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625 lines
18 KiB
PHP
625 lines
18 KiB
PHP
<?php
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/*=======================================================================
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// File: JPGRAPH_LINE.PHP
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// Description: Line plot extension for JpGraph
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// Created: 2001-01-08
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// Author: Johan Persson (johanp@aditus.nu)
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// Ver: $Id: jpgraph_line.php,v 1.1 2006/07/07 13:37:14 powles Exp $
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//
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// Copyright (c) Aditus Consulting. All rights reserved.
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//========================================================================
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*/
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require_once ('jpgraph_plotmark.inc');
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// constants for the (filled) area
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DEFINE("LP_AREA_FILLED", true);
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DEFINE("LP_AREA_NOT_FILLED", false);
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DEFINE("LP_AREA_BORDER",false);
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DEFINE("LP_AREA_NO_BORDER",true);
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//===================================================
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// CLASS LinePlot
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// Description:
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//===================================================
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class LinePlot extends Plot{
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var $filled=false;
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var $fill_color='blue';
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var $mark=null;
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var $step_style=false, $center=false;
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var $line_style=1; // Default to solid
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var $filledAreas = array(); // array of arrays(with min,max,col,filled in them)
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var $barcenter=false; // When we mix line and bar. Should we center the line in the bar.
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var $fillFromMin = false ;
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var $fillgrad=false,$fillgrad_fromcolor='navy',$fillgrad_tocolor='silver',$fillgrad_numcolors=100;
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var $iFastStroke=false;
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//---------------
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// CONSTRUCTOR
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function LinePlot(&$datay,$datax=false) {
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$this->Plot($datay,$datax);
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$this->mark = new PlotMark();
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}
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//---------------
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// PUBLIC METHODS
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// Set style, filled or open
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function SetFilled($aFlag=true) {
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JpGraphError::RaiseL(10001);//('LinePlot::SetFilled() is deprecated. Use SetFillColor()');
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}
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function SetBarCenter($aFlag=true) {
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$this->barcenter=$aFlag;
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}
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function SetStyle($aStyle) {
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$this->line_style=$aStyle;
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}
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function SetStepStyle($aFlag=true) {
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$this->step_style = $aFlag;
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}
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function SetColor($aColor) {
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parent::SetColor($aColor);
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}
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function SetFillFromYMin($f=true) {
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$this->fillFromMin = $f ;
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}
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function SetFillColor($aColor,$aFilled=true) {
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$this->fill_color=$aColor;
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$this->filled=$aFilled;
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}
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function SetFillGradient($aFromColor,$aToColor,$aNumColors=100,$aFilled=true) {
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$this->fillgrad_fromcolor = $aFromColor;
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$this->fillgrad_tocolor = $aToColor;
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$this->fillgrad_numcolors = $aNumColors;
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$this->filled = $aFilled;
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$this->fillgrad = true;
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}
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function Legend(&$graph) {
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if( $this->legend!="" ) {
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if( $this->filled && !$this->fillgrad ) {
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$graph->legend->Add($this->legend,
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$this->fill_color,$this->mark,0,
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$this->legendcsimtarget,$this->legendcsimalt);
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}
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elseif( $this->fillgrad ) {
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$color=array($this->fillgrad_fromcolor,$this->fillgrad_tocolor);
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// In order to differentiate between gradients and cooors specified as an RGB triple
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$graph->legend->Add($this->legend,$color,"",-2 /* -GRAD_HOR */,
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$this->legendcsimtarget,$this->legendcsimalt);
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}
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else {
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$graph->legend->Add($this->legend,
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$this->color,$this->mark,$this->line_style,
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$this->legendcsimtarget,$this->legendcsimalt);
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}
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}
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}
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function AddArea($aMin=0,$aMax=0,$aFilled=LP_AREA_NOT_FILLED,$aColor="gray9",$aBorder=LP_AREA_BORDER) {
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if($aMin > $aMax) {
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// swap
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$tmp = $aMin;
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$aMin = $aMax;
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$aMax = $tmp;
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}
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$this->filledAreas[] = array($aMin,$aMax,$aColor,$aFilled,$aBorder);
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}
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// Gets called before any axis are stroked
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function PreStrokeAdjust(&$graph) {
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// If another plot type have already adjusted the
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// offset we don't touch it.
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// (We check for empty in case the scale is a log scale
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// and hence doesn't contain any xlabel_offset)
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if( empty($graph->xaxis->scale->ticks->xlabel_offset) ||
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$graph->xaxis->scale->ticks->xlabel_offset == 0 ) {
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if( $this->center ) {
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++$this->numpoints;
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$a=0.5; $b=0.5;
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} else {
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$a=0; $b=0;
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}
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$graph->xaxis->scale->ticks->SetXLabelOffset($a);
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$graph->SetTextScaleOff($b);
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//$graph->xaxis->scale->ticks->SupressMinorTickMarks();
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}
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}
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function SetFastStroke($aFlg=true) {
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$this->iFastStroke = $aFlg;
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}
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function FastStroke(&$img,&$xscale,&$yscale,$aStartPoint=0,$exist_x=true) {
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// An optimized stroke for many data points with no extra
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// features but 60% faster. You can't have values or line styles, or null
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// values in plots.
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$numpoints=count($this->coords[0]);
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if( $this->barcenter )
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$textadj = 0.5-$xscale->text_scale_off;
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else
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$textadj = 0;
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$img->SetColor($this->color);
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$img->SetLineWeight($this->weight);
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$pnts=$aStartPoint;
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while( $pnts < $numpoints ) {
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if( $exist_x ) $x=$this->coords[1][$pnts];
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else $x=$pnts+$textadj;
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$xt = $xscale->Translate($x);
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$y=$this->coords[0][$pnts];
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$yt = $yscale->Translate($y);
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if( is_numeric($y) ) {
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$cord[] = $xt;
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$cord[] = $yt;
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}
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elseif( $y == '-' && $pnts > 0 ) {
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// Just ignore
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}
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else {
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JpGraphError::RaiseL(10002);//('Plot too complicated for fast line Stroke. Use standard Stroke()');
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return;
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}
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++$pnts;
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} // WHILE
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$img->Polygon($cord,false,true);
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}
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function Stroke(&$img,&$xscale,&$yscale) {
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$idx=0;
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$numpoints=count($this->coords[0]);
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if( isset($this->coords[1]) ) {
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if( count($this->coords[1])!=$numpoints )
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JpGraphError::RaiseL(2003,count($this->coords[1]),$numpoints);
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//("Number of X and Y points are not equal. Number of X-points:".count($this->coords[1])." Number of Y-points:$numpoints");
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else
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$exist_x = true;
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}
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else
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$exist_x = false;
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if( $this->barcenter )
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$textadj = 0.5-$xscale->text_scale_off;
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else
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$textadj = 0;
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// Find the first numeric data point
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$startpoint=0;
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while( $startpoint < $numpoints && !is_numeric($this->coords[0][$startpoint]) )
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++$startpoint;
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// Bail out if no data points
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if( $startpoint == $numpoints )
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return;
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if( $this->iFastStroke ) {
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$this->FastStroke($img,$xscale,$yscale,$startpoint,$exist_x);
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return;
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}
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if( $exist_x )
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$xs=$this->coords[1][$startpoint];
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else
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$xs= $textadj+$startpoint;
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$img->SetStartPoint($xscale->Translate($xs),
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$yscale->Translate($this->coords[0][$startpoint]));
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if( $this->filled ) {
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$min = $yscale->GetMinVal();
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if( $min > 0 || $this->fillFromMin )
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$fillmin = $yscale->scale_abs[0];//Translate($min);
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else
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$fillmin = $yscale->Translate(0);
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$cord[$idx++] = $xscale->Translate($xs);
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$cord[$idx++] = $fillmin;
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}
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$xt = $xscale->Translate($xs);
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$yt = $yscale->Translate($this->coords[0][$startpoint]);
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$cord[$idx++] = $xt;
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$cord[$idx++] = $yt;
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$yt_old = $yt;
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$xt_old = $xt;
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$y_old = $this->coords[0][$startpoint];
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$this->value->Stroke($img,$this->coords[0][$startpoint],$xt,$yt);
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$img->SetColor($this->color);
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$img->SetLineWeight($this->weight);
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$img->SetLineStyle($this->line_style);
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$pnts=$startpoint+1;
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$firstnonumeric = false;
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while( $pnts < $numpoints ) {
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if( $exist_x ) $x=$this->coords[1][$pnts];
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else $x=$pnts+$textadj;
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$xt = $xscale->Translate($x);
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$yt = $yscale->Translate($this->coords[0][$pnts]);
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$y=$this->coords[0][$pnts];
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if( $this->step_style ) {
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// To handle null values within step style we need to record the
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// first non numeric value so we know from where to start if the
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// non value is '-'.
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if( is_numeric($y) ) {
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$firstnonumeric = false;
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if( is_numeric($y_old) ) {
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$img->StyleLine($xt_old,$yt_old,$xt,$yt_old);
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$img->StyleLine($xt,$yt_old,$xt,$yt);
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}
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elseif( $y_old == '-' ) {
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$img->StyleLine($xt_first,$yt_first,$xt,$yt_first);
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$img->StyleLine($xt,$yt_first,$xt,$yt);
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}
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else {
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$yt_old = $yt;
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$xt_old = $xt;
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}
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$cord[$idx++] = $xt;
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$cord[$idx++] = $yt_old;
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$cord[$idx++] = $xt;
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$cord[$idx++] = $yt;
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}
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elseif( $firstnonumeric==false ) {
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$firstnonumeric = true;
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$yt_first = $yt_old;
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$xt_first = $xt_old;
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}
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}
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else {
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$tmp1=$y;
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$prev=$this->coords[0][$pnts-1];
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if( $tmp1==='' || $tmp1===NULL || $tmp1==='X' ) $tmp1 = 'x';
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if( $prev==='' || $prev===null || $prev==='X' ) $prev = 'x';
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if( is_numeric($y) || (is_string($y) && $y != '-') ) {
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if( is_numeric($y) && (is_numeric($prev) || $prev === '-' ) ) {
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$img->StyleLineTo($xt,$yt);
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}
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else {
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$img->SetStartPoint($xt,$yt);
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}
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}
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if( $this->filled && $tmp1 !== '-' ) {
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if( $tmp1 === 'x' ) {
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$cord[$idx++] = $cord[$idx-3];
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$cord[$idx++] = $fillmin;
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}
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elseif( $prev === 'x' ) {
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$cord[$idx++] = $xt;
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$cord[$idx++] = $fillmin;
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$cord[$idx++] = $xt;
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$cord[$idx++] = $yt;
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}
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else {
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$cord[$idx++] = $xt;
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$cord[$idx++] = $yt;
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}
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}
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else {
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if( is_numeric($tmp1) && (is_numeric($prev) || $prev === '-' ) ) {
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$cord[$idx++] = $xt;
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$cord[$idx++] = $yt;
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}
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}
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}
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$yt_old = $yt;
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$xt_old = $xt;
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$y_old = $y;
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$this->StrokeDataValue($img,$this->coords[0][$pnts],$xt,$yt);
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++$pnts;
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}
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if( $this->filled ) {
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$cord[$idx++] = $xt;
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if( $min > 0 || $this->fillFromMin )
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$cord[$idx++] = $yscale->Translate($min);
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else
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$cord[$idx++] = $yscale->Translate(0);
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if( $this->fillgrad ) {
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$img->SetLineWeight(1);
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$grad = new Gradient($img);
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$grad->SetNumColors($this->fillgrad_numcolors);
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$grad->FilledFlatPolygon($cord,$this->fillgrad_fromcolor,$this->fillgrad_tocolor);
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$img->SetLineWeight($this->weight);
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}
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else {
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$img->SetColor($this->fill_color);
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$img->FilledPolygon($cord);
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}
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if( $this->line_weight > 0 ) {
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$img->SetColor($this->color);
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$img->Polygon($cord);
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}
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}
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if(!empty($this->filledAreas)) {
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$minY = $yscale->Translate($yscale->GetMinVal());
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$factor = ($this->step_style ? 4 : 2);
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for($i = 0; $i < sizeof($this->filledAreas); ++$i) {
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// go through all filled area elements ordered by insertion
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// fill polygon array
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$areaCoords[] = $cord[$this->filledAreas[$i][0] * $factor];
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$areaCoords[] = $minY;
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$areaCoords =
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array_merge($areaCoords,
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array_slice($cord,
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$this->filledAreas[$i][0] * $factor,
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($this->filledAreas[$i][1] - $this->filledAreas[$i][0] + ($this->step_style ? 0 : 1)) * $factor));
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$areaCoords[] = $areaCoords[sizeof($areaCoords)-2]; // last x
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$areaCoords[] = $minY; // last y
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if($this->filledAreas[$i][3]) {
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$img->SetColor($this->filledAreas[$i][2]);
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$img->FilledPolygon($areaCoords);
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$img->SetColor($this->color);
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}
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// Check if we should draw the frame.
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// If not we still re-draw the line since it might have been
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// partially overwritten by the filled area and it doesn't look
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// very good.
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// TODO: The behaviour is undefined if the line does not have
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// any line at the position of the area.
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if( $this->filledAreas[$i][4] )
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$img->Polygon($areaCoords);
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else
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$img->Polygon($cord);
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$areaCoords = array();
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}
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}
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if( $this->mark->type == -1 || $this->mark->show == false )
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return;
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for( $pnts=0; $pnts<$numpoints; ++$pnts) {
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if( $exist_x ) $x=$this->coords[1][$pnts];
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else $x=$pnts+$textadj;
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$xt = $xscale->Translate($x);
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$yt = $yscale->Translate($this->coords[0][$pnts]);
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if( is_numeric($this->coords[0][$pnts]) ) {
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if( !empty($this->csimtargets[$pnts]) ) {
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$this->mark->SetCSIMTarget($this->csimtargets[$pnts]);
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$this->mark->SetCSIMAlt($this->csimalts[$pnts]);
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}
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if( $exist_x )
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$x=$this->coords[1][$pnts];
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else
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$x=$pnts;
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$this->mark->SetCSIMAltVal($this->coords[0][$pnts],$x);
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$this->mark->Stroke($img,$xt,$yt);
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$this->csimareas .= $this->mark->GetCSIMAreas();
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$this->StrokeDataValue($img,$this->coords[0][$pnts],$xt,$yt);
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}
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}
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}
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} // Class
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//===================================================
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// CLASS AccLinePlot
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// Description:
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//===================================================
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class AccLinePlot extends Plot {
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var $plots=null,$nbrplots=0,$numpoints=0;
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var $iStartEndZero=true;
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//---------------
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// CONSTRUCTOR
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function AccLinePlot($plots) {
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$this->plots = $plots;
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$this->nbrplots = count($plots);
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$this->numpoints = $plots[0]->numpoints;
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for($i=0; $i < $this->nbrplots; ++$i ) {
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$this->LineInterpolate($this->plots[$i]->coords[0]);
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}
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}
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//---------------
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// PUBLIC METHODS
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function Legend(&$graph) {
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$n=count($this->plots);
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for($i=0; $i < $n; ++$i )
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$this->plots[$i]->DoLegend($graph);
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}
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function Max() {
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list($xmax) = $this->plots[0]->Max();
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$nmax=0;
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$n = count($this->plots);
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for($i=0; $i < $n; ++$i) {
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$nc = count($this->plots[$i]->coords[0]);
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$nmax = max($nmax,$nc);
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list($x) = $this->plots[$i]->Max();
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$xmax = Max($xmax,$x);
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}
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for( $i = 0; $i < $nmax; $i++ ) {
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// Get y-value for line $i by adding the
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// individual bars from all the plots added.
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// It would be wrong to just add the
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// individual plots max y-value since that
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// would in most cases give to large y-value.
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$y=$this->plots[0]->coords[0][$i];
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for( $j = 1; $j < $this->nbrplots; $j++ ) {
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$y += $this->plots[ $j ]->coords[0][$i];
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}
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$ymax[$i] = $y;
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}
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$ymax = max($ymax);
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return array($xmax,$ymax);
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}
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function Min() {
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$nmax=0;
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list($xmin,$ysetmin) = $this->plots[0]->Min();
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$n = count($this->plots);
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for($i=0; $i < $n; ++$i) {
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$nc = count($this->plots[$i]->coords[0]);
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$nmax = max($nmax,$nc);
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list($x,$y) = $this->plots[$i]->Min();
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$xmin = Min($xmin,$x);
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$ysetmin = Min($y,$ysetmin);
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}
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for( $i = 0; $i < $nmax; $i++ ) {
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// Get y-value for line $i by adding the
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// 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 */
|
|
?>
|