Ardour  8.7-15-gadf511264b
control_group_member.h
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1 /*
2  * Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17  */
18 
19 #ifndef __libardour_control_group_member_h__
20 #define __libardour_control_group_member_h__
21 
22 namespace ARDOUR {
23 
24 class ControlGroup;
25 
27 {
28  public:
29  virtual ~ControlGroupMember () {};
30  private:
31  friend class ControlGroup;
32  /* Only a ControlGroup can call this; all membership changes must be
33  mediated by the ControlGroup, not by operating on the member.
34  */
35  virtual void set_group (std::shared_ptr<ControlGroup>) = 0;
36  virtual bool push_group (std::shared_ptr<ControlGroup>) = 0;
37  virtual bool pop_group () = 0;
38 };
39 
40 } /* namespace */
41 
42 #endif /* __libardour_control_group_member_h__ */
virtual bool push_group(std::shared_ptr< ControlGroup >)=0
virtual void set_group(std::shared_ptr< ControlGroup >)=0
virtual bool pop_group()=0
#define LIBARDOUR_API