qdesigner_propertycommand.cpp

来自「奇趣公司比较新的qt/emd版本」· C++ 代码 · 共 1,210 行 · 第 1/4 页

        if (mask & maskBit) {
            for (int group = QPalette::Active; group < QPalette::NColorGroups;  group++) {
                const QPalette::ColorGroup pgroup = static_cast<QPalette::ColorGroup>(group);
                const QPalette::ColorRole prole =  static_cast<QPalette::ColorRole>(role);
                rc.setColor(pgroup, prole, newValue.color(pgroup, prole));
            }
            // Set the resolve bit from NewValue in return value
            uint r = rc.resolve();
            const bool origFlag = newValue.resolve() & maskBit;
            if (origFlag)
                r |= maskBit;
            else
                r &= ~maskBit;
            rc.resolve(r);
        }
    }
    return rc;
}

// apply changed subproperties to  a QAlignment which is a flag combination of vertical and horizontal
Qt::Alignment applyAlignmentSubProperty(Qt::Alignment oldValue, Qt::Alignment newValue, unsigned mask)
{
    // easy: both changed.
    if (mask == (SubPropertyHorizontalAlignment|SubPropertyVerticalAlignment))
        return newValue;
    // Change subprop
    const Qt::Alignment changeMask   = (mask & SubPropertyHorizontalAlignment) ? Qt::AlignHorizontal_Mask : Qt::AlignVertical_Mask;
    const Qt::Alignment takeOverMask = (mask & SubPropertyHorizontalAlignment) ? Qt::AlignVertical_Mask   : Qt::AlignHorizontal_Mask;
    return (oldValue & takeOverMask) | (newValue & changeMask);
}

// apply changed subproperties to a variant
QVariant applySubProperty(const QVariant &oldValue, const QVariant &newValue, qdesigner_internal::SpecialProperty specialProperty, unsigned mask)
{
    if (mask == SubPropertyAll)
        return newValue;

    switch (oldValue.type()) {
    case QVariant::Rect:
        return applyRectSubProperty(oldValue.toRect(), newValue.toRect(), mask);
    case QVariant::Size:
        return applySizeSubProperty(oldValue.toSize(), newValue.toSize(), mask);
    case QVariant::SizePolicy:
        return qVariantFromValue(applySizePolicySubProperty(qvariant_cast<QSizePolicy>(oldValue), qvariant_cast<QSizePolicy>(newValue), mask));
    case QVariant::Font:
        return qVariantFromValue(applyFontSubProperty(qvariant_cast<QFont>(oldValue), qvariant_cast<QFont>(newValue), mask));
    case QVariant::Palette:
        return qVariantFromValue(applyPaletteSubProperty(qvariant_cast<QPalette>(oldValue), qvariant_cast<QPalette>(newValue), mask));
    default:
        // Enumerations, flags
        switch (specialProperty) {
        case qdesigner_internal::SP_Alignment: {
            qdesigner_internal::FlagType f = qvariant_cast<qdesigner_internal::FlagType>(oldValue);
            f.value = static_cast<uint>(applyAlignmentSubProperty(variantToAlignment(oldValue), variantToAlignment(newValue), mask));
            QVariant v;
            qVariantSetValue(v, f);
            return v;
                                               }
        default:
        break;
        }
        break;
    }
    return newValue;

}
}

namespace qdesigner_internal {

// figure out special property
enum SpecialProperty getSpecialProperty(const QString& propertyName)
{
    if (propertyName == QLatin1String("objectName"))
        return SP_ObjectName;
    if (propertyName == QLatin1String("icon"))
        return SP_Icon;
    if (propertyName == QLatin1String("currentTabName"))
        return SP_CurrentTabName;
    if (propertyName == QLatin1String("geometry"))
        return SP_Geometry;
    if (propertyName == QLatin1String("windowTitle"))
        return SP_WindowTitle;
    if (propertyName == QLatin1String("minimumSize"))
        return SP_MinimumSize;
    if (propertyName == QLatin1String("maximumSize"))
        return SP_MaximumSize;
    if (propertyName == QLatin1String("alignment"))
        return SP_Alignment;
    if (propertyName == QLatin1String("autoDefault"))
        return SP_AutoDefault;
    return SP_None;
}


PropertyHelper::PropertyHelper(QObject* object,
                               SpecialProperty specialProperty,
                               QDesignerPropertySheetExtension *sheet,
                               int index) :
    m_specialProperty(specialProperty),
    m_object(object),
    m_objectType(OT_Object),
    m_propertySheet(sheet),  m_index(index),
    m_oldValue(m_propertySheet->property(m_index), m_propertySheet->isChanged(m_index))
{
    if (object->isWidgetType()) {
        m_parentWidget = (qobject_cast<QWidget*>(object))->parentWidget();
        m_objectType = OT_Widget;
    } else {
        if (const QAction *action = qobject_cast<const QAction *>(m_object))
            m_objectType = action->associatedWidgets().empty() ? OT_FreeAction : OT_AssociatedAction;
    }

    if(debugPropertyCommands)
        qDebug() << "PropertyHelper on " << m_object->objectName() << " index= " << m_index << " type = " << m_objectType;
}

QDesignerIntegration *PropertyHelper::integration(QDesignerFormWindowInterface *fw) const
{
    return qobject_cast<QDesignerIntegration *>(fw->core()->integration());
}

// Set widget value, apply corrections and checks in case of main window.
void PropertyHelper::checkApplyWidgetValue(QDesignerFormWindowInterface *fw, QWidget* w,
                                      SpecialProperty specialProperty, QVariant &value)
{

    bool isMainContainer = false;
    if (QDesignerFormWindowCursorInterface *cursor = fw->cursor()) {
        if (cursor->isWidgetSelected(w)) {
            if (cursor->isWidgetSelected(fw->mainContainer())) {
                isMainContainer = true;
            }
        }
    }
    if (!isMainContainer)
        return;

    QWidget *container = fw->core()->integration()->containerWindow(fw);
    if (!container)
        return;


    switch (specialProperty) {
    case SP_MinimumSize: {
        const QSize diff = diffSize(fw);
        const QSize size = checkSize(value.toSize());
        container->setMinimumSize((size + diff).expandedTo(QSize(16, 16)));
        qVariantSetValue(value, size);
    }

        break;
    case SP_MaximumSize: {
        QSize fs, cs;
        checkSizes(fw, value.toSize(), &fs, &cs);
        container->setMaximumSize(cs);
        fw->mainContainer()->setMaximumSize(fs);
        qVariantSetValue(value, fs);

    }
        break;
    case SP_Geometry: {
        QRect r = value.toRect();
        QSize fs, cs;
        checkSizes(fw, r.size(), &fs, &cs);
        container->resize(cs);
        r.setSize(fs);
        qVariantSetValue(value, r);
    }
        break;
    default:
        break;
    }
}

unsigned PropertyHelper::updateMask() const
{
    unsigned rc = 0;
    switch (m_specialProperty) {
    case SP_ObjectName:
    case SP_CurrentTabName:
        if (m_objectType != OT_FreeAction)
            rc |=  UpdateObjectInspector;
        break;
    case  SP_Icon:
        if (m_objectType == OT_AssociatedAction)
            rc |=  UpdateObjectInspector;
        break;
    default:
        break;

    }
    return rc;
}


bool PropertyHelper::canMerge(const PropertyHelper &other) const
{
    return m_object == other.m_object &&  m_index == other.m_index;
}

// Update the object to reflect the changes
void PropertyHelper::updateObject(QDesignerFormWindowInterface *fw, const QVariant &oldValue, const QVariant &newValue)
{
    if(debugPropertyCommands){
         qDebug() << "PropertyHelper::updateObject(" << m_object->objectName() << ") " << oldValue << " -> " << newValue;
    }
    switch (m_objectType) {
    case OT_Widget: {
        switch (m_specialProperty) {
        case SP_ObjectName:
            QDesignerFormWindowCommand::updateBuddies(fw, oldValue.toString(), newValue.toString());
            break;
        default:
            break;
        }
    } break;
    case OT_AssociatedAction:
    case OT_FreeAction:
        if (m_specialProperty == SP_ObjectName) {
            QAction *act = qobject_cast<QAction *>(m_object);
            act->setData(QVariant(true)); // this triggers signal "changed" in QAction
            act->setData(QVariant(false));
        }
        break;
    default:
        break;
    }

    if (m_specialProperty == SP_ObjectName) {
        QDesignerIntegration *integr = integration(fw);
        if (integr)
            integr->emitObjectNameChanged(fw, m_object, newValue.toString());
    }
}

PropertyHelper::Value PropertyHelper::setValue(QDesignerFormWindowInterface *fw, const QVariant &value, bool changed, unsigned subPropertyMask)
{
    // Set new whole value
    if (subPropertyMask == SubPropertyAll)
        return  applyValue(fw, m_oldValue.first, Value(value, changed));

    // apply subproperties
    const QVariant maskedNewValue = applySubProperty(m_oldValue.first, value, m_specialProperty, subPropertyMask);
    return applyValue(fw, m_oldValue.first, Value(maskedNewValue, changed));
}

// Apply the value and update. Returns corrected value
PropertyHelper::Value PropertyHelper::applyValue(QDesignerFormWindowInterface *fw, const QVariant &oldValue, Value newValue)
{
     if(debugPropertyCommands){
         qDebug() << "PropertyHelper::applyValue(" << m_object->objectName() << ") " << oldValue << " -> " << newValue.first << " changed=" << newValue.second;
     }

    if (m_objectType ==  OT_Widget) {
        checkApplyWidgetValue(fw, qobject_cast<QWidget *>(m_object), m_specialProperty, newValue.first);
    }

    m_propertySheet->setProperty(m_index, newValue.first);
    m_propertySheet->setChanged(m_index, newValue.second);
    if (m_specialProperty == SP_ObjectName) {
        fw->ensureUniqueObjectName(m_object);
        newValue.first = m_propertySheet->property(m_index);
    }

    updateObject(fw, oldValue, newValue.first);
    return newValue;
}

PropertyHelper::Value PropertyHelper::restoreOldValue(QDesignerFormWindowInterface *fw)
{
    return applyValue(fw, m_propertySheet->property(m_index), m_oldValue);
}

// find the default value in widget DB in case PropertySheet::reset fails
QVariant PropertyHelper::findDefaultValue(QDesignerFormWindowInterface *fw) const
{
    if (m_specialProperty == SP_AutoDefault && qobject_cast<const QPushButton*>(m_object)) {
        // AutoDefault defaults to true on dialogs
        const bool isDialog = qobject_cast<const QDialog *>(fw->mainContainer());
        return QVariant(isDialog);
    }

    const int item_idx = fw->core()->widgetDataBase()->indexOfObject(m_object);
    if (item_idx == -1)
        return  m_oldValue.first; // We simply don't know the value in this case

    const QDesignerWidgetDataBaseItemInterface *item = fw->core()->widgetDataBase()->item(item_idx);
    const QList<QVariant> default_prop_values = item->defaultPropertyValues();
    if (m_index < default_prop_values.size())
        return default_prop_values.at(m_index);

    if (m_oldValue.first.type() == QVariant::Color)
        return QColor();

    return m_oldValue.first; // Again, we just don't know
}

PropertyHelper::Value PropertyHelper::restoreDefaultValue(QDesignerFormWindowInterface *fw)
{

    Value defaultValue = qMakePair(QVariant(), false);
    const QVariant currentValue = m_propertySheet->property(m_index);