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# complexwizard.cpp Example File
dialogs/complexwizard/complexwizard.cpp

        #include <QtGui>

        #include "complexwizard.h"

        ComplexWizard::ComplexWizard(QWidget *parent)
            : QDialog(parent)
        {
            cancelButton = new QPushButton(tr("Cancel"), this);
            backButton = new QPushButton(tr("< &Back"), this);
            nextButton = new QPushButton(tr("Next >"), this);
            finishButton = new QPushButton(tr("&Finish"), this);

            connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
            connect(backButton, SIGNAL(clicked()), this, SLOT(backButtonClicked()));
            connect(nextButton, SIGNAL(clicked()), this, SLOT(nextButtonClicked()));
            connect(finishButton, SIGNAL(clicked()), this, SLOT(accept()));

            buttonLayout = new QHBoxLayout;
            buttonLayout->addStretch(1);
            buttonLayout->addWidget(cancelButton);
            buttonLayout->addWidget(backButton);
            buttonLayout->addWidget(nextButton);
            buttonLayout->addWidget(finishButton);

            mainLayout = new QVBoxLayout(this);
            mainLayout->addLayout(buttonLayout);
        }

        void ComplexWizard::setFirstPage(WizardPage *page)
        {
            page->resetPage();
            history.append(page);
            switchPage(0);
        }

        void ComplexWizard::backButtonClicked()
        {
            WizardPage *oldPage = history.takeLast();
            oldPage->resetPage();
            switchPage(oldPage);
        }

        void ComplexWizard::nextButtonClicked()
        {
            WizardPage *oldPage = history.last();
            WizardPage *newPage = oldPage->nextPage();
            newPage->resetPage();
            history.append(newPage);
            switchPage(oldPage);
        }

        void ComplexWizard::completeStateChanged()
        {
            WizardPage *currentPage = history.last();
            if (currentPage->isLastPage())
                finishButton->setEnabled(currentPage->isComplete());
            else
                nextButton->setEnabled(currentPage->isComplete());
        }

        void ComplexWizard::switchPage(WizardPage *oldPage)
        {
            if (oldPage) {
                oldPage->hide();
                mainLayout->removeWidget(oldPage);
                disconnect(oldPage, SIGNAL(completeStateChanged()), this, SLOT(completeStateChanged()));
            }

            WizardPage *newPage = history.last();
            mainLayout->insertWidget(0, newPage);
            newPage->show();
            newPage->setFocus();
            connect(newPage, SIGNAL(completeStateChanged()), this, SLOT(completeStateChanged()));

            bool isLastPage = newPage->isLastPage();

            backButton->setEnabled(history.size() != 1);
            nextButton->setEnabled(!isLastPage);
            finishButton->setEnabled(isLastPage);
            if (isLastPage) {
                finishButton->setDefault(true);
            } else {
                nextButton->setDefault(true);
            }

            completeStateChanged();
        }

        WizardPage::WizardPage(QWidget *parent)
            : QWidget(parent)
        {
            hide();
        }

        void WizardPage::resetPage()
        {
        }

        WizardPage *WizardPage::nextPage()
        {
            return 0;
        }

        bool WizardPage::isLastPage()
        {
            return false;
        }

        bool WizardPage::isComplete()
        {
            return true;
        }