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# licensewizard.cpp Example File
dialogs/licensewizard/licensewizard.cpp

     /****************************************************************************
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     **
     ** This file is part of the documentation of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
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    ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
    ** included in the packaging of this file.  Alternatively you may (at
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    ** (or its successors, if any) and the KDE Free Qt Foundation. In
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    ** GPL_EXCEPTION.txt in this package.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
    ** you are unsure which license is appropriate for your use, please
    ** review the following information:
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    ** or contact the sales department at sales@trolltech.com.
    **
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    ** Integration plug-in the right for the Qt/Eclipse Integration to
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     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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     ****************************************************************************/

     #include <QtGui>

     #include "licensewizard.h"

     LicenseWizard::LicenseWizard(QWidget *parent)
         : QWizard(parent)
     {
         setPage(Page_Intro, new IntroPage);
         setPage(Page_Evaluate, new EvaluatePage);
         setPage(Page_Register, new RegisterPage);
         setPage(Page_Details, new DetailsPage);
         setPage(Page_Conclusion, new ConclusionPage);

         setStartId(Page_Intro);

     #ifndef Q_WS_MAC
         setWizardStyle(ModernStyle);
     #endif
         setOption(HaveHelpButton, true);
         setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo.png"));

         connect(this, SIGNAL(helpRequested()), this, SLOT(showHelp()));

         setWindowTitle(tr("License Wizard"));
     }

     void LicenseWizard::showHelp()
     {
         static QString lastHelpMessage;

         QString message;

         switch (currentId()) {
         case Page_Intro:
             message = tr("The decision you make here will affect which page you "
                          "get to see next.");
             break;
         case Page_Evaluate:
             message = tr("Make sure to provide a valid email address, such as "
                          "toni.buddenbrook@example.de.");
             break;
         case Page_Register:
             message = tr("If you don't provide an upgrade key, you will be "
                          "asked to fill in your details.");
             break;
         case Page_Details:
             message = tr("Make sure to provide a valid email address, such as "
                          "thomas.gradgrind@example.co.uk.");
             break;
         case Page_Conclusion:
             message = tr("You must accept the terms and conditions of the "
                          "license to proceed.");
             break;
         default:
             message = tr("This help is likely not to be of any help.");
         }

         if (lastHelpMessage == message)
             message = tr("Sorry, I already gave what help I could. "
                          "Maybe you should try asking a human?");

         QMessageBox::information(this, tr("License Wizard Help"), message);

         lastHelpMessage = message;
     }

     IntroPage::IntroPage(QWidget *parent)
         : QWizardPage(parent)
     {
         setTitle(tr("Introduction"));
         setPixmap(QWizard::WatermarkPixmap, QPixmap(":/images/watermark.png"));

         topLabel = new QLabel(tr("This wizard will help you register your copy of "
                                  "<i>Super Product One</i>&trade; or start "
                                  "evaluating the product."));
         topLabel->setWordWrap(true);

         registerRadioButton = new QRadioButton(tr("&Register your copy"));
         evaluateRadioButton = new QRadioButton(tr("&Evaluate the product for 30 "
                                                   "days"));
         registerRadioButton->setChecked(true);

         QVBoxLayout *layout = new QVBoxLayout;
         layout->addWidget(topLabel);
         layout->addWidget(registerRadioButton);
         layout->addWidget(evaluateRadioButton);
         setLayout(layout);
     }

     int IntroPage::nextId() const
     {
         if (evaluateRadioButton->isChecked()) {
             return LicenseWizard::Page_Evaluate;
         } else {
             return LicenseWizard::Page_Register;
         }
     }

     EvaluatePage::EvaluatePage(QWidget *parent)
         : QWizardPage(parent)
     {
         setTitle(tr("Evaluate <i>Super Product One</i>&trade;"));
         setSubTitle(tr("Please fill both fields. Make sure to provide a valid "
                        "email address (e.g., john.smith@example.com)."));

         nameLabel = new QLabel(tr("N&ame:"));
         nameLineEdit = new QLineEdit;
         nameLabel->setBuddy(nameLineEdit);

         emailLabel = new QLabel(tr("&Email address:"));
         emailLineEdit = new QLineEdit;
         emailLineEdit->setValidator(new QRegExpValidator(QRegExp(".*@.*"), this));
         emailLabel->setBuddy(emailLineEdit);

         registerField("evaluate.name*", nameLineEdit);
         registerField("evaluate.email*", emailLineEdit);

         QGridLayout *layout = new QGridLayout;
         layout->addWidget(nameLabel, 0, 0);
         layout->addWidget(nameLineEdit, 0, 1);
         layout->addWidget(emailLabel, 1, 0);
         layout->addWidget(emailLineEdit, 1, 1);
         setLayout(layout);
     }

     int EvaluatePage::nextId() const
     {
         return LicenseWizard::Page_Conclusion;
     }

     RegisterPage::RegisterPage(QWidget *parent)
         : QWizardPage(parent)
     {
         setTitle(tr("Register Your Copy of <i>Super Product One</i>&trade;"));
         setSubTitle(tr("If you have an upgrade key, please fill in "
                        "the appropriate field."));

         nameLabel = new QLabel(tr("N&ame:"));
         nameLineEdit = new QLineEdit;
         nameLabel->setBuddy(nameLineEdit);

         upgradeKeyLabel = new QLabel(tr("&Upgrade key:"));
         upgradeKeyLineEdit = new QLineEdit;
         upgradeKeyLabel->setBuddy(upgradeKeyLineEdit);

         registerField("register.name*", nameLineEdit);
         registerField("register.upgradeKey", upgradeKeyLineEdit);

         QGridLayout *layout = new QGridLayout;
         layout->addWidget(nameLabel, 0, 0);
         layout->addWidget(nameLineEdit, 0, 1);
         layout->addWidget(upgradeKeyLabel, 1, 0);
         layout->addWidget(upgradeKeyLineEdit, 1, 1);
         setLayout(layout);
     }

     int RegisterPage::nextId() const
     {
         if (upgradeKeyLineEdit->text().isEmpty()) {
             return LicenseWizard::Page_Details;
         } else {
             return LicenseWizard::Page_Conclusion;
         }
     }

     DetailsPage::DetailsPage(QWidget *parent)
         : QWizardPage(parent)
     {
         setTitle(tr("Fill In Your Details"));
         setSubTitle(tr("Please fill all three fields. Make sure to provide a valid "
                        "email address (e.g., tanaka.aya@example.co.jp)."));

         companyLabel = new QLabel(tr("&Company name:"));
         companyLineEdit = new QLineEdit;
         companyLabel->setBuddy(companyLineEdit);

         emailLabel = new QLabel(tr("&Email address:"));
         emailLineEdit = new QLineEdit;
         emailLineEdit->setValidator(new QRegExpValidator(QRegExp(".*@.*"), this));
         emailLabel->setBuddy(emailLineEdit);

         postalLabel = new QLabel(tr("&Postal address:"));
         postalLineEdit = new QLineEdit;
         postalLabel->setBuddy(postalLineEdit);

         registerField("details.company*", companyLineEdit);
         registerField("details.email*", emailLineEdit);
         registerField("details.postal*", postalLineEdit);

         QGridLayout *layout = new QGridLayout;
         layout->addWidget(companyLabel, 0, 0);
         layout->addWidget(companyLineEdit, 0, 1);
         layout->addWidget(emailLabel, 1, 0);
         layout->addWidget(emailLineEdit, 1, 1);
         layout->addWidget(postalLabel, 2, 0);
         layout->addWidget(postalLineEdit, 2, 1);
         setLayout(layout);
     }

     int DetailsPage::nextId() const
     {
         return LicenseWizard::Page_Conclusion;
     }

     ConclusionPage::ConclusionPage(QWidget *parent)
         : QWizardPage(parent)
     {
         setTitle(tr("Complete Your Registration"));
         setPixmap(QWizard::WatermarkPixmap, QPixmap(":/images/watermark.png"));

         bottomLabel = new QLabel;
         bottomLabel->setWordWrap(true);

         agreeCheckBox = new QCheckBox(tr("I agree to the terms of the license"));

         registerField("conclusion.agree*", agreeCheckBox);

         QVBoxLayout *layout = new QVBoxLayout;
         layout->addWidget(bottomLabel);
         layout->addWidget(agreeCheckBox);
         setLayout(layout);
     }

     int ConclusionPage::nextId() const
     {
         return -1;
     }

     void ConclusionPage::initializePage()
     {
         QString licenseText;

         if (wizard()->hasVisitedPage(LicenseWizard::Page_Evaluate)) {
             licenseText = tr("<u>Evaluation License Agreement:</u> "
                              "You can use this software for 30 days and make one "
                              "backup, but you are not allowed to distribute it.");
         } else if (wizard()->hasVisitedPage(LicenseWizard::Page_Details)) {
             licenseText = tr("<u>First-Time License Agreement:</u> "
                              "You can use this software subject to the license "
                              "you will receive by email.");
         } else {
             licenseText = tr("<u>Upgrade License Agreement:</u> "
                              "This software is licensed under the terms of your "
                              "current license.");
         }
         bottomLabel->setText(licenseText);
     }

     void ConclusionPage::setVisible(bool visible)
     {
         QWizardPage::setVisible(visible);

         if (visible) {
             wizard()->setButtonText(QWizard::CustomButton1, tr("&Print"));
             wizard()->setOption(QWizard::HaveCustomButton1, true);
             connect(wizard(), SIGNAL(customButtonClicked(int)),
                     this, SLOT(printButtonClicked()));
         } else {
             wizard()->setOption(QWizard::HaveCustomButton1, false);
             disconnect(wizard(), SIGNAL(customButtonClicked(int)),
                        this, SLOT(printButtonClicked()));
         }
     }

     void ConclusionPage::printButtonClicked()
     {
         QPrinter printer;
         QPrintDialog dialog(&printer, this);
         if (dialog.exec())
             QMessageBox::warning(this, tr("Print License"),
                                  tr("As an environmentally friendly measure, the "
                                     "license text will not actually be printed."));
     }