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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (developer.feedback@nokia.com) |
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6 ** |
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7 ** This file is part of the HbWidgets module of the UI Extensions for Mobile. |
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8 ** |
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9 ** GNU Lesser General Public License Usage |
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10 ** This file may be used under the terms of the GNU Lesser General Public |
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11 ** License version 2.1 as published by the Free Software Foundation and |
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12 ** appearing in the file LICENSE.LGPL included in the packaging of this file. |
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13 ** Please review the following information to ensure the GNU Lesser General |
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14 ** Public License version 2.1 requirements will be met: |
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15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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16 ** |
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17 ** In addition, as a special exception, Nokia gives you certain additional |
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18 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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20 ** |
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21 ** If you have questions regarding the use of this file, please contact |
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22 ** Nokia at developer.feedback@nokia.com. |
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23 ** |
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24 ****************************************************************************/ |
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25 |
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26 // |
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27 // W A R N I N G |
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28 // ------------- |
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29 // |
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30 // This file is not part of the Hb API. It exists purely as an |
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31 // implementation detail. This file may change from version to |
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32 // version without notice, or even be removed. |
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33 // |
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34 // We mean it. |
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35 // |
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36 #include <QTextBlock> |
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37 #include "hbtextedit_p.h" |
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38 #include "hbtextedit.h" |
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39 #include "hbcolorscheme.h" |
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40 #include <QtDebug> |
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41 |
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42 HbTextEditPrivate::HbTextEditPrivate () : |
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43 HbAbstractEditPrivate(), |
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44 mShowTextBaseLine(true) |
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45 { |
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46 } |
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47 |
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48 HbTextEditPrivate::~HbTextEditPrivate () |
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49 { |
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50 } |
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51 |
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52 void HbTextEditPrivate::init() |
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53 { |
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54 Q_Q(HbTextEdit); |
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55 |
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56 mTextBaseLinePen.setColor(Qt::magenta); |
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57 mTextBaseLinePen.setCapStyle(Qt::RoundCap); |
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58 mTextBaseLinePen.setWidthF((qreal)1.0); |
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59 |
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60 q->setScrollable(true); |
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61 doc->documentLayout()->document()->setDocumentMargin(0); |
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62 q->setBackgroundItem(HbStyle::P_TextEdit_frame_normal); |
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63 } |
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64 |
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65 void HbTextEditPrivate::updatePaletteFromTheme() |
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66 { |
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67 HbAbstractEditPrivate::updatePaletteFromTheme(); |
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68 Q_Q(HbTextEdit); |
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69 |
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70 QColor textColor = HbColorScheme::color("qtc_textedit_normal"); |
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71 QColor selectedColor = HbColorScheme::color("qtc_textedit_selected"); |
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72 QColor selectedBackground = HbColorScheme::color("qtc_textedit_marker_normal"); |
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73 QPalette pal = q->palette(); |
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74 |
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75 if (textColor.isValid()) { |
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76 pal.setColor(QPalette::Text, textColor); |
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77 } |
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78 |
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79 if (selectedColor.isValid()) { |
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80 pal.setColor(QPalette::HighlightedText, selectedColor); |
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81 } |
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82 |
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83 if (selectedBackground.isValid()) { |
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84 pal.setColor(QPalette::Highlight, selectedBackground); |
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85 } |
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86 q->setPalette(pal); |
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87 } |
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88 |
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89 void HbTextEditPrivate::updateEditingSize() |
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90 { |
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91 Q_Q(HbTextEdit); |
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92 if (scrollArea) { |
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93 scrollArea->setMinimumHeight(QFontMetrics(q->font()).height()); |
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94 scrollArea->setPreferredHeight(doc->documentLayout()->documentSize().height()); |
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95 scrollArea->setMaximumHeight(QWIDGETSIZE_MAX); |
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96 } |
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97 } |
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98 |
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99 /* |
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100 * \reimp |
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101 * |
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102 */ |
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103 void HbTextEditPrivate::drawContentBackground(QPainter *painter, |
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104 const QStyleOptionGraphicsItem &) const |
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105 { |
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106 if(mShowTextBaseLine) { |
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107 drawTextBaseLines(painter); |
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108 } |
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109 } |
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110 |
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111 /* |
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112 * @proto |
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113 * this method draws base lines for text |
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114 */ |
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115 void HbTextEditPrivate::drawTextBaseLines(QPainter *painter) const |
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116 { |
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117 const QRegion clipReg = painter->clipRegion(); |
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118 |
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119 painter->setPen(mTextBaseLinePen); |
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120 |
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121 const QAbstractTextDocumentLayout* const docLayout = doc->documentLayout(); |
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122 |
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123 QRectF lineRect; |
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124 qreal lastAscent((qreal)0.0); |
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125 |
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126 // iterate through paragraphs |
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127 QTextBlock textBlock = doc->begin(); |
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128 for(;textBlock.isValid(); textBlock = textBlock.next() ) { |
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129 QRectF blockRect = docLayout->blockBoundingRect(textBlock); |
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130 |
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131 if(!clipReg.intersects(blockRect.toRect())) { |
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132 continue; // dont try to draw unneeded paragraphs |
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133 } |
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134 // iterate through lines of paragraph |
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135 const int n = textBlock.layout()->lineCount(); |
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136 for( int i=0; i<n; ++i ){ |
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137 QTextLine line = textBlock.layout()->lineAt(i); |
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138 |
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139 lineRect = line.rect(); |
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140 lineRect.translate(blockRect.topLeft()); |
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141 lastAscent = line.ascent(); |
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142 drawBaseLineAt(painter, lineRect.left(), lineRect.right(), lineRect.top()+lastAscent); |
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143 } // end of for loop: iterate through lines |
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144 |
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145 } // end of for loop: iterate through paragraphs |
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146 |
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147 // try draw extra lines where ther is no text enymore |
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148 if(!lineRect.isEmpty()) { // last paragraph was drawn |
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149 lineRect.translate(0,lineRect.height()); |
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150 while(lineRect.top()<=canvas->size().height()) { |
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151 drawBaseLineAt(painter, lineRect.left(), lineRect.right(), lineRect.top()+lastAscent); |
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152 lineRect.translate(0,lineRect.height()); |
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153 } |
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154 } |
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155 } |
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156 |
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157 /* |
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158 * @proto |
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159 * draws on \a painter single base line for one line text bounded by \a rect |
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160 */ |
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161 void HbTextEditPrivate::drawBaseLineAt(QPainter *painter, |
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162 qreal x1, qreal x2, qreal y) const |
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163 { |
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164 painter->drawLine(QPointF(x1,y), QPointF(x2,y)); |
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165 } |