function pChart::drawFilledLineGraph in Visitors 7.0

Same name and namespace in other branches

1. 8 pchart/pChart.inc \pChart::drawFilledLineGraph()

File

pchart/pChart.inc, line 1180

Class

pChart

Code

function drawFilledLineGraph(&$Data, &$DataDescription, $Alpha = 100, $AroundZero = FALSE) {
  $Empty = -2147483647;

  /* Validate the Data and DataDescription array */
  $this
    ->validateDataDescription("drawFilledLineGraph", $DataDescription);
  $this
    ->validateData("drawFilledLineGraph", $Data);
  $LayerWidth = $this->GArea_X2 - $this->GArea_X1;
  $LayerHeight = $this->GArea_Y2 - $this->GArea_Y1;
  $GraphID = 0;
  foreach ($DataDescription["Values"] as $Key2 => $ColName) {
    $ID = 0;
    foreach ($DataDescription["Description"] as $keyI => $ValueI) {
      if ($keyI == $ColName) {
        $ColorID = $ID;
      }
      $ID++;
    }
    $aPoints = "";
    $aPoints[] = $this->GAreaXOffset;
    $aPoints[] = $LayerHeight;
    $this->Layers[0] = imagecreatetruecolor($LayerWidth, $LayerHeight);
    $C_White = imagecolorallocate($this->Layers[0], 255, 255, 255);
    imagefilledrectangle($this->Layers[0], 0, 0, $LayerWidth, $LayerHeight, $C_White);
    imagecolortransparent($this->Layers[0], $C_White);
    $XPos = $this->GAreaXOffset;
    $XLast = -1;
    $PointsCount = 2;
    $YZero = $LayerHeight - (0 - $this->VMin) * $this->DivisionRatio;
    if ($YZero > $LayerHeight) {
      $YZero = $LayerHeight;
    }
    $YLast = $Empty;
    foreach ($Data as $Key => $Values) {
      $Value = $Data[$Key][$ColName];
      $YPos = $LayerHeight - ($Value - $this->VMin) * $this->DivisionRatio;
      if (!is_numeric($Value)) {
        $PointsCount++;
        $aPoints[] = $XLast;
        $aPoints[] = $LayerHeight;
        $YLast = $Empty;
      }
      else {
        $PointsCount++;
        if ($YLast != $Empty) {
          $aPoints[] = $XPos;
          $aPoints[] = $YPos;
        }
        else {
          $PointsCount++;
          $aPoints[] = $XPos;
          $aPoints[] = $LayerHeight;
          $aPoints[] = $XPos;
          $aPoints[] = $YPos;
        }
        if ($YLast != $Empty && $AroundZero) {
          $Points = "";
          $Points[] = $XLast;
          $Points[] = $YLast;
          $Points[] = $XPos;
          $Points[] = $YPos;
          $Points[] = $XPos;
          $Points[] = $YZero;
          $Points[] = $XLast;
          $Points[] = $YZero;
          $C_Graph = imagecolorallocate($this->Layers[0], $this->Palette[$ColorID]["R"], $this->Palette[$ColorID]["G"], $this->Palette[$ColorID]["B"]);
          imagefilledpolygon($this->Layers[0], $Points, 4, $C_Graph);
        }
        $YLast = $YPos;
      }
      $XLast = $XPos;
      $XPos = $XPos + $this->DivisionWidth;
    }
    $aPoints[] = $LayerWidth - $this->GAreaXOffset;
    $aPoints[] = $LayerHeight;
    if ($AroundZero == FALSE) {
      $C_Graph = imagecolorallocate($this->Layers[0], $this->Palette[$ColorID]["R"], $this->Palette[$ColorID]["G"], $this->Palette[$ColorID]["B"]);
      imagefilledpolygon($this->Layers[0], $aPoints, $PointsCount, $C_Graph);
    }
    imagecopymerge($this->Picture, $this->Layers[0], $this->GArea_X1, $this->GArea_Y1, 0, 0, $LayerWidth, $LayerHeight, $Alpha);
    imagedestroy($this->Layers[0]);
    $GraphID++;
    $this
      ->drawLineGraph($Data, $DataDescription, $ColName);
  }
}