"; print_r($data); print ""; # die; # $last_max_value = $max_value; if(count($data) < $period) $min_value = 0; $total_w = 400; $total_h = 200; ### determine y autoscale (nearest order of magnitude units) $range = $max_value - $min_value; $range = floor( $range / 6 ); $min_value -= $range/2; if($min_value < 0) $min_value = 0; $mag = floor( log10($range) ); $round_nearest = floor($range/pow(10,$mag)) * pow(10,$mag); $x_border = 45; $y_border = 20; $h = $total_h - $y_border; $w = $total_w - $x_border; ### create chart data area $image = imagecreatetruecolor($w, $h); $colors['black'] = imagecolorallocatealpha($image, 0,0,0,0); $colors['white'] = imagecolorallocatealpha($image, 255,255,255,0); $colors['red'] = imagecolorallocatealpha($image, 255,0,0,0); $colors['green'] = imagecolorallocatealpha($image, 0,255,0,0); $colors['blue'] = imagecolorallocatealpha($image, 0,0,255,64); $colors['b_blue'] = imagecolorallocatealpha($image, 0,0,255,0); $colors['grey'] = imagecolorallocatealpha($image, 204,204,204,0); ### chart background color imagefilledrectangle($image, 0, 0, $w-1, $h-1, $colors['white']); # make best fit with spacing $bar_spacing = 4; #minimum $bar_width = floor( ($w - $period*$bar_spacing*2 ) / ($period) ); $bar_spacing += floor(($w - (($bar_width + $bar_spacing) * $period )) / $period); $min = floor($min_value/$round_nearest)*$round_nearest; $max = ceil($max_value/$round_nearest)*$round_nearest; $y_pixel = ($max - $min) / ($h); $time = strtotime($first); $last_time = strtotime($last); #print "$first $time $last $last_time
";
### draw horizontal grid lines
$lines = ($max - $min)/$round_nearest;
for($i = 0; $i <= $lines; $i++) {
$y = $h/$lines*$i;
imageline($image, 0, $y, $w, $y, $colors['grey']);
imageline($image, 0, $y, 4, $y, $colors['black']);
imageline($image, $w, $y, $w-5, $y, $colors['black']);
}
### draw goal lines
foreach ($goals as $v1) {
$y1 = convertValueToY($y_pixel, $min, $h, $v1);
imageline($image, 1, $y1, $w-1, $y1, $colors['red']);
}
$o_date = "";
$advance = 1;
if($unit == 'days') $advance = 24;
for ($i = 0; $i <= $period ; $i++) {
$x = $period - $i;
if($unit == 'days') $key = date('Y-m-d', $last_time - $x*3600*$advance);
else $key = date('Y-m-d H:00', $last_time - $x*3600*$advance);
$date = date('Y-m-d', $last_time - $x*3600*$advance);
if($o_date == "") $o_date = $date;
$v1 = $data[$key];
#print "$x $last_time $date $key $v1 $y1
";
$y1 = convertValueToY($y_pixel, $min, $h, $v1);
$x2 = $w - $bar_spacing/2+1 - ($bar_width + $bar_spacing) * $x;
$x1 = $x2 - $bar_width;
imagefilledrectangle($image, $x1, $h-1, $x2, $y1, $colors['blue']);
imagerectangle($image, $x1, $h-1, $x2, $y1, $colors['b_blue']);
### new days are separated by a black vertical line, otherwise it's grey
$line_color = $colors['grey'];
if($o_date != $date) $line_color = $colors['black'];
imageline($image, $x1- $bar_spacing/2, $h-1, $x1- $bar_spacing/2, 1,$line_color);
$o_date = $date;
}
### black border around chart data area
imagerectangle($image, 0, 0, $w-1, $h-1, $colors['black']);
$f_w = $w+$x_border*2;
$f_h = $h+$y_border*2;
### create "whole" image
$f_image = imagecreatetruecolor($f_w, $f_h);
$f_colors['black'] = imagecolorallocatealpha($f_image, 0,0,0,0);
$f_colors['white'] = imagecolorallocatealpha($f_image, 255,255,255,0);
$f_colors['red'] = imagecolorallocatealpha($f_image, 255,0,0,0);
$f_colors['green'] = imagecolorallocatealpha($f_image, 0,255,0,0);
$f_colors['blue'] = imagecolorallocatealpha($f_image, 0,0,255,0);
$f_colors['grey'] = imagecolorallocatealpha($f_image, 204,204,204,0);
### make background white
imagefilledrectangle($f_image, 0, 0, $f_w, $f_h, $f_colors['white']);
### stick chart into image
imagecopymerge($f_image, $image, $x_border, $y_border, 0, 0, $w, $h, 100);
### "cool" dropshadow around chart
imageline($f_image, $x_border+2, $f_h-$y_border, $x_border+$w, $f_h-$y_border, $f_colors['grey']);
imageline($f_image, $x_border+$w, $y_border+2, $x_border+$w, $y_border+$h, $f_colors['grey']);
### add Y labels on left and right
for($i = 0; $i <= $lines; $i++) {
$y = $h/$lines * $i;
if($round_nearest >= 1000) {
$lval = sprintf("%4dK", ($max - $round_nearest*$i)/1000);
$rval = sprintf("%-4dK", ($max - $round_nearest*$i)/1000);
}
else if($round_nearest >= 100) {
$lval = $rval = sprintf("%5.1fK", ($max - $round_nearest*$i)/1000);
}
else if($round_nearest >= 10) {
$lval = $rval = sprintf("%6.2fK", ($max - $round_nearest*$i)/1000);
}
else {
$lval = $rval = sprintf("%7.3fK", ($max - $round_nearest*$i)/1000);
}
imagettftext($f_image, $font_size, 0, 4, $y_border+$y+4, $f_colors['black'], $font, $lval);
imagettftext($f_image, $font_size, 0, $f_w-$x_border+2, $y_border+$y+4, $f_colors['black'], $font, $rval);
}
### add chart title
$title = "Wasteland 2 Kickstarter Progress";
imagettftext($f_image, $font_size, 0, $x_border+2, $y_border-5, $f_colors['red'], $font, $title);
### add subtitle
$m_x = strlen($title) * $font_size;
$m_x -= 50;
$money = number_format($last_max_value);
imagettftext($f_image, $font_size, 0, $x_border+2 + $m_x + 2, $y_border-5, $f_colors['blue'], $font, "\$$money [last $period $unit $measure]");
### add X labels
$font_size -= 2;
for ($i = 1; $i <= $period ; $i++) {
$x = $period - $i;
if($unit == 'days') $hr = date('M d', $last_time - $x*3600*$advance);
else $hr = date('H:00', $last_time - $x*3600*$advance);
$len = strlen($hr) * $font_size;
$m_x=0;
$x2 = $w - $bar_spacing/2+1 - ($bar_width + $bar_spacing) * $x;
$x1 = $x2 - $bar_width;
imagettftext($f_image, $font_size, 0, $x1+$x_border+$m_x, $f_h - 5 - 3 , $f_colors['black'], $font, $hr);
}
header("Content-Type: image/png");
imagesavealpha($f_image, true);
imagepng($f_image);
function convertValueToY($y_pixel, $min, $h, $value) {
$value -= $min;
$value /= $y_pixel;
$value = $h-$value;
return $value;
}
?>