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
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTEXTLAYOUT_H
#define QTEXTLAYOUT_H
#include <QtCore/qstring.h>
#include <QtCore/qnamespace.h>
#include <QtCore/qrect.h>
#include <QtCore/qvector.h>
#include <QtGui/qcolor.h>
#include <QtCore/qobject.h>
#include <QtGui/qevent.h>
#include <QtGui/qtextformat.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QTextEngine;
class QFont;
class QRect;
class QRegion;
class QTextFormat;
class QPalette;
class QPainter;
class Q_GUI_EXPORT QTextInlineObject
{
public:
QTextInlineObject(int i, QTextEngine *e) : itm(i), eng(e) {}
inline QTextInlineObject() : itm(0), eng(0) {}
inline bool isValid() const { return eng; }
QRectF rect() const;
qreal width() const;
qreal ascent() const;
qreal descent() const;
qreal height() const;
Qt::LayoutDirection textDirection() const;
void setWidth(qreal w);
void setAscent(qreal a);
void setDescent(qreal d);
int textPosition() const;
int formatIndex() const;
QTextFormat format() const;
private:
friend class QTextLayout;
int itm;
QTextEngine *eng;
};
class QPaintDevice;
class QTextFormat;
class QTextLine;
class QTextBlock;
class QTextOption;
class Q_GUI_EXPORT QTextLayout
{
public:
// does itemization
QTextLayout();
QTextLayout(const QString& text);
QTextLayout(const QString& text, const QFont &font, QPaintDevice *paintdevice = 0);
QTextLayout(const QTextBlock &b);
~QTextLayout();
void setFont(const QFont &f);
QFont font() const;
void setText(const QString& string);
QString text() const;
void setTextOption(const QTextOption &option);
QTextOption textOption() const;
void setPreeditArea(int position, const QString &text);
int preeditAreaPosition() const;
QString preeditAreaText() const;
struct FormatRange {
int start;
int length;
QTextCharFormat format;
};
void setAdditionalFormats(const QList<FormatRange> &overrides);
QList<FormatRange> additionalFormats() const;
void clearAdditionalFormats();
void setCacheEnabled(bool enable);
bool cacheEnabled() const;
void beginLayout();
void endLayout();
void clearLayout();
QTextLine createLine();
int lineCount() const;
QTextLine lineAt(int i) const;
QTextLine lineForTextPosition(int pos) const;
enum CursorMode {
SkipCharacters,
SkipWords
};
bool isValidCursorPosition(int pos) const;
int nextCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const;
int previousCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const;
void draw(QPainter *p, const QPointF &pos, const QVector<FormatRange> &selections = QVector<FormatRange>(),
const QRectF &clip = QRectF()) const;
void drawCursor(QPainter *p, const QPointF &pos, int cursorPosition) const;
void drawCursor(QPainter *p, const QPointF &pos, int cursorPosition, int width) const;
QPointF position() const;
void setPosition(const QPointF &p);
QRectF boundingRect() const;
qreal minimumWidth() const;
qreal maximumWidth() const;
QTextEngine *engine() const { return d; }
void setFlags(int flags);
private:
QTextLayout(QTextEngine *e) : d(e) {}
Q_DISABLE_COPY(QTextLayout)
friend class QPainter;
friend class QPSPrinter;
friend class QGraphicsSimpleTextItemPrivate;
friend class QGraphicsSimpleTextItem;
friend void qt_format_text(const QFont &font, const QRectF &_r, int tf, const QTextOption *, const QString& str,
QRectF *brect, int tabstops, int* tabarray, int tabarraylen,
QPainter *painter);
QTextEngine *d;
};
class Q_GUI_EXPORT QTextLine
{
public:
inline QTextLine() : i(0), eng(0) {}
inline bool isValid() const { return eng; }
QRectF rect() const;
qreal x() const;
qreal y() const;
qreal width() const;
qreal ascent() const;
qreal descent() const;
qreal height() const;
qreal leading() const;
void setLeadingIncluded(bool included);
bool leadingIncluded() const;
qreal naturalTextWidth() const;
QRectF naturalTextRect() const;
enum Edge {
Leading,
Trailing
};
enum CursorPosition {
CursorBetweenCharacters,
CursorOnCharacter
};
/* cursorPos gets set to the valid position */
qreal cursorToX(int *cursorPos, Edge edge = Leading) const;
inline qreal cursorToX(int cursorPos, Edge edge = Leading) const { return cursorToX(&cursorPos, edge); }
int xToCursor(qreal x, CursorPosition = CursorBetweenCharacters) const;
void setLineWidth(qreal width);
void setNumColumns(int columns);
void setNumColumns(int columns, qreal alignmentWidth);
void setPosition(const QPointF &pos);
QPointF position() const;
int textStart() const;
int textLength() const;
int lineNumber() const { return i; }
void draw(QPainter *p, const QPointF &point, const QTextLayout::FormatRange *selection = 0) const;
private:
QTextLine(int line, QTextEngine *e) : i(line), eng(e) {}
void layout_helper(int numGlyphs);
friend class QTextLayout;
int i;
QTextEngine *eng;
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QTEXTLAYOUT_H
|
