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Import
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1996-05-21
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3KB
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87 lines
/*
#### # # # #
# # # # # The FreeWare C library for
# # ## ### # # # # ### RISC OS machines
# # # # # # # # # # # ___________________________________
# # #### ### ## # # # #
# # # # # # # # # # Please refer to the accompanying
#### ### #### # # ##### # ### documentation for conditions of use
________________________________________________________________________
File: Import.h
Author: Copyright © 1995 Julian Smith
Version: 1.00 (17 Jan 1995)
Purpose: File import handling.
*/
#ifndef __Desk_Import_h
#define __Desk_Import_h
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __Desk_Wimp_h
#include "Desk.Wimp.h"
#endif
typedef void (*Desk_import_fileimporter)( Desk_message_dataload *data, void *reference);
/*
This function-type should load data from the file specified in 'data'.
'reference' is the reference originally passed to
Desk_Import_RegisterFileLoader.
*/
typedef void *Desk_import_ramimporter;
/*
This will be changed sometime to be a function-type for importing using
the RAM transfer protocol.
*/
void Desk_Import_RegisterFileLoader(
Desk_import_fileimporter fn,
Desk_import_ramimporter ramfn,
Desk_window_handle window,
Desk_icon_handle icon,
void *reference
);
/*
This registers an internal function (using Desk_Event_Claim) which is called
whenver a file is dropped onto window-icon, and does all the
Desk_Wimp_SendMessage stuff involved in the wimp file transfer protocol.
'ramfn' is ignored at the moment - use NULL. Eventuall the Import
library will support ram-transfer.
You supply a function 'fn' which will be called to do the actual file-loading,
using the information in the Desk_message_dataload structure.
'fn' will also be given 'reference' as passed in the original call to
Desk_Import_RegisterFileLoader, which can be used to give extra information.
NB Desk_message_dataload is defined in DeskLib:Wimp.h and has the following
fields:
Desk_window_handle window;
Desk_icon_handle icon;
Desk_wimp_point pos;
int estsize;
int filetype;
char filename[212];
The window, icon and pos are the mouse info for where the file was dropped.
filetype and filename are as given by whoever is giving us the file.
'fn' should *not* call Desk_Wimp_Poll, as it is called in the middle of
the file-transfer protocol.
*/
#ifdef __cplusplus
}
#endif
#endif