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/* Gtk+ User Interface Builder
* Copyright (C) 1998-1999 Damon Chaplin
*
* 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* File : glade_plugin.c
* Description : Provides support for plugin widget libraries which use Args.
* Unfinished, experimental code at present.
* For Gnome, we may want to think about bonobo components,
* rather like COM/ActiveX components in Delphi/VB.
*/
#include "gladeconfig.h"
#ifndef _WIN32
#include <gmodule.h>
#endif
#include <gtk/gtk.h>
#include "gbwidget.h"
#include "glade_plugin.h"
#include "palette.h"
#include "utils.h"
/* This loads extra libraries of widgets which we will access via the GTK+
Arg functions. */
void
glade_plugin_load_plugins (void)
{
#if 0
/* FIXME: Here we just test for /usr/local/gnome/lib/libdruid.so, but we'll
support some user configuration later. */
gchar *module_dir = "/usr/local/gnome/lib";
gchar *module_file = "druid";
typedef gboolean (*GladePluginInitFunc) (gint **widget_types,
gchar ****xpm_data);
GModule *module;
gchar *library_file;
gpointer symbol_value;
GladePluginInitFunc plugin_init_func;
gboolean status;
gint *widget_types;
gchar ***widget_xpms;
gint i;
/* Check if dynamic loading is supported by the current platform. */
if (!g_module_supported ())
return;
library_file = g_module_build_path (module_dir, module_file);
if (!glade_util_file_exists (library_file))
return;
module = g_module_open (library_file, 0);
g_return_if_fail (module != NULL);
/* Try to find the initialization function. */
if (!g_module_symbol (module, "glade_plugin_init", &symbol_value))
{
g_warning ("Plugin library contains no initialization function: %s\n",
library_file);
return;
}
plugin_init_func = (GladePluginInitFunc) symbol_value;
status = (*plugin_init_func) (&widget_types, &widget_xpms);
g_return_if_fail (status == TRUE);
g_return_if_fail (widget_types != NULL);
for (i = 0; widget_types[i]; i++)
{
GbWidget *gbwidget;
gchar *class_name;
gbwidget = glade_plugin_new ();
if (widget_xpms)
{
gbwidget->pixmap_struct = widget_xpms[i];
}
class_name = gtk_type_name (widget_types[i]);
gbwidget->tooltip = class_name;
gb_widget_register_gbwidget (class_name, gbwidget);
palette_add_gbwidget (gbwidget, "Plugins", class_name);
}
#endif
}
/* This finds out which Args the widget (and any ancestors) support. */
static void
glade_plugin_create_properties (GtkWidget * widget,
GbWidgetCreateArgData * data)
{
#if 0
GtkObjectClass *klass;
GtkArg *args;
guint32 *arg_flags;
guint n_args;
gint arg;
gchar flags[16], *pos;
GtkType type;
g_print ("In glade_plugin_create_properties\n");
klass = GTK_OBJECT (widget)->klass;
g_return_if_fail (klass != NULL);
type = klass->type;
while (type != 0)
{
args = gtk_object_query_args (type, &arg_flags, &n_args);
for (arg = 0; arg < n_args; arg++)
{
pos = flags;
/* We use one-character flags for simplicity. */
if (arg_flags[arg] & GTK_ARG_READABLE)
*pos++ = 'r';
if (arg_flags[arg] & GTK_ARG_WRITABLE)
*pos++ = 'w';
if (arg_flags[arg] & GTK_ARG_CONSTRUCT)
*pos++ = 'x';
if (arg_flags[arg] & GTK_ARG_CONSTRUCT_ONLY)
*pos++ = 'X';
if (arg_flags[arg] & GTK_ARG_CHILD_ARG)
*pos++ = 'c';
*pos = '\0';
g_print ("ARG: %s (%s:%s)\n",
args[arg].name, gtk_type_name (args[arg].type), flags);
}
g_free (args);
g_free (arg_flags);
type = gtk_type_parent (type);
}
#endif
}
/* This creates a new GbWidget which may have different tooltip/icon fields,
but the functions will all be the same, since we can handle Args
generically. */
GbWidget*
glade_plugin_new ()
{
GbWidget *gbwidget;
gbwidget = g_new (GbWidget, 1);
gb_widget_init_struct (gbwidget);
gbwidget->gb_widget_create_properties = glade_plugin_create_properties;
return gbwidget;
}
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