graphing/class.piegraph.php
author Dan
Sat, 10 Jan 2009 14:12:36 -0500
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<?php
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  require_once dirname(__FILE__) . "/class.graph.php";
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  class PieGraph extends CGraph {
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    var $pie_color = array(array(39, 78, 120));
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    var $pie_deepnesscolor = array(array(9, 48, 90));
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    var $pie_bgcolor = array(array(69, 129, 194));
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    var $pie_deepness = 10;
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    var $pie_total = 0;
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    var $pie_startoffset = 0;
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    function Graph() {
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      $this->graph_width = $this->graph_padding['left'] + $this->graph_areawidth + $this->graph_padding['right'];
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      $this->graph_height = $this->graph_padding['top'] + $this->graph_areaheight + $this->graph_padding['bottom'];
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    }
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    function SetPieColor($red, $green, $blue) {
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      $this->pie_color = array($red, $green, $blue);
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    }
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    function AddPieColor($red, $green, $blue) {
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      if (!is_array($this->pie_color[0])) {
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        $this->pie_color = array($this->pie_color);
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      }
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      $this->pie_color[] = array($red, $green, $blue);
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    }
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    function SetPieBackgroundColor($red, $green, $blue) {
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      $this->pie_bgcolor = array($red, $green, $blue);
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    }
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    function AddPieBackgroundColor($red, $green, $blue) {
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      if (!is_array($this->pie_bgcolor[0])) {
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        $this->pie_bgcolor = array($this->pie_bgcolor);
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      }
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      $this->pie_bgcolor[] = array($red, $green, $blue);
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    }
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    function SetPieDeepnessColor($red, $green, $blue) {
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      $this->pie_deepnesscolor = array($red, $green, $blue);
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    }
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    function AddPieDeepnessColor($red, $green, $blue) {
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      if (!is_array($this->pie_deepnesscolor[0])) {
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        $this->pie_deepnesscolor = array($this->pie_deepnesscolor);
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      }
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      $this->pie_deepnesscolor[] = array($red, $green, $blue);
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    }
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    function SetPieTotalValue($total) {
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      $this->pie_total = $total;
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    }
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    function SetPieStartOffset($offset) {
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      if ($offset < 0 || $offset > 359) $offset = 0;
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      $this->pie_startoffset = $offset;
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    }
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    function SetPieData($data) {
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      CGraph::SetData($data);
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    }
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    function DrawGraph($file = "") {
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      $this->im = imagecreatetruecolor($this->graph_width, $this->graph_height);
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      $this->axis_positions = array(0, 0, 0, 0);
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      $this->axis_xscalevisible = 0;
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      $this->axis_yscalevisible = 0;
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      $this->axis_gridlines = 0;
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      CGraph::DrawGraph();
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      if ($this->pie_total == 0) {
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        foreach ($this->data as $name => $value) {
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          $this->pie_total += $value;
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        }
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      }
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      // deepness
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      for ($i = $this->pie_deepness; $i > 0; $i--) {
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        $offset = 0;
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        $p = 0;
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        foreach ($this->data as $n => $value) {
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          if (!$this->pie_deepnesscolor[$p]) {
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            $this->__AllocateColor("im_pie_deepnesscolor", $this->pie_deepnesscolor[$p], 0, $p);
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          }
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          $from = round($this->pie_startoffset - ($offset * 360 / $this->pie_total));
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          $to = round($this->pie_startoffset - (($value + $offset) * 360 / $this->pie_total));
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          if ($from < 0) $from += 360;
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          if ($to < 0) $to += 360;
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          imagefilledarc($this->im, round($this->graph_width / 2), round($this->graph_height / 2) + $i,
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                                    $this->graph_areawidth, $this->graph_areaheight,
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                                    $to, $from, $this->pie_deepnesscolor[$p], IMG_ARC_PIE);
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          $offset += $value;
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          $p++;
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        }
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      }
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      $offset = 0;
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      $p = 0;
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      foreach ($this->data as $n => $value) {
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        $this->__AllocateColor("im_pie_color", $this->pie_color[$p], 0, $p);
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        $from = round($this->pie_startoffset - ($offset * 360 / $this->pie_total));
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        $to = round($this->pie_startoffset - (($value + $offset) * 360 / $this->pie_total));
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        if ($from < 0) $from += 360;
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        if ($to < 0) $to += 360;
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        imagefilledarc($this->im, round($this->graph_width / 2), round($this->graph_height / 2),
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                                  $this->graph_areawidth, $this->graph_areaheight,
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                                  $to, $from, $this->im_pie_color[$p], IMG_ARC_PIE);
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        $offset += $value;
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        $p++;
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      }
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      CGraph::DrawGraph2();
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      if (strlen($file)) {
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        $ret = imagepng($this->im, $file);
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      } else {
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        header("Content-Type: image/png"); // thanks to Marcin G. :)
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        imagepng($this->im);
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        $ret = true;
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      }
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      imagedestroy($this->im);
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      return $ret;
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    }
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    function __DrawPieSlice($frompercent, $topercent, $color, $deepcolor) {
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      $from = round(270 - ($frompercent * 3.6));
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      $to = round(270 - ($topercent * 3.6));
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      if ($from < 0) $from += 360;
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      if ($to < 0) $to += 360;
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      //echo "FROM:" . $from . " TO:" . $to . "<br>\n";
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      for ($i = $this->pie_deepness; $i > 0; $i--) {
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        imagefilledarc($this->im, round($this->graph_width / 2), round($this->graph_height / 2) + $i,
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                                  round($this->graph_areawidth / 2), round($this->graph_areaheight / 2),
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                                  $to, $from, $deepcolor, IMG_ARC_PIE);
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      }
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      imagefilledarc($this->im, round($this->graph_width / 2), round($this->graph_height / 2),
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                                round($this->graph_areawidth / 2), round($this->graph_areaheight / 2),
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                                $to, $from, $color, IMG_ARC_PIE);
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    }
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    /**
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     * Graph::__LoadPieValues()
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     * Loads definitions to pie settings
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     **/
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    function __LoadPieValues($data) {
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      foreach ($data as $name => $value) {
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        $name = strtolower($name);
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        switch ($name) {
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          case 'background-color':
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            $this->__SetColorToValue("pie_bgcolor", $value);
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            break;
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          case 'color':
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            $this->__SetColorToValue("pie_color", $value);
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   146
            break;
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   147
          case 'deepness-color':
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   148
            $this->__SetColorToValue("pie_depnesscolor", $value);
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   149
            break;
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   150
          case 'offset':
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   151
            $this->SetPieStartOffset($value);
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   152
            break;
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   153
          case 'total':
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   154
            $this->SetPieTotalValue($value);
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   155
        }
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   156
      }
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   157
    }
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   158
  }
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parents:
diff changeset
   159
?>