/***************************************************************************
kdlgloader.h - loading dialogs at runtime
-------------------
begin : Wed Jun 8 19:19:32 MEST 1999
copyright : (C) 1999 by Pascal Krahmer
email : pascal@beast.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <dlfcn.h>
#define BEHAVE_REPORTERRORS 1 // Report errors to user by an message box
#define BEHAVE_IGNOREERRORS 2 // Ingore errors (i.e. while reading the dialog file)
#define KDLGERR_SUCCESS 0 // Success
#define KDLGERR_UNKNOWN 1 // Unknown error.
#define KDLGERR_NOT_SUPPORTED 2 // Requested function is not supported.
#define KDLGERR_BAD_PARAMETER 3 // Bad parameter given.
#define KDLGERR_NAME_DOES_NOT_EXIST 4 // Specified (var)name does not exist.
#define KDLGERR_NO_NAME_SPECIFIED 5 // No (var)name specified.
#define KDLGERR_WRONG_FLAGS 6 // Wrong or unsupported flags given.
#define KDLGERR_DLG_NOT_OPENED 7 // Dialog is not open.
#define KDLGERR_ERROR_READING_FILE 8 // Error while reading the dialog file.
static const char *KDLGLDR_LIBRARY_NAME = "libkdlgloader.so";
class KDlgLdr;
static const char *FNC_KDLGLDR_INIT = "kdlgldr_init";
static const char *FNC_KDLGLDR_DELETE = "kdlgldr_delete";
static const char *FNC_KDLGLDR_OPENDLG = "kdlgldr_opendlg";
static const char *FNC_KDLGLDR_FREEDLG = "kdlgldr_freedlg";
static const char *FNC_KDLGLDR_GETITEMPTRNAME = "kdlgldr_getitemptrname";
static const char *FNC_KDLGLDR_GETITEMPTRVARNAME = "kdlgldr_getitemptrvarname";
static const char *FNC_KDLGLDR_SETBEHAVIOUR = "kdlgldr_setbehaviour";
KDlgLdr* (*KDlgLdr_Init)(QWidget*) = 0; // KDlgLoader::KDlgLoader()
long (*KDlgLdr_Delete)(KDlgLdr*) = 0; // delete KDlgLoader
long (*KDlgLdr_OpenDialog)(KDlgLdr*, QString) = 0; // KDlgLoader::openDialog()
long (*KDlgLdr_FreeDialog)(KDlgLdr*) = 0; // KDlgLoader::freeDialog()
QWidget* (*KDlgLdr_GetItemPtrName)(KDlgLdr*, QString) = 0; // KDlgLoader::getItemPtrName()
QWidget* (*KDlgLdr_GetItemPtrVarName)(KDlgLdr*, QString) = 0; // KDlgLoader::getItemPtrVarName()
long (*KDlgLdr_SetBehaviour)(KDlgLdr*, long) = 0; // KDlgLoader::setBehaviour()
void *KDlgLdr_Library = 0; // Library handle
/** This method loades the library and gets the function pointers if not done before. */
bool loadKDlgLdrLibrary()
{
if (!KDlgLdr_Library)
{
KDlgLdr_Library = dlopen(KDLGLDR_LIBRARY_NAME,RTLD_NOW);
if (!KDlgLdr_Library)
{
warning("Error loading dialog loader library. (%s)\n",dlerror());
return false;
}
}
#define LOAD_LIB_FNC(fncname, fncptr) \
if (!fncptr) { (void*)fncptr = dlsym(KDlgLdr_Library, fncname); \
if (!fncptr) { warning("Getting dialog loader library method failed. (%s)",dlerror()); return false; } }
LOAD_LIB_FNC(FNC_KDLGLDR_INIT, KDlgLdr_Init)
LOAD_LIB_FNC(FNC_KDLGLDR_DELETE, KDlgLdr_Delete)
LOAD_LIB_FNC(FNC_KDLGLDR_OPENDLG, KDlgLdr_OpenDialog)
LOAD_LIB_FNC(FNC_KDLGLDR_FREEDLG, KDlgLdr_FreeDialog)
LOAD_LIB_FNC(FNC_KDLGLDR_GETITEMPTRNAME, KDlgLdr_GetItemPtrName)
LOAD_LIB_FNC(FNC_KDLGLDR_GETITEMPTRVARNAME, KDlgLdr_GetItemPtrVarName)
LOAD_LIB_FNC(FNC_KDLGLDR_SETBEHAVIOUR, KDlgLdr_SetBehaviour)
#undef LOAD_LIB_FNC
return true;
}
/** This is a wrapper class for dealing with the library */
class KDlgLoader {
public:
/** construtor */
KDlgLoader(QWidget *parent)
{
libLoaded = false;
if (!loadKDlgLdrLibrary())
return;
if (ldr)
ldr = KDlgLdr_Init(parent);
libLoaded = true;
}
/** destructor */
~KDlgLoader()
{
if (ldr)
{
freeDialog();
deleteLoader();
}
}
bool isLibLoaded() { return libLoaded; }
/** Opens a dialog from a file specified by fileName. */
long openDialog(QString fileName)
{
return KDlgLdr_OpenDialog(ldr, fileName);
}
/** Frees all the dialogs memory. */
long freeDialog()
{
return KDlgLdr_FreeDialog(ldr);
}
/** Deletes the pointer (ldr) */
long deleteLoader()
{
return KDlgLdr_Delete(ldr);
}
/** Returns a pointer to an item specified by itemName. */
QWidget* getItemPtrName(QString itemName)
{
return KDlgLdr_GetItemPtrName(ldr, itemName);
}
/** Returns a pointer to an item specified by itemName. */
QWidget* getItemPtrVarName(QString itemName)
{
return KDlgLdr_GetItemPtrVarName(ldr, itemName);
}
/** Changes the classes' behaviour. You can use a combination of the BEHAVE_* constants. */
long setBehaviour(long flags = 0)
{
return KDlgLdr_SetBehaviour(ldr, flags);
}
private:
/** this is a pointer of an abstract type */
KDlgLdr *ldr;
bool libLoaded;
};
Documentation generated by ralsina@thurman.localnet on Tue Jun 22 16:27:40 /etc/localtime 1999