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complexwizard.cpp Example File
^{dialogs/complexwizard/complexwizard.cpp}

    /****************************************************************************
    **
    ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
    **
    ** This file is part of the documentation of the Qt Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QtGui>

    #include "complexwizard.h"

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

        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;
        mainLayout->addLayout(buttonLayout);
        setLayout(mainLayout);
    }

    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()));

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