Pratical example of QPrintPreviewDialog

[vcp]

Hi all,

I'm needing of the pratical example of how use the class QPrintPreviewDialog. I did not find no documentation about this. I need a pratical example.

I think that the Throlltec's must update the samples programs.

[jacek]

Come on! All this class has is a constructor and a signal.

The docs describe three steps you need to follow. Which one you don't understand?

[patrik08]

Hi all,

I'm needing of the pratical example of how use the class QPrintPreviewDialog. I did not find no documentation about this. I need a pratical example.
I think that the Throlltec's must update the samples programs.

this piece of code is from
http://fop-miniscribus.googlecode.co...o/textedit.cpp

its only a qt4.4.1/demos/textedit + OpenOffice odt reader

to get full svn code open:
http://www.qt-apps.org/content/show....?content=80650

void TextEdit::filePrintPreview()
{
#ifndef QT_NO_PRINTER
    QPrinter printer(QPrinter::HighResolution);
    QPrintPreviewDialog preview(&printer, this);
    preview.setWindowFlags ( Qt::Window );
    connect(&preview, SIGNAL(paintRequested(QPrinter *)), SLOT(printPreview(QPrinter *)));
    preview.exec();
#endif
}
 
void TextEdit::printPreview(QPrinter *printer)
{
#ifndef QT_NO_PRINTER
    textEdit->print(printer);
#endif
}

void TextEdit::filePrintPreview()
{
#ifndef QT_NO_PRINTER
    QPrinter printer(QPrinter::HighResolution);
    QPrintPreviewDialog preview(&printer, this);
    preview.setWindowFlags ( Qt::Window );
    connect(&preview, SIGNAL(paintRequested(QPrinter *)), SLOT(printPreview(QPrinter *)));
    preview.exec();
#endif
}

void TextEdit::printPreview(QPrinter *printer)
{
#ifndef QT_NO_PRINTER
    textEdit->print(printer);
#endif
}

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IMO: if you like to build static QPrintPreviewDialog append his icon

[vcp]

Thanks to patrik08 by your help.

I think that the objective of this forum be help the persons and not depreciate the questions, by more samples that they be.

[rosenth]

hi.
why the printer in this function:

void dlg_account::on_btn_print_clicked()
{    
      QPrinter printer(QPrinter::HighResolution);
      printer.setFullPage( true );
           QPrintPreviewDialog preview(&printer, this);
           preview.setWindowFlags ( Qt::Window );
           connect(&preview, SIGNAL(paintRequested(QPrinter* )), SLOT(print(QPrinter* )));
           preview.exec();
}

void dlg_account::on_btn_print_clicked()
{    
      QPrinter printer(QPrinter::HighResolution);
      printer.setFullPage( true );
           QPrintPreviewDialog preview(&printer, this);
           preview.setWindowFlags ( Qt::Window );
           connect(&preview, SIGNAL(paintRequested(QPrinter* )), SLOT(print(QPrinter* )));
           preview.exec();
}

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isnt recognised in the:

void dlg_account::print( QPrinter* printer)
{
    QPainter *painter=new QPainter(printer);
    QRect paper = printer->pageRect();
    painter->setPen(Qt::black);
    painter->setFont(QFont("Sans",14,0,0));
    painter->drawText(QRect(0,0,100,100),Qt::AlignLeft||Qt::AlignTop,"page1");
}

void dlg_account::print( QPrinter* printer)
{
    QPainter *painter=new QPainter(printer);
    QRect paper = printer->pageRect();
    painter->setPen(Qt::black);
    painter->setFont(QFont("Sans",14,0,0));
    painter->drawText(QRect(0,0,100,100),Qt::AlignLeft||Qt::AlignTop,"page1");
}

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[pcheng]

I am having difficulties with implementing the QPrintPreviewDialog.

I included this code in the function that calls the printing:

QPrinter printer(QPrinter::HighResolution);
        QPrintPreviewDialog ppd(&printer,this,Qt::Window);
        connect(&ppd, SIGNAL(paintRequested(QPrinter *)), SLOT(printPreview(QPrinter *)));
        ppd.exec();

QPrinter printer(QPrinter::HighResolution);
        QPrintPreviewDialog ppd(&printer,this,Qt::Window);
        connect(&ppd, SIGNAL(paintRequested(QPrinter *)), SLOT(printPreview(QPrinter *)));
        ppd.exec();

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And I also added this function at the end:

void PackageDialog::printPreview( QPrinter* printer)
{
    ui->editor->print(printer);
}

void PackageDialog::printPreview( QPrinter* printer)
{
    ui->editor->print(printer);
}

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It says that the ui->editor part should be the parent of the dialog box but I am not sure if I understand what it needs there.

In the textedit example it uses textEdit = new QTextEdit(this); to initialize a value which is later used in the PrintPreview. But in my case what do I initialize?

Any help is appreciated.

Thanks,

Pericles

---

Added after 30 minutes:

I added the following code in the printPreview function instead of ui->editor->print(printer)

// create painter for drawing print page
    QPainter painter( printer );
    // you can do formatting here...
    QFont font;
    font.setPointSize(18);
    painter.setFont(font);
 
    for (int i = 0; i < 3; i++) {
 
        painter.drawText(10, 10, QString("page number: %1").arg(i));
        // move to next page
        if (i != 2) printer->newPage();
    }

// create painter for drawing print page
    QPainter painter( printer );
    // you can do formatting here...
    QFont font;
    font.setPointSize(18);
    painter.setFont(font);

    for (int i = 0; i < 3; i++) {

        painter.drawText(10, 10, QString("page number: %1").arg(i));
        // move to next page
        if (i != 2) printer->newPage();
    }

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It opens the print preview dialog box but nothing is showing up in it.

Do I need to specify anywhere what to show?

Pericles

---

Added after 46 minutes:

Just found out that I needed to do widget->render();

Works now.

Thanks,

Pericles