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Diffstat (limited to 'src/gui/text/qabstracttextdocumentlayout.h')
-rw-r--r-- | src/gui/text/qabstracttextdocumentlayout.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/gui/text/qabstracttextdocumentlayout.h b/src/gui/text/qabstracttextdocumentlayout.h new file mode 100644 index 0000000..4c376cc --- /dev/null +++ b/src/gui/text/qabstracttextdocumentlayout.h @@ -0,0 +1,149 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 qt-sales@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 |