C++ QSizePolicy::horizontalStretch方法代码示例

QString KPropertySizePolicyDelegate::valueToString(const QVariant& value, const QLocale &locale) const
{
    const QSizePolicy sp(value.value<QSizePolicy>());
    if (locale.language() == QLocale::C) {
        return QString::fromLatin1("%1, %2, %3, %4")
                .arg(KPropertyUtils::keyForEnumValue("SizePolicy", sp.horizontalPolicy()))
                .arg(KPropertyUtils::keyForEnumValue("SizePolicy", sp.verticalPolicy()))
                .arg(sp.horizontalStretch())
                .arg(sp.verticalStretch());
    }
    return QObject::tr("%1, %2, %3, %4", "Size Policy")
        .arg(s_sizePolicyListData->nameForPolicy(sp.horizontalPolicy()))
        .arg(s_sizePolicyListData->nameForPolicy(sp.verticalPolicy()))
        .arg(locale.toString(sp.horizontalStretch()))
        .arg(locale.toString(sp.verticalStretch()));
}

void GUI_Player::showLibrary(bool b, bool resize)
{
    m_settings->setNoShowLibrary(!b);
    int old_width = this->width();
    int lib_width = this->ui->library_widget->width();
    int new_width = old_width;
    this->ui->library_widget->setVisible(b);

    if (!b) {
        // invisble
        QSizePolicy p = this->ui->library_widget->sizePolicy();
        m_library_stretch_factor = p.horizontalStretch();

        p.setHorizontalStretch(0);
        this->ui->library_widget->setSizePolicy(p);
        m_library_width = lib_width;
        new_width = old_width - lib_width;
        //this->setMinimumSize(300, 400);
    } else {
        // visible
        QSizePolicy p = this->ui->library_widget->sizePolicy();
        p.setHorizontalStretch(m_library_stretch_factor);
        this->ui->library_widget->setSizePolicy(p);
        new_width = old_width + m_library_width;
        //this->setMinimumSize(650, 400);
    }

    if (resize) {
        QRect rect = this->geometry();
        rect.setWidth(new_width);
        rect.setHeight(this->height());
        this->setGeometry(rect);
    }
}

void SizePolicyComposedProperty::setValue(Property *property,
    const QVariant &value, bool rememberOldValue)
{
    const QSizePolicy sp( value.value<QSizePolicy>() );
    property->child("hor_policy")->setValue(sp.horizontalPolicy(), rememberOldValue, false);
    property->child("vert_policy")->setValue(sp.verticalPolicy(), rememberOldValue, false);
    property->child("hor_stretch")->setValue(sp.horizontalStretch(), rememberOldValue, false);
    property->child("vert_stretch")->setValue(sp.verticalStretch(), rememberOldValue, false);
}

QString SizePolicyDelegate::displayText( const QVariant& value ) const
{
    const QSizePolicy sp(value.value<QSizePolicy>());

    return QString::fromLatin1(SIZEPOLICY_MASK)
        .arg(s_sizePolicyListData->nameForPolicy(sp.horizontalPolicy()))
        .arg(s_sizePolicyListData->nameForPolicy(sp.verticalPolicy()))
        .arg(sp.horizontalStretch())
        .arg(sp.verticalStretch());
}

static QString sizePolicyToString(const QSizePolicy &p)
{
    QString rc; {
        QTextStream str(&rc);
        str << "Control=" << p.controlType() << " expdirs=" << p.expandingDirections()
            << " hasHeightForWidth=" << p.hasHeightForWidth()
            << " H: Policy=" << p.horizontalPolicy()
            << " stretch=" << p.horizontalStretch()
            << " V: Policy=" << p.verticalPolicy()
            << " stretch=" << p.verticalStretch();
    }
    return rc;
}

int QSplitterLayoutStruct::getWidgetSize(Qt::Orientation orient)
{
    if (sizer == -1) {
        QSize s = widget->sizeHint();
        const int presizer = pick(s, orient);
        const int realsize = pick(widget->size(), orient);
        if (!s.isValid() || (widget->testAttribute(Qt::WA_Resized) && (realsize > presizer))) {
            sizer = pick(widget->size(), orient);
        } else {
            sizer = presizer;
        }
        QSizePolicy p = widget->sizePolicy();
        int sf = (orient == Qt::Horizontal) ? p.horizontalStretch() : p.verticalStretch();
        if (sf > 1)
            sizer *= sf;
    }
    return sizer;
}

static int getStretch(const QWidget *w)
{
    QSizePolicy sp = w->sizePolicy();
    return qMax(sp.horizontalStretch(), sp.verticalStretch());
}

void QSplitterPrivate::doResize()
{
    Q_Q(QSplitter);
    QRect r = q->contentsRect();
    int n = list.count();
    QVector<QLayoutStruct> a(n*2);
    int i;

    bool noStretchFactorsSet = true;
    for (i = 0; i < n; ++i) {
        QSizePolicy p = list.at(i)->widget->sizePolicy();
        int sf = orient == Qt::Horizontal ? p.horizontalStretch() : p.verticalStretch();
        if (sf != 0) {
            noStretchFactorsSet = false;
            break;
        }
    }

    int j=0;
    for (i = 0; i < n; ++i) {
        QSplitterLayoutStruct *s = list.at(i);
#ifdef QSPLITTER_DEBUG
        qDebug("widget %d hidden: %d collapsed: %d handle hidden: %d", i, s->widget->isHidden(),
               s->collapsed, s->handle->isHidden());
#endif

        a[j].init();
        if (s->handle->isHidden()) {
            a[j].maximumSize = 0;
        } else {
            a[j].sizeHint = a[j].minimumSize = a[j].maximumSize = s->getHandleSize(orient);
            a[j].empty = false;
        }
        ++j;

        a[j].init();
        if (s->widget->isHidden() || s->collapsed) {
            a[j].maximumSize = 0;
        } else {
            a[j].minimumSize = pick(qSmartMinSize(s->widget));
            a[j].maximumSize = pick(s->widget->maximumSize());
            a[j].empty = false;

            bool stretch = noStretchFactorsSet;
            if (!stretch) {
                QSizePolicy p = s->widget->sizePolicy();
                int sf = orient == Qt::Horizontal ? p.horizontalStretch() : p.verticalStretch();
                stretch = (sf != 0);
            }
            if (stretch) {
                a[j].stretch = s->getWidgetSize(orient);
                a[j].sizeHint = a[j].minimumSize;
                a[j].expansive = true;
            } else {
                a[j].sizeHint = qMax(s->getWidgetSize(orient), a[j].minimumSize);
            }
        }
        ++j;
    }

    qGeomCalc(a, 0, n*2, pick(r.topLeft()), pick(r.size()), 0);

#ifdef QSPLITTER_DEBUG
    for (i = 0; i < n*2; ++i) {
        qDebug("%*s%d: stretch %d, sh %d, minS %d, maxS %d, exp %d, emp %d -> %d, %d",
               i, "", i,
               a[i].stretch,
               a[i].sizeHint,
               a[i].minimumSize,
               a[i].maximumSize,
               a[i].expansive,
               a[i].empty,
               a[i].pos,
               a[i].size);
    }
#endif

    for (i = 0; i < n; ++i) {
        QSplitterLayoutStruct *s = list.at(i);
        setGeo(s, a[i*2+1].pos, a[i*2+1].size, false);
    }
}

//.........这里部分代码省略.........
#ifndef QT_NO_CURSOR
    case QVariant::Cursor: {
        const QMetaEnum cursorShape_enum = metaEnum<QAbstractFormBuilderGadget>("cursorShape");
        dom_prop->setElementCursorShape(QLatin1String(cursorShape_enum.valueToKey(qvariant_cast<QCursor>(v).shape())));
        }
        return true;
#endif

    case QVariant::KeySequence: {
        DomString *s = new DomString();
        s->setText(qvariant_cast<QKeySequence>(v).toString(QKeySequence::PortableText));
        dom_prop->setElementString(s);
        }
        return true;

    case QVariant::Locale: {
        DomLocale *dom = new DomLocale();
        const QLocale locale = qvariant_cast<QLocale>(v);

        const QMetaEnum language_enum = metaEnum<QAbstractFormBuilderGadget>("language");
        const QMetaEnum country_enum = metaEnum<QAbstractFormBuilderGadget>("country");

        dom->setAttributeLanguage(QLatin1String(language_enum.valueToKey(locale.language())));
        dom->setAttributeCountry(QLatin1String(country_enum.valueToKey(locale.country())));

        dom_prop->setElementLocale(dom);
        }
        return true;

    case QVariant::SizePolicy: {
        DomSizePolicy *dom = new DomSizePolicy();
        const QSizePolicy sizePolicy = qvariant_cast<QSizePolicy>(v);

        dom->setElementHorStretch(sizePolicy.horizontalStretch());
        dom->setElementVerStretch(sizePolicy.verticalStretch());

        const QMetaEnum sizeType_enum = metaEnum<QAbstractFormBuilderGadget>("sizeType");

        dom->setAttributeHSizeType(QLatin1String(sizeType_enum.valueToKey(sizePolicy.horizontalPolicy())));
        dom->setAttributeVSizeType(QLatin1String(sizeType_enum.valueToKey(sizePolicy.verticalPolicy())));

        dom_prop->setElementSizePolicy(dom);
    }
        return true;

    case QVariant::Date: {
        DomDate *dom = new DomDate();
        const QDate date = qvariant_cast<QDate>(v);

        dom->setElementYear(date.year());
        dom->setElementMonth(date.month());
        dom->setElementDay(date.day());

        dom_prop->setElementDate(dom);
        }
        return true;

    case QVariant::Time: {
        DomTime *dom = new DomTime();
        const QTime time = qvariant_cast<QTime>(v);

        dom->setElementHour(time.hour());
        dom->setElementMinute(time.minute());
        dom->setElementSecond(time.second());

        dom_prop->setElementTime(dom);