qwizard.cpp

奇趣公司比较新的qt/emd版本

    q->setMaximumSize(mainLayout->totalMaximumSize());
    if (info.header && headerWidget->maximumWidth() != QWIDGETSIZE_MAX)
        q->setFixedWidth(headerWidget->maximumWidth());
    if (info.watermark)
        q->setFixedHeight(mainLayout->totalSizeHint().height());
}

bool QWizardPrivate::ensureButton(QWizard::WizardButton which) const
{
    if (uint(which) >= QWizard::NButtons)
        return false;

    if (!btns[which]) {
        QPushButton *pushButton = new QPushButton(antiFlickerWidget);
#ifdef Q_WS_MAC
        pushButton->setAutoDefault(false);
#endif
        pushButton->hide();
#ifdef Q_CC_HPACC
        const_cast<QWizardPrivate *>(this)->btns[which] = pushButton;
#else
        btns[which] = pushButton;
#endif
        if (which < QWizard::NStandardButtons)
            pushButton->setText(buttonDefaultTexts.value(wizStyle).value(which));
        connectButton(which);
    }
    return true;
}

void QWizardPrivate::connectButton(QWizard::WizardButton which) const
{
    Q_Q(const QWizard);
    if (which < QWizard::NStandardButtons) {
        QObject::connect(btns[which], SIGNAL(clicked()), q, buttonSlots[which]);
    } else {
        QObject::connect(btns[which], SIGNAL(clicked()), q, SLOT(_q_emitCustomButtonClicked()));
    }
}

void QWizardPrivate::updateButtonTexts()
{
    Q_Q(QWizard);
    for (int i = 0; i < QWizard::NButtons; ++i) {
        if (btns[i]) {
            if (q->currentPage() && (q->currentPage()->d_func()->buttonCustomTexts.contains(i)))
                btns[i]->setText(q->currentPage()->d_func()->buttonCustomTexts.value(i));
            else if (buttonCustomTexts.contains(i))
                btns[i]->setText(buttonCustomTexts.value(i));
            else if (i < QWizard::NStandardButtons)
                btns[i]->setText(buttonDefaultTexts.value(wizStyle).value(i));
        }
    }
}

void QWizardPrivate::updateButtons()
{
    if (buttonsHaveCustomLayout) {
        QVarLengthArray<QWizard::WizardButton> array(buttonsCustomLayout.count());
        for (int i = 0; i < buttonsCustomLayout.count(); ++i)
            array[i] = buttonsCustomLayout.at(i);
        setButtonLayout(array.constData(), array.count());
    } else {
        // Positions:
        //     Help Stretch Custom1 Custom2 Custom3 Cancel Back Next Commit Finish Cancel Help

        const int ArraySize = 12;
        QWizard::WizardButton array[ArraySize];
        memset(array, -1, sizeof(array));
        Q_ASSERT(array[0] == QWizard::NoButton);

        if (opts & QWizard::HaveHelpButton) {
            int i = (opts & QWizard::HelpButtonOnRight) ? 11 : 0;
            array[i] = QWizard::HelpButton;
        }
        array[1] = QWizard::Stretch;
        if (opts & QWizard::HaveCustomButton1)
            array[2] = QWizard::CustomButton1;
        if (opts & QWizard::HaveCustomButton2)
            array[3] = QWizard::CustomButton2;
        if (opts & QWizard::HaveCustomButton3)
            array[4] = QWizard::CustomButton3;

        if (!(opts & QWizard::NoCancelButton)) {
            int i = (opts & QWizard::CancelButtonOnLeft) ? 5 : 10;
            array[i] = QWizard::CancelButton;
        }
        array[6] = QWizard::BackButton;
        array[7] = QWizard::NextButton;
        array[8] = QWizard::CommitButton;
        array[9] = QWizard::FinishButton;

        setButtonLayout(array, ArraySize);
    }
}

void QWizardPrivate::setButtonLayout(const QWizard::WizardButton *array, int size)
{
    QWidget *prev = pageFrame;

    for (int i = buttonLayout->count() - 1; i >= 0; --i) {
        QLayoutItem *item = buttonLayout->takeAt(i);
        if (QWidget *widget = item->widget())
            widget->hide();
        delete item;
    }

    for (int i = 0; i < size; ++i) {
        QWizard::WizardButton which = array[i];
        if (which == QWizard::Stretch) {
            buttonLayout->addStretch(1);
        } else if (which != QWizard::NoButton) {
            ensureButton(which);
            buttonLayout->addWidget(btns[which]);

            // Back, Next, Commit, and Finish are handled in _q_updateButtonStates()
            if (which != QWizard::BackButton && which != QWizard::NextButton
                && which != QWizard::CommitButton && which != QWizard::FinishButton)
                btns[which]->show();

            if (prev)
                QWidget::setTabOrder(prev, btns[which]);
            prev = btns[which];
        }
    }

    _q_updateButtonStates();
}

bool QWizardPrivate::buttonLayoutContains(QWizard::WizardButton which)
{
    return !buttonsHaveCustomLayout || buttonsCustomLayout.contains(which);
}

void QWizardPrivate::updatePixmap(QWizard::WizardPixmap which)
{
    Q_Q(QWizard);
    if (which == QWizard::BackgroundPixmap) {
        if (wizStyle == QWizard::MacStyle) {
            q->update();
            q->updateGeometry();
        }
    } else {
        updateLayout();
    }
}

#if !defined(QT_NO_STYLE_WINDOWSVISTA)
void QWizardPrivate::handleAeroStyleChange()
{
    Q_Q(QWizard);
    if (wizStyle == QWizard::AeroStyle) {
        vistaHelper->setDWMTitleBar(QVistaHelper::ExtendedTitleBar);
        q->installEventFilter(vistaHelper);
        q->setMouseTracking(true); // due to faked title bar
        antiFlickerWidget->move(0, vistaHelper->titleBarSize() + vistaHelper->topOffset());
        QObject::connect(
            vistaHelper->backButton(), SIGNAL(clicked()), q, buttonSlots[QWizard::BackButton]);
        vistaHelper->backButton()->show();
    } else {
        vistaHelper->setDWMTitleBar(QVistaHelper::NormalTitleBar);
        q->removeEventFilter(vistaHelper);
        q->setMouseTracking(false); // ### reset to original value (which could be true!)
        antiFlickerWidget->move(0, 0);
        vistaHelper->backButton()->disconnect();
        vistaHelper->backButton()->hide();
    }

    _q_updateButtonStates();
    updateButtonTexts(); // ### assume this is required - 2 B TESTED!

    if (q->isVisible())
        vistaHelper->setWindowPosHack();
}
#endif

void QWizardPrivate::disableUpdates()
{
    Q_Q(QWizard);
    if (disableUpdatesCount++ == 0) {
        q->setUpdatesEnabled(false);
        antiFlickerWidget->hide();
    }
}

void QWizardPrivate::enableUpdates()
{
    Q_Q(QWizard);
    if (--disableUpdatesCount == 0) {
        antiFlickerWidget->show();
        q->setUpdatesEnabled(true);
    }
}

void QWizardPrivate::_q_emitCustomButtonClicked()
{
    Q_Q(QWizard);
    QObject *button = q->sender();
    for (int i = QWizard::NStandardButtons; i < QWizard::NButtons; ++i) {
        if (btns[i] == button) {
            emit q->customButtonClicked(QWizard::WizardButton(i));
            break;
        }
    }
}

void QWizardPrivate::_q_updateButtonStates()
{
    Q_Q(QWizard);

    disableUpdates();

    const QWizardPage *page = q->currentPage();
    bool complete = page && page->isComplete();

    btn.back->setEnabled(history.count() > 1
                         && !q->page(history.at(history.count() - 2))->isCommitPage()
                         && (!canFinish || !(opts & QWizard::DisabledBackButtonOnLastPage)));
    btn.next->setEnabled(canContinue && complete);
    btn.commit->setEnabled(canContinue && complete);
    btn.finish->setEnabled(canFinish && complete);

    const bool backButtonVisible = buttonLayoutContains(QWizard::BackButton)
        && (history.count() > 1 || !(opts & QWizard::NoBackButtonOnStartPage))
        && (canContinue || !(opts & QWizard::NoBackButtonOnLastPage));
    bool commitPage = page && page->isCommitPage();
    btn.back->setVisible(backButtonVisible);
    btn.next->setVisible(buttonLayoutContains(QWizard::NextButton) && !commitPage
                         && (canContinue || (opts & QWizard::HaveNextButtonOnLastPage)));
    btn.commit->setVisible(buttonLayoutContains(QWizard::CommitButton) && commitPage
                           && canContinue);
    btn.finish->setVisible(buttonLayoutContains(QWizard::FinishButton)
                           && (canFinish || (opts & QWizard::HaveFinishButtonOnEarlyPages)));

    bool useDefault = !(opts & QWizard::NoDefaultButton);
    if (QPushButton *nextPush = qobject_cast<QPushButton *>(btn.next))
        nextPush->setDefault(canContinue && useDefault && !commitPage);
    if (QPushButton *commitPush = qobject_cast<QPushButton *>(btn.commit))
        commitPush->setDefault(canContinue && useDefault && commitPage);
    if (QPushButton *finishPush = qobject_cast<QPushButton *>(btn.finish))
        finishPush->setDefault(!canContinue && useDefault);

#if !defined(QT_NO_STYLE_WINDOWSVISTA)
    if (wizStyle == QWizard::AeroStyle) {
        vistaHelper->backButton()->setEnabled(btn.back->isEnabled());
        vistaHelper->backButton()->setVisible(backButtonVisible);
        btn.back->setVisible(false);
    }
#endif

    enableUpdates();
}

#ifdef Q_WS_MAC

#ifdef Q_WS_MAC32
#include <QuickTime/QuickTime.h>
typedef OSErr (*PtrQTNewDataReferenceFromCFURL)(CFURLRef, UInt32, Handle*, OSType*);
typedef OSErr (*PtrGetGraphicsImporterForDataRefWithFlags)(Handle, OSType, ComponentInstance*, long);
typedef ComponentResult (*PtrGraphicsImportSetFlags)(GraphicsImportComponent, long);
typedef ComponentResult (*PtrGraphicsImportCreateCGImage)(GraphicsImportComponent, CGImageRef*, UInt32);

static PtrQTNewDataReferenceFromCFURL ptrQTNewDataReferenceFromCFURL = 0;
static PtrGetGraphicsImporterForDataRefWithFlags ptrGetGraphicsImporterForDataRefWithFlags = 0;
static PtrGraphicsImportSetFlags ptrGraphicsImportSetFlags = 0;
static PtrGraphicsImportCreateCGImage ptrGraphicsImportCreateCGImage = 0;

static bool resolveQuickTimeSymbols()
{
    if (ptrQTNewDataReferenceFromCFURL == 0) {
        QLibrary library(QLatin1String("/System/Library/Frameworks/QuickTime.framework/QuickTime"));
        ptrQTNewDataReferenceFromCFURL = reinterpret_cast<PtrQTNewDataReferenceFromCFURL>(library.resolve("QTNewDataReferenceFromCFURL"));
        ptrGetGraphicsImporterForDataRefWithFlags = reinterpret_cast<PtrGetGraphicsImporterForDataRefWithFlags>(library.resolve("GetGraphicsImporterForDataRefWithFlags"));
        ptrGraphicsImportSetFlags = reinterpret_cast<PtrGraphicsImportSetFlags>(library.resolve("GraphicsImportSetFlags"));
        ptrGraphicsImportCreateCGImage = reinterpret_cast<PtrGraphicsImportCreateCGImage>(library.resolve("GraphicsImportCreateCGImage"));
    }

    return ptrQTNewDataReferenceFromCFURL != 0 && ptrGetGraphicsImporterForDataRefWithFlags != 0
           && ptrGraphicsImportSetFlags != 0 && ptrGraphicsImportCreateCGImage != 0;
}


static QPixmap quicktimeTiff(const CFURLRef url)
{
    if (!resolveQuickTimeSymbols())
        return QPixmap();

    QCFType <CGImageRef> imageRef = 0;
    Handle dataRef;
    OSType dataRefType;
    GraphicsImportComponent gi;
    ComponentResult result;
    result = ptrQTNewDataReferenceFromCFURL(url, 0, &dataRef, &dataRefType);
    if (dataRef != 0) {
        OSStatus err = ptrGetGraphicsImporterForDataRefWithFlags(dataRef, dataRefType, &gi, 0);
        if (err == noErr && gi) {
            result = ptrGraphicsImportSetFlags(gi, (kGraphicsImporterDontDoGammaCorrection
                                                    + kGraphicsImporterDontUseColorMatching));
            if (!result)
                result = ptrGraphicsImportCreateCGImage(gi, &imageRef, 0);
            if (result)
                qWarning("Qt: Problem reading TIFF image %ld(%s:%d)", result, __FILE__, __LINE__);
            DisposeHandle(dataRef);
            CloseComponent(gi);
        }
    }

    if (imageRef)
        return QPixmap::fromMacCGImageRef(imageRef);
    return QPixmap();
}
#endif // Q_WS_MAC32

QPixmap QWizardPrivate::findDefaultBackgroundPixmap()
{
    QCFType<CFURLRef> url;
    const int ExpectedImageWidth = 242;
    const int ExpectedImageHeight = 414;
    if (LSFindApplicationForInfo(kLSUnknownCreator, CFSTR("com.apple.KeyboardSetupAssistant"),
                                 0, 0, &url) == noErr) {
        QCFType<CFBundleRef> bundle = CFBundleCreate(kCFAllocatorDefault, url);
        if (bundle) {
            url = CFBundleCopyResourceURL(bundle, CFSTR("Background"), CFSTR("tif"), 0);
            if (url) {
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
                if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_4) {
                    QCFType<CGImageSourceRef> imageSource = CGImageSourceCreateWithURL(url, 0);
                    QCFType<CGImageRef> image = CGImageSourceCreateImageAtIndex(imageSource, 0, 0);
                    if (image) {
                        int width = CGImageGetWidth(image);
                        int height = CGImageGetHeight(image);
                        if (width == ExpectedImageWidth && height == ExpectedImageHeight)
                            return QPixmap::fromMacCGImageRef(image);
                    }
                } else
#endif
                {
#ifdef Q_WS_MAC32
                    return quicktimeTiff(url);
#endif
                }
            }
        }
    }
    return QPixmap();

}

#endif

#if !defined(QT_NO_STYLE_WINDOWSVISTA)
void QWizardAntiFlickerWidget::paintEvent(QPaintEvent *)
{
    if (wizard->wizardStyle() == QWizard::AeroStyle) {
        int leftMargin, topMargin, rightMargin, bottomMargin;
        wizardPrivate->buttonLayout->getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin);
        const int buttonLayoutTop = wizardPrivate->buttonLayout->contentsRect().top() - topMargin;
        QPainter painter(this);
        const QBrush brush(QColor(240, 240, 240)); // ### hardcoded for now
        painter.fillRect(0, buttonLayoutTop, width(), height() - buttonLayoutTop, brush);
        painter.setPen(QPen(QBrush(QColor(223, 223, 223)), 0)); // ### hardcoded for now
        painter.drawLine(0, buttonLayoutTop, width(), buttonLayoutTop);
    }
}
#endif

/*!
    \class QWizard
    \since 4.3
    \brief The QWizard class provides a framework for wizards.

    A wizard (also called an assistant on Mac OS X) is a special type
    of input dialog that consists of a sequence of pages. A wizard's
    purpose is to guide the user through a process step by step.
    Wizards are useful for complex or infrequent tasks that users may
    find difficult to learn.