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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 #ifndef QTEXTLAYOUT_H |
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42 #define QTEXTLAYOUT_H |
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43 |
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44 #include <QtCore/qstring.h> |
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45 #include <QtCore/qnamespace.h> |
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46 #include <QtCore/qrect.h> |
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47 #include <QtCore/qvector.h> |
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48 #include <QtGui/qcolor.h> |
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49 #include <QtCore/qobject.h> |
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50 #include <QtGui/qevent.h> |
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51 #include <QtGui/qtextformat.h> |
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52 |
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53 QT_BEGIN_HEADER |
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54 |
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55 QT_BEGIN_NAMESPACE |
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56 |
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57 QT_MODULE(Gui) |
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58 |
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59 class QTextEngine; |
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60 class QFont; |
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61 class QRect; |
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62 class QRegion; |
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63 class QTextFormat; |
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64 class QPalette; |
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65 class QPainter; |
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66 |
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67 class Q_GUI_EXPORT QTextInlineObject |
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68 { |
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69 public: |
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70 QTextInlineObject(int i, QTextEngine *e) : itm(i), eng(e) {} |
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71 inline QTextInlineObject() : itm(0), eng(0) {} |
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72 inline bool isValid() const { return eng; } |
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73 |
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74 QRectF rect() const; |
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75 qreal width() const; |
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76 qreal ascent() const; |
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77 qreal descent() const; |
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78 qreal height() const; |
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79 |
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80 Qt::LayoutDirection textDirection() const; |
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81 |
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82 void setWidth(qreal w); |
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83 void setAscent(qreal a); |
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84 void setDescent(qreal d); |
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85 |
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86 int textPosition() const; |
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87 |
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88 int formatIndex() const; |
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89 QTextFormat format() const; |
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90 |
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91 private: |
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92 friend class QTextLayout; |
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93 int itm; |
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94 QTextEngine *eng; |
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95 }; |
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96 |
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97 class QPaintDevice; |
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98 class QTextFormat; |
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99 class QTextLine; |
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100 class QTextBlock; |
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101 class QTextOption; |
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102 |
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103 class Q_GUI_EXPORT QTextLayout |
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104 { |
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105 public: |
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106 // does itemization |
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107 QTextLayout(); |
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108 QTextLayout(const QString& text); |
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109 QTextLayout(const QString& text, const QFont &font, QPaintDevice *paintdevice = 0); |
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110 QTextLayout(const QTextBlock &b); |
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111 ~QTextLayout(); |
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112 |
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113 void setFont(const QFont &f); |
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114 QFont font() const; |
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115 |
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116 void setText(const QString& string); |
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117 QString text() const; |
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118 |
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119 void setTextOption(const QTextOption &option); |
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120 QTextOption textOption() const; |
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121 |
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122 void setPreeditArea(int position, const QString &text); |
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123 int preeditAreaPosition() const; |
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124 QString preeditAreaText() const; |
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125 |
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126 struct FormatRange { |
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127 int start; |
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128 int length; |
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129 QTextCharFormat format; |
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130 }; |
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131 void setAdditionalFormats(const QList<FormatRange> &overrides); |
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132 QList<FormatRange> additionalFormats() const; |
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133 void clearAdditionalFormats(); |
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134 |
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135 void setCacheEnabled(bool enable); |
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136 bool cacheEnabled() const; |
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137 |
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138 void beginLayout(); |
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139 void endLayout(); |
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140 void clearLayout(); |
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141 |
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142 QTextLine createLine(); |
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143 |
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144 int lineCount() const; |
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145 QTextLine lineAt(int i) const; |
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146 QTextLine lineForTextPosition(int pos) const; |
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147 |
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148 enum CursorMode { |
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149 SkipCharacters, |
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150 SkipWords |
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151 }; |
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152 bool isValidCursorPosition(int pos) const; |
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153 int nextCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const; |
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154 int previousCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const; |
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155 |
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156 void draw(QPainter *p, const QPointF &pos, const QVector<FormatRange> &selections = QVector<FormatRange>(), |
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157 const QRectF &clip = QRectF()) const; |
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158 void drawCursor(QPainter *p, const QPointF &pos, int cursorPosition) const; |
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159 void drawCursor(QPainter *p, const QPointF &pos, int cursorPosition, int width) const; |
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160 |
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161 QPointF position() const; |
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162 void setPosition(const QPointF &p); |
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163 |
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164 QRectF boundingRect() const; |
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165 |
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166 qreal minimumWidth() const; |
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167 qreal maximumWidth() const; |
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168 |
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169 QTextEngine *engine() const { return d; } |
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170 void setFlags(int flags); |
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171 private: |
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172 QTextLayout(QTextEngine *e) : d(e) {} |
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173 Q_DISABLE_COPY(QTextLayout) |
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174 |
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175 friend class QPainter; |
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176 friend class QPSPrinter; |
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177 friend class QGraphicsSimpleTextItemPrivate; |
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178 friend class QGraphicsSimpleTextItem; |
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179 friend void qt_format_text(const QFont &font, const QRectF &_r, int tf, const QTextOption *, const QString& str, |
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180 QRectF *brect, int tabstops, int* tabarray, int tabarraylen, |
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181 QPainter *painter); |
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182 QTextEngine *d; |
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183 }; |
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184 |
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185 |
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186 class Q_GUI_EXPORT QTextLine |
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187 { |
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188 public: |
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189 inline QTextLine() : i(0), eng(0) {} |
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190 inline bool isValid() const { return eng; } |
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191 |
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192 QRectF rect() const; |
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193 qreal x() const; |
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194 qreal y() const; |
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195 qreal width() const; |
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196 qreal ascent() const; |
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197 qreal descent() const; |
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198 qreal height() const; |
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199 |
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200 qreal naturalTextWidth() const; |
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201 QRectF naturalTextRect() const; |
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202 |
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203 enum Edge { |
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204 Leading, |
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205 Trailing |
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206 }; |
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207 enum CursorPosition { |
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208 CursorBetweenCharacters, |
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209 CursorOnCharacter |
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210 }; |
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211 |
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212 /* cursorPos gets set to the valid position */ |
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213 qreal cursorToX(int *cursorPos, Edge edge = Leading) const; |
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214 inline qreal cursorToX(int cursorPos, Edge edge = Leading) const { return cursorToX(&cursorPos, edge); } |
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215 int xToCursor(qreal x, CursorPosition = CursorBetweenCharacters) const; |
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216 |
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217 void setLineWidth(qreal width); |
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218 void setNumColumns(int columns); |
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219 void setNumColumns(int columns, qreal alignmentWidth); |
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220 |
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221 void setPosition(const QPointF &pos); |
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222 QPointF position() const; |
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223 |
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224 int textStart() const; |
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225 int textLength() const; |
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226 |
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227 int lineNumber() const { return i; } |
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228 |
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229 void draw(QPainter *p, const QPointF &point, const QTextLayout::FormatRange *selection = 0) const; |
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230 |
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231 private: |
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232 QTextLine(int line, QTextEngine *e) : i(line), eng(e) {} |
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233 void layout_helper(int numGlyphs); |
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234 friend class QTextLayout; |
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235 int i; |
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236 QTextEngine *eng; |
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237 }; |
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238 |
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239 QT_END_NAMESPACE |
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240 |
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241 QT_END_HEADER |
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242 |
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243 #endif // QTEXTLAYOUT_H |