OpenShot Audio Library | OpenShotAudio  0.3.2
juce_UndoableAction.h
1 /*
2  ==============================================================================
3 
4  This file is part of the JUCE library.
5  Copyright (c) 2017 - ROLI Ltd.
6 
7  JUCE is an open source library subject to commercial or open-source
8  licensing.
9 
10  By using JUCE, you agree to the terms of both the JUCE 5 End-User License
11  Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
12  27th April 2017).
13 
14  End User License Agreement: www.juce.com/juce-5-licence
15  Privacy Policy: www.juce.com/juce-5-privacy-policy
16 
17  Or: You may also use this code under the terms of the GPL v3 (see
18  www.gnu.org/licenses).
19 
20  JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
21  EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
22  DISCLAIMED.
23 
24  ==============================================================================
25 */
26 
27 namespace juce
28 {
29 
30 //==============================================================================
39 class JUCE_API UndoableAction
40 {
41 protected:
43  UndoableAction() = default;
44 
45 public:
47  virtual ~UndoableAction() = default;
48 
49  //==============================================================================
61  virtual bool perform() = 0;
62 
74  virtual bool undo() = 0;
75 
76  //==============================================================================
89  virtual int getSizeInUnits() { return 10; }
90 
98  virtual UndoableAction* createCoalescedAction (UndoableAction* nextAction) { ignoreUnused (nextAction); return nullptr; }
99 };
100 
101 } // namespace juce
virtual bool undo()=0
UndoableAction()=default
virtual ~UndoableAction()=default
virtual bool perform()=0
virtual UndoableAction * createCoalescedAction(UndoableAction *nextAction)
virtual int getSizeInUnits()