Php/GdClock
From Php-Classes
[edit] an Ajax clock using GD
- this is a simple class using GD graphic library
- you need to copy an rgb.txt file from linux system to make this script work. Just copy to current directory.
- demo and files : http://php.classes.free.fr/php/gd/
- there is some problems rendering this class source in wiki format. Don't know how to achieve.
[edit] Source Code
<?php
class ColorRGB{
protected $colors;
public function __construct($file='rgb.txt'){
if(!file_exists($file))
throw new Exception("RGB file not found ($file)");
$this->load_rgb_file($file);
}
protected function load_rgb_file($file){
$lines = split("\n", file_get_contents($file));
$this->colors = array();
foreach($lines as $line){
if($line == )
continue;
if($line[0] == '!')
continue;
$list = preg_split('/\s+/', $line);
$name = strtolower($list[3]);
$this->colors[$name] = array($list[0], $list[1], $list[2]);
}
}
public function get($name){
if(isset($this->colors[$name]))
return $this->colors[$name];
return false;
}
}
class GdImage{
protected $w;
protected $h;
protected $img;
protected $colors;
protected $colorsRGB;
public function __construct($w=500, $h=500){
$this->w = $w;
$this->h = $h;
$this->colorsRGB = new ColorRGB();
$this->create();
}
public function create(){
$this->img = imagecreatetruecolor($this->w, $this->h);
$this->filledRectangle(0, 0, $this->w, $this->h, $this->color(255,255,255));
$this->Rectangle(0, 0, $this->w-1, $this->h-1, $this->color(0,0,0));
}
public function display(){
if(!headers_sent($file, $line)){
header ("Content-type: image/png");
$this->header_no_cache();
imagepng($this->img);
}
else
echo "erreur ; affichage image impossible !\n";
}
public function filledRectangle($x, $y, $w, $h, $color){
imageFilledRectangle($this->img, $x, $y, $w, $h, $color);
}
public function rectangle($x, $y, $w, $h, $color){
imageRectangle($this->img, $x, $y, $w, $h, $color);
}
public function filledCircle($x, $y, $w, $color){
imageFilledEllipse($this->img, $x, $y, $w, $w, $color);
}
public function line($x1, $y1, $x2, $y2, $color){
imageLine($this->img, $x1, $y1, $x2, $y2, $color);
}
public function color($r,$v,$b, $alpha=null){
if($alpha == null)
return imagecolorallocate($this->img, $r, $v, $b);
else
return imagecolorallocatealpha($this->img, $r, $v, $b, $alpha);
}
public function line_width($w){
imagesetthickness($this->img, $w);
}
public function set_antialias($bool=true){
if(function_exists('imageantialias'))
imageantialias($this->img, $bool);
}
public function header_no_cache(){
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
}
public function color_named($name, $alpha=null){
$rgb = $this->colorsRGB->get($name);
if($rgb == false)
return $this->color(0,0,0,$alpha);
return $this->color($rgb[0], $rgb[1], $rgb[2] ,$alpha);
}
public function get_arg($name, $default=false){
if(isset($_GET[$name]))
return $_GET[$name];
return $default;
}
}
class Clock extends GdImage{
protected $width;
protected $center;
protected $border;
protected $radius;
public function __construct($width, $border=10){
parent::__construct($width, $width);
$this->set_antialias();
$this->width = $width;
$this->center = intval($width/2);
$this->border = $border;
$this->radius = $this->center;
$this->draw();
}
public function draw(){
$this->filledRectangle(
1, 1, $this->width - 1, $this->width - 1,
$color=$this->color_named('lightblue', $alpha=80));
$this->filledCircle(
$this->center, $this->center,
$this->width-2*$this->border,
$color=$this->color_named('pink', $alpha=50));
$color = $this->color_named('black', 50);
$this->line_width(1);
for($i=0 ; $i<60 ; $i++)
$this->draw_ticks($this->radius - $this->border, 3, $i*6, $color);
$this->line_width(2);
for($i=0 ; $i<12 ; $i++)
$this->draw_ticks($this->radius - $this->border, 8, $i*30, $color);
$color = $this->color_named('black', 40);
# seconds :
$time = time();
$sec = $time % 60;
$min = date('i', $time);
$hour = date('h', $time);
# seconds
$angle = intval(6 * ($sec));
$this->line_width(1);
$this->draw_hand_line(intval($this->radius * 0.85), $angle, $color);
# minutes :
$angle = intval(6 * ($min));
$this->line_width(2);
$this->draw_hand_line(intval($this->radius * 0.70), $angle, $color);
# hours :
$angle = intval($hour * 360/12 + $min * 12/30);
$this->line_width(3);
$this->draw_hand_line(intval($this->radius * 0.50), $angle, $color);
}
protected function draw_hand_line($radius, $angle, $color){
$angle = (180 - $angle) * pi() / 180;
$x1 = $y1 = $this->center;
$x2 = intval($x1 + sin($angle) * $radius);
$y2 = intval($y1 + cos($angle) * $radius);
$this->line($x1, $y1, $x2, $y2, $color);
}
protected function draw_ticks($radius, $size, $angle, $color){
$angle = (180 - $angle) * pi() / 180;
$x1 = $y1 = $this->center;
$x2 = intval($x1 + sin($angle) * $radius);
$y2 = intval($y1 + cos($angle) * $radius);
$x1 = intval($x1 + sin($angle) * ($radius-$size));
$y1 = intval($y1 + cos($angle) * ($radius-$size));
$this->line($x1, $y1, $x2, $y2, $color);
}
public function display(){
if($this->get_arg('action') == 'display')
parent::display();
else
$this->html();
}
public function html(){
echo <<<END
<html>
<script>
var clock;
var imgBase="?action=display&count="
var c = 0;
function count()
{
c++;
webcamimage = document.getElementById("clock");
webcamimage.src=imgBase + c;
}
function init()
{
webcamimage = document.getElementById("clock");
if( webcamimage )
{
setInterval("count()",1000);
}
}
window.onload = init;
</script>
<body>
Ajax Clock with GD
<img src="clock.php" name="image" id="clock">
</body> </html> END; } } $clock = new Clock(200); $clock->display();
?>
[edit] Links
- demo here : http://php.classes.free.fr/php/gd/
