graphing/class.3dbargraph.php
author Dan
Tue, 20 Jan 2009 22:08:17 -0500
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permissions -rw-r--r--
Web interface can now update with AJAX
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<?php
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  require_once dirname(__FILE__) . "/class.graph.php";
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  class BarGraph extends CGraph {
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    var $bar_width = 32;
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    var $bar_height = 8;
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    var $bar_padding = 5;
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    var $bar_bordercolor = array(39, 78, 120);
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    var $bar_bgcolor = array(69, 129, 194);
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    var $bar_textfont = 2;
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    function BarGraph() {
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      $this->axis_deepness = $this->bar_height;
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      $this->graph_height = $this->graph_padding['top'] + $this->graph_areaheight + $this->graph_padding['bottom'];
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    }
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    /**
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     * Graph::SetBarBorderColor()
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     * Sets border color for bars
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     **/
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    function SetBarBorderColor($red, $green, $blue) {
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      $this->bar_bordercolor = array($red, $green, $blue);
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    }
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    /**
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     * Graph::SetBarBackgroundColor()
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     * Sets background color for bars
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     **/
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    function SetBarBackgroundColor($red, $green, $blue) {
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      $this->bar_bgcolor = array($red, $green, $blue);
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    }
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    /**
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     * Graph::SetBarDimensions()
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     * Sets with and height of each bar
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     **/
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    function SetBarDimensions($width, $height) {
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      if ($width > 0) $this->bar_width = $width;
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      if ($height >= 0) {
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        $this->bar_height = $height;
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        $this->axis_deepness = $height;
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      }
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    }
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    /**
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     * Graph::SetBarPadding()
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     * Sets padding (border) around each bar
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     **/
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    function SetBarPadding($padding) {
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      if ($padding > 0) $this->bar_padding = $padding;
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    }
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    function SetBarFont($font) {
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      $this->bar_textfont = 0;
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      switch ($font) {
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        case 'x-large': $this->bar_textfont++;
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        case 'large':   $this->bar_textfont++;
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        case 'medium':  $this->bar_textfont++;
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        case 'small':   $this->bar_textfont++;
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        case 'x-small': $this->bar_textfont++; break;
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        default:
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          $this->bar_textfont = $font;
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      }
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    }
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    function DrawGraph($file = "") {
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      $this->graph_width = $this->graph_padding['left'] +
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                           (count($this->data) * ($this->bar_width + ($this->bar_padding * 2))) +
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                           $this->graph_padding['right'];
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      $this->axis_deepness = $this->bar_height;
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      $this->im = imagecreatetruecolor($this->graph_width, $this->graph_height);
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      $this->axis_frontgridlines = 0;
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      $this->axis_xscalevisible = 0;
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      $this->axis_positions = array($this->axis_positions[0], 0, 0, 0);
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      CGraph::DrawGraph();
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      if ($this->axis_minY > 0) $this->axis_minY = 0;
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      if ($this->axis_maxY < 0) $this->axis_maxY = 0;
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      $this->__Draw_LeftBottom_Axis();
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      $p = 0;
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      foreach ($this->data as $name => $value) {
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        $p++;
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        $this->__DrawBarText($p, $name);
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        $this->__DrawBar($p, $value);
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      }
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      $this->__Draw_TopRight_Axis();
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      CGraph::DrawGraph2();
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      if (strlen($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 $ret;
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    }
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    /**
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     * Graph::__DrawBarText()
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     * Determines top and left to draw text to a choosen bar
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     **/
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    function __DrawBarText($bar, $text) {
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      $this->__DrawText($text,
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                        $this->graph_padding['left'] + (($this->bar_width + ($this->bar_padding * 2)) * ($bar - 0.5)),
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                        $this->graph_height - $this->graph_padding['bottom'] + 1,
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                        $this->im_axis_scalecolor,
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                        $this->bar_textfont,
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                        1);
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    }
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    /**
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     * Graph::__DrawBar()
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     * Draws a choosen bar with it's value
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     **/
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    function __DrawBar($bar, $value) {
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      $x = $this->graph_padding['left'] +
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           (($this->bar_width + ($this->bar_padding * 2)) * ($bar - 1)) +
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           $this->bar_padding;
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      $y = $this->graph_areaheight / ($this->axis_maxY - $this->axis_minY);
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      if ($value >= 0) {
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        $this->____DrawBar($x,
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                           $this->graph_height - $this->graph_padding['bottom'] - abs(floor($this->axis_minY * $y)) - floor($y * $value),
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                           $x + $this->bar_width,
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                           $this->graph_height - $this->graph_padding['bottom'] - abs(floor($this->axis_minY * $y)));
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      } else {
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        $this->____DrawBar($x,
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                           $this->graph_height - $this->graph_padding['bottom'] - abs(floor($this->axis_minY * $y)),
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                           $x + $this->bar_width,
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                           $this->graph_height - $this->graph_padding['bottom'] - floor($this->axis_minY * -$y) + floor($y * -$value));
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      }
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    }
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    /**
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     * Graph::____DrawBar()
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     * Draws the actual rectangles that form a bar
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     **/
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    function ____DrawBar($x1, $y1, $x2, $y2) {
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      $this->__AllocateColor("im_bar_bordercolor",
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                             $this->bar_bordercolor,
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                             ( $this->graph_transparencylevel * 1.5));
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      $this->__AllocateColor("im_bar_bgcolor",
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                             $this->bar_bgcolor,
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                             ( $this->graph_transparencylevel * 1.5));
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   151
                             
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      // base square
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      $this->__DrawPolygon(array($x1, $y2, $x2, $y2, $x2 + $this->bar_height,
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                                 $y2 - $this->bar_height, $x1 + $this->bar_height,
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                                 $y2 - $this->bar_height),
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                           $this->im_bar_bgcolor,
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                           true);
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      $this->__DrawPolygon(array($x1, $y2, $x2, $y2, $x2 + $this->bar_height,
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                                 $y2 - $this->bar_height, $x1 + $this->bar_height,
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                                 $y2 - $this->bar_height),
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                           $this->im_bar_bordercolor);
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   162
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      // back square
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      $this->__DrawPolygon(array($x1 + $this->bar_height, $y1 - $this->bar_height,
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                                 $x2 + $this->bar_height, $y1 - $this->bar_height,
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                                 $x2 + $this->bar_height, $y2 - $this->bar_height,
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                                 $x1 + $this->bar_height, $y2 - $this->bar_height),
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                           $this->im_bar_bgcolor,
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                           true);
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      $this->__DrawPolygon(array($x1 + $this->bar_height, $y1 - $this->bar_height,
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                                 $x2 + $this->bar_height, $y1 - $this->bar_height,
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                                 $x2 + $this->bar_height, $y2 - $this->bar_height,
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                                 $x1 + $this->bar_height, $y2 - $this->bar_height),
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                           $this->im_bar_bordercolor);
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      // left square
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      $this->__DrawPolygon(array($x1, $y1, $x1 + $this->bar_height, $y1 - $this->bar_height,
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                                 $x1 + $this->bar_height, $y2 - $this->bar_height,
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                                 $x1, $y2),
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                           $this->im_bar_bgcolor,
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                           true);
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      $this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2, $y2, $x1, $y2),
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                           $this->im_bar_bordercolor);
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   184
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      // front square
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      $this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2, $y2, $x1, $y2),
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                           $this->im_bar_bgcolor,
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                           true);
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      $this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2, $y2, $x1, $y2),
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                           $this->im_bar_bordercolor);
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parents:
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      // right square
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      $this->__DrawPolygon(array($x2, $y2, $x2, $y1, $x2 + $this->bar_height,
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                                 $y1 - $this->bar_height, $x2 + $this->bar_height,
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                                 $y2 - $this->bar_height),
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                           $this->im_bar_bgcolor,
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   197
                           true);
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   198
      $this->__DrawPolygon(array($x2, $y2, $x2, $y1, $x2 + $this->bar_height,
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   199
                                 $y1 - $this->bar_height, $x2 + $this->bar_height,
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   200
                                 $y2 - $this->bar_height),
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Dan
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                           $this->im_bar_bordercolor);
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   202
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      // top square
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   204
      $this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2 + $this->bar_height,
ce2e9caf2dfa Added support for different types of graphs; added a last 60 minutes line graph
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parents:
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   205
                                 $y1 - $this->bar_height, $x1 + $this->bar_height,
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parents:
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   206
                                 $y1 - $this->bar_height),
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Dan
parents:
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   207
                           $this->im_bar_bgcolor,
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Dan
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                           true);
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Dan
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   209
      $this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2 + $this->bar_height,
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   210
                                 $y1 - $this->bar_height, $x1 + $this->bar_height,
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Dan
parents:
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   211
                                 $y1 - $this->bar_height),
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Dan
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                           $this->im_bar_bordercolor);
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   213
    }
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   214
    
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    /**
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     * Graph::__Load3dbarValues()
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     * Loads definitions to 3d bar settings
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     **/
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    function __Load3dbarValues($data) {
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      foreach ($data as $name => $value) {
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   221
        $name = strtolower($name);
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   222
        switch ($name) {
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   223
          case 'background-color':
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   224
            $this->__SetColorToValue("bar_bgcolor", $value);
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            break;
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   226
          case 'border-color':
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   227
            $this->__SetColorToValue("bar_bordercolor", $value);
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   228
            break;
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   229
          case 'padding':
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   230
            $this->bar_padding = $value;
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   231
            break;
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   232
          case 'width':
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   233
            $this->bar_width = (int) $value;
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   234
            break;
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   235
          case 'height':
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   236
            $this->bar_height = (int) $value;
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   237
            $this->axis_deepness = (int) $value;
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   238
            break;
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   239
        }
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   240
      }
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   241
    }
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   242
  }
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parents:
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   243
?>