Version: 1.0
Type: Function
Category: Graphics
License: GNU General Public License
Description: it is an example of a classroom that allows to create bar charts 3D, the data can be gotten through a table
<?php
header("Content-type: image/png");
class GraficoBarras{
var $num_barras, $max_val, $inc_horiz, $inc_vert, $inc3D, $incV;
var $imag, $EscHorizontal, $width, $height, $estilo;
var $arr_data, $arr_nomes, $arr_y, $y_max;
var $cor_de_fundo, $cor_do_titulo, $cor_de_linhas, $cores, $dark_cores, $preto, $cor_letras;
function GraficoBarras($num=3, $larg=400, $alt=300, $estilo){
$this->num_barras = $num;
$this->inc_horiz = (380-30)/$this->num_barras;
$this->EscHorizontal = 0;
$this->width = $larg;
$this->height = $alt;
$this->y_max = 300;
$this->estilo = $estilo;
$this->arr_data = array();
$this->arr_nomes = array();
$this->arr_y = array();
$this->imag = @imagecreatetruecolor($larg, $alt) or die("Cannot Initialize new GD image stream");
$estilo = ($estilo == "") ? 'Classico' : $estilo;
switch($estilo){
case 'Classico': $this->cor_do_fundo = imagecolorallocate($this->imag, 0xC1, 0xC7, 0xCC);
break;
case 'Feminista': $this->cor_do_fundo = imagecolorallocate($this->imag, 0xFF, 0xB3, 0xB3);
break;
case 'Moderno': $this->cor_do_fundo = imagecolorallocate($this->imag, 0x8C, 0xBA, 0xDE);
break;
}
$this->cores = array("0" => imagecolorallocate($this->imag, 0xFF, 0x00, 0x00), //red
"1" => imagecolorallocate($this->imag, 0x00, 0xFF, 0x00), //green
"2" => imagecolorallocate($this->imag, 0x00, 0x00, 0xFF), //blue
"3" => imagecolorallocate($this->imag, 0xFF, 0xFF, 0x00), //yellow
"4" => imagecolorallocate($this->imag, 0xFF, 0x00, 0xFF), //purple
"5" => imagecolorallocate($this->imag, 0x00, 0xFF, 0xFF), //cyan
"6" => imagecolorallocate($this->imag, 255, 165, 0)); //orange
$this->dark_cores = array( "0" => imagecolorallocate($this->imag, 0x90, 0x00, 0x00),
"1" => imagecolorallocate($this->imag, 0x00, 0x90, 0x00),
"2" => imagecolorallocate($this->imag, 0x00, 0x00, 0x90),
"3" => imagecolorallocate($this->imag, 0x90, 0x90, 0x00),
"4" => imagecolorallocate($this->imag, 0x90, 0x00, 0x90),
"5" => imagecolorallocate($this->imag, 0x00, 0x90, 0x90),
"6" => imagecolorallocate($this->imag, 190, 100, 0));
$this->preto = imagecolorallocate($this->imag, 0, 0, 0);
imagefill($this->imag, 0, 0, $this->cor_do_fundo);
imagerectangle ($this->imag, 0, 0, $larg-1, $alt-1, $this->preto);
}
function adicionarTituloGrafico($titulo){
$this->cor_titulo = imagecolorallocate($this->imag, 255, 255, 255);
$corRect = imagecolorallocate($this->imag, 0, 0x3F, 0x7D);
$x2 = $this->width-2;
$y2 = 20;
imagefilledrectangle ($this->imag, 1, 1, $x2, $y2, $corRect);
imagestring($this->imag, 5, 4, 3, ':: '.$titulo, $this->cor_titulo);
imageline ($this->imag, 0, $y2+1, $x2, $y2+1, $this->preto);
imagestring($this->imag, 5, 4, 3, ':: '.$titulo, $this->cor_titulo);
}
function desenhaExterior(){
$this->inc3D = (60/$this->num_barras);
$this->inc3D = ($this->inc3D < 20) ? $this->inc3D : 20;
$this->inc3D = ($this->inc3D > 5) ? $this->inc3D : 5;
$inc3D = $this->inc3D;
$this->cor_de_linhas = imagecolorallocate($this->imag, 0, 0, 0);
$grey = imagecolorallocate($this->imag, 180, 180, 180);
$dark_grey = imagecolorallocate($this->imag, 120, 120, 120);
imagefilledrectangle ( $this->imag, 30+$inc3D, 30, 380+$inc3D, $this->y_max-$inc3D, $grey);
$values = array(0=>30, 1=>$this->y_max, 2=>380, 3=>$this->y_max,
4=>380+$inc3D, 5=>$this->y_max-$inc3D, 6=>30+$inc3D, 7=>$this->y_max-$inc3D, 8=>30, 9=>$this->y_max);
imagefilledpolygon($this->imag, $values, 5, $dark_grey );
$values = array(0=>30, 1=>$this->y_max, 2=>30+$inc3D, 3=>$this->y_max-$inc3D,
4=>30+$inc3D, 5=>30, 6=>30, 7=>30+$inc3D, 8=>30, 9=>$this->y_max);
imagefilledpolygon($this->imag, $values, 5, $grey);
imageline($this->imag, 30, 30+$inc3D, 30, $this->y_max + 3, $this->cor_de_linhas); //barra vertical
imageline($this->imag, 30, $this->y_max, 380, $this->y_max, $this->cor_de_linhas); //barra horizontal
imageline($this->imag, 30+$inc3D, 30, 30+$inc3D, $this->y_max-$inc3D, $this->preto); // barra cinzenta
}
function desenhaEscVertical($val){
if ($val < 10){ $posx = 8; }
else if ($val >= 10 && $val < 20){ $posx = 6; }
else{ $posx = 4; }
$inc3D = $this->inc3D;
$val = ($val > 10) ? 10 : $val;
if ($val == 0)
return;
$this->inc_vert = ($this->y_max-60)/$val;
$k=0;
$inc = ($this->max_val / $val);
for ($n=$this->y_max, $a=0; $n>30; $n = $n-$this->inc_vert, $a++){
if ($n > 50){
imageline($this->imag, 28, $n, 30, $n, $this->cor_de_linhas); //_ horizontal
imageline($this->imag, 30, $n, 30+$inc3D, $n-$inc3D, $this->cor_de_linhas); //obliqua
}
if ($n-6 > 30)
imagestring($this->imag, 2, $posx, $n-6, round($k, 1), $this->cor_de_linhas);
if ($n-$inc3D > 30)
imageline($this->imag, 30+$inc3D, $n-$inc3D, 380+$inc3D, $n-$inc3D, $this->cor_de_linhas); //horizontal
if ($a < 2) $this->arr_y[$a] = $n-$inc3D;
$k = $k + $inc;
}$this->incV = ($this->arr_y[1]-$this->arr_y[0])/$inc;
}
function desenhaEscHorizontal(){ $this->EscHorizontal = 1; }
function setMaxValor($valor) { $this->max_val = $valor; }
function destroy(){ imagedestroy($this->imag); }
function addDados($dado){ array_push($this->arr_data, $dado); }
function addNomes($dado){ array_push($this->arr_nomes, $dado); }
function criaGrafico(){
$inc = $this->inc_horiz-5;
$max = 255;
$min = 0;
$inc3D = $this->inc3D;
if ($this->num_barras <= 4) $incX = 55;
else if ($this->num_barras > 4 && $this->num_barras <= 8) $incX = 45;
else $incX = 40;
srand((double)microtime()*1000000);
for ($n=0; $n<count($this->arr_data); $n++){
$y_value = ($this->arr_data[$n] == $this->max_val) ? 240 : abs($this->incV * $this->arr_data[$n]);
$y1 = $this->y_max - $y_value;
$x1 = ($incX+($inc)*$n+(4*$n));
switch($incX){
case 55: $x2 = (15+($inc*($n+1))+(4*$n));
break;
case 45: $x2 = (25+($inc*($n+1))+(4*$n));
break;
default:
$x2 = (25+($inc*($n+1))+(4*$n))+ 3;
}
$y2=$this->y_max-1;
// ---- faz o efeito 3D do grafico ----
$values_lado = array(0=>$x2+$inc3D, 1=>$y2-$inc3D+1, 2=>$x2+$inc3D, 3=>$y1-$inc3D,
4=>$x2, 5=>$y1, 6=>$x2, 7=>$y2, 8=>$x2+$inc3D, 9=>$y2-$inc3D+1);
$values_cima = array(0=>$x2, 1=>$y1, 2=>$x2+$inc3D, 3=>$y1-$inc3D,
4=>$x1+$inc3D-1, 5=>$y1-$inc3D, 6=>$x1-1, 7=>$y1, 8=>$x2, 9=>$y1);
if ($n + 1 > count($this->cores)){
$r = rand(100, 255);
$g = rand(100, 255);
$b = rand(100, 255);
$cor = imagecolorallocate($this->imag, $r, $g, $b);
$dark_cor = imagecolorallocate($this->imag, $r-100, $g-100, $b-100);
array_push($this->cores, $cor);
array_push($this->dark_cores, $dark_cor);
}
imagefilledrectangle($this->imag, $x1, $y1, $x2, $y2, $this->cores[$n]); //desenha parte frente
imagefilledpolygon($this->imag, $values_lado, 5, $this->dark_cores[$n]); //parte lado
imagefilledpolygon($this->imag, $values_cima, 5, $this->dark_cores[$n]); //parte cima grafico
imageline($this->imag, $x1+$inc3D-1, $y1-$inc3D, $x1-1, $y1, $this->cor_de_linhas); //linha1 obl1
imageline($this->imag, $x2+$inc3D, $y1-$inc3D, $x2, $y1, $this->cor_de_linhas); //linha1 obl2
imageline($this->imag, $x1+$inc3D-1, $y1-$inc3D, $x2+$inc3D, $y1-$inc3D, $this->cor_de_linhas); //linha1 hor
if ($this->EscHorizontal == 1)
imageline($this->imag, $x2+$inc3D+3, $this->y_max, $x2+$inc3D+3, $this->y_max+3, $this->cor_de_linhas); //linha separadora vertical
if ($this->arr_data[$n] != 0){
imageline($this->imag, $x2+$inc3D, $y1-$inc3D+1, $x2+$inc3D, $y2-$inc3D+1, $this->cor_de_linhas); //linha1 vert
}
imageline($this->imag, $x2+$inc3D, $y2-$inc3D+1, $x2, $y2+1, $this->cor_de_linhas); //linha1 obl3
imagerectangle($this->imag, $x1-1, $y1, $x2, $y2+1, $this->preto); //desenha o bordo do rectangulo
}
}
function desenhaGrafico(){
imagepng($this->imag);
imagedestroy($this->imag);
}
function guardaGrafico($img){
imagepng($this->imag, $img);
imagedestroy($this->imag);
}
function criaLegenda(){
$this->cor_letras = imagecolorallocate($this->imag, 0, 0, 0);
$cor_legenda = imagecolorallocate($this->imag, 255, 255, 204);
imagestring ($this->imag, 3, 10, 315, "Legenda:", $this->dark_cores[2]);
$inc=10;
$x1=10; $y1=330;
$x2 = $this->width-11;
$y2=$y1+(20.1*$this->num_barras);
imagerectangle($this->imag, $x1, $y1, $x2, $y2, $this->dark_cores[2]); //caixa envolvente
imagefilledrectangle($this->imag, $x1+1, $y1+1, $x2-1, $y2-1, $cor_legenda);
$x1+=10;
for ($a=0, $k=5; $a<$this->num_barras; $a++, $k+=20){
imagefilledrectangle($this->imag, $x1, $y1+$k, $x1+$inc, $y1+$k+$inc, $this->cores[$a]);
imagerectangle($this->imag, $x1-1, $y1+$k-1, $x1+$inc+1, $y1+$k+$inc+1, $this->preto);
imagestring ( $this->imag, 3, 38, $y1+$k-1, $this->arr_nomes[$a], $this->cor_letras);
}
}
}
// ------------- criar o grafico -------------
$maior = 100; // maior valor
$titulo = "Perguntas por tipo";
$gbarras = new GraficoBarras(3, 420, 400, $estilo_s);
$gbarras->adicionarTituloGrafico($titulo);
$gbarras->setmaxvalor($maior);
$gbarras->desenhaExterior();
$gbarras->desenhaEscVertical($maior);
$gbarras->desenhaEscHorizontal();
$gbarras->addDados(100);
$gbarras->addNomes("Benfica");
$gbarras->addDados(75);
$gbarras->addNomes("Porto MFC");
$gbarras->addDados(50);
$gbarras->addNomes("Juveo Gay");
$gbarras->criaGrafico();
$gbarras->criaLegenda();
$gbarras->desenhaGrafico();
?>
