<?php
require_once dirname(__FILE__) . "/class.graph.php";
class BarGraph extends CGraph {
var $bar_width = 32;
var $bar_height = 8;
var $bar_padding = 5;
var $bar_bordercolor = array(39, 78, 120);
var $bar_bgcolor = array(69, 129, 194);
var $bar_textfont = 2;
function BarGraph() {
$this->axis_deepness = $this->bar_height;
$this->graph_height = $this->graph_padding['top'] + $this->graph_areaheight + $this->graph_padding['bottom'];
}
/**
* Graph::SetBarBorderColor()
* Sets border color for bars
**/
function SetBarBorderColor($red, $green, $blue) {
$this->bar_bordercolor = array($red, $green, $blue);
}
/**
* Graph::SetBarBackgroundColor()
* Sets background color for bars
**/
function SetBarBackgroundColor($red, $green, $blue) {
$this->bar_bgcolor = array($red, $green, $blue);
}
/**
* Graph::SetBarDimensions()
* Sets with and height of each bar
**/
function SetBarDimensions($width, $height) {
if ($width > 0) $this->bar_width = $width;
if ($height >= 0) {
$this->bar_height = $height;
$this->axis_deepness = $height;
}
}
/**
* Graph::SetBarPadding()
* Sets padding (border) around each bar
**/
function SetBarPadding($padding) {
if ($padding > 0) $this->bar_padding = $padding;
}
function SetBarFont($font) {
$this->bar_textfont = 0;
switch ($font) {
case 'x-large': $this->bar_textfont++;
case 'large': $this->bar_textfont++;
case 'medium': $this->bar_textfont++;
case 'small': $this->bar_textfont++;
case 'x-small': $this->bar_textfont++; break;
default:
$this->bar_textfont = $font;
}
}
function DrawGraph($file = "") {
$this->graph_width = $this->graph_padding['left'] +
(count($this->data) * ($this->bar_width + ($this->bar_padding * 2))) +
$this->graph_padding['right'];
$this->axis_deepness = $this->bar_height;
$this->im = imagecreatetruecolor($this->graph_width, $this->graph_height);
$this->axis_frontgridlines = 0;
$this->axis_xscalevisible = 0;
$this->axis_positions = array($this->axis_positions[0], 0, 0, 0);
CGraph::DrawGraph();
if ($this->axis_minY > 0) $this->axis_minY = 0;
if ($this->axis_maxY < 0) $this->axis_maxY = 0;
$this->__Draw_LeftBottom_Axis();
$p = 0;
foreach ($this->data as $name => $value) {
$p++;
$this->__DrawBarText($p, $name);
$this->__DrawBar($p, $value);
}
$this->__Draw_TopRight_Axis();
CGraph::DrawGraph2();
if (strlen($file)) {
$ret = imagepng($this->im, $file);
} else {
header("Content-Type: image/png"); // thanks to Marcin G. :)
imagepng($this->im);
$ret = true;
}
imagedestroy($this->im);
return $ret;
}
/**
* Graph::__DrawBarText()
* Determines top and left to draw text to a choosen bar
**/
function __DrawBarText($bar, $text) {
$this->__DrawText($text,
$this->graph_padding['left'] + (($this->bar_width + ($this->bar_padding * 2)) * ($bar - 0.5)),
$this->graph_height - $this->graph_padding['bottom'] + 1,
$this->im_axis_scalecolor,
$this->bar_textfont,
1);
}
/**
* Graph::__DrawBar()
* Draws a choosen bar with it's value
**/
function __DrawBar($bar, $value) {
$x = $this->graph_padding['left'] +
(($this->bar_width + ($this->bar_padding * 2)) * ($bar - 1)) +
$this->bar_padding;
$y = $this->graph_areaheight / ($this->axis_maxY - $this->axis_minY);
if ($value >= 0) {
$this->____DrawBar($x,
$this->graph_height - $this->graph_padding['bottom'] - abs(floor($this->axis_minY * $y)) - floor($y * $value),
$x + $this->bar_width,
$this->graph_height - $this->graph_padding['bottom'] - abs(floor($this->axis_minY * $y)));
} else {
$this->____DrawBar($x,
$this->graph_height - $this->graph_padding['bottom'] - abs(floor($this->axis_minY * $y)),
$x + $this->bar_width,
$this->graph_height - $this->graph_padding['bottom'] - floor($this->axis_minY * -$y) + floor($y * -$value));
}
}
/**
* Graph::____DrawBar()
* Draws the actual rectangles that form a bar
**/
function ____DrawBar($x1, $y1, $x2, $y2) {
$this->__AllocateColor("im_bar_bordercolor",
$this->bar_bordercolor,
( $this->graph_transparencylevel * 1.5));
$this->__AllocateColor("im_bar_bgcolor",
$this->bar_bgcolor,
( $this->graph_transparencylevel * 1.5));
// base square
$this->__DrawPolygon(array($x1, $y2, $x2, $y2, $x2 + $this->bar_height,
$y2 - $this->bar_height, $x1 + $this->bar_height,
$y2 - $this->bar_height),
$this->im_bar_bgcolor,
true);
$this->__DrawPolygon(array($x1, $y2, $x2, $y2, $x2 + $this->bar_height,
$y2 - $this->bar_height, $x1 + $this->bar_height,
$y2 - $this->bar_height),
$this->im_bar_bordercolor);
// back square
$this->__DrawPolygon(array($x1 + $this->bar_height, $y1 - $this->bar_height,
$x2 + $this->bar_height, $y1 - $this->bar_height,
$x2 + $this->bar_height, $y2 - $this->bar_height,
$x1 + $this->bar_height, $y2 - $this->bar_height),
$this->im_bar_bgcolor,
true);
$this->__DrawPolygon(array($x1 + $this->bar_height, $y1 - $this->bar_height,
$x2 + $this->bar_height, $y1 - $this->bar_height,
$x2 + $this->bar_height, $y2 - $this->bar_height,
$x1 + $this->bar_height, $y2 - $this->bar_height),
$this->im_bar_bordercolor);
// left square
$this->__DrawPolygon(array($x1, $y1, $x1 + $this->bar_height, $y1 - $this->bar_height,
$x1 + $this->bar_height, $y2 - $this->bar_height,
$x1, $y2),
$this->im_bar_bgcolor,
true);
$this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2, $y2, $x1, $y2),
$this->im_bar_bordercolor);
// front square
$this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2, $y2, $x1, $y2),
$this->im_bar_bgcolor,
true);
$this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2, $y2, $x1, $y2),
$this->im_bar_bordercolor);
// right square
$this->__DrawPolygon(array($x2, $y2, $x2, $y1, $x2 + $this->bar_height,
$y1 - $this->bar_height, $x2 + $this->bar_height,
$y2 - $this->bar_height),
$this->im_bar_bgcolor,
true);
$this->__DrawPolygon(array($x2, $y2, $x2, $y1, $x2 + $this->bar_height,
$y1 - $this->bar_height, $x2 + $this->bar_height,
$y2 - $this->bar_height),
$this->im_bar_bordercolor);
// top square
$this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2 + $this->bar_height,
$y1 - $this->bar_height, $x1 + $this->bar_height,
$y1 - $this->bar_height),
$this->im_bar_bgcolor,
true);
$this->__DrawPolygon(array($x1, $y1, $x2, $y1, $x2 + $this->bar_height,
$y1 - $this->bar_height, $x1 + $this->bar_height,
$y1 - $this->bar_height),
$this->im_bar_bordercolor);
}
/**
* Graph::__Load3dbarValues()
* Loads definitions to 3d bar settings
**/
function __Load3dbarValues($data) {
foreach ($data as $name => $value) {
$name = strtolower($name);
switch ($name) {
case 'background-color':
$this->__SetColorToValue("bar_bgcolor", $value);
break;
case 'border-color':
$this->__SetColorToValue("bar_bordercolor", $value);
break;
case 'padding':
$this->bar_padding = $value;
break;
case 'width':
$this->bar_width = (int) $value;
break;
case 'height':
$this->bar_height = (int) $value;
$this->axis_deepness = (int) $value;
break;
}
}
}
}
?>