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| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
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| ** This file is part of the QtGui module of the Qt Toolkit. |
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| |
| #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_NAMESPACE |
| |
| |
| 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); |
| void unregisterHandler(int objectType, QObject *component = 0); |
| 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 QWidgetTextControl; |
| 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, "org.qt-project.Qt.QTextObjectInterface") |
| |
| QT_END_NAMESPACE |
| |
| #endif // QABSTRACTTEXTDOCUMENTLAYOUT_H |