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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/* This file is part of the KDE project
Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef FORMULAELEMENT_H
#define FORMULAELEMENT_H
// Formula include
#include "sequenceelement.h"
KFORMULA_NAMESPACE_BEGIN
class BasicElement;
class ContextStyle;
class FormulaDocument;
class SymbolTable;
/**
* The main element.
* A formula consists of a FormulaElement and its tqchildren.
* The only element that has no parent.
*/
class FormulaElement : public SequenceElement {
typedef SequenceElement inherited;
public:
/**
* The container this FormulaElement belongs to must not be 0,
* except you really know what you are doing.
*/
FormulaElement(FormulaDocument* container);
virtual FormulaElement* clone() { return 0; }
/**
* Returns the element the point is in.
*/
BasicElement* goToPos( FormulaCursor*, const LuPixelPoint& point );
/**
* Ordinary formulas are not write protected.
*/
virtual bool readOnly( const BasicElement* /*child*/ ) const { return false; }
/**
* @returns whether its prohibited to change the sequence with this cursor.
*/
virtual bool readOnly( const FormulaCursor* ) const { return false; }
/**
* Provide fast access to the rootElement for each child.
*/
virtual FormulaElement* formula() { return this; }
/**
* Provide fast access to the rootElement for each child.
*/
virtual const FormulaElement* formula() const { return this; }
/**
* Gets called just before the child is removed from
* the element tree.
*/
void elementRemoval(BasicElement* child);
/**
* Gets called whenever something changes and we need to
* recalc.
*/
virtual void changed();
/**
* Gets called when a request has the side effect of moving the
* cursor. In the end any operation that moves the cursor should
* call this.
*/
void cursorHasMoved( FormulaCursor* );
void moveOutLeft( FormulaCursor* );
void moveOutRight( FormulaCursor* );
void moveOutBelow( FormulaCursor* );
void moveOutAbove( FormulaCursor* );
/**
* Tell the user something has happened.
*/
void tell( const TQString& msg );
/**
* Gets called when the formula wants to vanish. The one who
* holds it should create an appropriate command and execute it.
*/
void removeFormula( FormulaCursor* );
void insertFormula( FormulaCursor* );
/**
* Calculates our width and height and
* our tqchildren's parentPosition.
*/
virtual void calcSizes( const ContextStyle& context,
ContextStyle::TextStyle tstyle,
ContextStyle::IndexStyle istyle,
StyleAttributes& style );
/**
* Draws the whole element including its tqchildren.
* The `parentOrigin' is the point this element's parent starts.
* We can use our parentPosition to get our own origin then.
*/
virtual void draw( TQPainter& painter, const LuPixelRect& r,
const ContextStyle& context,
ContextStyle::TextStyle tstyle,
ContextStyle::IndexStyle istyle,
StyleAttributes& style,
const LuPixelPoint& parentOrigin );
/**
* Calculates the formulas sizes and positions.
*/
void calcSizes( ContextStyle& context );
/**
* Draws the whole thing.
*/
void draw( TQPainter& painter, const LuPixelRect& r, ContextStyle& context );
/**
* This is called by the container to get a command depending on
* the current cursor position (this is how the element gets chosen)
* and the request.
*
* @returns the command that performs the requested action with
* the containers active cursor.
*/
virtual KCommand* buildCommand( Container*, Request* );
/**
* @returns our documents symbol table
*/
const SymbolTable& getSymbolTable() const;
/**
* @returns the latex representation of the element and
* of the element's tqchildren
*/
virtual TQString toLatex();
int getBaseSize() const { return baseSize; }
void setBaseSize( int size );
bool hasOwnBaseSize() const { return ownBaseSize; }
virtual KCommand* input( Container* container, TQKeyEvent* event );
virtual void writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat = false ) const ;
/**
* Appends our attributes to the dom element.
*/
virtual void writeDom(TQDomElement element);
/**
* For copy&paste we need to create an empty XML element.
*/
TQDomElement emptyFormulaElement( TQDomDocument& doc );
protected:
//Save/load support
/**
* Returns the tag name of this element type.
*/
virtual TQString getTagName() const { return "FORMULA"; }
/**
* Reads our attributes from the element.
* Returns false if it failed.
*/
virtual bool readAttributesFromDom(TQDomElement element);
/**
* Reads our content from the node. Sets the node to the next node
* that needs to be read.
* Returns false if it failed.
*/
virtual bool readContentFromDom(TQDomNode& node);
private:
/**
* The introduction of 'NameSequence' changed the DOM.
* However, we need to read the old version.
*/
void convertNames( TQDomNode node );
/**
* The document that owns (is) this formula.
*/
FormulaDocument* document;
/**
* The base font size.
*/
int baseSize;
/**
* Whether we want to use the default base size.
*/
bool ownBaseSize;
};
KFORMULA_NAMESPACE_END
#endif // FORMULAELEMENT_H
|
