[SOLVED] PDF Print in multiple pages

mourad_bilog

Hello everyone,
I'm trying to print data from QStringList into a PDF File using the QPrint Class. My function is like :
QString pdfFile = QFileDialog::getSaveFileName(this, tr("Ouvrir fichier"), "/", tr("Fichier pdf (*.pdf)"));

if(pdfFile.isEmpty())
	return;

int nbColonnes = header.size();
int nbDonnees = donnees.size();

QPrinter printer; //The QPrinter class is a paint device that paints on a printer
printer.setOutputFormat(QPrinter::PdfFormat); 
printer.setOrientation(QPrinter::Landscape); 
printer.setPageSize(QPrinter::A4);

//this can be also NativeFormat or PostScriptFormat
//for details, read QPrinter class documentation
printer.setOutputFileName(pdfFile);
QPainter painter; //The QPainter class performs painting on widgets and other paint devices (such as QPrinter)
    
//here we start painting to the printer
if (!painter.begin(&printer))
{
	QMessageBox::critical(this, NAME_APP, "Fichier pdf non crée");
     return;
}

int x = 0;
int y = 0;  

QRect r;
for (int k=0; k<nbColonnes; k++)
{
	// bilog-mh cf. TL-20819 : Paraméterer largeur des colonnes à afficher
	if (k==0)
		colonne_width = 70;
	else if (k==1)
		colonne_width = 130;
	else if (k==2)
		colonne_width = 150;
	else if (k==3)
		colonne_width = 700;

	QRect required = QRect(); //this represent the required rectangled size
	r = QRect(x, 0, colonne_width, 60); //this represent our calculated rectangle size
	painter.drawRect(r);
	//now we insert each string of the list into the rectangle
	QString text = header.at(k);
	//now we draw the text into the given rectangle, using word wrap option.
	//the last parameter indicates a rectangle in which the text should be enclosed         
	painter.drawText(r, Qt::AlignCenter | Qt::TextWordWrap, text, &required);
	//if the calculated height is not enought for drawing the text, we should redraw all rectangles
	 x += colonne_width;			  
}

x = 0;
for (int k=0; k<nbDonnees; k++)
{
	// bilog-mh cf. TL-20819 : Paraméterer largeur des colonnes à afficher
	switch ((k+1)%4)
	{
	case 1 :
			colonne_width = 70;
			break;
	case 2:
			colonne_width = 130;
			break;
	case 3 :
			colonne_width = 150;
			break;
	case 0 :
			colonne_width = 700;
			break;
	}
		
	if (k%nbColonnes == 0)
	{
		// bilog-mh cf. TL-20819 : si première ligne de données alors on retient le height de la ligne header
		if (k== 0)
			y += 60;
		else
			y += 200;
		x = 0;
	}

	QRect required = QRect(); //this represent the required rectangled size
	r = QRect(x, y, colonne_width, 200); //this represent our calculated rectangle size
	painter.drawRect(r);
	//now we insert each string of the list into the rectangle
	QString txt = donnees.at(k);		
	//now we draw the text into the given rectangle, using word wrap option.
	//the last parameter indicates a rectangle in which the text should be enclosed         
	painter.drawText(r, Qt::AlignJustify | Qt::TextWordWrap, txt, &required);

	 x += colonne_width;		 
	 
	// bilog-mh cf. TL-20819 : si on atteint la fin de page, on insère un nouvelle page
	if (y > printer.height())
		printer.newPage();
}
painter.end();

The problem is that only the first page display data and the other pages are blank.

Does anyone have an idea what I'm wrong et tell me how to modify my function to display all data ?
Many thanks in advance for your useful help.
Best regards.

mcosta

@mourad_bilog said:

The problem is that only the first page display data and the other pages are blank.

Is the first page printed correctly??

Could you add a qDebug() line inside this statement to be sure is executed??

if (y > printer.height())
    printer.newPage();

like

if (y > printer.height()) {
    qDebug() << "New Page";
    printer.newPage();
}

mourad_bilog

Thanks for reply.

I've verified it and the printer.newPage(); is executed. In fact, the output file have 77 pages but only the first page contains data and the others are all blank.

mcosta

I'm not 100% sure but could you reset y=0 when you start a new page??

mourad_bilog

Ohhhh yeees.
It's Ok :)
Many thanks for your help

mcosta

Ok,

don't forget to mark the thread as solved (add [SOLVED] prefix to the thread title)

filipdns

@mourad_bilog
Hello Mourad, I'm trying to print pdf in multiple page also but with table creation with data from SQLite, did you do that already? do you have sample code for that?

Best regards
Philippe

mrjj

@filipdns
Hi
To print data from a db, you use
qsqldatabase + QSqlQuery and use
painter.drawText to paint a table.

You can also use QTableView + QSqlTableModel and print an image of the
QTableView to get cell painting etc.

Alternatively you can use a report generator like
https://sourceforge.net/projects/qtrpt/

filipdns

@mrjj Thanks a lot for your reply, the report generator look very nice but I don't understand yet how to include this to my project to make automatic report by click button, I have to study again the readme ;-)

filipdns

@mrjj just in case I can not found how to use the report generator, do you have a small sample code with qsqldatabase + QSqlQuery and use painter.drawText to paint a table?
thank you very much

mrjj

@filipdns

Hi
I have not seen any samples that uses text. most print an image.

filipdns

@mrjj I understand, thank you

mrjj

@filipdns

Im wondering how you want the table to look ?

With captions and cells lines and all the bells?
or would something like

Name        Age  Phone
-----------------------------
Mister Muh  12   0014545454545
Miss Miaow  12   0045454
Dude        66   66-66-66-66

Be enough ?

(made with tabs)

filipdns

@mrjj I would like add logo but your example is good point to start

mrjj

@filipdns
Hi
well to add logo, you just draw an image
with drawPixmap where you want.

filipdns

@mrjj oki, thanks I will try that.

Do you have code sample to get result like you show before from SQLite table?

mrjj

@filipdns
Well to get result, it would be using
http://doc.qt.io/qt-5/sql-sqlstatements.html

(in paintEvent/print)
  QPainter painter(printer);  
  QSqlQuery query;
  query.exec("SELECT name, salary FROM employee WHERE salary > 50000");
    while (query.next()) {
        QString name = query.value(0).toString();
        int salary = query.value(1).toInt();
       QString text = name +"\t" + salary ; // make one row line with tabs
       painter->drawText(x, y, width, height, Qt::TextExpandTabs , text); // fix width, height 
//     that would print one "row" tabbed
    }

All names for tables etc are ofc wrong here. Must use your real names.

filipdns

@mrjj thank you so much!! I will try that!!

filipdns

@mrjj Hello I try that but I got error :
erreur : C2819: type 'QPainter' does not have an overloaded member 'operator ->'
erreur : C2232: '->QPainter::drawText': left operand has 'class' type, use '.'
erreur : C2065: 'x': undeclared identifier
erreur : C2065: 'y': undeclared identifier
erreur : C3861: 'width': identifier not found
erreur : C3861: 'height': identifier not found

void print()

{


    QPrinter printer(QPrinter::HighResolution);
    //printer.setResolution(1200);
    printer.setOrientation(QPrinter::Portrait);
    printer.setPageSize(QPrinter::A4);
    QPrintDialog *dlg = new QPrintDialog(&printer,0);
    if(dlg->exec() == QDialog::Accepted) {
        //QPainter::Antialiasing;
        QPainter::TextAntialiasing;
        QPainter painter(&printer);
        QSqlQuery query;
        query.exec("SELECT date_etape, immatriculation FROM flight_log");
        while (query.next()) {
            QString date_etape = query.value(0).toString();
            QString immatriculation = query.value(1).toString();
            QString text = date_etape +"\t" + immatriculation ; // make one row line with tabs
            painter->drawText(x, y, width, height, Qt::TextExpandTabs , text); // fix width, height
            //     that would print one "row" tabbed
        }

        painter.end();
    }

mrjj

@filipdns said in

erreur : C2819: type 'QPainter' does not have an overloaded member 'operator ->'
erreur : C2232: '->QPainter::drawText': left operand has 'class' type, use '.'
Those are because painter is not pointer so -> should be .
painter->draw.. should be painter.drawText

erreur : C2065: 'x': undeclared identifier
erreur : C2065: 'y': undeclared identifier
erreur : C3861: 'width': identifier not found
erreur : C3861: 'height': identifier not found

You have define them
int x=0;
int y=0;
int width = ? ( whole page for width of table ?)
int height = ? ( whole page for height of table ?)

Here comes the the fun part.
For each drawText in the while loop
you must do y+=25; // ( actual line height is better but lets forget for a moment)

or it would just draw all text on top on each other so we have to change the y for a new row.