Print a QDialog in a PDF file

[jjay]

Hi,

I have to save a QDialog : mainWindow (with all his children : QTextEdit, QTableView, ...) in a pdf file.

But when I do that :

QPrinter prn;
prn.setOutputFileName("out.pdf");
QPrintDialog(&prn, mainWindow).exec();
mainWindow.render(&prn);

QPrinter prn;
prn.setOutputFileName("out.pdf");
QPrintDialog(&prn, mainWindow).exec();
mainWindow.render(&prn);

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Only mainWindow is printed
How can I print all children ?

Thanks

[jpn]

QWidget::render() takes a flag whether to render children or not. By default it does, and it does render children for me:

// main.cpp
#include <QtGui>
 
class Window : public QMainWindow
{
    Q_OBJECT
 
public:
    Window()
    {
        menuBar()->addAction("Render", this, SLOT(doRender()));
 
        QTextEdit* textEdit = new QTextEdit(this);
        textEdit->setHtml("<h1>Hello</h1>");
        setCentralWidget(textEdit);
    }
 
private slots:
    void doRender()
    {
        QPixmap pixmap(size());
        render(&pixmap); 
        pixmap.save("render.png");
    }
};
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Window window;
    window.show();
    return app.exec();
}
 
#include "main.moc"

// main.cpp
#include <QtGui>

class Window : public QMainWindow
{
    Q_OBJECT

public:
    Window()
    {
        menuBar()->addAction("Render", this, SLOT(doRender()));

        QTextEdit* textEdit = new QTextEdit(this);
        textEdit->setHtml("<h1>Hello</h1>");
        setCentralWidget(textEdit);
    }

private slots:
    void doRender()
    {
        QPixmap pixmap(size());
        render(&pixmap); 
        pixmap.save("render.png");
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Window window;
    window.show();
    return app.exec();
}

#include "main.moc"

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[Gopala Krishna]

Hi,

I have to save a QDialog : mainWindow (with all his children : QTextEdit, QTableView, ...) in a pdf file.

But when I do that :

QPrinter prn;
prn.setOutputFileName("out.pdf");
QPrintDialog(&prn, mainWindow).exec();
mainWindow.render(&prn);

QPrinter prn;
prn.setOutputFileName("out.pdf");
QPrintDialog(&prn, mainWindow).exec();
mainWindow.render(&prn);

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Only mainWindow is printed
How can I print all children ?

Thanks

Probably the dialog isn't child of mainwindow ?

[jjay]

Finaly I tried this but only the last child (QTextEdit) is in my pdf. I expected 2 QpushButton and 1 QTextEdit

#include <QApplication>
#include <QDialog>
#include <QPushButton>
#include <QTextEdit>
#include <QPrinter>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
	QDialog *lc_dialog = new QDialog;
	lc_dialog->setGeometry(400,400,500,100);
 
	QPushButton *button1 = new QPushButton(lc_dialog);
	QPushButton *button2 = new QPushButton(lc_dialog);
	button1->setText("ok");
	button2->setText("Concel");
 
	button1->setGeometry(15, lc_dialog->size().height() - 30, lc_dialog->size().width()/2 -20, 30);
	button2->setGeometry(lc_dialog->size().width()/2 + 5, lc_dialog->size().height() - 30, lc_dialog->size().width()/2 -20, 30);
 
	QTextEdit *textEdit = new QTextEdit(lc_dialog);
	textEdit->setText("Petit texte brut de test");
	textEdit->setGeometry(0, 0, lc_dialog->size().width(), 50);
 
	button1->show();
	button2->show();
	lc_dialog->show();
 
	QPrinter prn;
	prn.setOutputFileName("/Path/to/my/pdf/out.pdf");
 
	lc_dialog->render(&prn, QPoint(), QRegion(), QWidget::DrawChildren | QWidget::DrawWindowBackground);
 
    return a.exec();
}

#include <QApplication>
#include <QDialog>
#include <QPushButton>
#include <QTextEdit>
#include <QPrinter>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

	QDialog *lc_dialog = new QDialog;
	lc_dialog->setGeometry(400,400,500,100);
	
	QPushButton *button1 = new QPushButton(lc_dialog);
	QPushButton *button2 = new QPushButton(lc_dialog);
	button1->setText("ok");
	button2->setText("Concel");

	button1->setGeometry(15, lc_dialog->size().height() - 30, lc_dialog->size().width()/2 -20, 30);
	button2->setGeometry(lc_dialog->size().width()/2 + 5, lc_dialog->size().height() - 30, lc_dialog->size().width()/2 -20, 30);
	
	QTextEdit *textEdit = new QTextEdit(lc_dialog);
	textEdit->setText("Petit texte brut de test");
	textEdit->setGeometry(0, 0, lc_dialog->size().width(), 50);

	button1->show();
	button2->show();
	lc_dialog->show();
	
	QPrinter prn;
	prn.setOutputFileName("/Path/to/my/pdf/out.pdf");

	lc_dialog->render(&prn, QPoint(), QRegion(), QWidget::DrawChildren | QWidget::DrawWindowBackground);

    return a.exec();
}

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In attachement :
- out.pdf : The pdf generated
- image 2.png the picture expected

[jpn]

I suppose the problem is that the dialog, including its children, isn't even visible yet by the time you attempt to render it. QWidget::show() doesn't show the dialog immediately but schedules a show event. Widgets aren't usually polished until necessary eg. when they become visible.

[jjay]

I suppose the problem is that the dialog, including its children, isn't even visible yet by the time you attempt to render it. QWidget::show() doesn't show the dialog immediately but schedules a show event. Widgets aren't usually polished until necessary eg. when they become visible.

Ok, so i tried this :

main.cpp

#include <QApplication>
#include "MainWindow.h"
 
int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	MainWindow *lc_dialog = new MainWindow;
	lc_dialog->show();
	return a.exec();
}

#include <QApplication>
#include "MainWindow.h"

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	MainWindow *lc_dialog = new MainWindow;
	lc_dialog->show();
	return a.exec();
}

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MainWindow.h :

class MainWindow: public QMainWindow
{
	Q_OBJECT
public:
	MainWindow();
public slots:
	void print();
};

class MainWindow: public QMainWindow
{
	Q_OBJECT
public:
	MainWindow();
public slots:
	void print();
};

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and MainWindow.cpp :

#include "MainWindow.h"
#include <iostream>
#include <QPushButton>
#include <QTextEdit>
#include <QPrinter>
 
using namespace std;
 
MainWindow::MainWindow()
	:QMainWindow()
{
	cout << "MainWindow - start" << endl;
	this->setGeometry(400,400,500,100);
	QPushButton *button1 = new QPushButton(this);
	QPushButton *button2 = new QPushButton(this);
	button1->setText("ok");
	button2->setText("Concel");
	button1->setGeometry(15, this->size().height() - 30, this->size().width()/2 -20, 30);
	button2->setGeometry(this->size().width()/2 + 5, this->size().height() - 30, this->size().width()/2 -20, 30);
 
	QTextEdit *textEdit = new QTextEdit(this);
	textEdit->setText("Petit texte brut de test");
	textEdit->setGeometry(0, 0, this->size().width(), 50);
 
	button1->show();
	button2->show();
 
	connect(button1, SIGNAL(clicked()), this, SLOT(print()) );
	connect(button2, SIGNAL(clicked()), this, SLOT(print()) );
 
	this->show();
	cout << "MainWindow - end" << endl;
}
 
 
void MainWindow::print()
{
	cout << "print - start" << endl;
	QPrinter prn;
	prn.setOutputFileName("/Path/to/my/pdf/out.pdf");
	render(&prn, QPoint(), QRegion(), QWidget::DrawChildren | QWidget::DrawWindowBackground);
	cout << "print - end" << endl;
}

#include "MainWindow.h"
#include <iostream>
#include <QPushButton>
#include <QTextEdit>
#include <QPrinter>

using namespace std;

MainWindow::MainWindow()
	:QMainWindow()
{
	cout << "MainWindow - start" << endl;
	this->setGeometry(400,400,500,100);
	QPushButton *button1 = new QPushButton(this);
	QPushButton *button2 = new QPushButton(this);
	button1->setText("ok");
	button2->setText("Concel");
	button1->setGeometry(15, this->size().height() - 30, this->size().width()/2 -20, 30);
	button2->setGeometry(this->size().width()/2 + 5, this->size().height() - 30, this->size().width()/2 -20, 30);
	
	QTextEdit *textEdit = new QTextEdit(this);
	textEdit->setText("Petit texte brut de test");
	textEdit->setGeometry(0, 0, this->size().width(), 50);

	button1->show();
	button2->show();

	connect(button1, SIGNAL(clicked()), this, SLOT(print()) );
	connect(button2, SIGNAL(clicked()), this, SLOT(print()) );

	this->show();
	cout << "MainWindow - end" << endl;
}


void MainWindow::print()
{
	cout << "print - start" << endl;
	QPrinter prn;
	prn.setOutputFileName("/Path/to/my/pdf/out.pdf");
	render(&prn, QPoint(), QRegion(), QWidget::DrawChildren | QWidget::DrawWindowBackground);
	cout << "print - end" << endl;
}

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I have the same issue
This is the log :

[Session started at 2008-02-23 23:55:39 +0100.]
MainWindow - start
MainWindow - end
print - start
print - end

[Session started at 2008-02-23 23:55:39 +0100.]
MainWindow - start
MainWindow - end
print - start
print - end

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[jjay]

There is a bug which has been reported before:
http://trolltech.com/developer/task-...ntry&id=192565