1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2010 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 | ** Commercial Usage
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11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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12 | ** accordance with the Qt Commercial License Agreement provided with the
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13 | ** Software or, alternatively, in accordance with the terms contained in
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14 | ** a written agreement between you and Nokia.
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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 | ** GNU General Public License Usage
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29 | ** Alternatively, this file may be used under the terms of the GNU
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30 | ** General Public License version 3.0 as published by the Free Software
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31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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32 | ** packaging of this file. Please review the following information to
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33 | ** ensure the GNU General Public License version 3.0 requirements will be
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34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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35 | **
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36 | ** If you have questions regarding the use of this file, please contact
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37 | ** Nokia at qt-info@nokia.com.
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38 | ** $QT_END_LICENSE$
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39 | **
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40 | ****************************************************************************/
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41 |
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42 | #include "qprintpreviewwidget.h"
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43 | #include "private/qwidget_p.h"
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44 | #include <private/qprinter_p.h>
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45 |
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46 | #include <QtCore/qmath.h>
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47 | #include <QtGui/qboxlayout.h>
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48 | #include <QtGui/qgraphicsitem.h>
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49 | #include <QtGui/qgraphicsview.h>
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50 | #include <QtGui/qscrollbar.h>
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51 | #include <QtGui/qstyleoption.h>
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52 |
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53 | #ifndef QT_NO_PRINTPREVIEWWIDGET
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54 |
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55 | QT_BEGIN_NAMESPACE
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56 |
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57 | namespace {
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58 | class PageItem : public QGraphicsItem
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59 | {
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60 | public:
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61 | PageItem(int _pageNum, const QPicture* _pagePicture, QSize _paperSize, QRect _pageRect)
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62 | : pageNum(_pageNum), pagePicture(_pagePicture),
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63 | paperSize(_paperSize), pageRect(_pageRect)
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64 | {
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65 | qreal border = qMax(paperSize.height(), paperSize.width()) / 25;
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66 | brect = QRectF(QPointF(-border, -border),
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67 | QSizeF(paperSize)+QSizeF(2*border, 2*border));
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68 | setCacheMode(DeviceCoordinateCache);
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69 | }
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70 |
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71 | inline QRectF boundingRect() const
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72 | { return brect; }
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73 |
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74 | inline int pageNumber() const
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75 | { return pageNum; }
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76 |
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77 | void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget);
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78 |
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79 | private:
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80 | int pageNum;
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81 | const QPicture* pagePicture;
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82 | QSize paperSize;
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83 | QRect pageRect;
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84 | QRectF brect;
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85 | };
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86 |
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87 | void PageItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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88 | {
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89 | Q_UNUSED(widget);
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90 |
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91 | #if 0
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92 | // Draw item bounding rect, for debugging
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93 | painter->save();
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94 | painter->setPen(QPen(Qt::red, 0));
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95 | painter->setBrush(Qt::NoBrush);
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96 | painter->drawRect(QRectF(-border()+1.0, -border()+1.0, boundingRect().width()-2, boundingRect().height()-2));
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97 | painter->restore();
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98 | #endif
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99 |
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100 | QRectF paperRect(0,0, paperSize.width(), paperSize.height());
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101 |
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102 | // Draw shadow
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103 | painter->setClipRect(option->exposedRect);
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104 | qreal shWidth = paperRect.width()/100;
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105 | QRectF rshadow(paperRect.topRight() + QPointF(0, shWidth),
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106 | paperRect.bottomRight() + QPointF(shWidth, 0));
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107 | QLinearGradient rgrad(rshadow.topLeft(), rshadow.topRight());
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108 | rgrad.setColorAt(0.0, QColor(0,0,0,255));
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109 | rgrad.setColorAt(1.0, QColor(0,0,0,0));
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110 | painter->fillRect(rshadow, QBrush(rgrad));
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111 | QRectF bshadow(paperRect.bottomLeft() + QPointF(shWidth, 0),
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112 | paperRect.bottomRight() + QPointF(0, shWidth));
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113 | QLinearGradient bgrad(bshadow.topLeft(), bshadow.bottomLeft());
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114 | bgrad.setColorAt(0.0, QColor(0,0,0,255));
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115 | bgrad.setColorAt(1.0, QColor(0,0,0,0));
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116 | painter->fillRect(bshadow, QBrush(bgrad));
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117 | QRectF cshadow(paperRect.bottomRight(),
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118 | paperRect.bottomRight() + QPointF(shWidth, shWidth));
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119 | QRadialGradient cgrad(cshadow.topLeft(), shWidth, cshadow.topLeft());
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120 | cgrad.setColorAt(0.0, QColor(0,0,0,255));
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121 | cgrad.setColorAt(1.0, QColor(0,0,0,0));
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122 | painter->fillRect(cshadow, QBrush(cgrad));
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123 |
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124 | painter->setClipRect(paperRect & option->exposedRect);
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125 | painter->fillRect(paperRect, Qt::white);
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126 | if (!pagePicture)
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127 | return;
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128 | painter->drawPicture(pageRect.topLeft(), *pagePicture);
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129 |
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130 | // Effect: make anything drawn in the margins look washed out.
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131 | QPainterPath path;
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132 | path.addRect(paperRect);
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133 | path.addRect(pageRect);
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134 | painter->setPen(QPen(Qt::NoPen));
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135 | painter->setBrush(QColor(255, 255, 255, 180));
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136 | painter->drawPath(path);
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137 |
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138 | #if 0
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139 | // Draw frame around paper.
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140 | painter->setPen(QPen(Qt::black, 0));
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141 | painter->setBrush(Qt::NoBrush);
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142 | painter->drawRect(paperRect);
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143 | #endif
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144 |
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145 | // todo: drawtext "Page N" below paper
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146 | }
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147 |
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148 | class GraphicsView : public QGraphicsView
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149 | {
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150 | Q_OBJECT
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151 | public:
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152 | GraphicsView(QWidget* parent = 0)
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153 | : QGraphicsView(parent)
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154 | {
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155 | #ifdef Q_WS_MAC
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156 | setFrameStyle(QFrame::NoFrame);
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157 | #endif
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158 | }
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159 | signals:
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160 | void resized();
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161 |
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162 | protected:
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163 | void resizeEvent(QResizeEvent* e)
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164 | {
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165 | QGraphicsView::resizeEvent(e);
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166 | emit resized();
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167 | }
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168 |
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169 | void showEvent(QShowEvent* e)
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170 | {
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171 | QGraphicsView::showEvent(e);
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172 | emit resized();
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173 | }
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174 | };
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175 |
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176 | } // anonymous namespace
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177 |
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178 | class QPrintPreviewWidgetPrivate : public QWidgetPrivate
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179 | {
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180 | Q_DECLARE_PUBLIC(QPrintPreviewWidget)
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181 | public:
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182 | QPrintPreviewWidgetPrivate()
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183 | : scene(0), curPage(1),
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184 | viewMode(QPrintPreviewWidget::SinglePageView),
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185 | zoomMode(QPrintPreviewWidget::FitInView),
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186 | zoomFactor(1), initialized(false), fitting(true)
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187 | {}
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188 |
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189 | // private slots
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190 | void _q_fit(bool doFitting = false);
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191 | void _q_updateCurrentPage();
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192 |
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193 | void init();
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194 | void populateScene();
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195 | void layoutPages();
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196 | void generatePreview();
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197 | void setCurrentPage(int pageNumber);
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198 | void zoom(qreal zoom);
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199 | void setZoomFactor(qreal zoomFactor);
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200 | int calcCurrentPage();
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201 |
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202 | GraphicsView *graphicsView;
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203 | QGraphicsScene *scene;
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204 |
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205 | int curPage;
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206 | QList<const QPicture *> pictures;
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207 | QList<QGraphicsItem *> pages;
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208 |
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209 | QPrintPreviewWidget::ViewMode viewMode;
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210 | QPrintPreviewWidget::ZoomMode zoomMode;
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211 | qreal zoomFactor;
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212 | bool ownPrinter;
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213 | QPrinter* printer;
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214 | bool initialized;
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215 | bool fitting;
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216 | };
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217 |
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218 | void QPrintPreviewWidgetPrivate::_q_fit(bool doFitting)
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219 | {
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220 | Q_Q(QPrintPreviewWidget);
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221 |
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222 | if (curPage < 1 || curPage > pages.count())
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223 | return;
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224 |
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225 | if (!doFitting && !fitting)
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226 | return;
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227 |
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228 | if (doFitting && fitting) {
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229 | QRect viewRect = graphicsView->viewport()->rect();
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230 | if (zoomMode == QPrintPreviewWidget::FitInView) {
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231 | QList<QGraphicsItem*> containedItems = graphicsView->items(viewRect, Qt::ContainsItemBoundingRect);
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232 | foreach(QGraphicsItem* item, containedItems) {
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233 | PageItem* pg = static_cast<PageItem*>(item);
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234 | if (pg->pageNumber() == curPage)
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235 | return;
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236 | }
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237 | }
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238 |
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239 | int newPage = calcCurrentPage();
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240 | if (newPage != curPage)
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241 | curPage = newPage;
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242 | }
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243 |
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244 | QRectF target = pages.at(curPage-1)->sceneBoundingRect();
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245 | if (viewMode == QPrintPreviewWidget::FacingPagesView) {
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246 | // fit two pages
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247 | if (curPage % 2)
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248 | target.setLeft(target.left() - target.width());
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249 | else
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250 | target.setRight(target.right() + target.width());
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251 | } else if (viewMode == QPrintPreviewWidget::AllPagesView) {
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252 | target = scene->itemsBoundingRect();
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253 | }
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254 |
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255 | if (zoomMode == QPrintPreviewWidget::FitToWidth) {
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256 | QTransform t;
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257 | qreal scale = graphicsView->viewport()->width() / target.width();
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258 | t.scale(scale, scale);
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259 | graphicsView->setTransform(t);
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260 | if (doFitting && fitting) {
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261 | QRectF viewSceneRect = graphicsView->viewportTransform().mapRect(graphicsView->viewport()->rect());
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262 | viewSceneRect.moveTop(target.top());
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263 | graphicsView->ensureVisible(viewSceneRect); // Nah...
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264 | }
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265 | } else {
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266 | graphicsView->fitInView(target, Qt::KeepAspectRatio);
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267 | if (zoomMode == QPrintPreviewWidget::FitInView) {
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268 | int step = qRound(graphicsView->matrix().mapRect(target).height());
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269 | graphicsView->verticalScrollBar()->setSingleStep(step);
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270 | graphicsView->verticalScrollBar()->setPageStep(step);
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271 | }
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272 | }
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273 |
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274 | zoomFactor = graphicsView->transform().m11() * (float(printer->logicalDpiY()) / q->logicalDpiY());
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275 | emit q->previewChanged();
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276 | }
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277 |
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278 | void QPrintPreviewWidgetPrivate::_q_updateCurrentPage()
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279 | {
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280 | Q_Q(QPrintPreviewWidget);
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281 |
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282 | if (viewMode == QPrintPreviewWidget::AllPagesView)
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283 | return;
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284 |
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285 | int newPage = calcCurrentPage();
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286 | if (newPage != curPage) {
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287 | curPage = newPage;
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288 | emit q->previewChanged();
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289 | }
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290 | }
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291 |
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292 | int QPrintPreviewWidgetPrivate::calcCurrentPage()
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293 | {
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294 | int maxArea = 0;
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295 | int newPage = curPage;
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296 | QRect viewRect = graphicsView->viewport()->rect();
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297 | QList<QGraphicsItem*> items = graphicsView->items(viewRect);
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298 | for (int i=0; i<items.size(); ++i) {
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299 | PageItem* pg = static_cast<PageItem*>(items.at(i));
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300 | QRect overlap = graphicsView->mapFromScene(pg->sceneBoundingRect()).boundingRect() & viewRect;
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301 | int area = overlap.width() * overlap.height();
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302 | if (area > maxArea) {
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303 | maxArea = area;
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304 | newPage = pg->pageNumber();
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305 | } else if (area == maxArea && pg->pageNumber() < newPage) {
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306 | newPage = pg->pageNumber();
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307 | }
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308 | }
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309 | return newPage;
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310 | }
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311 |
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312 | void QPrintPreviewWidgetPrivate::init()
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313 | {
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314 | Q_Q(QPrintPreviewWidget);
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315 |
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316 | graphicsView = new GraphicsView;
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317 | graphicsView->setInteractive(false);
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318 | graphicsView->setDragMode(QGraphicsView::ScrollHandDrag);
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319 | graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
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320 | QObject::connect(graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)),
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321 | q, SLOT(_q_updateCurrentPage()));
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322 | QObject::connect(graphicsView, SIGNAL(resized()), q, SLOT(_q_fit()));
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323 |
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324 | scene = new QGraphicsScene(graphicsView);
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325 | scene->setBackgroundBrush(Qt::gray);
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326 | graphicsView->setScene(scene);
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327 |
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328 | QVBoxLayout *layout = new QVBoxLayout;
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329 | q->setLayout(layout);
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330 | layout->setContentsMargins(0, 0, 0, 0);
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331 | layout->addWidget(graphicsView);
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332 | }
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333 |
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334 | void QPrintPreviewWidgetPrivate::populateScene()
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335 | {
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336 | // remove old pages
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337 | for (int i = 0; i < pages.size(); i++)
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338 | scene->removeItem(pages.at(i));
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339 | qDeleteAll(pages);
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340 | pages.clear();
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341 |
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342 | int numPages = pictures.count();
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343 | QSize paperSize = printer->paperRect().size();
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344 | QRect pageRect = printer->pageRect();
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345 |
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346 | for (int i = 0; i < numPages; i++) {
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347 | PageItem* item = new PageItem(i+1, pictures.at(i), paperSize, pageRect);
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348 | scene->addItem(item);
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349 | pages.append(item);
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350 | }
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351 | }
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352 |
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353 | void QPrintPreviewWidgetPrivate::layoutPages()
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354 | {
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355 | int numPages = pages.count();
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356 | if (numPages < 1)
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357 | return;
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358 |
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359 | int numPagePlaces = numPages;
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360 | int cols = 1; // singleMode and default
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361 | if (viewMode == QPrintPreviewWidget::AllPagesView) {
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362 | if (printer->orientation() == QPrinter::Portrait)
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363 | cols = qCeil(qSqrt((float) numPages));
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364 | else
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365 | cols = qFloor(qSqrt((float) numPages));
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366 | cols += cols % 2; // Nicer with an even number of cols
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367 | }
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368 | else if (viewMode == QPrintPreviewWidget::FacingPagesView) {
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369 | cols = 2;
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370 | numPagePlaces += 1;
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371 | }
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372 | int rows = qCeil(qreal(numPagePlaces) / cols);
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373 |
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374 | qreal itemWidth = pages.at(0)->boundingRect().width();
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375 | qreal itemHeight = pages.at(0)->boundingRect().height();
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376 | int pageNum = 1;
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377 | for (int i = 0; i < rows && pageNum <= numPages; i++) {
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378 | for (int j = 0; j < cols && pageNum <= numPages; j++) {
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379 | if (!i && !j && viewMode == QPrintPreviewWidget::FacingPagesView) {
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380 | // Front page doesn't have a facing page
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381 | continue;
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382 | } else {
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383 | pages.at(pageNum-1)->setPos(QPointF(j*itemWidth, i*itemHeight));
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384 | pageNum++;
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385 | }
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386 | }
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387 | }
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388 | scene->setSceneRect(scene->itemsBoundingRect());
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389 | }
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390 |
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391 | void QPrintPreviewWidgetPrivate::generatePreview()
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392 | {
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393 | //### If QPrinter::setPreviewMode() becomes public, handle the
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394 | //### case that we have been constructed with a printer that
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395 | //### _already_ has been preview-painted to, so we should
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396 | //### initially just show the pages it already contains, and not
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397 | //### emit paintRequested() until the user changes some parameter
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398 |
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399 | Q_Q(QPrintPreviewWidget);
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400 | printer->d_func()->setPreviewMode(true);
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401 | emit q->paintRequested(printer);
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402 | printer->d_func()->setPreviewMode(false);
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403 | pictures = printer->d_func()->previewPages();
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404 | populateScene(); // i.e. setPreviewPrintedPictures() e.l.
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405 | layoutPages();
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406 | curPage = qBound(1, curPage, pages.count());
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407 | if (fitting)
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408 | _q_fit();
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409 | emit q->previewChanged();
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410 | }
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411 |
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412 | void QPrintPreviewWidgetPrivate::setCurrentPage(int pageNumber)
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413 | {
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414 | if (pageNumber < 1 || pageNumber > pages.count())
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415 | return;
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416 |
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417 | int lastPage = curPage;
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418 | curPage = pageNumber;
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419 |
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420 | if (lastPage != curPage && lastPage > 0 && lastPage <= pages.count()) {
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421 | if (zoomMode != QPrintPreviewWidget::FitInView) {
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422 | QScrollBar *hsc = graphicsView->horizontalScrollBar();
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423 | QScrollBar *vsc = graphicsView->verticalScrollBar();
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424 | QPointF pt = graphicsView->transform().map(pages.at(curPage-1)->pos());
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425 | vsc->setValue(int(pt.y()) - 10);
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426 | hsc->setValue(int(pt.x()) - 10);
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427 | } else {
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428 | graphicsView->centerOn(pages.at(curPage-1));
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429 | }
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430 | }
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431 | }
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432 |
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433 | void QPrintPreviewWidgetPrivate::zoom(qreal zoom)
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434 | {
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435 | zoomFactor *= zoom;
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436 | graphicsView->scale(zoom, zoom);
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437 | }
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438 |
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439 | void QPrintPreviewWidgetPrivate::setZoomFactor(qreal _zoomFactor)
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440 | {
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441 | Q_Q(QPrintPreviewWidget);
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442 | zoomFactor = _zoomFactor;
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443 | graphicsView->resetTransform();
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444 | int dpi_y = q->logicalDpiY();
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445 | int printer_dpi_y = printer->logicalDpiY();
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446 | graphicsView->scale(zoomFactor*(dpi_y/float(printer_dpi_y)),
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447 | zoomFactor*(dpi_y/float(printer_dpi_y)));
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448 | }
|
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449 |
|
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450 | ///////////////////////////////////////
|
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451 |
|
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452 | /*!
|
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453 | \class QPrintPreviewWidget
|
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454 | \since 4.4
|
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455 |
|
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456 | \brief The QPrintPreviewWidget class provides a widget for
|
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457 | previewing page layouts for printer output.
|
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458 |
|
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459 | \ingroup printing
|
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460 |
|
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461 | QPrintPreviewDialog uses a QPrintPreviewWidget internally, and the
|
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462 | purpose of QPrintPreviewWidget is to make it possible to embed the
|
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463 | preview into other widgets. It also makes it possible to build a different
|
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464 | user interface around it than the default one provided with QPrintPreviewDialog.
|
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465 |
|
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466 | Using QPrintPreviewWidget is straightforward:
|
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467 |
|
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468 | \list 1
|
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469 | \o Create the QPrintPreviewWidget
|
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470 |
|
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471 | Construct the QPrintPreviewWidget either by passing in an
|
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472 | exisiting QPrinter object, or have QPrintPreviewWidget create a
|
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473 | default constructed QPrinter object for you.
|
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474 |
|
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475 | \o Connect the paintRequested() signal to a slot.
|
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476 |
|
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477 | When the widget needs to generate a set of preview pages, a
|
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478 | paintRequested() signal will be emitted from the widget. Connect a
|
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479 | slot to this signal, and draw onto the QPrinter passed in as a
|
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480 | signal parameter. Call QPrinter::newPage(), to start a new
|
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481 | page in the preview.
|
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482 |
|
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483 | \endlist
|
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484 |
|
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485 | \sa QPrinter, QPrintDialog, QPageSetupDialog, QPrintPreviewDialog
|
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486 | */
|
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487 |
|
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488 |
|
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489 | /*!
|
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490 | \enum QPrintPreviewWidget::ViewMode
|
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491 |
|
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492 | This enum is used to describe the view mode of the preview widget.
|
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493 |
|
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494 | \value SinglePageView A mode where single pages in the preview
|
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495 | is viewed.
|
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496 |
|
---|
497 | \value FacingPagesView A mode where the facing pages in the preview
|
---|
498 | is viewed.
|
---|
499 |
|
---|
500 | \value AllPagesView A view mode where all the pages in the preview
|
---|
501 | is viewed.
|
---|
502 | */
|
---|
503 |
|
---|
504 | /*!
|
---|
505 | \enum QPrintPreviewWidget::ZoomMode
|
---|
506 |
|
---|
507 | This enum is used to describe zoom mode of the preview widget.
|
---|
508 |
|
---|
509 | \value CustomZoom The zoom is set to a custom zoom value.
|
---|
510 |
|
---|
511 | \value FitToWidth This mode fits the current page to the width of the view.
|
---|
512 |
|
---|
513 | \value FitInView This mode fits the current page inside the view.
|
---|
514 |
|
---|
515 | */
|
---|
516 |
|
---|
517 | /*!
|
---|
518 | Constructs a QPrintPreviewWidget based on \a printer and with \a
|
---|
519 | parent as the parent widget. The widget flags \a flags are passed on
|
---|
520 | to the QWidget constructor.
|
---|
521 |
|
---|
522 | \sa QWidget::setWindowFlags()
|
---|
523 | */
|
---|
524 | QPrintPreviewWidget::QPrintPreviewWidget(QPrinter *printer, QWidget *parent, Qt::WindowFlags flags)
|
---|
525 | : QWidget(*new QPrintPreviewWidgetPrivate, parent, flags)
|
---|
526 | {
|
---|
527 | Q_D(QPrintPreviewWidget);
|
---|
528 | d->printer = printer;
|
---|
529 | d->ownPrinter = false;
|
---|
530 | d->init();
|
---|
531 | }
|
---|
532 |
|
---|
533 | /*!
|
---|
534 | \overload
|
---|
535 |
|
---|
536 | This will cause QPrintPreviewWidget to create an internal, default
|
---|
537 | constructed QPrinter object, which will be used to generate the
|
---|
538 | preview.
|
---|
539 | */
|
---|
540 | QPrintPreviewWidget::QPrintPreviewWidget(QWidget *parent, Qt::WindowFlags flags)
|
---|
541 | : QWidget(*new QPrintPreviewWidgetPrivate, parent, flags)
|
---|
542 | {
|
---|
543 | Q_D(QPrintPreviewWidget);
|
---|
544 | d->printer = new QPrinter;
|
---|
545 | d->ownPrinter = true;
|
---|
546 | d->init();
|
---|
547 | }
|
---|
548 |
|
---|
549 |
|
---|
550 | /*!
|
---|
551 | Destroys the QPrintPreviewWidget.
|
---|
552 | */
|
---|
553 | QPrintPreviewWidget::~QPrintPreviewWidget()
|
---|
554 | {
|
---|
555 | Q_D(QPrintPreviewWidget);
|
---|
556 | if (d->ownPrinter)
|
---|
557 | delete d->printer;
|
---|
558 | }
|
---|
559 |
|
---|
560 | /*!
|
---|
561 | Returns the current view mode. The default view mode is SinglePageView.
|
---|
562 | */
|
---|
563 | QPrintPreviewWidget::ViewMode QPrintPreviewWidget::viewMode() const
|
---|
564 | {
|
---|
565 | Q_D(const QPrintPreviewWidget);
|
---|
566 | return d->viewMode;
|
---|
567 | }
|
---|
568 |
|
---|
569 | /*!
|
---|
570 | Sets the view mode to \a mode. The default view mode is
|
---|
571 | SinglePageView.
|
---|
572 | */
|
---|
573 | void QPrintPreviewWidget::setViewMode(ViewMode mode)
|
---|
574 | {
|
---|
575 | Q_D(QPrintPreviewWidget);
|
---|
576 | d->viewMode = mode;
|
---|
577 | d->layoutPages();
|
---|
578 | if (d->viewMode == AllPagesView) {
|
---|
579 | d->graphicsView->fitInView(d->scene->itemsBoundingRect(), Qt::KeepAspectRatio);
|
---|
580 | d->fitting = false;
|
---|
581 | d->zoomMode = QPrintPreviewWidget::CustomZoom;
|
---|
582 | d->zoomFactor = d->graphicsView->transform().m11() * (float(d->printer->logicalDpiY()) / logicalDpiY());
|
---|
583 | emit previewChanged();
|
---|
584 | } else {
|
---|
585 | d->fitting = true;
|
---|
586 | d->_q_fit();
|
---|
587 | }
|
---|
588 | }
|
---|
589 |
|
---|
590 | /*!
|
---|
591 | Returns the current orientation of the preview. This value is
|
---|
592 | obtained from the QPrinter object associated with the preview.
|
---|
593 | */
|
---|
594 | QPrinter::Orientation QPrintPreviewWidget::orientation() const
|
---|
595 | {
|
---|
596 | Q_D(const QPrintPreviewWidget);
|
---|
597 | return d->printer->orientation();
|
---|
598 | }
|
---|
599 |
|
---|
600 | /*!
|
---|
601 | Sets the current orientation to \a orientation. This value will be
|
---|
602 | set on the QPrinter object associated with the preview.
|
---|
603 | */
|
---|
604 | void QPrintPreviewWidget::setOrientation(QPrinter::Orientation orientation)
|
---|
605 | {
|
---|
606 | Q_D(QPrintPreviewWidget);
|
---|
607 | d->printer->setOrientation(orientation);
|
---|
608 | d->generatePreview();
|
---|
609 | }
|
---|
610 |
|
---|
611 | /*!
|
---|
612 | Prints the preview to the printer associated with the preview.
|
---|
613 | */
|
---|
614 | void QPrintPreviewWidget::print()
|
---|
615 | {
|
---|
616 | Q_D(QPrintPreviewWidget);
|
---|
617 | // ### make use of the generated pages
|
---|
618 | emit paintRequested(d->printer);
|
---|
619 | }
|
---|
620 |
|
---|
621 | /*!
|
---|
622 | Zooms the current view in by \a factor. The default value for \a
|
---|
623 | factor is 1.1, which means the view will be scaled up by 10%.
|
---|
624 | */
|
---|
625 | void QPrintPreviewWidget::zoomIn(qreal factor)
|
---|
626 | {
|
---|
627 | Q_D(QPrintPreviewWidget);
|
---|
628 | d->fitting = false;
|
---|
629 | d->zoomMode = QPrintPreviewWidget::CustomZoom;
|
---|
630 | d->zoom(factor);
|
---|
631 | }
|
---|
632 |
|
---|
633 | /*!
|
---|
634 | Zooms the current view out by \a factor. The default value for \a
|
---|
635 | factor is 1.1, which means the view will be scaled down by 10%.
|
---|
636 | */
|
---|
637 | void QPrintPreviewWidget::zoomOut(qreal factor)
|
---|
638 | {
|
---|
639 | Q_D(QPrintPreviewWidget);
|
---|
640 | d->fitting = false;
|
---|
641 | d->zoomMode = QPrintPreviewWidget::CustomZoom;
|
---|
642 | d->zoom(1/factor);
|
---|
643 | }
|
---|
644 |
|
---|
645 | /*!
|
---|
646 | Returns the zoom factor of the view.
|
---|
647 | */
|
---|
648 | qreal QPrintPreviewWidget::zoomFactor() const
|
---|
649 | {
|
---|
650 | Q_D(const QPrintPreviewWidget);
|
---|
651 | return d->zoomFactor;
|
---|
652 | }
|
---|
653 |
|
---|
654 | /*!
|
---|
655 | Sets the zoom factor of the view to \a factor. For example, a
|
---|
656 | value of 1.0 indicates an unscaled view, which is approximately
|
---|
657 | the size the view will have on paper. A value of 0.5 will halve
|
---|
658 | the size of the view, while a value of 2.0 will double the size of
|
---|
659 | the view.
|
---|
660 | */
|
---|
661 | void QPrintPreviewWidget::setZoomFactor(qreal factor)
|
---|
662 | {
|
---|
663 | Q_D(QPrintPreviewWidget);
|
---|
664 | d->fitting = false;
|
---|
665 | d->zoomMode = QPrintPreviewWidget::CustomZoom;
|
---|
666 | d->setZoomFactor(factor);
|
---|
667 | }
|
---|
668 |
|
---|
669 | /*!
|
---|
670 | \obsolete
|
---|
671 | Returns the number of pages in the preview.
|
---|
672 | \sa pageCount()
|
---|
673 | */
|
---|
674 | int QPrintPreviewWidget::numPages() const
|
---|
675 | {
|
---|
676 | Q_D(const QPrintPreviewWidget);
|
---|
677 | return d->pages.size();
|
---|
678 | }
|
---|
679 |
|
---|
680 | /*!
|
---|
681 | \since 4.6
|
---|
682 | Returns the number of pages in the preview.
|
---|
683 | */
|
---|
684 | int QPrintPreviewWidget::pageCount() const
|
---|
685 | {
|
---|
686 | Q_D(const QPrintPreviewWidget);
|
---|
687 | return d->pages.size();
|
---|
688 | }
|
---|
689 |
|
---|
690 | /*!
|
---|
691 | Returns the currently viewed page in the preview.
|
---|
692 | */
|
---|
693 | int QPrintPreviewWidget::currentPage() const
|
---|
694 | {
|
---|
695 | Q_D(const QPrintPreviewWidget);
|
---|
696 | return d->curPage;
|
---|
697 | }
|
---|
698 |
|
---|
699 | /*!
|
---|
700 | Sets the current page in the preview. This will cause the view to
|
---|
701 | skip to the beginning of \a page.
|
---|
702 | */
|
---|
703 | void QPrintPreviewWidget::setCurrentPage(int page)
|
---|
704 | {
|
---|
705 | Q_D(QPrintPreviewWidget);
|
---|
706 | d->setCurrentPage(page);
|
---|
707 | }
|
---|
708 |
|
---|
709 | /*!
|
---|
710 | This is a convenience function and is the same as calling \c
|
---|
711 | {setZoomMode(QPrintPreviewWidget::FitToWidth)}.
|
---|
712 | */
|
---|
713 | void QPrintPreviewWidget::fitToWidth()
|
---|
714 | {
|
---|
715 | setZoomMode(FitToWidth);
|
---|
716 | }
|
---|
717 |
|
---|
718 | /*!
|
---|
719 | This is a convenience function and is the same as calling \c
|
---|
720 | {setZoomMode(QPrintPreviewWidget::FitInView)}.
|
---|
721 | */
|
---|
722 | void QPrintPreviewWidget::fitInView()
|
---|
723 | {
|
---|
724 | setZoomMode(FitInView);
|
---|
725 | }
|
---|
726 |
|
---|
727 | /*!
|
---|
728 | Sets the zoom mode to \a zoomMode. The default zoom mode is FitInView.
|
---|
729 |
|
---|
730 | \sa zoomMode(), viewMode(), setViewMode()
|
---|
731 | */
|
---|
732 | void QPrintPreviewWidget::setZoomMode(QPrintPreviewWidget::ZoomMode zoomMode)
|
---|
733 | {
|
---|
734 | Q_D(QPrintPreviewWidget);
|
---|
735 | d->zoomMode = zoomMode;
|
---|
736 | if (d->zoomMode == FitInView || d->zoomMode == FitToWidth) {
|
---|
737 | d->fitting = true;
|
---|
738 | d->_q_fit(true);
|
---|
739 | } else {
|
---|
740 | d->fitting = false;
|
---|
741 | }
|
---|
742 | }
|
---|
743 |
|
---|
744 | /*!
|
---|
745 | Returns the current zoom mode.
|
---|
746 |
|
---|
747 | \sa setZoomMode(), viewMode(), setViewMode()
|
---|
748 | */
|
---|
749 | QPrintPreviewWidget::ZoomMode QPrintPreviewWidget::zoomMode() const
|
---|
750 | {
|
---|
751 | Q_D(const QPrintPreviewWidget);
|
---|
752 | return d->zoomMode;
|
---|
753 | }
|
---|
754 |
|
---|
755 | /*!
|
---|
756 | This is a convenience function and is the same as calling \c
|
---|
757 | {setOrientation(QPrinter::Landscape)}.
|
---|
758 | */
|
---|
759 | void QPrintPreviewWidget::setLandscapeOrientation()
|
---|
760 | {
|
---|
761 | setOrientation(QPrinter::Landscape);
|
---|
762 | }
|
---|
763 |
|
---|
764 | /*!
|
---|
765 | This is a convenience function and is the same as calling \c
|
---|
766 | {setOrientation(QPrinter::Portrait)}.
|
---|
767 | */
|
---|
768 | void QPrintPreviewWidget::setPortraitOrientation()
|
---|
769 | {
|
---|
770 | setOrientation(QPrinter::Portrait);
|
---|
771 | }
|
---|
772 |
|
---|
773 | /*!
|
---|
774 | This is a convenience function and is the same as calling \c
|
---|
775 | {setViewMode(QPrintPreviewWidget::SinglePageView)}.
|
---|
776 | */
|
---|
777 | void QPrintPreviewWidget::setSinglePageViewMode()
|
---|
778 | {
|
---|
779 | setViewMode(SinglePageView);
|
---|
780 | }
|
---|
781 |
|
---|
782 | /*!
|
---|
783 | This is a convenience function and is the same as calling \c
|
---|
784 | {setViewMode(QPrintPreviewWidget::FacingPagesView)}.
|
---|
785 | */
|
---|
786 | void QPrintPreviewWidget::setFacingPagesViewMode()
|
---|
787 | {
|
---|
788 | setViewMode(FacingPagesView);
|
---|
789 | }
|
---|
790 |
|
---|
791 | /*!
|
---|
792 | This is a convenience function and is the same as calling \c
|
---|
793 | {setViewMode(QPrintPreviewWidget::AllPagesView)}.
|
---|
794 | */
|
---|
795 | void QPrintPreviewWidget::setAllPagesViewMode()
|
---|
796 | {
|
---|
797 | setViewMode(AllPagesView);
|
---|
798 | }
|
---|
799 |
|
---|
800 |
|
---|
801 | /*!
|
---|
802 | This function updates the preview, which causes the
|
---|
803 | paintRequested() signal to be emitted.
|
---|
804 | */
|
---|
805 | void QPrintPreviewWidget::updatePreview()
|
---|
806 | {
|
---|
807 | Q_D(QPrintPreviewWidget);
|
---|
808 | d->initialized = true;
|
---|
809 | d->generatePreview();
|
---|
810 | d->graphicsView->updateGeometry();
|
---|
811 | }
|
---|
812 |
|
---|
813 | /*! \reimp
|
---|
814 | */
|
---|
815 | void QPrintPreviewWidget::setVisible(bool visible)
|
---|
816 | {
|
---|
817 | Q_D(QPrintPreviewWidget);
|
---|
818 | if (visible && !d->initialized)
|
---|
819 | updatePreview();
|
---|
820 | QWidget::setVisible(visible);
|
---|
821 | }
|
---|
822 |
|
---|
823 | /*!
|
---|
824 | \fn void QPrintPreviewWidget::paintRequested(QPrinter *printer)
|
---|
825 |
|
---|
826 | This signal is emitted when the preview widget needs to generate a
|
---|
827 | set of preview pages. \a printer is the printer associated with
|
---|
828 | this preview widget.
|
---|
829 | */
|
---|
830 |
|
---|
831 | /*!
|
---|
832 | \fn void QPrintPreviewWidget::previewChanged()
|
---|
833 |
|
---|
834 | This signal is emitted whenever the preview widget has changed
|
---|
835 | some internal state, such as the orientation.
|
---|
836 | */
|
---|
837 |
|
---|
838 |
|
---|
839 | QT_END_NAMESPACE
|
---|
840 |
|
---|
841 | #include "moc_qprintpreviewwidget.cpp"
|
---|
842 | #include "qprintpreviewwidget.moc"
|
---|
843 |
|
---|
844 | #endif // QT_NO_PRINTPREVIEWWIDGET
|
---|