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/*
* glade-gtk-overlay.c - GladeWidgetAdaptor for GtkOverlay widget
*
* Copyright (C) 2013 Juan Pablo Ugarte
*
* Authors:
* Juan Pablo Ugarte <juanpablougarte@gmail.com>
*
* 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include "glade-gtk.h"
#include <gladeui/glade.h>
#include <glib/gi18n-lib.h>
#include <string.h>
typedef struct
{
GtkWidget *bin_child;
GtkWidget *overlay_child;
} VisibilityData;
static void
set_children_visibility (GtkWidget *widget, gpointer user_data)
{
VisibilityData *data = user_data;
/* We never hide the main child */
if (widget == data->bin_child)
return;
/* We only hide overlay children when one of them is selected */
if (data->overlay_child)
gtk_widget_set_visible (widget, widget == data->overlay_child);
else
/* otherwhise we show them so we can interact with the container */
gtk_widget_set_visible (widget, TRUE);
}
static inline GtkWidget *
get_overlay_children (GtkWidget *deep_child, GtkWidget *overlay)
{
GtkWidget *parent = deep_child;
while (parent)
{
if (parent == overlay)
return deep_child;
deep_child = parent;
parent = gtk_widget_get_parent (parent);
}
return NULL;
}
static void
on_project_selection_changed (GladeProject *project, GtkWidget *overlay)
{
VisibilityData data = { gtk_bin_get_child (GTK_BIN (overlay)), NULL };
GList *l;
for (l = glade_project_selection_get (project); l; l = g_list_next (l))
{
GtkWidget *selection;
if (GTK_IS_WIDGET (l->data) && (selection = GTK_WIDGET (l->data)) &&
overlay != selection)
data.overlay_child = get_overlay_children (selection, overlay);
if (data.overlay_child)
break;
}
gtk_container_foreach (GTK_CONTAINER (overlay), set_children_visibility, &data);
}
static void
on_widget_project_notify (GObject *gobject,
GParamSpec *pspec,
GladeProject *old_project)
{
GladeWidget *gwidget = GLADE_WIDGET (gobject);
GladeProject *project = glade_widget_get_project (gwidget);
GObject *object = glade_widget_get_object (gwidget);
if (old_project)
g_signal_handlers_disconnect_by_func (old_project, on_project_selection_changed, object);
g_signal_handlers_disconnect_by_func (gwidget, on_widget_project_notify, old_project);
g_signal_connect_object (gwidget, "notify::project",
G_CALLBACK (on_widget_project_notify),
project, 0);
if (project)
g_signal_connect_object (project, "selection-changed",
G_CALLBACK (on_project_selection_changed),
object, 0);
}
void
glade_gtk_overlay_post_create (GladeWidgetAdaptor *adaptor,
GObject *object,
GladeCreateReason reason)
{
GladeWidget *widget = glade_widget_get_from_gobject (object);
if (reason == GLADE_CREATE_USER)
gtk_container_add (GTK_CONTAINER (object), glade_placeholder_new ());
on_widget_project_notify (G_OBJECT (widget), NULL, NULL);
}
gboolean
glade_gtk_overlay_add_verify (GladeWidgetAdaptor *adaptor,
GtkWidget *container,
GtkWidget *child,
gboolean user_feedback)
{
if (!GTK_IS_WIDGET (child))
{
if (user_feedback)
{
GladeWidgetAdaptor *widget_adaptor =
glade_widget_adaptor_get_by_type (GTK_TYPE_WIDGET);
glade_util_ui_message (glade_app_get_window (),
GLADE_UI_INFO, NULL,
ONLY_THIS_GOES_IN_THAT_MSG,
glade_widget_adaptor_get_title (widget_adaptor),
glade_widget_adaptor_get_title (adaptor));
}
return FALSE;
}
return TRUE;
}
void
glade_gtk_overlay_add_child (GladeWidgetAdaptor *adaptor,
GObject *object,
GObject *child)
{
gchar *special_type = g_object_get_data (child, "special-child-type");
GtkWidget *bin_child;
if ((special_type && !strcmp (special_type, "overlay")) ||
((bin_child = gtk_bin_get_child (GTK_BIN (object))) &&
!GLADE_IS_PLACEHOLDER (bin_child)))
{
g_object_set_data (child, "special-child-type", "overlay");
gtk_overlay_add_overlay (GTK_OVERLAY (object), GTK_WIDGET (child));
}
else
/* Chain Up */
GLADE_WIDGET_ADAPTOR_GET_ADAPTOR_CLASS (GTK_TYPE_CONTAINER)->add (adaptor, object, child);
}
void
glade_gtk_overlay_remove_child (GladeWidgetAdaptor *adaptor,
GObject *object,
GObject *child)
{
gchar *special_type = g_object_get_data (child, "special-child-type");
if (special_type && !strcmp (special_type, "overlay"))
{
g_object_set_data (child, "special-child-type", NULL);
gtk_widget_show (GTK_WIDGET (child));
}
gtk_container_remove (GTK_CONTAINER (object), GTK_WIDGET (child));
if (gtk_bin_get_child (GTK_BIN (object)) == NULL)
gtk_container_add (GTK_CONTAINER (object), glade_placeholder_new ());
}
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