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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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 are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#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 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
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