1 files changed, 84 insertions, 0 deletions
diff --git a/src/gui/WidgetFactory.cpp b/src/gui/WidgetFactory.cpp
new file mode 100644
index 00000000..9579a1e1
--- /dev/null
+++ b/src/gui/WidgetFactory.cpp
@@ -0,0 +1,84 @@
+/* This file is part of Ingen.
+ * Copyright 2007-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen 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.
+ *
+ * Ingen 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "WidgetFactory.hpp"
+#include <fstream>
+#include "raul/log.hpp"
+#include "ingen-config.h"
+#include "shared/runtime_paths.hpp"
+
+using namespace std;
+using namespace Raul;
+
+namespace Ingen {
+namespace GUI {
+
+Glib::ustring WidgetFactory::ui_filename = "";
+
+inline static bool
+is_readable(const std::string& filename)
+{
+	std::ifstream fs(filename.c_str());
+	const bool fail = fs.fail();
+	fs.close();
+	return !fail;
+}
+
+void
+WidgetFactory::find_ui_file()
+{
+	// Try file in bundle (directory where executable resides)
+	ui_filename = Shared::bundle_file_path("ingen_gui.ui");
+	if (is_readable(ui_filename))
+		return;
+
+	// Try ENGINE_UI_PATH from the environment
+	const char* const env_path = getenv("INGEN_UI_PATH");
+	if (env_path && is_readable(env_path)) {
+		ui_filename = env_path;
+		return;
+	}
+
+	// Try the default system installed path
+	ui_filename = Shared::data_file_path("ingen_gui.ui");
+	if (is_readable(ui_filename))
+		return;
+
+	error << "[WidgetFactory] Unable to find ingen_gui.ui in "
+	      << INGEN_DATA_DIR << endl;
+	throw std::runtime_error("Unable to find UI file");
+}
+
+Glib::RefPtr<Gtk::Builder>
+WidgetFactory::create(const string& toplevel_widget)
+{
+	if (ui_filename.empty())
+		find_ui_file();
+
+	try {
+		if (toplevel_widget.empty())
+			return Gtk::Builder::create_from_file(ui_filename);
+		else
+			return Gtk::Builder::create_from_file(ui_filename, toplevel_widget.c_str());
+	} catch (const Gtk::BuilderError& ex) {
+		error << "[WidgetFactory] " << ex.what() << endl;
+		throw ex;
+	}
+}
+
+} // namespace GUI
+} // namespace Ingen