Develop GUI code examples using PHP

GUI Introduction

Graphical User Interface (GUI for short, also known as Graphical User Interface) refers to a computer operation user interface displayed graphically.

Compared with the command line interface used by early computers, the graphical interface is more visually acceptable to users. However, if this interface wants to prompt the user with "various beautiful but not monotonous visual messages" at specific locations on the display screen for "status changes", it will inevitably require more computing power than simple message presentation.

A simple notepad (can only open files for modification)

<?php
set_time_limit (0);       // 设置运行时间

if (!class_exists ("gtk"))           // 判断是否有GTK模块
    if (strtoupper (substr ($_SERVER["OS"], 0, 3)) == "WIN")
        dl ("php_gtk.dll");
    else 
        dl ("php_gtk.so");

$window = &new GtkWindow ();              // 建一个窗口
$window->set_uposition (100, 100);        //  窗口出现位置
$window->set_usize ((gdk::screen_width()-200), (gdk::screen_height()-150));  // 窗口大小
$window->set_title ("WINDOWS");         // 设置窗口标题
$window->connect_object (&#39;destroy&#39;, array (&#39;gtk&#39;, &#39;main_quit&#39;));     // 注册窗口的事件

$vbox = &new GtkVBox ();           
$hbox = &new GtkHBox ();         
$window->add ($vbox);


$menuBar = &new GtkMenuBar ();               // 创建菜单
$vbox->pack_start ($menuBar, false, false, 0);

$file = &new GtkMenuItem ("File");
$menuBar->append ($file);

$fileMenu = &new GtkMenu ();
$open = &new GtkMenuItem ("Open");
$save = &new GtkMenuItem ("Save");
$line = &new GtkMenuItem ();
$line->set_sensitive (true);
$exit = &new GtkMenuItem ("Exit");
$fileMenu->append ($open);
$open->connect_object (&#39;activate&#39;, &#39;showFileSelection&#39;);        
$fileMenu->append ($save);
$save->connect_object (&#39;activate&#39;, &#39;saveFile&#39;);
$fileMenu->append ($line);
$fileMenu->append ($exit);
$exit->connect_object (&#39;activate&#39;, array (&#39;gtk&#39;, &#39;main_quit&#39;));

$file->set_submenu ($fileMenu);

$scroll = &new GtkScrolledWindow ();
$scroll->set_border_width (8);
$scroll->set_policy (GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
$hbox->pack_start ($scroll, true, true, 0);
$vbox->pack_start ($hbox, true, true, 1);

$text = &new GtkText ();
$text->set_editable (true);
$text->set_word_wrap (true);
$scroll->add ($text);

function showFileSelection ()           // 文件选择函数
{
    $file = &new GtkFileSelection ("File Selection");
    $ok_button = $file->ok_button;
    $ok_button->connect (&#39;clicked&#39;, &#39;openFile&#39;, $file);
    $ok_button->connect_object (&#39;clicked&#39;, array ($file, &#39;destroy&#39;));
    $cancel_button = $file->cancel_button;
    $cancel_button->connect_object (&#39;clicked&#39;, array ($file, &#39;destroy&#39;));
    $file->show ();
}

$filePath = null;
function openFile ($button, $f)          // 打开文件的函数
{
    GLOBAL $text, $save, $filePath;
    $filePath = $f->get_filename ();
    if (is_file ($filePath))
    {
        $fp = fopen ($filePath, &#39;r&#39;);
        while (!feof ($fp))
            $str .= fgets ($fp, 1024);
        $text->insert (null, null, null, $str);
        fclose ($fp);
        return $filePath;
    }
}

function saveFile ()                // 保存文件的函数
{
    GLOBAL $filePath, $text;
    if (is_file ($filePath))
    {
        $str = $text->get_chars (0, -1);
        $fp = fopen ($filePath, &#39;w&#39;);
        fwrite ($fp, $str);
        fclose ($fp);
    }
    return;
}

$window->show_all ();             // 显示窗体内的所有控件
gtk::main ();                      // 最重要的一句，不可少的
?>

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