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()); 
    }

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()); 
    }

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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()

[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

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());
	}

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());
	}

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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());

// 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());

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Thanks for help,

Roby