<?php
  /*=======================================================================
   // File:        JPGRAPH_MGRAPH.PHP
   // Description: Class to handle multiple graphs in the same image
   // Created:     2006-01-15
   // Ver:         $Id: jpgraph_mgraph.php 1770 2009-08-17 06:10:22Z ljp $
   //
   // Copyright (c) Asial Corporation. All rights reserved.
   //========================================================================
   */
  
  //=============================================================================
  // CLASS MGraph
  // Description: Create a container image that can hold several graph
  //=============================================================================
  class MGraph {
  
      public $title = null, $subtitle = null, $subsubtitle = null;
  
      protected $img=NULL;
      protected $iCnt=0,$iGraphs = array(); // image_handle, x, y, fx, fy, sizex, sizey
      protected $iFillColor='white', $iCurrentColor=0;
      protected $lm=4,$rm=4,$tm=4,$bm=4;
      protected $iDoFrame = FALSE, $iFrameColor = 'black', $iFrameWeight = 1;
      protected $iLineWeight = 1;
      protected $expired=false;
      protected $cache=null,$cache_name = '',$inline=true;
      protected $image_format='png',$image_quality=75;
      protected $iWidth=NULL,$iHeight=NULL;
      protected $background_image='',$background_image_center=true,
      $backround_image_format='',$background_image_mix=100,
      $background_image_y=NULL, $background_image_x=NULL;
      private $doshadow=false, $shadow_width=4, $shadow_color='gray@0.5';
      public $footer;
  
  
      // Create a new instane of the combined graph
      function __construct($aWidth=NULL,$aHeight=NULL,$aCachedName='',$aTimeOut=0,$aInline=true) {
          $this->iWidth = $aWidth;
          $this->iHeight = $aHeight;
  
          // If the cached version exist just read it directly from the
          // cache, stream it back to browser and exit
          if( $aCachedName!='' && READ_CACHE && $aInline ) {
              $this->cache = new ImgStreamCache();
              $this->cache->SetTimeOut($aTimeOut);
              $image = new Image();
              if( $this->cache->GetAndStream($image,$aCachedName) ) {
                  exit();
              }
          }
          $this->inline = $aInline;
          $this->cache_name = $aCachedName;
  
          $this->title = new Text();
          $this->title->ParagraphAlign('center');
          $this->title->SetFont(FF_FONT2,FS_BOLD);
          $this->title->SetMargin(3);
          $this->title->SetAlign('center');
  
          $this->subtitle = new Text();
          $this->subtitle->ParagraphAlign('center');
          $this->subtitle->SetFont(FF_FONT1,FS_BOLD);
          $this->subtitle->SetMargin(3);
          $this->subtitle->SetAlign('center');
  
          $this->subsubtitle = new Text();
          $this->subsubtitle->ParagraphAlign('center');
          $this->subsubtitle->SetFont(FF_FONT1,FS_NORMAL);
          $this->subsubtitle->SetMargin(3);
          $this->subsubtitle->SetAlign('center');
  
          $this->footer = new Footer();
  
      }
  
      // Specify background fill color for the combined graph
      function SetFillColor($aColor) {
          $this->iFillColor = $aColor;
      }
  
      // Add a frame around the combined graph
      function SetFrame($aFlg,$aColor='black',$aWeight=1) {
          $this->iDoFrame = $aFlg;
          $this->iFrameColor = $aColor;
          $this->iFrameWeight = $aWeight;
      }
  
      // Specify a background image blend
      function SetBackgroundImageMix($aMix) {
          $this->background_image_mix = $aMix ;
      }
  
      // Specify a background image
      function SetBackgroundImage($aFileName,$aCenter_aX=NULL,$aY=NULL) {
          // Second argument can be either a boolean value or
          // a numeric
          $aCenter=TRUE;
          $aX=NULL;
  
          if( is_numeric($aCenter_aX) ) {
              $aX=$aCenter_aX;
          }
  
          // Get extension to determine image type
          $e = explode('.',$aFileName);
          if( !$e ) {
              JpGraphError::RaiseL(12002,$aFileName);
              //('Incorrect file name for MGraph::SetBackgroundImage() : '.$aFileName.' Must have a valid image extension (jpg,gif,png) when using autodetection of image type');
          }
  
          $valid_formats = array('png', 'jpg', 'gif');
          $aImgFormat = strtolower($e[count($e)-1]);
          if ($aImgFormat == 'jpeg')  {
              $aImgFormat = 'jpg';
          }
          elseif (!in_array($aImgFormat, $valid_formats) )  {
              JpGraphError::RaiseL(12003,$aImgFormat,$aFileName);
              //('Unknown file extension ($aImgFormat) in MGraph::SetBackgroundImage() for filename: '.$aFileName);
          }
  
          $this->background_image = $aFileName;
          $this->background_image_center=$aCenter;
          $this->background_image_format=$aImgFormat;
          $this->background_image_x = $aX;
          $this->background_image_y = $aY;
      }
  
      function _strokeBackgroundImage() {
          if( $this->background_image == '' ) return;
  
          $bkgimg = Graph::LoadBkgImage('',$this->background_image);
  
          // Background width & Heoght
          $bw = imagesx($bkgimg);
          $bh = imagesy($bkgimg);
  
          // Canvas width and height
          $cw = imagesx($this->img);
          $ch = imagesy($this->img);
  
          if( $this->doshadow ) {
              $cw -= $this->shadow_width;
              $ch -= $this->shadow_width;
          }
  
          if( $this->background_image_x === NULL || $this->background_image_y === NULL ) {
              if( $this->background_image_center ) {
                  // Center original image in the plot area
                  $x = round($cw/2-$bw/2); $y = round($ch/2-$bh/2);
              }
              else {
                  // Just copy the image from left corner, no resizing
                  $x=0; $y=0;
              }
          }
          else {
              $x = $this->background_image_x;
              $y = $this->background_image_y;
          }
          imagecopymerge($this->img,$bkgimg,$x,$y,0,0,$bw,$bh,$this->background_image_mix);
      }
  
      function AddMix($aGraph,$x=0,$y=0,$mix=100,$fx=0,$fy=0,$w=0,$h=0) {
          $this->_gdImgHandle($aGraph->Stroke( _IMG_HANDLER),$x,$y,$fx=0,$fy=0,$w,$h,$mix);
      }
  
      function Add($aGraph,$x=0,$y=0,$fx=0,$fy=0,$w=0,$h=0) {
          $this->_gdImgHandle($aGraph->Stroke( _IMG_HANDLER),$x,$y,$fx=0,$fy=0,$w,$h);
      }
  
      function _gdImgHandle($agdCanvas,$x,$y,$fx=0,$fy=0,$w=0,$h=0,$mix=100) {
          if( $w == 0 ) {
              $w = @imagesx($agdCanvas);
          }
          if( $w === NULL ) {
              JpGraphError::RaiseL(12007);
              //('Argument to MGraph::Add() is not a valid GD image handle.');
              return;
          }
          if( $h == 0 ) {
              $h = @imagesy($agdCanvas);
          }
          $this->iGraphs[$this->iCnt++] = array($agdCanvas,$x,$y,$fx,$fy,$w,$h,$mix);
      }
  
      function SetMargin($lm,$rm,$tm,$bm) {
          $this->lm = $lm;
          $this->rm = $rm;
          $this->tm = $tm;
          $this->bm = $bm;
      }
  
      function SetExpired($aFlg=true) {
          $this->expired = $aFlg;
      }
  
      function SetImgFormat($aFormat,$aQuality=75) {
          $this->image_format = $aFormat;
          $this->image_quality = $aQuality;
      }
  
      // Set the shadow around the whole image
      function SetShadow($aShowShadow=true,$aShadowWidth=4,$aShadowColor='gray@0.3') {
          $this->doshadow = $aShowShadow;
          $this->shadow_color = $aShadowColor;
          $this->shadow_width = $aShadowWidth;
          $this->footer->iBottomMargin += $aShadowWidth;
          $this->footer->iRightMargin += $aShadowWidth;
      }
  
      function StrokeTitle($image,$w,$h) {
          // Stroke title
          if( $this->title->t !== '' ) {
  
              $margin = 3;
  
              $y = $this->title->margin;
              if( $this->title->halign == 'center' ) {
                  $this->title->Center(0,$w,$y);
              }
              elseif( $this->title->halign == 'left' ) {
                  $this->title->SetPos($this->title->margin+2,$y);
              }
              elseif( $this->title->halign == 'right' ) {
                  $indent = 0;
                  if( $this->doshadow ) {
                      $indent = $this->shadow_width+2;
                  }
                  $this->title->SetPos($w-$this->title->margin-$indent,$y,'right');
              }
              $this->title->Stroke($image);
  
              // ... and subtitle
              $y += $this->title->GetTextHeight($image) + $margin + $this->subtitle->margin;
              if( $this->subtitle->halign == 'center' ) {
                  $this->subtitle->Center(0,$w,$y);
              }
              elseif( $this->subtitle->halign == 'left' ) {
                  $this->subtitle->SetPos($this->subtitle->margin+2,$y);
              }
              elseif( $this->subtitle->halign == 'right' ) {
                  $indent = 0;
                  if( $this->doshadow ) {
                      $indent = $this->shadow_width+2;
                  }
                  $this->subtitle->SetPos($this->img->width-$this->subtitle->margin-$indent,$y,'right');
              }
              $this->subtitle->Stroke($image);
  
              // ... and subsubtitle
              $y += $this->subtitle->GetTextHeight($image) + $margin + $this->subsubtitle->margin;
              if( $this->subsubtitle->halign == 'center' ) {
                  $this->subsubtitle->Center(0,$w,$y);
              }
              elseif( $this->subsubtitle->halign == 'left' ) {
                  $this->subsubtitle->SetPos($this->subsubtitle->margin+2,$y);
              }
              elseif( $this->subsubtitle->halign == 'right' ) {
                  $indent = 0;
                  if( $this->doshadow ) {
                      $indent = $this->shadow_width+2;
                  }
                  $this->subsubtitle->SetPos($w-$this->subsubtitle->margin-$indent,$y,'right');
              }
              $this->subsubtitle->Stroke($image);
  
          }
      }
  
      function Stroke($aFileName='') {
          // Find out the necessary size for the container image
          $w=0; $h=0;
          for($i=0; $i < $this->iCnt; ++$i ) {
              $maxw = $this->iGraphs[$i][1]+$this->iGraphs[$i][5];
              $maxh = $this->iGraphs[$i][2]+$this->iGraphs[$i][6];
              $w = max( $w, $maxw );
              $h = max( $h, $maxh );
          }
          $w += $this->lm+$this->rm;
          $h += $this->tm+$this->bm;
  
          // User specified width,height overrides
          if( $this->iWidth !== NULL && $this->iWidth !== 0 ) $w = $this->iWidth;
          if( $this->iHeight!== NULL && $this->iHeight !== 0) $h = $this->iHeight;
  
          if( $this->doshadow ) {
              $w += $this->shadow_width;
              $h += $this->shadow_width;
          }
  
          $image = new Image($w,$h);
          $image->SetImgFormat( $this->image_format,$this->image_quality);
  
          if( $this->doshadow ) {
              $image->SetColor($this->iFrameColor);
              $image->ShadowRectangle(0,0,$w-1,$h-1,$this->iFillColor,$this->shadow_width,$this->shadow_color);
              $w -= $this->shadow_width;
              $h -= $this->shadow_width;
          }
          else {
              $image->SetColor($this->iFillColor);
              $image->FilledRectangle(0,0,$w-1,$h-1);
          }
          $image->SetExpired($this->expired);
  
          $this->img = $image->img;
          $this->_strokeBackgroundImage();
  
          if( $this->iDoFrame && ! $this->doshadow ) {
             $image->SetColor($this->iFrameColor);
             $image->SetLineWeight($this->iFrameWeight);
             $image->Rectangle(0,0,$w-1,$h-1);
          }
  
          // Copy all sub graphs to the container
          for($i=0; $i < $this->iCnt; ++$i ) {
              $image->CopyMerge($this->iGraphs[$i][0],
                              $this->iGraphs[$i][1]+$this->lm,$this->iGraphs[$i][2]+$this->tm,
                              $this->iGraphs[$i][3],$this->iGraphs[$i][4],
                              $this->iGraphs[$i][5],$this->iGraphs[$i][6],
                              -1,-1, /* Full from width and height */
                              $this->iGraphs[$i][7]);
  
  
          }
  
          $this->StrokeTitle($image,$w,$h);
          $this->footer->Stroke($image);
  
          // Output image
          if( $aFileName == _IMG_HANDLER ) {
              return $image->img;
          }
          else {
              //Finally stream the generated picture
              $this->cache = new ImgStreamCache();
              $this->cache->PutAndStream($image,$this->cache_name,$this->inline,$aFileName);
          }
      }
  }
  
  // EOF
  
  ?>