[2] | 1 | /****************************************************************************
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| 2 | **
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[846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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[2] | 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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[561] | 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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[2] | 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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[561] | 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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[2] | 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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[561] | 43 | #include "private/qwidget_p.h"
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[2] | 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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[561] | 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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[2] | 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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[769] | 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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[2] | 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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[561] | 178 | class QPrintPreviewWidgetPrivate : public QWidgetPrivate
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[2] | 179 | {
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| 180 | Q_DECLARE_PUBLIC(QPrintPreviewWidget)
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| 181 | public:
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[561] | 182 | QPrintPreviewWidgetPrivate()
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| 183 | : scene(0), curPage(1),
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[2] | 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();
|
---|
| 424 | QPointF pt = graphicsView->transform().map(pages.at(curPage-1)->pos());
|
---|
| 425 | vsc->setValue(int(pt.y()) - 10);
|
---|
| 426 | hsc->setValue(int(pt.x()) - 10);
|
---|
| 427 | } else {
|
---|
| 428 | graphicsView->centerOn(pages.at(curPage-1));
|
---|
| 429 | }
|
---|
| 430 | }
|
---|
| 431 | }
|
---|
| 432 |
|
---|
| 433 | void QPrintPreviewWidgetPrivate::zoom(qreal zoom)
|
---|
| 434 | {
|
---|
| 435 | zoomFactor *= zoom;
|
---|
| 436 | graphicsView->scale(zoom, zoom);
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | void QPrintPreviewWidgetPrivate::setZoomFactor(qreal _zoomFactor)
|
---|
| 440 | {
|
---|
| 441 | Q_Q(QPrintPreviewWidget);
|
---|
| 442 | zoomFactor = _zoomFactor;
|
---|
| 443 | graphicsView->resetTransform();
|
---|
| 444 | int dpi_y = q->logicalDpiY();
|
---|
| 445 | int printer_dpi_y = printer->logicalDpiY();
|
---|
| 446 | graphicsView->scale(zoomFactor*(dpi_y/float(printer_dpi_y)),
|
---|
| 447 | zoomFactor*(dpi_y/float(printer_dpi_y)));
|
---|
| 448 | }
|
---|
| 449 |
|
---|
| 450 | ///////////////////////////////////////
|
---|
| 451 |
|
---|
| 452 | /*!
|
---|
| 453 | \class QPrintPreviewWidget
|
---|
| 454 | \since 4.4
|
---|
| 455 |
|
---|
| 456 | \brief The QPrintPreviewWidget class provides a widget for
|
---|
| 457 | previewing page layouts for printer output.
|
---|
| 458 |
|
---|
[561] | 459 | \ingroup printing
|
---|
[2] | 460 |
|
---|
| 461 | QPrintPreviewDialog uses a QPrintPreviewWidget internally, and the
|
---|
| 462 | purpose of QPrintPreviewWidget is to make it possible to embed the
|
---|
| 463 | preview into other widgets. It also makes it possible to build a different
|
---|
| 464 | user interface around it than the default one provided with QPrintPreviewDialog.
|
---|
| 465 |
|
---|
| 466 | Using QPrintPreviewWidget is straightforward:
|
---|
| 467 |
|
---|
| 468 | \list 1
|
---|
| 469 | \o Create the QPrintPreviewWidget
|
---|
| 470 |
|
---|
| 471 | Construct the QPrintPreviewWidget either by passing in an
|
---|
[846] | 472 | existing QPrinter object, or have QPrintPreviewWidget create a
|
---|
[2] | 473 | default constructed QPrinter object for you.
|
---|
| 474 |
|
---|
| 475 | \o Connect the paintRequested() signal to a slot.
|
---|
| 476 |
|
---|
| 477 | When the widget needs to generate a set of preview pages, a
|
---|
| 478 | paintRequested() signal will be emitted from the widget. Connect a
|
---|
| 479 | slot to this signal, and draw onto the QPrinter passed in as a
|
---|
| 480 | signal parameter. Call QPrinter::newPage(), to start a new
|
---|
| 481 | page in the preview.
|
---|
| 482 |
|
---|
| 483 | \endlist
|
---|
| 484 |
|
---|
| 485 | \sa QPrinter, QPrintDialog, QPageSetupDialog, QPrintPreviewDialog
|
---|
| 486 | */
|
---|
| 487 |
|
---|
| 488 |
|
---|
| 489 | /*!
|
---|
| 490 | \enum QPrintPreviewWidget::ViewMode
|
---|
| 491 |
|
---|
| 492 | This enum is used to describe the view mode of the preview widget.
|
---|
| 493 |
|
---|
| 494 | \value SinglePageView A mode where single pages in the preview
|
---|
| 495 | is viewed.
|
---|
| 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)
|
---|
[561] | 525 | : QWidget(*new QPrintPreviewWidgetPrivate, parent, flags)
|
---|
[2] | 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)
|
---|
[561] | 541 | : QWidget(*new QPrintPreviewWidgetPrivate, parent, flags)
|
---|
[2] | 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 | /*!
|
---|
[561] | 670 | \obsolete
|
---|
[2] | 671 | Returns the number of pages in the preview.
|
---|
[561] | 672 | \sa pageCount()
|
---|
[2] | 673 | */
|
---|
| 674 | int QPrintPreviewWidget::numPages() const
|
---|
| 675 | {
|
---|
| 676 | Q_D(const QPrintPreviewWidget);
|
---|
| 677 | return d->pages.size();
|
---|
| 678 | }
|
---|
| 679 |
|
---|
| 680 | /*!
|
---|
[561] | 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 | /*!
|
---|
[2] | 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
|
---|