summaryrefslogtreecommitdiffstats
path: root/korganizer/history.h
blob: d0b7e57551f8c26df6d0fd26ea3f3d4f24b88224 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/*
    This file is part of KOrganizer.

    Copyright (c) 2003 Cornelius Schumacher <schumacher@kde.org>

    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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

    As a special exception, permission is given to link this program
    with any edition of TQt, and distribute the resulting executable,
    without including the source code for TQt in the source distribution.
*/
#ifndef KORG_HISTORY_H
#define KORG_HISTORY_H

#include <tqobject.h>
#include <tqptrlist.h>

namespace KCal {

class Calendar;
class Incidence;

}

namespace KOrg {

class History : public TQObject
{
    Q_OBJECT
  
  public:
    History( KCal::Calendar * );

    void recordDelete( KCal::Incidence * );
    void recordAdd( KCal::Incidence * );
    void recordEdit( KCal::Incidence *oldIncidence,
                     KCal::Incidence *newIncidence );
    void startMultiModify( const TQString &description );
    void endMultiModify();

  public slots:
    void undo();
    void redo();

  signals:
    void undone();
    void redone();

    void undoAvailable( const TQString & );
    void redoAvailable( const TQString & );

  protected:
    void truncate();

  private:
  
    class Entry
    {
      public:
        Entry( KCal::Calendar * );
        virtual ~Entry();
    
        virtual void undo() = 0;
        virtual void redo() = 0;

        virtual TQString text() = 0;

      protected:
        KCal::Calendar *mCalendar;
    };

    class EntryDelete : public Entry
    {
      public:
        EntryDelete( KCal::Calendar *, KCal::Incidence * );
        ~EntryDelete();
        
        void undo();
        void redo();
    
        TQString text();
    
      private:
        KCal::Incidence *mIncidence;
    };

    class EntryAdd : public Entry
    {
      public:
        EntryAdd( KCal::Calendar *, KCal::Incidence * );
        ~EntryAdd();
        
        void undo();
        void redo();

        TQString text();

      private:
        KCal::Incidence *mIncidence;
    };
    
    class EntryEdit : public Entry
    {
      public:
        EntryEdit( KCal::Calendar *calendar, KCal::Incidence *oldIncidence,
                   KCal::Incidence *newIncidence );
        ~EntryEdit();
        
        void undo();
        void redo();
      
        TQString text();
      
      private:
        KCal::Incidence *mOldIncidence;
        KCal::Incidence *mNewIncidence;
    };

    class MultiEntry : public Entry
    {
      public:
        MultiEntry( KCal::Calendar *calendar, const TQString &text );
        ~MultiEntry();
        
        void appendEntry( Entry* entry );
        void undo();
        void redo();
      
        TQString text();
      
      private:
        TQPtrList<Entry> mEntries;
        TQString mText;
    };

    KCal::Calendar *mCalendar;
    MultiEntry *mCurrentMultiEntry;

    TQPtrList<Entry> mEntries;
    TQPtrListIterator<Entry> mUndoEntry;
    TQPtrListIterator<Entry> mRedoEntry;
};

}
#endif