ardour/gtk2_ardour/gui_object.h

80 lines
2.4 KiB
C++

/*
Copyright (C) 2011 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __gtk_ardour_gui_object_h__
#define __gtk_ardour_gui_object_h__
#include <map>
#include <string>
#include <boost/variant.hpp>
#include "pbd/xml++.h"
#include "pbd/id.h"
class GUIObjectState
{
public:
GUIObjectState ();
static const std::string xml_node_name;
void load (const XMLNode&);
int set_state (const XMLNode&);
XMLNode& get_state () const;
/** Get a string from our state.
* @param id property of Object node to look for.
* @param prop_name name of the Object property to return.
* @param empty if non-0, filled in with true if the property is currently non-existant, otherwise false.
* @return value of property `prop_name', or empty.
*/
std::string get_string (const std::string& id, const std::string& prop_name, bool* empty = 0);
template<typename T> void set_property (const std::string& id, const std::string& prop_name, const T& val) {
XMLNode* child = get_or_add_node (id);
std::stringstream s;
s << val;
child->add_property (prop_name.c_str(), s.str());
}
/** Remove node with provided id.
* @param id property of Object node to look for.
*/
void remove_node (const std::string& id);
std::list<std::string> all_ids () const;
XMLNode* get_or_add_node (const std::string &);
static XMLNode* get_node (const XMLNode *, const std::string &);
static XMLNode* get_or_add_node (XMLNode *, const std::string &);
private:
// no copy construction. object_map saves pointers to _state XMLNodes
// use set_state(get_state())
GUIObjectState (const GUIObjectState& other);
XMLNode _state;
// ideally we'd use a O(1) hash table here,
// but O(log(N)) is fine already.
std::map <std::string, XMLNode*> object_map;
};
#endif /* __gtk_ardour_gui_object_h__ */