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248 lines
7.1 KiB
248 lines
7.1 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 QTEXTLAYOUT_H
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#define QTEXTLAYOUT_H
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#include <QtCore/qstring.h>
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#include <QtCore/qnamespace.h>
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#include <QtCore/qrect.h>
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#include <QtCore/qvector.h>
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#include <QtGui/qcolor.h>
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#include <QtCore/qobject.h>
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#include <QtGui/qevent.h>
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#include <QtGui/qtextformat.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 QTextEngine;
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class QFont;
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class QRect;
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class QRegion;
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class QTextFormat;
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class QPalette;
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class QPainter;
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class Q_GUI_EXPORT QTextInlineObject
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{
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public:
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QTextInlineObject(int i, QTextEngine *e) : itm(i), eng(e) {}
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inline QTextInlineObject() : itm(0), eng(0) {}
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inline bool isValid() const { return eng; }
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QRectF rect() const;
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qreal width() const;
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qreal ascent() const;
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qreal descent() const;
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qreal height() const;
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Qt::LayoutDirection textDirection() const;
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void setWidth(qreal w);
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void setAscent(qreal a);
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void setDescent(qreal d);
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int textPosition() const;
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int formatIndex() const;
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QTextFormat format() const;
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private:
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friend class QTextLayout;
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int itm;
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QTextEngine *eng;
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};
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class QPaintDevice;
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class QTextFormat;
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class QTextLine;
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class QTextBlock;
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class QTextOption;
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class Q_GUI_EXPORT QTextLayout
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{
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public:
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// does itemization
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QTextLayout();
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QTextLayout(const QString& text);
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QTextLayout(const QString& text, const QFont &font, QPaintDevice *paintdevice = 0);
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QTextLayout(const QTextBlock &b);
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~QTextLayout();
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void setFont(const QFont &f);
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QFont font() const;
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void setText(const QString& string);
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QString text() const;
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void setTextOption(const QTextOption &option);
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QTextOption textOption() const;
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void setPreeditArea(int position, const QString &text);
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int preeditAreaPosition() const;
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QString preeditAreaText() const;
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struct FormatRange {
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int start;
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int length;
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QTextCharFormat format;
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};
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void setAdditionalFormats(const QList<FormatRange> &overrides);
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QList<FormatRange> additionalFormats() const;
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void clearAdditionalFormats();
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void setCacheEnabled(bool enable);
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bool cacheEnabled() const;
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void beginLayout();
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void endLayout();
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void clearLayout();
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QTextLine createLine();
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int lineCount() const;
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QTextLine lineAt(int i) const;
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QTextLine lineForTextPosition(int pos) const;
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enum CursorMode {
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SkipCharacters,
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SkipWords
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};
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bool isValidCursorPosition(int pos) const;
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int nextCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const;
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int previousCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const;
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void draw(QPainter *p, const QPointF &pos, const QVector<FormatRange> &selections = QVector<FormatRange>(),
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const QRectF &clip = QRectF()) const;
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void drawCursor(QPainter *p, const QPointF &pos, int cursorPosition) const;
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void drawCursor(QPainter *p, const QPointF &pos, int cursorPosition, int width) const;
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QPointF position() const;
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void setPosition(const QPointF &p);
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QRectF boundingRect() const;
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qreal minimumWidth() const;
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qreal maximumWidth() const;
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QTextEngine *engine() const { return d; }
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void setFlags(int flags);
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private:
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QTextLayout(QTextEngine *e) : d(e) {}
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Q_DISABLE_COPY(QTextLayout)
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friend class QPainter;
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friend class QPSPrinter;
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friend class QGraphicsSimpleTextItemPrivate;
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friend class QGraphicsSimpleTextItem;
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friend void qt_format_text(const QFont &font, const QRectF &_r, int tf, const QTextOption *, const QString& str,
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QRectF *brect, int tabstops, int* tabarray, int tabarraylen,
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QPainter *painter);
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QTextEngine *d;
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};
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class Q_GUI_EXPORT QTextLine
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{
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public:
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inline QTextLine() : i(0), eng(0) {}
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inline bool isValid() const { return eng; }
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QRectF rect() const;
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qreal x() const;
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qreal y() const;
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qreal width() const;
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qreal ascent() const;
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qreal descent() const;
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qreal height() const;
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qreal leading() const;
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void setLeadingIncluded(bool included);
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bool leadingIncluded() const;
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qreal naturalTextWidth() const;
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QRectF naturalTextRect() const;
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enum Edge {
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Leading,
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Trailing
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};
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enum CursorPosition {
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CursorBetweenCharacters,
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CursorOnCharacter
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};
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/* cursorPos gets set to the valid position */
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qreal cursorToX(int *cursorPos, Edge edge = Leading) const;
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inline qreal cursorToX(int cursorPos, Edge edge = Leading) const { return cursorToX(&cursorPos, edge); }
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int xToCursor(qreal x, CursorPosition = CursorBetweenCharacters) const;
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void setLineWidth(qreal width);
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void setNumColumns(int columns);
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void setNumColumns(int columns, qreal alignmentWidth);
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void setPosition(const QPointF &pos);
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QPointF position() const;
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int textStart() const;
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int textLength() const;
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int lineNumber() const { return i; }
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void draw(QPainter *p, const QPointF &point, const QTextLayout::FormatRange *selection = 0) const;
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private:
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QTextLine(int line, QTextEngine *e) : i(line), eng(e) {}
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void layout_helper(int numGlyphs);
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friend class QTextLayout;
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int i;
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QTextEngine *eng;
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};
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QTEXTLAYOUT_H
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