<?php
/* Copyright (c) 2003 Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * $Id$
 * $Source$
 */

/**
	    \file       htdocs/graph.class.php
		\brief      Fichier de la classe mère de gestion des graph phplot
		\version    $Revision$
*/

include_once(DOL_DOCUMENT_ROOT."/includes/phplot/phplot.php");


/**
        \class      Graph
	    \brief      Classe mère permettant la gestion des graph phplot
*/

class Graph
{
  var $db;
  var $errorstr;

  /**
   *    \brief      Prépare le graphique
   *    \param      file    Nom du fichier image
   *    \param      data    Tableau des données
   *    \param      title   Titre de l'image
   */
  function prepare($file, $data, $title='')
  {
    //Define the object
    $this->graph = new PHPlot($this->width, $this->height);
    $this->graph->SetIsInline(1);

    $this->graph->SetPlotType( $this->PlotType );

    if (isset($this->MaxValue))
      {
	$nts = array();
	$this->MaxValue = $this->MaxValue + 1;
	$max = $this->MaxValue;
	if (($max % 2) <> 0)
	  {
	    $this->MaxValue = $this->MaxValue + 1;
	    $max++;
	  }

	$this->graph->SetPlotAreaWorld(0,0,12,$this->MaxValue);

	$j = 0;
	for ($i = 1 ; $i < 11 ; $i++)
	  {
	    $res = $max % $i;
	    $cal = $max / $i;
	    
	    if ($res == 0 && $cal <= 11)
	      {
		$nts[$j] = $cal;
		$j++;
	      }

	  }
	rsort($nts);

	$this->graph->SetNumVertTicks($nts[0]);
      }
    else
      {
	$this->graph->SetPlotAreaPixels(60, 10, $this->width-10, $this->height - 30) ;
      }

    $this->graph->SetBackgroundColor($this->bgcolor);

    // TODO
    //$this->graph->SetPrecisionY($this->precision_Y);

    $this->graph->SetDataColors($this->datacolor, $this->bordercolor);

    $this->graph->SetYGridLabelType("data");

    $this->graph->SetOutputFile($file);

    //Set some data
    $this->graph->SetDataValues($data);

    //    $this->graph->SetVertTickIncrement(0);

    $this->graph->SetDrawYGrid(1); 

    //
    if (strlen($title))
      {
	$this->graph->SetTitle = $title;
      }

    //    $this->graph->SetSkipBottomTick(1);

    // Affiche les valeurs
    //$this->graph->SetDrawDataLabels('1');
    //$this->graph->SetLabelScalePosition('1');

    $this->graph->SetVertTickPosition('plotleft');

    $this->graph->SetMarginsPixels(100,50,10,30);

    if (isset($this->Legend))
      {
	$this->graph->SetLegend($this->Legend);
	$this->graph->SetLegendWorld(12,$this->MaxValue);
      }

    //Draw it
    //    $this->graph->DrawGraph();
  }

  function SetPrecisionY($which_prec)
  {
    $this->precision_y = $which_prec;
    return true;
  }

  function SetYLabel($label)
  {
    $this->YLabel = $label;
  }

  function SetWidth($w)
  {
    $this->width = $w;
  }

  function SetLegend($legend)
  {
    $this->Legend = $legend;
  }

  function SetMaxValue($max)
  {
    $this->MaxValue = $max;
  }

  function SetHeight($h)
  {
    $this->height = $h;
  }

  function ResetBgColor()
  {
    unset($this->bgcolor);
  }
  
  function SetBgColor($bg_color = array(255,255,255))
  {
    $this->bgcolor = $bg_color;
  }

  function ResetDataColor()
  {
    unset($this->datacolor);
  }

  function GetMaxValue()
  {
    $k = 0;
    $vals = array();

    $nblines = sizeof($this->data);
    $nbvalues = sizeof($this->data[0]) - 1;

    for ($j = 0 ; $j < $nblines ; $j++)
      {
	for ($i = 0 ; $i < $nbvalues ; $i++)
	  {
	    $vals[$k] = $this->data[$j][$i+1];
	    $k++;
	  }
      }
    rsort($vals);
    return $vals[0];
  }

  function GetAmountMaxValue()
  {

    $max = ceil($this->GetMaxValue());
    $size = strlen("$max");
    if (substr($max,0,1) == 9)
      {
	$res = 1;
      }
    else
      {
	$size = $size - 1;
	$res = substr($max,0,1) + 1;
      }

    for ($i = 0 ; $i < $size ; $i++)
      {
	$res .= "0";
      }

	return ($res - 2);
  }

}

?>