experiencing problem at printing out QTableWidget

[rmagro]

Hi Qt Community,

I'm using the following code to print out a QTableWidget,
but I only get the the contents inside the table and not the horizontalHeader..


QPrinter printer(QPrinter::HighResolution);
printer.setOrientation(QPrinter::Landscape);

QPrintDialog dlg(&printer, this);

if (dlg.exec() == QDialog::Accepted)
{
// calculate the total width/height table would need without scaling
const int rows = tableWidget->model()->rowCount();
const int cols = tableWidget->model()->columnCount();
double totalWidth = 0.0;

for (int c = 0; c < cols; ++c)
{
totalWidth += tableWidget->columnWidth(c);
}

double totalHeight = 0.0;

for (int r = 0; r < rows; ++r)
{
totalHeight += tableWidget->rowHeight(r);
}

// redirect table's painting on a pixmap
QPixmap pixmap(totalWidth, totalHeight);
QPainter::setRedirected(tableWidget->viewport(), &pixmap);
QPaintEvent event(QRect(0, 0, totalWidth, totalHeight));
QApplication::sendEvent(tableWidget->viewport(), &event);
QPainter::restoreRedirected(tableWidget->viewport());

// print scaled pixmap
QPainter painter(&printer);
painter.scale(4,4);
//painter.drawPixmap(printer.pageRect(), pixmap, pixmap.rect());
painter.drawPixmap(printer.pageRect().topLeft(), pixmap, pixmap.rect());
}

What to add to get it?

Thanks you very much for your help,

Roby

[Methedrine]

I don't see where you paint the header? You're only printing the rows of the table, while the horizontal- and verticalHeaders are neither rows, nor columns.

For simplification you could use the render() functionality to easily print your tablewidget into a pixmap.

[rmagro]

Thanks Methedrine for your reply,

Indeed I did not print the header because I didn't know how to do it combined with the rows.

Then, thanks also for the tips tou gave me about the render()..
Would you be so kind to some examples ?

Roby

[Methedrine]

Thanks Methedrine for your reply,

Indeed I did not print the header because I didn't know how to do it combined with the rows.

Then, thanks also for the tips tou gave me about the render()..
Would you be so kind to some examples ?

Roby

See the docs, there's an example on what you need:
QWidget::render()
:cool:

[rmagro]

but QWidget::render() is not a member of QTableWidget

and I need to print a QTableWidget..

Thank you,

Roberto.

[jacek]

but QWidget::render() is not a member of QTableWidget
QTableWidget is a QWidget too. Although that method was introduced in Qt 4.3, so if you use some earlier Qt version, you can't use it.

[rmagro]

I am using QT 4 and render is not a render is not a member of QWidget anymore..

any suggestions about how to get the point using the first code I posted?

Thank you,

Roby

[Methedrine]

I am using QT 4 and render is not a render is not a member of QWidget anymore..

Precisely, you are using a Qt 4 version < 4.3.0, as such, render is not yet a member of QWidget :p



any suggestions about how to get the point using the first code I posted?

Thank you,

Roby

Just fetch the horizontalHeader() from QTableWidget, get its height and draw it onto the pixmap before you draw the rows you have.

[rmagro]

I did like this ...


QPrinter printer(QPrinter::HighResolution);
printer.setOrientation(QPrinter::Landscape);

QPrintDialog dlg(&printer, this);

if (dlg.exec() == QDialog::Accepted)
{
// calculate the total width/height table would need without scaling
const int rows = tableWidget->model()->rowCount();
const int cols = tableWidget->model()->columnCount();

double totalWidth = 0.0;

for (int c = 0; c < cols; ++c)
{
totalWidth += tableWidget->columnWidth(c);
}

double totalHeight = tableWidget->horizontalHeader()->height();

for (int r = 0; r < rows; ++r)
{
totalHeight += tableWidget->rowHeight(r);
}


// redirect table's painting on a pixmap
QPixmap pixmap(totalWidth, totalHeight );

QPainter::setRedirected(tableWidget->horizontalHeader()->viewport(), &pixmap);
QPainter::setRedirected(tableWidget->viewport(), &pixmap);

QPaintEvent event(QRect(0, 0, totalWidth, totalHeight ));

QApplication::sendEvent(tableWidget->horizontalHeader()->viewport(), &event);
QApplication::sendEvent(tableWidget->viewport(), &event);

QPainter::restoreRedirected(tableWidget->horizontalHeader()->viewport());
QPainter::restoreRedirected(tableWidget->viewport());



// print scaled pixmap
QPainter painter(&printer);
painter.scale(4,4);
//painter.drawPixmap(printer.pageRect(), pixmap, pixmap.rect());
painter.drawPixmap(printer.pageRect().topLeft(), pixmap, pixmap.rect());
}

but I do not get the point..

What's wrong with that code??

Thank you for your patience

Roby

[rmagro]

If I change the order of the instructions in the section
" // redirect table's painting on a pixmap "
I get both the horizontal header and the rows printed out BUT they are overlapped..

How to adjust the situation??


// redirect table's painting on a pixmap
QPixmap pixmap(totalWidth, totalHeight);


QPainter::setRedirected(tableWidget->viewport(), &pixmap);
QPainter::setRedirected(tableWidget->horizontalHeader()->viewport(), &pixmap);

QPaintEvent event(QRect(0, 0, totalWidth, totalHeight));


QApplication::sendEvent(tableWidget->viewport(), &event);
QApplication::sendEvent(tableWidget->horizontalHeader()->viewport(), &event);

QPainter::restoreRedirected(tableWidget->viewport());
QPainter::restoreRedirected(tableWidget->horizontalHeader()->viewport());




// print scaled pixmap
QPainter painter(&printer);
painter.scale(4,4);
//painter.drawPixmap(printer.pageRect(), pixmap, pixmap.rect());
painter.drawPixmap(printer.pageRect().topLeft(), pixmap, pixmap.rect());

Thanks for help,

Roby