C++/Qt/QPrinter

Материал из C\C++ эксперт
Перейти к: навигация, поиск

Get Page rectangle

  
Foundations of Qt Development\Chapter07\printing\painter\main.cpp
/*
 * Copyright (c) 2006-2007, Johan Thelin
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice, 
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice,  
 *       this list of conditions and the following disclaimer in the documentation 
 *       and/or other materials provided with the distribution.
 *     * Neither the name of APress nor the names of its contributors 
 *       may be used to endorse or promote products derived from this software 
 *       without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#include <QApplication>
#include <QPrinter>
#include <QPrintDialog>
#include <QPainter>
int main( int argc, char **argv )
{
  QApplication app( argc, argv );
  
  QPrinter printer;
  QPrintDialog dlg( &printer );
  if( dlg.exec() == QDialog::Accepted )
  {
    QPainter painter( &printer );
    
    painter.setPen( Qt::black );
    
    for( int page=0; page<5; page++ )
    {
      painter.drawRect( printer.pageRect() );
      painter.drawLine( printer.pageRect().topLeft(), printer.pageRect().bottomRight() );
      painter.drawLine( printer.pageRect().topRight(), printer.pageRect().bottomLeft() );
      
      QRectF textArea(
          printer.pageRect().left()  +printer.resolution() * 0.5, 
          printer.pageRect().top()   +printer.resolution() * 0.5, 
          printer.pageRect().width() -printer.resolution() * 1.0, 
          printer.pageRect().height()-printer.resolution() * 1.5 );
      
      painter.drawRect( textArea );
     
      painter.drawText( textArea, Qt::AlignTop | Qt::AlignLeft, QString( "Page %1" ).arg( page+1 ) );
        
      if( page != 4 )
        printer.newPage();
    }
  }
  
  return 0;
}


Get printer resolution

  
Foundations of Qt Development\Chapter07\printing\painter\main.cpp
/*
 * Copyright (c) 2006-2007, Johan Thelin
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice, 
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice,  
 *       this list of conditions and the following disclaimer in the documentation 
 *       and/or other materials provided with the distribution.
 *     * Neither the name of APress nor the names of its contributors 
 *       may be used to endorse or promote products derived from this software 
 *       without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#include <QApplication>
#include <QPrinter>
#include <QPrintDialog>
#include <QPainter>
int main( int argc, char **argv )
{
  QApplication app( argc, argv );
  
  QPrinter printer;
  QPrintDialog dlg( &printer );
  if( dlg.exec() == QDialog::Accepted )
  {
    QPainter painter( &printer );
    
    painter.setPen( Qt::black );
    
    for( int page=0; page<5; page++ )
    {
      painter.drawRect( printer.pageRect() );
      painter.drawLine( printer.pageRect().topLeft(), printer.pageRect().bottomRight() );
      painter.drawLine( printer.pageRect().topRight(), printer.pageRect().bottomLeft() );
      
      QRectF textArea(
          printer.pageRect().left()  +printer.resolution() * 0.5, 
          printer.pageRect().top()   +printer.resolution() * 0.5, 
          printer.pageRect().width() -printer.resolution() * 1.0, 
          printer.pageRect().height()-printer.resolution() * 1.5 );
      
      painter.drawRect( textArea );
     
      painter.drawText( textArea, Qt::AlignTop | Qt::AlignLeft, QString( "Page %1" ).arg( page+1 ) );
        
      if( page != 4 )
        printer.newPage();
    }
  }
  
  return 0;
}


Print out Painted page

  
Foundations of Qt Development\Chapter07\printing\painter\main.cpp
/*
 * Copyright (c) 2006-2007, Johan Thelin
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice, 
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice,  
 *       this list of conditions and the following disclaimer in the documentation 
 *       and/or other materials provided with the distribution.
 *     * Neither the name of APress nor the names of its contributors 
 *       may be used to endorse or promote products derived from this software 
 *       without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#include <QApplication>
#include <QPrinter>
#include <QPrintDialog>
#include <QPainter>
int main( int argc, char **argv )
{
  QApplication app( argc, argv );
  
  QPrinter printer;
  QPrintDialog dlg( &printer );
  if( dlg.exec() == QDialog::Accepted )
  {
    QPainter painter( &printer );
    
    painter.setPen( Qt::black );
    
    for( int page=0; page<5; page++ )
    {
      painter.drawRect( printer.pageRect() );
      painter.drawLine( printer.pageRect().topLeft(), printer.pageRect().bottomRight() );
      painter.drawLine( printer.pageRect().topRight(), printer.pageRect().bottomLeft() );
      
      QRectF textArea(
          printer.pageRect().left()  +printer.resolution() * 0.5, 
          printer.pageRect().top()   +printer.resolution() * 0.5, 
          printer.pageRect().width() -printer.resolution() * 1.0, 
          printer.pageRect().height()-printer.resolution() * 1.5 );
      
      painter.drawRect( textArea );
     
      painter.drawText( textArea, Qt::AlignTop | Qt::AlignLeft, QString( "Page %1" ).arg( page+1 ) );
        
      if( page != 4 )
        printer.newPage();
    }
  }
  
  return 0;
}


Print out text document

  
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QHash>
#include <QMainWindow>
#include <QTextDocumentFragment>
class QAction;
class QTextDocument;
class QTextEdit;
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow();
public slots:
    void openFile();
    void printFile();
    void printPdf();
private:
    QAction *printAction;
    QAction *pdfPrintAction;
    QString currentFile;
    QTextEdit *editor;
    QTextDocument *document;
};
#endif


#include <QtGui>
#include "mainwindow.h"
MainWindow::MainWindow()
{
    QMenu *fileMenu = new QMenu(tr("&File"));
    fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
                        QKeySequence(tr("Ctrl+O", "File|Open")));
    printAction = fileMenu->addAction(tr("&Print..."), this, SLOT(printFile()));
    printAction->setEnabled(false);
    pdfPrintAction = fileMenu->addAction(tr("Print as P&DF..."), this, SLOT(printPdf()));
    pdfPrintAction->setEnabled(false);
    fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
                        QKeySequence(tr("Ctrl+Q", "File|Exit")));
    menuBar()->addMenu(fileMenu);
    editor = new QTextEdit(this);
    document = new QTextDocument(this);
    editor->setDocument(document);
    connect(editor, SIGNAL(selectionChanged()), this, SLOT(updateMenus()));
    setCentralWidget(editor);
    setWindowTitle(tr("Text Document Writer"));
}
void MainWindow::openFile()
{
    QString fileName = QFileDialog::getOpenFileName(this,
        tr("Open file"), currentFile, "HTML files (*.html);;Text files (*.txt)");
    
    if (!fileName.isEmpty()) {
        QFileInfo info(fileName);
        if (info.completeSuffix() == "html") {
            QFile file(fileName);
            
            if (file.open(QIODevice::ReadOnly)) {
                editor->setHtml(file.readAll());
                file.close();
                currentFile = fileName;
            }
        } else if (info.completeSuffix() == "txt") {
            QFile file(fileName);
            
            if (file.open(QIODevice::ReadOnly)) {
                editor->setPlainText(file.readAll());
                file.close();
                currentFile = fileName;
            }
        }
        printAction->setEnabled(true);
        pdfPrintAction->setEnabled(true);
    }
}
void MainWindow::printFile()
{
    QTextDocument *document = editor->document();
    QPrinter printer;
    QPrintDialog *dlg = new QPrintDialog(&printer, this);
    if (dlg->exec() != QDialog::Accepted)
        return;
    document->print(&printer);
}
void MainWindow::printPdf()
{
    QPrinter printer(QPrinter::HighResolution);
    printer.setOutputFormat(QPrinter::PdfFormat);
    QPrintDialog *printDialog = new QPrintDialog(&printer, this);
    if (printDialog->exec() == QDialog::Accepted)
        editor->document()->print(&printer);
}



#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow *window = new MainWindow;
    window->resize(640, 480);
    window->show();
    return app.exec();
}


Qprinter printing

  
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    QPrinter printer;
    printer.setOutputFormat(QPrinter::PdfFormat);
    printer.setOutputFileName("/foobar/nonwritable.pdf");
    QPainter painter;
    if (! painter.begin(&printer)) { // failed to open file
        qWarning("failed to open file, is it writable?");
        return 1;
    }
    painter.drawText(10, 10, "Test");
    if (! printer.newPage()) {
        qWarning("failed in flushing page to disk, disk full?");
        return 1;
    }
    painter.drawText(10, 10, "Test 2");
    painter.end();
    return 0;
}


#include <QObject>
class Object : public QObject
{
    Q_OBJECT
public:
    Object(QObject *parent = 0);
public slots:
    void print();
};



#include <QtGui>
#include "object.h"
Object::Object(QObject *parent)
    : QObject(parent)
{
}
void Object::print()
{
    int numberOfPages = 10;
    int lastPage = numberOfPages - 1;

    QPrinter printer(QPrinter::HighResolution);
    printer.setOutputFileName("print.ps");
    QPainter painter;
    painter.begin(&printer);
    for (int page = 0; page < numberOfPages; ++page) {
        // Use the painter to draw on the page.
        if (page != lastPage)
            printer.newPage();
    }
    painter.end();
    qApp->quit();
}



#include <QtGui>
#include "object.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Object object;
    QTimer timer;
    timer.setSingleShot(true);
    timer.connect(&timer, SIGNAL(timeout()), &object, SLOT(print()));
    timer.start(0);
    return app.exec();
}