/* $Id: wt.h,v 1.2 2002/04/07 01:26:17 micahjd Exp $ *  * wt.h - Defines the Widget Template file format, used by the server and by *        programs that read and write Widget Template files * * PicoGUI small and efficient client/server GUI * Copyright (C) 2000-2002 Micah Dowty <micahjd@users.sourceforge.net> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. *  * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. *  * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  *  * Contributors: *  *  *  */#ifndef __WT_H#define __WT_H/* format version (file_ver) */#define PGWT_FORMATVERSION  0x0001/******** PicoGUI widget template file format ********//* All numbers in network byte order *//* Every widget template starts with this header (20 bytes) */struct pgwt_header {  char magic[4];              /* = "PGwt" */   u32 file_len;    /* Expected file length, or 0 to disable checking length and checksum */  u32 file_crc32;  /* 32-bit checksum, using zlib's CRC-32 algorithm */  u16 file_ver;    /* Format version */  u16 num_global;   /* Requests to be loaded globally  */  u16 num_instance; /* Number of per-instance requests */  u16 num_handles;  /* Size of handle table to define  */};/* * This is followed by (num_global + num_instance) PicoGUI requests, with global requests * before instance-specific requests.  * * After each request is run, its result is dealt with according to the 'id' value of the * request: * *  - from 0 to (num-handles-1) *    Stick the result in this location in the handle table * *  - 0xFFFFFFFF *    Ignore it * *  - Other values *    Reserved * * Also, within the requests any handle values with the MSB set (0x80000000 to 0xFFFFFFFF) * are looked up in this small handle table before looking up in the global handle tree. * * At the completion of instantiating a widget table, the number in handle table slot 0 * is returned to the client, and should generally be the head widget in the widget tree * defined by this template. * */#endif /* __WT_H */