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https://github.com/RetroShare/RetroShare.git
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8079660291
Added Print Feature to MessagesDialog Added Print Preview Feature git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@422 b45a01b8-16f6-495d-af2f-9b41ad6348cc
335 lines
10 KiB
C++
335 lines
10 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2004-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** This file may be used under the terms of the GNU General Public
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** License version 2.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of
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** this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/
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**
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** In addition, as a special exception, Trolltech gives you certain
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** additional rights. These rights are described in the Trolltech GPL
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** Exception version 1.0, which can be found at
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** http://www.trolltech.com/products/qt/gplexception/ and in the file
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** GPL_EXCEPTION.txt in this package.
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**
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** In addition, as a special exception, Trolltech, as the sole copyright
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** holder for Qt Designer, grants users of the Qt/Eclipse Integration
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** plug-in the right for the Qt/Eclipse Integration to link to
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** functionality provided by Qt Designer and its related libraries.
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**
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** Trolltech reserves all rights not expressly granted herein.
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**
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** Trolltech ASA (c) 2007
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**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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****************************************************************************/
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#include "printpreview.h"
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#include <QAbstractScrollArea>
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#include <QPrintDialog>
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#include <QPrinter>
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#include <QToolBar>
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#include <QAction>
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#include <QTextFormat>
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#include <QMouseEvent>
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#include <QTextFrame>
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#include <QTextDocument>
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#include <QAbstractTextDocumentLayout>
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#include <QScrollBar>
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#include <QPainter>
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#include <QDebug>
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#include <QPageSetupDialog>
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#include <QStatusBar>
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#ifdef Q_WS_MAC
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const QString rsrcPath = ":/images/mac";
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#else
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const QString rsrcPath = ":/images/win";
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#endif
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static inline int inchesToPixels(float inches, QPaintDevice *device)
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{
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return qRound(inches * device->logicalDpiY());
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}
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static inline qreal mmToInches(double mm)
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{
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return mm*0.039370147;
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}
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class PreviewView : public QAbstractScrollArea
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{
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Q_OBJECT
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public:
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PreviewView(QTextDocument *document, PrintPreview *printPrev);
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inline void updateLayout() { resizeEvent(0); viewport()->update(); }
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public slots:
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void zoomIn();
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void zoomOut();
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protected:
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virtual void paintEvent(QPaintEvent *e);
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virtual void resizeEvent(QResizeEvent *);
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virtual void mousePressEvent(QMouseEvent *e);
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virtual void mouseMoveEvent(QMouseEvent *e);
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virtual void mouseReleaseEvent(QMouseEvent *e);
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private:
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void paintPage(QPainter *painter, int page);
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QTextDocument *doc;
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qreal scale;
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int interPageSpacing;
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QPoint mousePressPos;
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QPoint scrollBarValuesOnMousePress;
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PrintPreview *printPreview;
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};
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PreviewView::PreviewView(QTextDocument *document, PrintPreview *printPrev)
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: printPreview(printPrev)
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{
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verticalScrollBar()->setSingleStep(20);
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horizontalScrollBar()->setSingleStep(20);
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viewport()->setBackgroundRole(QPalette::Dark);
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doc = document;
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scale = 1.0;
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interPageSpacing = 30;
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}
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void PreviewView::zoomIn()
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{
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scale += 0.2;
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resizeEvent(0);
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viewport()->update();
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}
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void PreviewView::zoomOut()
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{
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scale -= 0.2;
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resizeEvent(0);
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viewport()->update();
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}
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void PreviewView::paintEvent(QPaintEvent *)
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{
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QPainter p(viewport());
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p.translate(-horizontalScrollBar()->value(), -verticalScrollBar()->value());
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p.translate(interPageSpacing, interPageSpacing);
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const int pages = doc->pageCount();
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for (int i = 0; i < pages; ++i) {
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p.save();
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p.scale(scale, scale);
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paintPage(&p, i);
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p.restore();
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p.translate(0, interPageSpacing + printPreview->paperSize.height() * scale);
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}
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}
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void PreviewView::paintPage(QPainter *painter, int page)
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{
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const QSizeF pgSize = doc->pageSize();
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QColor col(Qt::black);
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painter->setPen(col);
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painter->setBrush(Qt::white);
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painter->drawRect(QRectF(QPointF(0, 0), printPreview->paperSize));
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painter->setBrush(Qt::NoBrush);
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col = col.light();
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painter->drawLine(QLineF(printPreview->paperSize.width(), 1,
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printPreview->paperSize.width(), printPreview->paperSize.height() - 1));
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col = col.light();
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painter->drawLine(QLineF(printPreview->paperSize.width(), 2,
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printPreview->paperSize.width(), printPreview->paperSize.height() - 2));
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QRectF docRect(QPointF(0, page * pgSize.height()), pgSize);
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QAbstractTextDocumentLayout::PaintContext ctx;
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ctx.clip = docRect;
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// don't use the system palette text as default text color, on HP/UX
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// for example that's white, and white text on white paper doesn't
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// look that nice
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ctx.palette.setColor(QPalette::Text, Qt::black);
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painter->translate(0, - page * pgSize.height());
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painter->translate(printPreview->pageTopLeft);
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painter->setClipRect(docRect);//.translated(printPreview->pageTopLeft));
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doc->documentLayout()->draw(painter, ctx);
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}
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void PreviewView::resizeEvent(QResizeEvent *)
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{
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const QSize viewportSize = viewport()->size();
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QSize docSize;
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docSize.setWidth(qRound(printPreview->paperSize.width() * scale + 2 * interPageSpacing));
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const int pageCount = doc->pageCount();
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docSize.setHeight(qRound(pageCount * printPreview->paperSize.height() * scale + (pageCount + 1) * interPageSpacing));
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horizontalScrollBar()->setRange(0, docSize.width() - viewportSize.width());
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horizontalScrollBar()->setPageStep(viewportSize.width());
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verticalScrollBar()->setRange(0, docSize.height() - viewportSize.height());
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verticalScrollBar()->setPageStep(viewportSize.height());
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}
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void PreviewView::mousePressEvent(QMouseEvent *e)
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{
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mousePressPos = e->pos();
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scrollBarValuesOnMousePress.rx() = horizontalScrollBar()->value();
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scrollBarValuesOnMousePress.ry() = verticalScrollBar()->value();
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e->accept();
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}
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void PreviewView::mouseMoveEvent(QMouseEvent *e)
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{
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if (mousePressPos.isNull()) {
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e->ignore();
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return;
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}
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horizontalScrollBar()->setValue(scrollBarValuesOnMousePress.x() - e->pos().x() + mousePressPos.x());
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verticalScrollBar()->setValue(scrollBarValuesOnMousePress.y() - e->pos().y() + mousePressPos.y());
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horizontalScrollBar()->update();
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verticalScrollBar()->update();
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e->accept();
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}
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void PreviewView::mouseReleaseEvent(QMouseEvent *e)
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{
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mousePressPos = QPoint();
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e->accept();
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}
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PrintPreview::PrintPreview(const QTextDocument *document, QWidget *parent)
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: QMainWindow(parent), printer(QPrinter::HighResolution)
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{
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setWindowTitle(tr("RetroShare Message - Print Preview"));
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printer.setFullPage(true);
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doc = document->clone();
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view = new PreviewView(doc, this);
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setCentralWidget(view);
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resize(800, 600);
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doc->setUseDesignMetrics(true);
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doc->documentLayout()->setPaintDevice(view->viewport());
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// add a nice 2 cm margin
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const qreal margin = inchesToPixels(mmToInches(20), this);
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QTextFrameFormat fmt = doc->rootFrame()->frameFormat();
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fmt.setMargin(margin);
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doc->rootFrame()->setFrameFormat(fmt);
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setup();
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QFont f(doc->defaultFont());
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f.setPointSize(10);
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doc->setDefaultFont(f);
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QToolBar *tb = addToolBar(tr("Print"));
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tb->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
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QAction *a;
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a = new QAction(QIcon(":/images/textedit/fileprint.png"), tr("&Print..."), this);
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a->setShortcut(Qt::CTRL + Qt::Key_P);
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connect(a, SIGNAL(triggered()), this, SLOT(print()));
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tb->addAction(a);
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a = new QAction(this);
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a->setText(tr("Page Setup..."));
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connect(a, SIGNAL(triggered()), this, SLOT(pageSetup()));
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tb->addAction(a);
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tb->addSeparator();
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a = new QAction(QIcon(":/images/textedit/zoomin.png"), tr("Zoom In"), this);
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connect(a, SIGNAL(triggered()), view, SLOT(zoomIn()));
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tb->addAction(a);
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a = new QAction(QIcon(":/images/textedit/zoomout.png"), tr("Zoom Out"), this);
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connect(a, SIGNAL(triggered()), view, SLOT(zoomOut()));
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tb->addAction(a);
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tb->addSeparator();
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a = new QAction(this);
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a->setText(tr("&Close"));
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connect(a, SIGNAL(triggered()), this, SLOT(close()));
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tb->addAction(a);
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statusBar()->setSizeGripEnabled(true);
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}
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void PrintPreview::setup()
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{
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QSizeF page = printer.pageRect().size();
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paperSize = printer.paperRect().size();
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paperSize.rwidth() *= qreal(view->logicalDpiX()) / printer.logicalDpiX();
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paperSize.rheight() *= qreal(view->logicalDpiY()) / printer.logicalDpiY();
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pageTopLeft = printer.pageRect().topLeft();
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pageTopLeft.rx() *= qreal(view->logicalDpiX()) / printer.logicalDpiX();
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pageTopLeft.ry() *= qreal(view->logicalDpiY()) / printer.logicalDpiY();
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page.setWidth(page.width() * view->logicalDpiX() / printer.logicalDpiX());
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page.setHeight(page.height() * view->logicalDpiY() / printer.logicalDpiY());
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// add a nice 2 cm margin
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const qreal margin = inchesToPixels(mmToInches(20), this);
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QTextFrameFormat fmt = doc->rootFrame()->frameFormat();
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fmt.setMargin(margin);
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doc->rootFrame()->setFrameFormat(fmt);
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doc->setPageSize(page);
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}
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PrintPreview::~PrintPreview()
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{
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delete doc;
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}
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void PrintPreview::print()
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{
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QPrintDialog *dlg = new QPrintDialog(&printer, this);
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if (dlg->exec() == QDialog::Accepted) {
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doc->print(&printer);
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}
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delete dlg;
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}
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void PrintPreview::pageSetup()
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{
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QPageSetupDialog dlg(&printer, this);
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if (dlg.exec() == QDialog::Accepted) {
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setup();
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view->updateLayout();
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}
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}
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#include "printpreview.moc"
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