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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 Technology Preview License Agreement accompanying
** this package.
**
** 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QABSTRACTTEXTDOCUMENTLAYOUT_H
#define QABSTRACTTEXTDOCUMENTLAYOUT_H
#include <QtCore/qobject.h>
#include <QtGui/qtextlayout.h>
#include <QtGui/qtextdocument.h>
#include <QtGui/qtextcursor.h>
#include <QtGui/qpalette.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QAbstractTextDocumentLayoutPrivate;
class QTextBlock;
class QTextObjectInterface;
class QTextFrame;
class Q_GUI_EXPORT QAbstractTextDocumentLayout : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QAbstractTextDocumentLayout)
public:
explicit QAbstractTextDocumentLayout(QTextDocument *doc);
~QAbstractTextDocumentLayout();
struct Selection
{
QTextCursor cursor;
QTextCharFormat format;
};
struct PaintContext
{
PaintContext()
: cursorPosition(-1)
{}
int cursorPosition;
QPalette palette;
QRectF clip;
QVector<Selection> selections;
};
virtual void draw(QPainter *painter, const PaintContext &context) = 0;
virtual int hitTest(const QPointF &point, Qt::HitTestAccuracy accuracy) const = 0;
QString anchorAt(const QPointF& pos) const;
virtual int pageCount() const = 0;
virtual QSizeF documentSize() const = 0;
virtual QRectF frameBoundingRect(QTextFrame *frame) const = 0;
virtual QRectF blockBoundingRect(const QTextBlock &block) const = 0;
void setPaintDevice(QPaintDevice *device);
QPaintDevice *paintDevice() const;
QTextDocument *document() const;
void registerHandler(int objectType, QObject *component);
QTextObjectInterface *handlerForObject(int objectType) const;
Q_SIGNALS:
void update(const QRectF & = QRectF(0., 0., 1000000000., 1000000000.));
void updateBlock(const QTextBlock &block);
void documentSizeChanged(const QSizeF &newSize);
void pageCountChanged(int newPages);
protected:
QAbstractTextDocumentLayout(QAbstractTextDocumentLayoutPrivate &, QTextDocument *);
virtual void documentChanged(int from, int charsRemoved, int charsAdded) = 0;
virtual void resizeInlineObject(QTextInlineObject item, int posInDocument, const QTextFormat &format);
virtual void positionInlineObject(QTextInlineObject item, int posInDocument, const QTextFormat &format);
virtual void drawInlineObject(QPainter *painter, const QRectF &rect, QTextInlineObject object, int posInDocument, const QTextFormat &format);
int formatIndex(int pos);
QTextCharFormat format(int pos);
private:
friend class QTextDocument;
friend class QTextDocumentPrivate;
friend class QTextEngine;
friend class QTextLayout;
friend class QTextLine;
Q_PRIVATE_SLOT(d_func(), void _q_handlerDestroyed(QObject *obj))
Q_PRIVATE_SLOT(d_func(), int _q_dynamicPageCountSlot())
Q_PRIVATE_SLOT(d_func(), QSizeF _q_dynamicDocumentSizeSlot())
};
class Q_GUI_EXPORT QTextObjectInterface
{
public:
virtual ~QTextObjectInterface() {}
virtual QSizeF intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format) = 0;
virtual void drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format) = 0;
};
Q_DECLARE_INTERFACE(QTextObjectInterface, "com.trolltech.Qt.QTextObjectInterface")
QT_END_NAMESPACE
QT_END_HEADER
#endif // QABSTRACTTEXTDOCUMENTLAYOUT_H
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