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/*
* @(#) $Id: gwydgets.c 15598 2013-11-11 12:33:32Z yeti-dn $
* Copyright (C) 2003 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <libdraw/gwydraw.h>
#include <libgwydgets/gwydgets.h>
static GdkGLConfig *glconfig = NULL;
/************************** Initialization ****************************/
/**
* gwy_widgets_type_init:
*
* Makes libgwydgets types safe for deserialization and performs other
* initialization. You have to call this function before using widgets and
* objects from libgwydgets.
*
* Calls gwy_draw_type_init() first to make sure libgwydraw is initialized.
*
* It is safe to call this function more than once, subsequent calls are no-op.
**/
void
gwy_widgets_type_init(void)
{
static guint types_initialized = FALSE;
if (types_initialized)
return;
gwy_draw_type_init();
g_type_class_peek(GWY_TYPE_GRAPH_CURVE_MODEL);
g_type_class_peek(GWY_TYPE_GRAPH_MODEL);
g_type_class_peek(GWY_TYPE_3D_LABEL);
g_type_class_peek(GWY_TYPE_3D_SETUP);
g_type_class_peek(GWY_TYPE_SELECTION_GRAPH_POINT);
g_type_class_peek(GWY_TYPE_SELECTION_GRAPH_AREA);
g_type_class_peek(GWY_TYPE_SELECTION_GRAPH_ZOOM);
g_type_class_peek(GWY_TYPE_SELECTION_GRAPH_LINE);
g_type_class_peek(GWY_TYPE_SELECTION_GRAPH_1DAREA);
types_initialized = 1;
gtk_rc_parse_string
(/* graph window statusbar */
"style \"gwyflatstatusbar\" {\n"
" GtkStatusbar::shadow_type = 0\n"
"}\n"
"widget \"*.gwyflatstatusbar\" style \"gwyflatstatusbar\"\n"
"\n");
}
/**
* gwy_widgets_gl_init:
*
* Configures an OpenGL-capable visual for 3D widgets.
*
* Use gwy_widgets_get_gl_config() to get the framebuffer configuration.
*
* This function must be called before OpenGL widgets can be used.
*
* Returns: %TRUE if an appropriate visual was found. If Gwyddion was compiled
* without OpenGL support, it always returns %FALSE.
**/
gboolean
gwy_widgets_gl_init(void)
{
/* when called twice, fail but successfully :o) */
g_return_val_if_fail(glconfig == NULL, TRUE);
#ifdef HAVE_GTKGLEXT
glconfig = gdk_gl_config_new_by_mode(GDK_GL_MODE_RGB
| GDK_GL_MODE_DEPTH
| GDK_GL_MODE_DOUBLE);
/* Try double-buffered visual */
if (!glconfig) {
g_warning("Cannot find a double-buffered OpenGL visual, "
"Trying single-buffered visual.");
/* Try single-buffered visual */
glconfig = gdk_gl_config_new_by_mode(GDK_GL_MODE_RGB
| GDK_GL_MODE_DEPTH);
if (!glconfig) {
g_warning("No appropriate OpenGL-capable visual found.");
}
}
#endif
return glconfig != NULL;
}
/**
* gwy_widgets_get_gl_config:
*
* Returns OpenGL framebuffer configuration for 3D widgets.
*
* Call gwy_widgets_gl_init() first.
*
* Returns: The OpenGL framebuffer configuration, %NULL if OpenGL
* initialization was not successfull.
**/
GdkGLConfig*
gwy_widgets_get_gl_config(void)
{
return glconfig;
}
/************************** Documentation ****************************/
/**
* SECTION:gwydgets
* @title: gwydgets
* @short_description: Base functions
*
* Gwyddion classes has to be initialized before they can be safely
* deserialized. The function gwy_type_init() performs this initialization.
*
* Before 3D widgets (#Gwy3DView) can be used, OpenGL must be initialized with
* gwy_widgets_gl_init().
**/
/**
* GdkGLConfig:
*
* Placeholder typedef.
*
* If Gwyddion is compiled with OpenGL (i.e., GtkGLExt) this is the real
* <type>GdkGLConfig</type>. However, if Gwyddion is compiled without OpenGL
* this type is typedefed as <type>void</type>.
*
* Since one cannot actually use any of the Gwyddion OpenGL widgets if they
* are not enabled, this usually works well. However, it can break in the
* unlikely case one compiles with wibgwydgets that have OpenGL disabled and
* at the same time he uses GtkGLExt directly. In such case
* <type>GdkGLConfig</type> is defined twice. The only known fix is not
* to include <filename>gwydgets.h</filename> and GtkGLExt headers in the same
* source file.
**/
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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