用Flash图形化数据(二)
author:一佰互联 2019-05-01   click:193
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;             $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; $i<count($labels); $i++) {         swf_addcolor($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