/Upload/inc/class_graph.php
PHP | 337 lines | 158 code | 47 blank | 132 comment | 24 complexity | b35afae1740e15ec21aad1a23b5ab337 MD5 | raw file
- <?php
- /**
- * MyBB 1.8
- * Copyright 2014 MyBB Group, All Rights Reserved
- *
- * Website: http://www.mybb.com
- * License: http://www.mybb.com/about/license
- *
- */
- class Graph {
- /**
- * The width of the image.
- *
- * @var integer
- */
- public $img_width = 1000;
- /**
- * The height of the image.
- *
- * @var integer
- */
- public $img_height = 300;
- /**
- * The image resource handle.
- *
- * @var resource
- */
- private $im;
- /**
- * The amount of x pixels to start inside the image for the graph
- *
- * @var integer
- */
- public $inside_x = 65;
- /**
- * The amount of y pixels to start inside the image for the graph
- *
- * @var integer
- */
- public $inside_y = 30;
- /**
- * The width of the inside graph
- *
- * @var integer
- */
- public $inside_width = 930;
- /**
- * The height of the inside graph
- *
- * @var integer
- */
- public $inside_height = 220;
- /**
- * The x, y points for the graph
- *
- * @var array
- */
- public $points = array();
- /**
- * The corresponding x labels for the graph
- *
- * @var array
- */
- public $x_labels = array();
- /**
- * The bottom label for the graph
- *
- * @var string
- */
- public $bottom_label = "";
- /**
- * Constructor of class. Initializes the barebore graph.
- */
- public function __construct()
- {
- // Setup initial graph layout
- // Check for GD >= 2, create base image
- if(gd_version() >= 2)
- {
- $this->im = imagecreatetruecolor($this->img_width, $this->img_height);
- }
- else
- {
- $this->im = imagecreate($this->img_width, $this->img_height);
- }
- // No GD support, die.
- if(!$this->im)
- {
- return;
- }
- if(function_exists("imageantialias"))
- {
- imageantialias($this->im, true);
- }
- // Fill the background
- imagefill($this->im, 0, 0, $this->color(239, 239, 239));
- // Create our internal working graph box
- $inside_end_x = $this->inside_x+$this->inside_width;
- $inside_end_y = $this->inside_y+$this->inside_height;
- $this->image_create_rectangle($this->inside_x, $this->inside_y, $inside_end_x, $inside_end_y, 4, $this->color(254, 254, 254));
- // Draw our three lines inside our internal working graph area
- for($i = 1; $i < 4; ++$i)
- {
- $y_value = $this->inside_y+(($this->inside_height/4)*$i);
- imageline($this->im, $this->inside_x, $y_value, $inside_end_x, $y_value, $this->color(185, 185, 185));
- }
- }
- /**
- * Select and allocate a color to the internal image resource
- *
- * @param integer $red The red value
- * @param integer $green The green value
- * @param integer $blue The blue value
- * @return integer A color identifier
- */
- private function color($red, $green, $blue)
- {
- return imagecolorallocate($this->im, $red, $green, $blue);
- }
- /**
- * Creates a filled rectangle with optional rounded corners
- *
- * @param integer $x1 The initial x value
- * @param integer $y1 The initial y value
- * @param integer $x2 The ending x value
- * @param integer $y2 The ending y value
- * @param integer $radius The optional radius
- * @param integer $color The optional rectangle color (defaults to black)
- */
- private function image_create_rectangle($x1, $y1, $x2, $y2, $radius=1, $color=null)
- {
- if($color == null)
- {
- $color = $this->color(0, 0, 0);
- }
- // Draw our rectangle
- imagefilledrectangle($this->im, $x1, $y1+$radius, $x2, $y2-$radius, $color);
- imagefilledrectangle($this->im, $x1+$radius, $y1, $x2-$radius, $y2, $color);
- if($radius > 0)
- {
- $diameter = $radius*2;
- // Now draw our four corners on the rectangle
- imagefilledellipse($this->im, $x1+$radius, $y1+$radius, $diameter, $diameter, $color);
- imagefilledellipse($this->im, $x1+$radius, $y2-$radius, $diameter, $diameter, $color);
- imagefilledellipse($this->im, $x2-$radius, $y2-$radius, $diameter, $diameter, $color);
- imagefilledellipse($this->im, $x2-$radius, $y1+$radius, $diameter, $diameter, $color);
- }
- }
- /**
- * Creates a nicer thick line for angled lines
- *
- * @param integer $x1 The initial x value
- * @param integer $y1 The initial y value
- * @param integer $x2 The ending x value
- * @param integer $y2 The ending y value
- * @param integer $color The optional rectangle color (defaults to black)
- * @param integer $thick The optional thickness (defaults to 1)
- * @return int
- */
- private function imagelinethick($x1, $y1, $x2, $y2, $color, $thick = 1)
- {
- if($thick == 1)
- {
- return imageline($this->im, $x1, $y1, $x2, $y2, $color);
- }
- $t = $thick / 2 - 0.5;
- if($x1 == $x2 || $y1 == $y2)
- {
- return imagefilledrectangle($this->im, round(min($x1, $x2) - $t), round(min($y1, $y2) - $t), round(max($x1, $x2) + $t), round(max($y1, $y2) + $t), $color);
- }
- $k = ($y2 - $y1) / ($x2 - $x1); //y = kx + q
- $a = $t / sqrt(1 + pow($k, 2));
- $points = array(
- round($x1 - (1+$k)*$a), round($y1 + (1-$k)*$a),
- round($x1 - (1-$k)*$a), round($y1 - (1+$k)*$a),
- round($x2 + (1+$k)*$a), round($y2 - (1-$k)*$a),
- round($x2 + (1-$k)*$a), round($y2 + (1+$k)*$a),
- );
- imagefilledpolygon($this->im, $points, 4, $color);
- return imagepolygon($this->im, $points, 4, $color);
- }
- /**
- * Adds an array of x, y points to the internal points array
- *
- * @param array $points The array of x, y points to add
- */
- public function add_points($points)
- {
- $this->points = array_merge($this->points, $points);
- }
- /**
- * Adds an array of x labels to the internal labels array
- *
- * @param array $labels The array of x labels to add
- */
- public function add_x_labels($labels)
- {
- $this->x_labels = array_merge($this->x_labels, $labels);
- }
- /**
- * Sets a bottom label
- *
- * @param string $label The bottom label to set
- */
- public function set_bottom_label($label)
- {
- $this->bottom_label = $label;
- }
- /**
- * Renders the graph to memory
- *
- */
- public function render()
- {
- // Get our max's and min's
- $asorted = $this->points;
- sort($asorted, SORT_NUMERIC);
- $min = $asorted[0];
- $max = $asorted[count($asorted)-1];
- // Scale based on how many points we need to shove into 930 pixels of width
- $x_delta = $this->inside_width/count($this->points);
- // Scale our y axis to 220 pixels
- $y_scale_factor = ($max-$min)/$this->inside_height;
- // Get our Y initial
- $y_initial = $this->inside_y+$this->inside_height;
- // Get our scale for finding our points of reference to place our x axis labels
- $x_label_scale = ceil(count($this->points)/20);
- $x_label_points = array();
- $next_y_scaled = 0;
- foreach($this->points as $x => $y)
- {
- if(($x_label_scale == 0 || (($x+1) % $x_label_scale) == 0) && $x != 0)
- {
- $x_label_points[] = $x;
- imagedashedline($this->im, $this->inside_x+($x_delta*$x), 30, $this->inside_x+($x_delta*$x), $y_initial, $this->color(185, 185, 185));
- imagefilledellipse($this->im, $this->inside_x+($x_delta*$x), $y_initial-$next_y_scaled+0.5, 8, 8, $this->color(84, 92, 209));
- }
- // Look ahead to find our next point, if there is one
- if(!array_key_exists($x+1, $this->points))
- {
- break;
- }
- $next_y = $this->points[$x+1];
- if($y_scale_factor == 0)
- {
- $y_scaled = $next_y_scaled = 0;
- }
- else
- {
- $y_scaled = ($y-$min)/$y_scale_factor;
- $next_y_scaled = ($next_y-$min)/$y_scale_factor;
- }
- // Draw our line
- $this->imagelinethick($this->inside_x+($x_delta*$x), $y_initial-$y_scaled, $this->inside_x+($x_delta*($x+1)), $y_initial-$next_y_scaled, $this->color(84, 92, 209), 3);
- }
- // Draw our x labels
- foreach($x_label_points as $x)
- {
- $label = $this->x_labels[$x];
- $text_width = imagefontwidth(2)*strlen($label);
- $x = $this->inside_x+($x_delta*$x)-($text_width/2);
- imagestring($this->im, 2, $x, $y_initial+5, $label, $this->color(0, 0, 0));
- }
- // Draw our bottom label
- imagestring($this->im, 2, ($this->img_width / 2), $y_initial+25, $this->bottom_label, $this->color(0, 0, 0));
- if($max > 4)
- {
- // Draw our y labels
- for($i = 1; $i < 4; ++$i)
- {
- $y_value = $this->inside_y+(($this->inside_height/4)*$i);
- imagestring($this->im, 2, 5, $y_value-7, my_number_format(round($min+(($max-$min)/4)*(4-$i))), $this->color(0, 0, 0));
- }
- }
- imagestring($this->im, 2, 5, $this->inside_y+$this->inside_height-7, my_number_format($min), $this->color(0, 0, 0));
- imagestring($this->im, 2, 5, $this->inside_y-7, my_number_format($max), $this->color(0, 0, 0));
- }
- /**
- * Outputs the graph to the screen in PNG format
- *
- */
- public function output()
- {
- // Output the image
- header("Content-type: image/png");
- imagepng($this->im);
- imagedestroy($this->im);
- exit;
- }
- }