用Flash图形化数据二 -pc6资讯

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用Flash图形化数据二 时间：2004/11/7 3:27:00来源：本站整理作者：蓝点我要评论(0): 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。

// 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();

?>

type="application/x-shockwave-flash" width=600 height=300>



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
        // 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;

            $end = $end + $val*360;

        }

        // function call to add slice

        $objID = 1+$i*10;

        $this->show_slice($i, $objID, $begin, $end);

        // put together percent array for all labels

        $this->percents[$i] = round($values[$i]/$sum*100);

    }



}  //end flash_pie

function show_slice($i, $objID, $begin, $end) {

    // draws a slice and places it in our frame

    swf_addcolor($this->r_arr[$i], $this->g_arr[$i], $this->b_arr[$i], 1);

    swf_startshape($objID);

    swf_shapefillsolid(0, 0, 0, 1);

    swf_shapearc(0, 0, 100, $begin, $end);

    swf_shapecurveto(0, 0, 0, 0);

    swf_endshape($objID);

    swf_pushmatrix();

    swf_placeobject($objID, 1);

    swf_popmatrix();

    swf_showframe();

}

function pie_legend($labels) {

    // draws the legend and labels and places it in our frame

    for ($i=0; $i
        swf_addcolor($this->r_arr[$i], $this->g_arr[$i], $this->b_arr[$i], 1);

        swf_definerect($i+1000, 1, 0, 20, 20, 0);

        if ($i == 0) {

            swf_translate(120, 75, 0);

        } else {

            swf_translate(0, 20, 0);

        }

        swf_placeobject($i+1000, 1);

        swf_translate(0, 5, 0);

        unset($label);

        $label = $labels[$i];

        $label .= " (";

        $label .= $this->percents[$i];

        $label .= " percent)";

        if ($i==0) {

            $width = (swf_textwidth($label)/4)+30;

        } else {

            $width = round(swf_textwidth($label)/2)+30;

        }

        $this->pie_text($i-1000, "$label", 15, $width, 0);

        swf_translate(-$width, 0, 0);

    }

    swf_translate($width, 30*count($labels), 0);

}

function pie_text($id, $text, $size, $x, $y) {

    // simple function to draw text ($text) at ($x,$y) with font size ($size)

    // set color of text to black

    swf_addcolor(0,0,0,0);

    // set font size and slant

    swf_fontsize($size);

    swf_fontslant(0);

    // define, position and place text in frame

    swf_definetext($id, "$text", 1);

    swf_translate($x, $y, 0);

    swf_placeobject($id, 1);

}

function pie_title($text, $size) {

    // simple function to draw title and set lineup

    // $text should not exceed about 25 characters

    $this->pie_text(99, $text, $size, 0, 150);

    swf_translate(0, -300, 0);

}

function show() {

    // show the frame

    swf_showframe();

}

function close() {

    // flush our buffer and return movie

    $data = swf_closefile(1);

}

} // end class flash_pie

?>

    注意，你可以将生成的SWF文件直接返回到浏览器中，而不必一定要像我一样把它写到一个文件中。这可能对测试来说是有用的，但你可能很少用到一个Flash文件，更多的时候你可能想把Flash文件嵌入到HTML文档中。如果你选择直接把Flash文件输出到浏览器中，你可以如下设置header content 类型：

   header("Content-type: application/x-shockwave-flash")

并把swf_openfile(filename",...)改成swf_openfile("php://stdout",...)

更多信息的链接：

    http://www.php.net/manual/ref.swf.php  关于swf_* PHP函数的说明

    http://reality.sgi.com/grafica/flash/  下载PHP的swf库

    http://openswf.org                     更多Flash工具和信息

    http://www.macromedia.com/software/flash/open/licensing/

                                           关于Macromedia Flash SDK的更多信息

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