用Flash图形化数据(二)

来源：Linuxdby.com 作者：Webmaster 时间：2007-06-01 点击： [收藏] [投稿]

让我们烤点甜饼（做饼图）
　　成功地安装了PHP地Shockwave Flash支持后,就可以用PHP创建Shockwave文件了。学习的最好方法就是直接跳到程序去，所以下面就让我们看看程序。第一个文件包括怎样使用类的示例代码，同时也显示了如何将一个Flash文件嵌入到HTML文档中。

<?php

// include class needed for flash graph
include("class.pie.flash.php");

mysql_connect ("localhost", "root", "");

$query = "SELECT DISTINCT city_name, COUNT(city_id)
    FROM city
    GROUP BY city_name;";

$result = mysql_db_query ("hermes",$query);

while ($row = mysql_fetch_array ($result)) {
    $city_counts[] = $row["COUNT(city_id)"];
    $city_names[] = $row["city_name"];
}

mysql_free_result ($result);

// Instantiate new object
$graph = new flash_pie($city_counts, "city.swf");

// set graph title (should not exceed about 25 characters)
$graph->pie_title("City Results", 30);

// set graph legend
$graph->pie_legend($city_names);

// show graph
$graph->show();

// free resources
$graph->close();

?>

<html>
<head>
<meta http=equiv="Expires" content="Fri, Jun 12 1981 08:20:00 GMT">
<meta http=equiv="Pragma" content="no-cache">
<meta http=equiv="Cache-Control" content="no-cache">
<meta http=equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor=white>
<div align=center>
<embed src="city.swf" quality=high loop=false pluginspage="http://www.macromedia.com/
shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"
type="application/x-shockwave-flash" width=600 height=300></embed>
</div>
</body>
</html>

<?php

class flash_pie {

// class variables

// setup some global colors
var $r_arr = array(0.1,  1, 0, 1, 0, 1, 0.388235294, 0.4, 0.388235294, 0.929411765);
var $g_arr = array(1,    0, 0, 1, 1, 0, 0.8,         0.4, 0.8,         0.439215686);
var $b_arr = array(0.25, 0, 1, 0, 1, 1, 1,           0.4, 1,           0.043137255);

var $percents;

function flash_pie($values, $this_file) { //begin constructor
    // to write out code directly to browser, set content header and use "php://stdout"
    //swf_openfile ("php://stdout", 700, 250, 30, 1, 1, 1);
    //header("Content-type: application/x-shockwave-flash");

    swf_openfile ($this_file, 1000, 450, 30, 1, 1, 1);

    // set up viewport for flash movie
    swf_ortho2 (-400, 300 , -90, 250);

    // choose the font we will use for pie graph
    swf_definefont(10, "Mod");

    // get sum of array for percents/slices
    while(list($key,$val) = each($values)) {
        $sum = $sum + $val;
    }

    for ($i=0; $i<count($values); $i++) {
        // calculate how big they need to be and then
        // draw all of our slices
        if ($i == 0) {
            // setup parameters for first slice
            $begin = 0;
            $val = $values[$i]/$sum;
            $end = $val*360;
            swf_translate(-200, 0, 0);
        } else {
            // setup parameters for every other slice
            $begin = $end;
            $val = $values[$i]/$sum;

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