])!=$numpoints )
JpGraphError::Raise("Number of X and Y points are not equal. Number of X-points:".count($this->coords[1])." Number of Y-points:$numpoints");
else
$exist_x = true;
}
else
$exist_x = false;
if( $this->barcenter )
$textadj = 0.5-$xscale->text_scale_off;
else
$textadj = 0;
// Find the first numeric data point
$startpoint=0;
while( $startpoint < $numpoints && !is_numeric($this->coords[0][$startpoint]) )
++$startpoint;
// Bail out if no data points
if( $startpoint == $numpoints )
return;
if( $this->iFastStroke ) {
$this->FastStroke($img,$xscale,$yscale,$startpoint,$exist_x);
return;
}
if( $exist_x )
$xs=$this->coords[1][$startpoint];
else
$xs= $textadj+$startpoint;
$img->SetStartPoint($xscale->Translate($xs),
$yscale->Translate($this->coords[0][$startpoint]));
if( $this->filled ) {
$cord[] = $xscale->Translate($xs);
$min = $yscale->GetMinVal();
if( $min > 0 || $this->fillFromMin )
$cord[] = $yscale->Translate($min);
else
$cord[] = $yscale->Translate(0);
}
$xt = $xscale->Translate($xs);
$yt = $yscale->Translate($this->coords[0][$startpoint]);
$cord[] = $xt;
$cord[] = $yt;
$yt_old = $yt;
$xt_old = $xt;
$y_old = $this->coords[0][$startpoint];
$this->value->Stroke($img,$this->coords[0][$startpoint],$xt,$yt);
$img->SetColor($this->color);
$img->SetLineWeight($this->weight);
$img->SetLineStyle($this->line_style);
$pnts=$startpoint+1;
$firstnonumeric = false;
while( $pnts < $numpoints ) {
if( $exist_x ) $x=$this->coords[1][$pnts];
else $x=$pnts+$textadj;
$xt = $xscale->Translate($x);
$yt = $yscale->Translate($this->coords[0][$pnts]);
$y=$this->coords[0][$pnts];
if( $this->step_style ) {
// To handle null values within step style we need to record the
// first non numeric value so we know from where to start if the
// non value is '-'.
if( is_numeric($y) ) {
$firstnonumeric = false;
if( is_numeric($y_old) ) {
$img->StyleLine($xt_old,$yt_old,$xt,$yt_old);
$img->StyleLine($xt,$yt_old,$xt,$yt);
}
elseif( $y_old == '-' ) {
$img->StyleLine($xt_first,$yt_first,$xt,$yt_first);
$img->StyleLine($xt,$yt_first,$xt,$yt);
}
else {
$yt_old = $yt;
$xt_old = $xt;
}
$cord[] = $xt;
$cord[] = $yt_old;
$cord[] = $xt;
$cord[] = $yt;
}
elseif( $firstnonumeric==false ) {
$firstnonumeric = true;
$yt_first = $yt_old;
$xt_first = $xt_old;
}
}
else {
if( is_numeric($y) || (is_string($y) && $y != "-") ) {
$tmp1=$this->coords[0][$pnts];
$tmp2=$this->coords[0][$pnts-1];
if( is_numeric($tmp1) && (is_numeric($tmp2) || $tmp2=="-" ) ) {
$img->StyleLineTo($xt,$yt);
}
else {
$img->SetStartPoint($xt,$yt);
}
if( is_numeric($tmp1) &&
(is_numeric($tmp2) || $tmp2=="-" || ($this->filled && $tmp2=='') ) ) {
$cord[] = $xt;
$cord[] = $yt;
}
}
}
$yt_old = $yt;
$xt_old = $xt;
$y_old = $y;
$this->StrokeDataValue($img,$this->coords[0][$pnts],$xt,$yt);
++$pnts;
}
if( $this->filled ) {
$cord[] = $xt;
if( $min > 0 || $this->fillFromMin )
$cord[] = $yscale->Translate($min);
else
$cord[] = $yscale->Translate(0);
if( $this->fillgrad ) {
$img->SetLineWeight(1);
$grad = new Gradient($img);
$grad->SetNumColors($this->fillgrad_numcolors);
$grad->FilledFlatPolygon($cord,$this->fillgrad_fromcolor,$this->fillgrad_tocolor);
$img->SetLineWeight($this->weight);
}
else {
$img->SetColor($this->fill_color);
$img->FilledPolygon($cord);
}
if( $this->line_weight > 0 ) {
$img->SetColor($this->color);
$img->Polygon($cord);
}
}
if(!empty($this->filledAreas)) {
$minY = $yscale->Translate($yscale->GetMinVal());
$factor = ($this->step_style ? 4 : 2);
for($i = 0; $i < sizeof($this->filledAreas); ++$i) {
// go through all filled area elements ordered by insertion
// fill polygon array
$areaCoords[] = $cord[$this->filledAreas[$i][0] * $factor];
$areaCoords[] = $minY;
$areaCoords =
array_merge($areaCoords,
array_slice($cord,
$this->filledAreas[$i][0] * $factor,
($this->filledAreas[$i][1] - $this->filledAreas[$i][0] + ($this->step_style ? 0 : 1)) * $factor));
$areaCoords[] = $areaCoords[sizeof($areaCoords)-2]; // last x
$areaCoords[] = $minY; // last y
if($this->filledAreas[$i][3]) {
$img->SetColor($this->filledAreas[$i][2]);
$img->FilledPolygon($areaCoords);
$img->SetColor($this->color);
}
// Check if we should draw the frame.
// If not we still re-draw the line since it might have been
// partially overwritten by the filled area and it doesn't look
// very good.
// TODO: The behaviour is undefined if the line does not have
// any line at the position of the area.
if( $this->filledAreas[$i][4] )
$img->Polygon($areaCoords);
else
$img->Polygon($cord);
$areaCoords = array();
}
}
if( $this->mark->type == -1 || $this->mark->show == false )
return;
for( $pnts=0; $pnts<$numpoints; ++$pnts) {
if( $exist_x ) $x=$this->coords[1][$pnts];
else $x=$pnts+$textadj;
$xt = $xscale->Translate($x);
$yt = $yscale->Translate($this->coords[0][$pnts]);
if( is_numeric($this->coords[0][$pnts]) ) {
if( !empty($this->csimtargets[$pnts]) ) {
$this->mark->SetCSIMTarget($this->csimtargets[$pnts]);
$this->mark->SetCSIMAlt($this->csimalts[$pnts]);
}
if( $exist_x )
$x=$this->coords[1][$pnts];
else
$x=$pnts;
$this->mark->SetCSIMAltVal($this->coords[0][$pnts],$x);
$this->mark->Stroke($img,$xt,$yt);
$this->csimareas .= $this->mark->GetCSIMAreas();
$this->StrokeDataValue($img,$this->coords[0][$pnts],$xt,$yt);
}
}
}
} // Class
//===================================================
// CLASS AccLinePlot
// Description:
//===================================================
class AccLinePlot extends Plot {
var $plots=null,$nbrplots=0,$numpoints=0;
var $iStartEndZero=true;
//---------------
// CONSTRUCTOR
function AccLinePlot($plots) {
$this->plots = $plots;
$this->nbrplots = count($plots);
$this->numpoints = $plots[0]->numpoints;
for($i=0; $i < $this->nbrplots; ++$i ) {
$this->LineInterpolate($this->plots[$i]->coords[0]);
}
}
//---------------
// PUBLIC METHODS
function Legend(&$graph) {
foreach( $this->plots as $p )
$p->DoLegend($graph);
}
function Max() {
list($xmax) = $this->plots[0]->Max();
$nmax=0;
for($i=0; $i<count($this->plots); ++$i) {
$n = count($this->plots[$i]->coords[0]);
$nmax = max($nmax,$n);
list($x) = $this->plots[$i]->Max();
$xmax = Max($xmax,$x);
}
for( $i = 0; $i < $nmax; $i++ ) {
// Get y-value for line $i by adding the
// individual bars from all the plots added.
// It would be wrong to just add the
// individual plots max y-value since that
// would in most cases give to large y-value.
$y=$this->plots[0]->coords[0][$i];
for( $j = 1; $j < $this->nbrplots; $j++ ) {
$y += $this->plots[ $j ]->coords[0][$i];
}
$ymax[$i] = $y;
}
$ymax = max($ymax);
return array($xmax,$ymax);
}
function Min() {
$nmax=0;
list($xmin,$ysetmin) = $this->plots[0]->Min();
for($i=0; $i<count($this->plots); ++$i) {
$n = count($this->plots[$i]->coords[0]);
$nmax = max($nmax,$n);
list($x,$y) = $this->plots[$i]->Min();
$xmin = Min($xmin,$x);
$ysetmin = Min($y,$ysetmin);
}
for( $i = 0; $i < $nmax; $i++ ) {
// Get y-value for line $i by adding the
// individual bars from all the plots added.
// It would be wrong to just add the
// individual plots min y-value since that
// would in most cases give to small y-value.
$y=$this->plots[0]->coords[0][$i];
for( $j = 1; $j < $this->nbrplots; $j++ ) {
$y += $this->plots[ $j ]->coords[0][$i];
}
$ymin[$i] = $y;
}
$ymin = Min($ysetmin,Min($ymin));
return array($xmin,$ymin);
}
// Gets called before any axis are stroked
function PreStrokeAdjust(&$graph) {
// If another plot type have already adjusted the
// offset we don't touch it.
// (We check for empty in case the scale is a log scale
// and hence doesn't contain any xlabel_offset)
if( empty($graph->xaxis->scale->ticks->xlabel_offset) ||
$graph->xaxis->scale->ticks->xlabel_offset == 0 ) {
if( $this->center ) {
++$this->numpoints;
$a=0.5; $b=0.5;
} else {
$a=0; $b=0;
}
$graph->xaxis->scale->ticks->SetXLabelOffset($a);
$graph->SetTextScaleOff($b);
$graph->xaxis->scale->ticks->SupressMinorTickMarks();
}
}
function SetInterpolateMode($aIntMode) {
$this->iStartEndZero=$aIntMode;
}
// Replace all '-' with an interpolated value. We use straightforward
// linear interpolation. If the data starts with one or several '-' they
// will be replaced by the the first valid data point
function LineInterpolate(&$aData) {
$n=count($aData);
$i=0;
// If first point is undefined we will set it to the same as the first
// valid data
if( $aData[$i]==='-' ) {
// Find the first valid data
while( $i < $n && $aData[$i]==='-' ) {
++$i;
}
if( $i < $n ) {
for($j=0; $j < $i; ++$j ) {
if( $this->iStartEndZero )
$aData[$i] = 0;
else
$aData[$j] = $aData[$i];
}
}
else {
// All '-' => Error
return false;
}
}
while($i < $n) {
while( $i < $n && $aData[$i] !== '-' ) {
++$i;
}
if( $i < $n ) {
$pstart=$i-1;
// Now see how long this segment of '-' are
while( $i < $n && $aData[$i] === '-' )
++$i;
if( $i < $n ) {
$pend=$i;
$size=$pend-$pstart;
$k=($aData[$pend]-$aData[$pstart])/$size;
// Replace the segment of '-' with a linear interpolated value.
for($j=1; $j < $size; ++$j ) {
$aData[$pstart+$j] = $aData[$pstart] + $j*$k ;
}
}
else {
// There are no valid end point. The '-' goes all the way to the end
// In that case we just set all the remaining values the the same as the
// last valid data point.
for( $j=$pstart+1; $j < $n; ++$j )
if( $this->iStartEndZero )
$aData[$j] = 0;
else
$aData[$j] = $aData[$pstart] ;
}
}
}
return true;
}
// To avoid duplicate of line drawing code here we just
// change the y-values for each plot and then restore it
// after we have made the stroke. We must do this copy since
// it wouldn't be possible to create an acc line plot
// with the same graphs, i.e AccLinePlot(array($pl,$pl,$pl));
// since this method would have a side effect.
function Stroke(&$img,&$xscale,&$yscale) {
$img->SetLineWeight($this->weight);
$this->numpoints = count($this->plots[0]->coords[0]);
// Allocate array
$coords[$this->nbrplots][$this->numpoints]=0;
for($i=0; $i<$this->numpoints; $i++) {
$coords[0][$i]=$this->plots[0]->coords[0][$i];
$accy=$coords[0][$i];
for($j=1; $j<$this->nbrplots; ++$j ) {
$coords[$j][$i] = $this->plots[$j]->coords[0][$i]+$accy;
$accy = $coords[$j][$i];
}
}
for($j=$this->nbrplots-1; $j>=0; --$j) {
$p=$this->plots[$j];
for( $i=0; $i<$this->numpoints; ++$i) {
$tmp[$i]=$p->coords[0][$i];
$p->coords[0][$i]=$coords[$j][$i];
}
$p->Stroke($img,$xscale,$yscale);
for( $i=0; $i<$this->numpoints; ++$i)
$p->coords[0][$i]=$tmp[$i];
$p->coords[0][]=$tmp;
}
}
} // Class
/* EOF */
?>
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