summaryrefslogtreecommitdiffstats
path: root/kig/objects/object_holder.h
blob: 1e80269bfc1ec38f4c59c6bbabdbe08a246bf2a2 (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
// Copyright (C)  2003  Dominique Devriese <devriese@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.

#ifndef KIG_OBJECTS_OBJECT_HOLDER_H
#define KIG_OBJECTS_OBJECT_HOLDER_H

#include "object_calcer.h"

#include <tqstring.h>

/**
 * An ObjectHolder represents an object as it is known to the
 * document.  It keeps a pointer to an ObjectCalcer, where it gets its
 * data ( the ObjectImp that the ObjectCalcer holds ) from.  It also
 * holds information about how to draw this ObjectImp on the window,
 * by keeping a pointer to an ObjectDrawer ( see below ).  In its draw
 * method, it gets the ObjectImp from the ObjectCalcer, and passes it
 * to the ObjectDrawer, asking it to draw the ObjectImp on the window.
 *
 * The document ( check the KigDocument class ) holds a list of these
 * ObjectHolder's.  This is its only link with the ObjectCalcer
 * dependency graph.
 *
 * An ObjectHolder keeps a reference to its * ObjectCalcer.
 */
class ObjectHolder
{
  ObjectCalcer::shared_ptr mcalcer;
  ObjectDrawer* mdrawer;
  ObjectConstCalcer::shared_ptr mnamecalcer;

public:
  /**
   * Construct a new ObjectHolder with a given ObjectCalcer and
   * ObjectDrawer, with a given name calcer.
   */
  ObjectHolder( ObjectCalcer* calcer, ObjectDrawer* drawer, ObjectConstCalcer* namecalcer );
  /**
   * Construct a new ObjectHolder with a given ObjectCalcer and
   * ObjectDrawer.
   */
  ObjectHolder( ObjectCalcer* calcer, ObjectDrawer* drawer );
  /**
   * equivalent to the previous constructor, but with a default
   * ObjectDrawer and no name.
   */
  ObjectHolder( ObjectCalcer* calcer );
  ~ObjectHolder();

  const ObjectImp* imp() const;
  const ObjectCalcer* calcer() const;
  ObjectCalcer* calcer();
  const ObjectDrawer* drawer() const;
  ObjectDrawer* drawer();
  // the following two return zero if no name is set.
  const ObjectConstCalcer* nameCalcer() const;
  ObjectConstCalcer* nameCalcer();
  /**
   * Setting the namecalcer is only allowed if previously none was
   * set. This way, we avoid keeping a useless namecalcer around if
   * no name is set.
   */
  void setNameCalcer( ObjectConstCalcer* namecalcer );

  /**
   * returns TQString() if no name is set.
   */
  const TQString name() const;
  /**
   * Set the ObjectDrawer of this ObjectHolder to \p d , the old
   * ObjectDrawer is deleted.
   */
  void setDrawer( ObjectDrawer* d );
  /**
   * Set the ObjectDrawer of this ObjectHolder to \p d , the old
   * ObjectDrawer is not deleted, but returned.
   */
  ObjectDrawer* switchDrawer( ObjectDrawer* d );

  /**
   * Make our ObjectCalcer recalculate its ObjectImp.
   */
  void calc( const KigDocument& );
  /**
   * Draw this object on the given KigPainter.  If \p selected is true,
   * then it will be drawn in red, instead of its normal color.
   */
  void draw( KigPainter& p, bool selected ) const;
  /**
   * Returns whether this object contains the point \p p .
   */
  bool contains( const Coordinate& p, const KigWidget& w, bool nv = false ) const;
  /**
   * Returns whether this object is in the rectangle \p r .
   */
  bool inRect( const Rect& r, const KigWidget& w ) const;
  /**
   * Returns whether this object is shown.
   */
  bool shown() const;

  /**
   * This call is simply forwarded to the ObjectCalcer.  Check the
   * documentation of ObjectCalcer::moveReferencePoint() for more info.
   */
  const Coordinate moveReferencePoint() const;
  /**
   * This call is simply forwarded to the ObjectCalcer.  Check the
   * documentation of ObjectCalcer::move() for more info.
   */
  void move( const Coordinate& to, const KigDocument& );
  /**
   * This call is simply forwarded to the ObjectCalcer.  Check the
   * documentation of ObjectCalcer::canMove() for more info.
   */
  bool canMove() const;
  /**
   * This call is simply forwarded to the ObjectCalcer.  Check the
   * documentation of ObjectCalcer::isFreelyTranslatable() for more info.
   */
  bool isFreelyTranslatable() const;

  /**
   * Return a statement saying something like "select this segment" or
   * "select segment ab" depending on whether this ObjectHolder has a
   * name.
   */
  TQString selectStatement() const;
};

#endif