README

PHP bindings to the gtk+3 C library.

The project only expose GTK API by FFI

Requirements

• PHP >= 7.4
• PHP FFI extension available
• toknot/ffi-extend >=0.1

composer install

composer require toknot/gtk

Status

• support C function call of GLib, GObject, Gio, Gtk, Atk, Gdk, Gdk-Pixbuf, Pango
• support C macro value and call of GLib,GLib, and a small part of GTK

Defined Constants

DLL file name and header file name map list:

class PHPGtk {
    public static $gtkDllMap  = [
        self::GLIB_ID => ['name' => 'libglib', 'header' => ['glib'], 'require_version' => '2.56'],
        self::GIO_ID => ['name' => 'libgio', 'header' => ['gio']],
        self::GOBJECT_ID => ['name' => 'libgobject', 'header' => ['gtype', 'gobject']],
        self::GTK_ID => ['name' => 'libgtk', 'header' => ['gtkfunc']],
        self::GDK_ID => ['name' => 'libgdk', 'header' => ['gdk'], 'require_version' => '3.20'],
        self::PIXBUF_ID => ['name' => 'libgdk_pixbuf', 'header' => ['pixbuf'], 'require_version' => '2.36'],
        self::PANGO_ID => ['name' => 'libpango', 'header' => ['pango'], 'require_version' => '1.42'],
        self::PANGO_CAIRO_ID => ['name' => 'libpangocairo', 'header' => ['pango_cairo']],
        self::ATK_ID => ['name' => 'libatk', 'header' => ['atk'], 'require_version' => '2.28'],
    ];
......
}

Gtk\PHPGtk::$gtkDllMap determine load dynamic library name prefix and header file.

Load Dynamic Library

• In Linux, default find:
  • when PHP_INT_SIZE equal 4, OS is 32bit, find /usr/lib
  • when PHP_INT_SIZE equal 8, OS is 64bit, find /usr/lib64
• specify lib path by self through Gtk\PHPGtk::gtk($libpath),
  • if $libpath is string, value must be lib directory path
  • will find match $libpath/$name-*.so, and load the first dll
• specify lib name through set name value of specify lib row of Gtk\APP::$gtkDllMap

Usage

• basic example

  include dirname(__DIR__) . '/src/PHPGtk.php';
  $gtk = \GTK\PHPGtk::gtk();
  function activate()
  {
      global $gtk, $app;
      try {
      $window = $gtk->gtk_application_window_new($app);
      $gtk->gtk_window_set_title($gtk->GTK_WINDOW($window), "Window");
      $gtk->gtk_window_set_default_size($gtk->GTK_WINDOW($window), 200, 200);
      $gtk->gtk_widget_show_all($window);
      } catch(\Error $e) {
          echo $e;
      }
  }
  
  
  function main($argc, $argv) : int
  {
      global $gtk, $app;
  
      $app = $gtk->gtk_application_new("org.gtk.example", 0);
  
      $gtk->g_signal_connect($app, "activate", 'activate');
  
      $gapp = $gtk->G_APPLICATION($app);
  
      $status = $gtk->g_application_run($gapp, $argc, $argv);
  
      $gtk->g_object_unref($app);
      return $status;
  }
  return main($argc, $argv);

• C Lib API call

  • PHPGtk class can be call Gtk,GLib,GObject,Gio,Gdk function
  • PHPGtk::atk() return Gtk\Atk, can be call GLib,GObject,ATK function
  • PHPGtk::gdk() return Gtk\Pixbuf, can be call GLib, GObject, GIO, GDK,gdk-pixbuf function
  • PHPGtk::pango() return Gtk\Pango, can be call GLib,GObject,Pango function
  • macro value get by same name constant of class
  • macro function call by same name method of class
  • lib version value defined by macro get by global same name constant
  • About gettext of glib:
    • Gtk\Glib::$GETTEXT_PACKAGE name of GETTEXT_PACKAGE when compile Glib, default is null
    • Gtk\Glib::$gettextDll path of gettext shared library, default is empty, if php eanble gettext, will use php gettext() function instead and the property invaild
  • Gtk\GtkWidget class provided simple OO method of call C function that related GtkWidget

Note:

• Default, The number of callback function argument must less than 10, otherwise extra argument value always NULL, only when Gtk\GtkAbstract::$gCallbackArgNum be changed to other value
• if C function for callback, use GObject::G_CALLBACK($callable) convert, the $callable is smailer [$gtk, $c_func_name, true], it php callable array has 3 entries, 3rd is bool value
• if new C variable be used occur segfault, try new unmanaged variable
• most class is sub of Gtk\GtkAbstract

For Windows

1. get libgtk3 binary DLL file, see https://www.gtk.org/docs/installations/windows/
2. copy libgtk3 all DLL file and dependency to your path, if use MSYS install, pass YOUP_PATH/mingw32/bin or YOUP_PATH/mingw64/bin to PHPGtk::gtk($libpath), if not installed other package,In the path DLL file is libgtk dependency package