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151 lines
5.2 KiB
151 lines
5.2 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QABSTRACTTEXTDOCUMENTLAYOUT_H
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#define QABSTRACTTEXTDOCUMENTLAYOUT_H
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#include <QtCore/qobject.h>
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#include <QtGui/qtextlayout.h>
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#include <QtGui/qtextdocument.h>
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#include <QtGui/qtextcursor.h>
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#include <QtGui/qpalette.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Gui)
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class QAbstractTextDocumentLayoutPrivate;
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class QTextBlock;
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class QTextObjectInterface;
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class QTextFrame;
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class Q_GUI_EXPORT QAbstractTextDocumentLayout : public QObject
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{
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Q_OBJECT
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Q_DECLARE_PRIVATE(QAbstractTextDocumentLayout)
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public:
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explicit QAbstractTextDocumentLayout(QTextDocument *doc);
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~QAbstractTextDocumentLayout();
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struct Selection
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{
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QTextCursor cursor;
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QTextCharFormat format;
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};
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struct PaintContext
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{
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PaintContext()
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: cursorPosition(-1)
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{}
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int cursorPosition;
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QPalette palette;
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QRectF clip;
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QVector<Selection> selections;
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};
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virtual void draw(QPainter *painter, const PaintContext &context) = 0;
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virtual int hitTest(const QPointF &point, Qt::HitTestAccuracy accuracy) const = 0;
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QString anchorAt(const QPointF& pos) const;
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virtual int pageCount() const = 0;
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virtual QSizeF documentSize() const = 0;
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virtual QRectF frameBoundingRect(QTextFrame *frame) const = 0;
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virtual QRectF blockBoundingRect(const QTextBlock &block) const = 0;
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void setPaintDevice(QPaintDevice *device);
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QPaintDevice *paintDevice() const;
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QTextDocument *document() const;
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void registerHandler(int objectType, QObject *component);
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QTextObjectInterface *handlerForObject(int objectType) const;
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Q_SIGNALS:
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void update(const QRectF & = QRectF(0., 0., 1000000000., 1000000000.));
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void updateBlock(const QTextBlock &block);
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void documentSizeChanged(const QSizeF &newSize);
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void pageCountChanged(int newPages);
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protected:
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QAbstractTextDocumentLayout(QAbstractTextDocumentLayoutPrivate &, QTextDocument *);
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virtual void documentChanged(int from, int charsRemoved, int charsAdded) = 0;
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virtual void resizeInlineObject(QTextInlineObject item, int posInDocument, const QTextFormat &format);
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virtual void positionInlineObject(QTextInlineObject item, int posInDocument, const QTextFormat &format);
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virtual void drawInlineObject(QPainter *painter, const QRectF &rect, QTextInlineObject object, int posInDocument, const QTextFormat &format);
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int formatIndex(int pos);
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QTextCharFormat format(int pos);
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private:
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friend class QTextControl;
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friend class QTextDocument;
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friend class QTextDocumentPrivate;
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friend class QTextEngine;
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friend class QTextLayout;
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friend class QTextLine;
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Q_PRIVATE_SLOT(d_func(), void _q_handlerDestroyed(QObject *obj))
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Q_PRIVATE_SLOT(d_func(), int _q_dynamicPageCountSlot())
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Q_PRIVATE_SLOT(d_func(), QSizeF _q_dynamicDocumentSizeSlot())
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};
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class Q_GUI_EXPORT QTextObjectInterface
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{
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public:
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virtual ~QTextObjectInterface() {}
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virtual QSizeF intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format) = 0;
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virtual void drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format) = 0;
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};
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Q_DECLARE_INTERFACE(QTextObjectInterface, "com.trolltech.Qt.QTextObjectInterface")
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QABSTRACTTEXTDOCUMENTLAYOUT_H
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