source: src/Actions/ActionHistory.hpp@ 23359f

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Last change on this file since 23359f was 0b2ce9, checked in by Frederik Heber <heber@…>, 14 years ago

Implemented macros for automatically generating repetitive stuff around Actions.

The idea is that only the following items have to be provided for by the user

  • parameters (i.e. for each the following tupel: type, token and reference)
  • perform...(), ...Undo(), ...

Therefore, we have three new files:

  • Action_impl_header.hpp: Is for the declarations in the header
  • Action_impl_pre.hpp: Is before definition of functions
  • Action_impl_post.hpp: is after definition of functions (cleanup)

Changes:
  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 * ActionHistory.hpp
3 *
4 * Created on: Mar 25, 2010
5 * Author: crueger
6 */
7
8#ifndef ACTIONHISTORY_HPP_
9#define ACTIONHISTORY_HPP_
10
11#include "Patterns/Singleton.hpp"
12
13#include <deque>
14
15#include "Actions/Action.hpp"
16
17
18class ActionHistory : public Singleton<ActionHistory,false>
19{
20 friend class Singleton<ActionHistory,false>;
21
22 struct HistoryElement {
23 HistoryElement(Action *_action, Action::state_ptr _state) :
24 action(_action),
25 state(_state)
26 {}
27 Action *action;
28 Action::state_ptr state;
29 };
30
31 class UndoAction : public Action {
32 public:
33 UndoAction(ActionHistory*);
34 virtual ~UndoAction();
35
36 virtual bool canUndo();
37 virtual bool shouldUndo();
38
39 virtual bool isActive();
40 protected:
41 virtual Dialog * fillDialog(Dialog *dialog);
42 private:
43 virtual void getParametersfromValueStorage();
44 virtual Action::state_ptr performCall();
45 virtual Action::state_ptr performUndo(Action::state_ptr);
46 virtual Action::state_ptr performRedo(Action::state_ptr);
47
48 ActionHistory *hist;
49
50 static const char NAME[];
51 };
52
53 class RedoAction : public Action {
54 public:
55 RedoAction(ActionHistory*);
56 virtual ~RedoAction();
57
58 virtual bool canUndo();
59 virtual bool shouldUndo();
60
61 virtual bool isActive();
62
63 protected:
64 virtual Dialog * fillDialog(Dialog *dialog);
65 private:
66 virtual void getParametersfromValueStorage();
67 virtual Action::state_ptr performCall();
68 virtual Action::state_ptr performUndo(Action::state_ptr);
69 virtual Action::state_ptr performRedo(Action::state_ptr);
70
71 ActionHistory *hist;
72
73 static const char NAME[];
74 };
75
76public:
77
78 void undoLast();
79 void redoLast();
80
81 bool hasUndo();
82 bool hasRedo();
83
84 void addElement(Action*,Action::state_ptr);
85 void clear();
86protected:
87 ActionHistory();
88 virtual ~ActionHistory();
89private:
90 std::deque<HistoryElement> history;
91 std::deque<HistoryElement> yrotsih;
92
93public:
94 // when constructing the actions we need the Actionregistry Singleton
95 // Singletons need static variables to work, but we cannot access statics
96 // inside a static initialization, so we have this init function that
97 // needs to be called at a non-static point at the start of the program
98 static void init();
99};
100
101#endif /* ACTIONHISTORY_HPP_ */
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