C++ QSizeF::width方法代码示例

 QSizeF sizeHint ( Qt::SizeHint which, const QSizeF & constraint = QSizeF() ) const {
    if (which != Qt::PreferredSize || constraint.width() == -1)
       return QGraphicsWidget::sizeHint(which, constraint);
    else
       return QSizeF( constraint.width(), constraint.width() );
 }

QPointF reoriginCenterTopLeft(const QPointF& origin,const QSizeF& size)
{
	return realPointAsPixelPosition(origin-QPointF(realAsPixelSize(size.width()/2.0),realAsPixelSize(size.height()/2.0)));
}

QRectF realRectAroundRealPoint(const QSizeF& rectSize)
{
	QPointF topleft = -QPointF(realPointAsPixelPosition(QPointF(rectSize.width()/2.0,rectSize.height()/2.0)));
	return QRectF(topleft,rectSize);
}

void QSvgText::draw(QPainter *p, QSvgExtraStates &states)
{
    applyStyle(p, states);
    qreal oldOpacity = p->opacity();
    p->setOpacity(oldOpacity * states.fillOpacity);

    // Force the font to have a size of 100 pixels to avoid truncation problems
    // when the font is very small.
    qreal scale = 100.0 / p->font().pointSizeF();
    Qt::Alignment alignment = states.textAnchor;

    QTransform oldTransform = p->worldTransform();
    p->scale(1 / scale, 1 / scale);

    qreal y = 0;
    bool initial = true;
    qreal px = m_coord.x() * scale;
    qreal py = m_coord.y() * scale;
    QSizeF scaledSize = m_size * scale;

    if (m_type == TEXTAREA) {
        if (alignment == Qt::AlignHCenter)
            px += scaledSize.width() / 2;
        else if (alignment == Qt::AlignRight)
            px += scaledSize.width();
    }

    QRectF bounds;
    if (m_size.height() != 0)
        bounds = QRectF(0, py, 1, scaledSize.height()); // x and width are not used.

    bool appendSpace = false;
    QVector<QString> paragraphs;
    QStack<QTextCharFormat> formats;
    QVector<QList<QTextLayout::FormatRange> > formatRanges;
    paragraphs.push_back(QString());
    formatRanges.push_back(QList<QTextLayout::FormatRange>());

    for (int i = 0; i < m_tspans.size(); ++i) {
        if (m_tspans[i] == LINEBREAK) {
            if (m_type == TEXTAREA) {
                if (paragraphs.back().isEmpty()) {
                    QFont font = p->font();
                    font.setPixelSize(font.pointSizeF() * scale);

                    QTextLayout::FormatRange range;
                    range.start = 0;
                    range.length = 1;
                    range.format.setFont(font);
                    formatRanges.back().append(range);

                    paragraphs.back().append(QLatin1Char(' '));;
                }
                appendSpace = false;
                paragraphs.push_back(QString());
                formatRanges.push_back(QList<QTextLayout::FormatRange>());
            }
        } else {
            WhitespaceMode mode = m_tspans[i]->whitespaceMode();
            m_tspans[i]->applyStyle(p, states);

            QFont font = p->font();
            font.setPixelSize(font.pointSizeF() * scale);

            QString newText(m_tspans[i]->text());
            newText.replace(QLatin1Char('\t'), QLatin1Char(' '));
            newText.replace(QLatin1Char('\n'), QLatin1Char(' '));

            bool prependSpace = !appendSpace && !m_tspans[i]->isTspan() && (mode == Default) && !paragraphs.back().isEmpty() && newText.startsWith(QLatin1Char(' '));
            if (appendSpace || prependSpace)
                paragraphs.back().append(QLatin1Char(' '));

            bool appendSpaceNext = (!m_tspans[i]->isTspan() && (mode == Default) && newText.endsWith(QLatin1Char(' ')));

            if (mode == Default) {
                newText = newText.simplified();
                if (newText.isEmpty())
                    appendSpaceNext = false;
            }

            QTextLayout::FormatRange range;
            range.start = paragraphs.back().length();
            range.length = newText.length();
            range.format.setFont(font);
            range.format.setTextOutline(p->pen());
            range.format.setForeground(p->brush());

            if (appendSpace) {
                Q_ASSERT(!formatRanges.back().isEmpty());
                ++formatRanges.back().back().length;
            } else if (prependSpace) {
                --range.start;
                ++range.length;
            }
            formatRanges.back().append(range);

            appendSpace = appendSpaceNext;
            paragraphs.back() += newText;

            m_tspans[i]->revertStyle(p, states);
//.........这里部分代码省略.........

static void _q_boundGeometryToSizeConstraints(const QRectF &startGeometry,
                                              QRectF *rect, Qt::WindowFrameSection section,
                                              const QSizeF &min, const QSizeF &max,
                                              const QGraphicsWidget *widget)
{
    const QRectF proposedRect = *rect;
    qreal width = qBound(min.width(), proposedRect.width(), max.width());
    qreal height = qBound(min.height(), proposedRect.height(), max.height());

    const bool hasHFW = QGraphicsLayoutItemPrivate::get(widget)->hasHeightForWidth();
    const bool hasWFH = QGraphicsLayoutItemPrivate::get(widget)->hasWidthForHeight();

    const bool widthChanged = proposedRect.width() != widget->size().width();
    const bool heightChanged = proposedRect.height() != widget->size().height();

    if (hasHFW || hasWFH) {
        if (widthChanged || heightChanged) {
            qreal minExtent;
            qreal maxExtent;
            qreal constraint;
            qreal proposed;
            if (hasHFW) {
                minExtent = min.height();
                maxExtent = max.height();
                constraint = width;
                proposed = proposedRect.height();
            } else {
                // width for height
                minExtent = min.width();
                maxExtent = max.width();
                constraint = height;
                proposed = proposedRect.width();
            }
            if (minimumHeightForWidth(constraint, minExtent, maxExtent, widget, hasHFW) > proposed) {
                QSizeF effectiveSize = closestAcceptableSize(QSizeF(width, height), widget);
                width = effectiveSize.width();
                height = effectiveSize.height();
            }
        }
    }

    switch (section) {
    case Qt::LeftSection:
        rect->setRect(startGeometry.right() - qRound(width), startGeometry.top(),
                      qRound(width), startGeometry.height());
        break;
    case Qt::TopLeftSection:
        rect->setRect(startGeometry.right() - qRound(width), startGeometry.bottom() - qRound(height),
                      qRound(width), qRound(height));
        break;
    case Qt::TopSection:
        rect->setRect(startGeometry.left(), startGeometry.bottom() - qRound(height),
                      startGeometry.width(), qRound(height));
        break;
    case Qt::TopRightSection:
        rect->setTop(rect->bottom() - qRound(height));
        rect->setWidth(qRound(width));
        break;
    case Qt::RightSection:
        rect->setWidth(qRound(width));
        break;
    case Qt::BottomRightSection:
        rect->setWidth(qRound(width));
        rect->setHeight(qRound(height));
        break;
    case Qt::BottomSection:
        rect->setHeight(qRound(height));
        break;
    case Qt::BottomLeftSection:
        rect->setRect(startGeometry.right() - qRound(width), startGeometry.top(),
                      qRound(width), qRound(height));
        break;
    default:
        break;
    }
}

void QDeclarativeWebView::updateDeclarativeWebViewSize()
{
    QSizeF size = d->view->geometry().size() * contentsScale();
    setImplicitWidth(size.width());
    setImplicitHeight(size.height());
}

            if ( m_haltFlag )
                return;
        }

        QImage img( d->previewSize, QImage::Format_ARGB32 );
        img.fill( Qt::transparent );
        QPainter p( &img );

        QSvgRenderer renderer( theme.graphicsFilePath() );

        QSizeF size = renderer.boundsOnElement(QStringLiteral("back")).size();
        size.scale( 1.5 * d->baseCardSize.width(), d->baseCardSize.height(), Qt::KeepAspectRatio );

        qreal yPos = ( d->previewSize.height() - size.height() ) / 2;
        qreal spacingWidth = d->baseCardSize.width()
                             * ( d->previewSize.width() - d->previewLayout.size() * size.width() )
                             / ( d->previewSize.width() - d->previewLayout.size() * d->baseCardSize.width() );

        qreal xPos = 0;
        foreach ( const QList<QString> & pile, d->previewLayout )
        {
            foreach ( const QString & card, pile )
            {
                renderer.render( &p, card, QRectF( QPointF( xPos, yPos ), size ) );
                xPos += 0.3 * spacingWidth;
            }
            xPos += 1 * size.width() + ( 0.1 - 0.3 ) * spacingWidth;
        }

        emit previewRendered( theme, img );
    }

//.........这里部分代码省略.........
    on_mDiagramTypeComboBox_currentIndexChanged( mDiagramTypeComboBox->currentIndex() );
  }
  else // already a diagram renderer present
  {
    //single category renderer or interpolated one?
    if ( dr->rendererName() == "SingleCategory" )
    {
      mFixedSizeRadio->setChecked( true );
    }
    else
    {
      mAttributeBasedScalingRadio->setChecked( true );
    }
    mDiagramSizeSpinBox->setEnabled( mFixedSizeRadio->isChecked() );
    mLinearScaleFrame->setEnabled( mAttributeBasedScalingRadio->isChecked() );
    mCheckBoxAttributeLegend->setChecked( dr->attributeLegend() );
    mCheckBoxSizeLegend->setChecked( dr->sizeLegend() );
    mSizeLegendSymbol.reset( dr->sizeLegendSymbol() ? dr->sizeLegendSymbol()->clone() : QgsMarkerSymbolV2::createSimple( QgsStringMap() ) );
    QIcon icon = QgsSymbolLayerV2Utils::symbolPreviewIcon( mSizeLegendSymbol.data(), mButtonSizeLegendSymbol->iconSize() );
    mButtonSizeLegendSymbol->setIcon( icon );

    //assume single category or linearly interpolated diagram renderer for now
    QList<QgsDiagramSettings> settingList = dr->diagramSettings();
    if ( !settingList.isEmpty() )
    {
      mDiagramFrame->setEnabled( settingList.at( 0 ).enabled );
      mDiagramFont = settingList.at( 0 ).font;
      QSizeF size = settingList.at( 0 ).size;
      mBackgroundColorButton->setColor( settingList.at( 0 ).backgroundColor );
      mTransparencySpinBox->setValue( settingList.at( 0 ).transparency * 100.0 / 255.0 );
      mTransparencySlider->setValue( mTransparencySpinBox->value() );
      mDiagramPenColorButton->setColor( settingList.at( 0 ).penColor );
      mPenWidthSpinBox->setValue( settingList.at( 0 ).penWidth );
      mDiagramSizeSpinBox->setValue(( size.width() + size.height() ) / 2.0 );
      // caution: layer uses scale denoms, widget uses true scales
      mScaleRangeWidget->setScaleRange( 1.0 / ( settingList.at( 0 ).maxScaleDenominator > 0 ? settingList.at( 0 ).maxScaleDenominator : layer->maximumScale() ),
                                        1.0 / ( settingList.at( 0 ).minScaleDenominator > 0 ? settingList.at( 0 ).minScaleDenominator : layer->minimumScale() ) );
      mScaleVisibilityGroupBox->setChecked( settingList.at( 0 ).scaleBasedVisibility );
      mDiagramUnitComboBox->setUnit( settingList.at( 0 ).sizeType );
      mDiagramUnitComboBox->setMapUnitScale( settingList.at( 0 ).sizeScale );
      mDiagramLineUnitComboBox->setUnit( settingList.at( 0 ).lineSizeUnit );
      mDiagramLineUnitComboBox->setMapUnitScale( settingList.at( 0 ).lineSizeScale );

      if ( settingList.at( 0 ).labelPlacementMethod == QgsDiagramSettings::Height )
      {
        mLabelPlacementComboBox->setCurrentIndex( 0 );
      }
      else
      {
        mLabelPlacementComboBox->setCurrentIndex( 1 );
      }

      mAngleOffsetComboBox->setCurrentIndex( mAngleOffsetComboBox->findData( settingList.at( 0 ).angleOffset ) );

      mOrientationLeftButton->setProperty( "direction", QgsDiagramSettings::Left );
      mOrientationRightButton->setProperty( "direction", QgsDiagramSettings::Right );
      mOrientationUpButton->setProperty( "direction", QgsDiagramSettings::Up );
      mOrientationDownButton->setProperty( "direction", QgsDiagramSettings::Down );
      switch ( settingList.at( 0 ).diagramOrientation )
      {
        case QgsDiagramSettings::Left:
          mOrientationLeftButton->setChecked( true );
          break;

        case QgsDiagramSettings::Right:
          mOrientationRightButton->setChecked( true );

/*!
   \return Icon representing the curve on the legend

   \param index Index of the legend entry 
                ( ignored as there is only one )
   \param size Icon size

   \sa QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()
 */
QwtGraphic QwtPlotCurve::legendIcon( int index, 
    const QSizeF &size ) const
{
    Q_UNUSED( index );

    if ( size.isEmpty() )
        return QwtGraphic();

    QwtGraphic graphic;
    graphic.setDefaultSize( size );
    graphic.setRenderHint( QwtGraphic::RenderPensUnscaled, true );

    QPainter painter( &graphic );
    painter.setRenderHint( QPainter::Antialiasing,
        testRenderHint( QwtPlotItem::RenderAntialiased ) );

    if ( d_data->legendAttributes == 0 ||
        d_data->legendAttributes & QwtPlotCurve::LegendShowBrush )
    {
        QBrush brush = d_data->brush;

        if ( brush.style() == Qt::NoBrush &&
            d_data->legendAttributes == 0 )
        {
            if ( style() != QwtPlotCurve::NoCurve )
            {
                brush = QBrush( pen().color() );
            }
            else if ( d_data->symbol &&
                ( d_data->symbol->style() != QwtSymbol::NoSymbol ) )
            {
                brush = QBrush( d_data->symbol->pen().color() );
            }
        }

        if ( brush.style() != Qt::NoBrush )
        {
            QRectF r( 0, 0, size.width(), size.height() );
            painter.fillRect( r, brush );
        }
    }

    if ( d_data->legendAttributes & QwtPlotCurve::LegendShowLine )
    {
        if ( pen() != Qt::NoPen )
        {
            QPen pn = pen();
            pn.setCapStyle( Qt::FlatCap );

            painter.setPen( pn );

            const double y = 0.5 * size.height();
            QwtPainter::drawLine( &painter, 0.0, y, size.width(), y );
        }
    }

    if ( d_data->legendAttributes & QwtPlotCurve::LegendShowSymbol )
    {
        if ( d_data->symbol )
        {
            QRectF r( 0, 0, size.width(), size.height() );
            d_data->symbol->drawSymbol( &painter, r );
        }
    }

    return graphic;
}

void ShaderLibrary::setUniformVariable(GLuint /*program*/, GLint location, QSizeF const& value)
{
   glUniform2f(location, value.width(), value.height());
}

QRectF CurveItem::Marker::boundingRect() const
{
    return QRectF(-markerSize.width() / 2, -markerSize.height() / 2, markerSize.width(), markerSize.height());
}

void QgsLayoutItemLegend::paint( QPainter *painter, const QStyleOptionGraphicsItem *itemStyle, QWidget *pWidget )
{
  if ( !painter )
    return;

  if ( mFilterAskedForUpdate )
  {
    mFilterAskedForUpdate = false;
    doUpdateFilterByMap();
  }

  int dpi = painter->device()->logicalDpiX();
  double dotsPerMM = dpi / 25.4;

  if ( mLayout )
  {
    mSettings.setUseAdvancedEffects( mLayout->renderContext().flags() & QgsLayoutRenderContext::FlagUseAdvancedEffects );
    mSettings.setDpi( dpi );
  }
  if ( mMap && mLayout )
  {
    mSettings.setMmPerMapUnit( mLayout->convertFromLayoutUnits( mMap->mapUnitsToLayoutUnits(), QgsUnitTypes::LayoutMillimeters ).length() );

    // use a temporary QgsMapSettings to find out real map scale
    QSizeF mapSizePixels = QSizeF( mMap->rect().width() * dotsPerMM, mMap->rect().height() * dotsPerMM );
    QgsRectangle mapExtent = mMap->extent();

    QgsMapSettings ms = mMap->mapSettings( mapExtent, mapSizePixels, dpi, false );
    mSettings.setMapScale( ms.scale() );
  }
  mInitialMapScaleCalculated = true;

  QgsLegendRenderer legendRenderer( mLegendModel.get(), mSettings );
  legendRenderer.setLegendSize( mForceResize && mSizeToContents ? QSize() : rect().size() );

  //adjust box if width or height is too small
  if ( mSizeToContents )
  {
    QSizeF size = legendRenderer.minimumSize();
    if ( mForceResize )
    {
      mForceResize = false;

      //set new rect, respecting position mode and data defined size/position
      QgsLayoutSize newSize = mLayout->convertFromLayoutUnits( size, sizeWithUnits().units() );
      attemptResize( newSize );
    }
    else if ( size.height() > rect().height() || size.width() > rect().width() )
    {
      //need to resize box
      QSizeF targetSize = rect().size();
      if ( size.height() > targetSize.height() )
        targetSize.setHeight( size.height() );
      if ( size.width() > targetSize.width() )
        targetSize.setWidth( size.width() );

      QgsLayoutSize newSize = mLayout->convertFromLayoutUnits( targetSize, sizeWithUnits().units() );
      //set new rect, respecting position mode and data defined size/position
      attemptResize( newSize );
    }
  }
  QgsLayoutItem::paint( painter, itemStyle, pWidget );
}

QVariant Property::convert(QVariant &value, QVariant::Type type) {

	QVariant::Type v_type = value.type(); /// current variant type
	QVariant c_value; /// converted value
	QSize size;
	QSizeF sizef;
	QRect rect;
	QRectF rectf;
	QString string;
	QStringList str_parts; /// Parts of string when parsing a string

	c_value = value;

	// Parse variant
	switch (v_type) {
		case QVariant::Size:
			size = value.toSize();
			switch (type) {
				case QVariant::String:
					c_value = QVariant(QString("%1,%2").arg(size.width()).arg(size.height()));
					break;
				default:
					break;
			}
			break;
		case QVariant::SizeF:
			sizef = value.toSizeF();
			switch (type) {
				case QVariant::String:
					c_value = QVariant(QString("%1,%2").arg(sizef.width()).arg(sizef.height()));
					break;
				default:
					break;
			}
			break;
		case QVariant::Rect:
			rect = value.toRect();
			switch (type) {
				case QVariant::String:
					c_value = QVariant(QString("%1,%2,%3,%4").arg(rect.x()).arg(rect.y()).arg(rect.width()).arg(rect.height()));
					break;
				default:
					break;
				}
			break;
		case QVariant::RectF:
			rectf = value.toRectF();
			switch (type) {
				case QVariant::String:
					c_value = QVariant(QString("%1,%2,%3,%4").arg(rectf.x()).arg(rectf.y()).arg(rectf.width()).arg(rectf.height()));
					break;
				default:
					break;
			}
			break;

		case QVariant::String:
			string = value.toString();
			str_parts = string.split(",");
			switch(type) {
				case QVariant::Rect:
					rect = QRect(str_parts[0].toInt(), str_parts[1].toInt(), str_parts[2].toInt(), str_parts[3].toInt());
					c_value = QVariant(rect);
					break;
				case QVariant::RectF:
					rectf = QRectF(str_parts[0].toFloat(), str_parts[1].toFloat(), str_parts[2].toFloat(), str_parts[3].toFloat());
					c_value = QVariant(rectf);
					break;
				case QVariant::Size:
					size = QSize(str_parts[0].toInt(), str_parts[1].toInt());
					c_value = QVariant(size);
					break;
				case QVariant::SizeF:
					sizef = QSizeF(str_parts[0].toFloat(), str_parts[1].toFloat());
					c_value = QVariant(sizef);
					break;
				default:
					break;
			}
			break;

		default: // No (known) need for processing
			break;
	}
	return c_value;
}

static void _q_boundGeometryToSizeConstraints(const QRectF &startGeometry,
                                              QRectF *rect, Qt::WindowFrameSection section,
                                              const QSizeF &min, const QSizeF &max,
                                              const QGraphicsWidget *widget)
{
    const QRectF proposedRect = *rect;
    qreal width = qBound(min.width(), proposedRect.width(), max.width());
    qreal height = qBound(min.height(), proposedRect.height(), max.height());

    QSizePolicy sp = widget->sizePolicy();
    if (const QGraphicsLayout *l = widget->layout()) {
        sp = l->sizePolicy();
    }
    const bool hasHFW = sp.hasHeightForWidth(); // || sp.hasWidthForHeight();

    const bool widthChanged = proposedRect.width() < widget->size().width();
    const bool heightChanged = proposedRect.height() < widget->size().height();

    if (hasHFW) {
        if (widthChanged || heightChanged) {
            const qreal minh = min.height();
            const qreal maxh = max.height();
            const qreal proposedHFW = minimumHeightForWidth(width, minh, maxh, widget);
            if (proposedHFW > proposedRect.height()) {
                QSizeF effectiveSize = closestAcceptableSize(QSizeF(width, height), widget);
                width = effectiveSize.width();
                height = effectiveSize.height();
            }
        }
    }

    switch (section) {
    case Qt::LeftSection:
        rect->setRect(startGeometry.right() - qRound(width), startGeometry.top(),
                      qRound(width), startGeometry.height());
        break;
    case Qt::TopLeftSection:
        rect->setRect(startGeometry.right() - qRound(width), startGeometry.bottom() - qRound(height),
                      qRound(width), qRound(height));
        break;
    case Qt::TopSection:
        rect->setRect(startGeometry.left(), startGeometry.bottom() - qRound(height),
                      startGeometry.width(), qRound(height));
        break;
    case Qt::TopRightSection:
        rect->setTop(rect->bottom() - qRound(height));
        rect->setWidth(qRound(width));
        break;
    case Qt::RightSection:
        rect->setWidth(qRound(width));
        break;
    case Qt::BottomRightSection:
        rect->setWidth(qRound(width));
        rect->setHeight(qRound(height));
        break;
    case Qt::BottomSection:
        rect->setHeight(qRound(height));
        break;
    case Qt::BottomLeftSection:
        rect->setRect(startGeometry.right() - qRound(width), startGeometry.top(),
                      qRound(width), qRound(height));
        break;
    default:
        break;
    }
}

static inline QSize qCeiling(const QSizeF &s)
{
    return QSize(qCeil(s.width()), qCeil(s.height()));
}