PolygonView Class Reference

Description

This is a View of polygon mask (represented by PolygonItem) on GraphicsScene.

Definition at line 26 of file PolygonView.h.

Inheritance diagram for PolygonView:

Collaboration diagram for PolygonView:

Public Slots
bool	closePolygonIfNecessary ()
	Returns true if there was a request to close polygon (emitted by its start point), and then closes a polygon. Returns true if polygon was closed. More...
void	onClosePolygonRequest (bool value)

Public Member Functions
	PolygonView (PolygonItem *item)
	~PolygonView () override
void	addView (IShape2DView *childView, int row) override
QRectF	boundingRect () const override
bool	isClosedPolygon ()
QPointF	lastAddedPoint () const
	Returns last added poligon point in scene coordinates. More...
SessionItem *	parameterizedItem () const override
void	setSceneAdaptor (const ISceneAdaptor *adaptor)
QPainterPath	shape () const override
int	type () const override

Protected Slots
virtual void	onChangedX ()
virtual void	onChangedY ()
virtual void	onPropertyChange ()
void	update_view () override

Protected Member Functions
bool	blockOnProperty () const
void	disconnectFromItem (SessionItem *item)
qreal	fromSceneX (qreal value) const
	convert scene coordinates to ColorMap plot coordinates More...
qreal	fromSceneY (qreal value) const
QVariant	itemChange (GraphicsItemChange change, const QVariant &value) override
QPainterPath	maskedShape () const
	Returns the shape with all masking already applied. More...
void	mouseMoveEvent (QGraphicsSceneMouseEvent *event) override
void	paint (QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override
void	setBlockOnProperty (bool value)
qreal	toSceneX (qreal value) const
qreal	toSceneY (qreal value) const

Protected Attributes
const ISceneAdaptor *	m_adaptor
bool	m_block_on_property_change
QRectF	m_bounding_rect

Private Member Functions
bool	makePolygonClosed ()
void	onItemDestroyed () override
void	onItemPropertyChange (const QString &propertyName)
void	setChildrenVisible (bool value)
void	update_points ()
	When polygon moves as a whole thing across the scene, given method updates coordinates of PolygonPointItem's. More...
void	update_polygon ()
	Runs through all PolygonPointItem and calculate bounding rectangle. Determines position of the rectangle in scene. Calculates position of PolygonPointView in local polygon coordinates. More...

Private Attributes
bool	m_block_on_point_update
bool	m_close_polygon_request
PolygonItem *	m_item
QPolygonF	m_polygon

Constructor & Destructor Documentation

PolygonView()

PolygonView::PolygonView ( PolygonItem *  item )

explicit

Definition at line 26 of file PolygonView.cpp.

    : IShape2DView(item)
    , m_item(item)
    , m_block_on_point_update(false)
    , m_close_polygon_request(false)
{
    setFlag(QGraphicsItem::ItemIsSelectable);
    setFlag(QGraphicsItem::ItemIsMovable);
    setFlag(QGraphicsItem::ItemSendsGeometryChanges);
}

~PolygonView()

PolygonView::~PolygonView ( )

override

Definition at line 37 of file PolygonView.cpp.

{
    disconnectFromItem(m_item);
}

References IShape2DView::disconnectFromItem(), and m_item.

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Member Function Documentation

addView()

void PolygonView::addView ( IShape2DView *  childView, int  row  )

overridevirtual

Reimplemented from IShape2DView.

Definition at line 47 of file PolygonView.cpp.

{
    Q_UNUSED(row);
 
    if (childItems().contains(childView))
        return;
 
    auto* pointView = dynamic_cast<PolygonPointView*>(childView);
    ASSERT(pointView);
    pointView->setParentItem(this);
 
    // polygon consisting from more than 2 points can be closed via hover event by clicking
    // on first polygon point
    if (!isClosedPolygon() && childItems().size() > 2)
        childItems()[0]->setAcceptHoverEvents(true);
 
    pointView->setVisible(true);
    update_polygon();
 
    connect(pointView, &PolygonPointView::propertyChanged, this, &PolygonView::update_view);
    connect(pointView, &PolygonPointView::closePolygonRequest, this,
            &PolygonView::onClosePolygonRequest);
}

References PolygonPointView::closePolygonRequest(), isClosedPolygon(), onClosePolygonRequest(), PolygonPointView::propertyChanged(), update_polygon(), and update_view().

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blockOnProperty()

bool IShape2DView::blockOnProperty ( ) const

protectedinherited

Definition at line 140 of file IShape2DView.cpp.

{
    return m_block_on_property_change;
}

References IShape2DView::m_block_on_property_change.

boundingRect()

QRectF IShape2DView::boundingRect ( ) const

overrideinherited

Definition at line 50 of file IShape2DView.cpp.

{
    return m_bounding_rect;
}

References IShape2DView::m_bounding_rect.

closePolygonIfNecessary

bool PolygonView::closePolygonIfNecessary ( )

slot

Returns true if there was a request to close polygon (emitted by its start point), and then closes a polygon. Returns true if polygon was closed.

Definition at line 87 of file PolygonView.cpp.

{
    if (m_close_polygon_request) {
        for (QGraphicsItem* childItem : childItems()) {
            childItem->setFlag(QGraphicsItem::ItemIsMovable);
            childItem->setFlag(QGraphicsItem::ItemSendsGeometryChanges);
            childItem->setAcceptHoverEvents(false);
            childItem->setCursor(Qt::SizeAllCursor);
        }
        m_item->setIsClosed(true);
        update();
    }
    return isClosedPolygon();
}

References isClosedPolygon(), m_close_polygon_request, m_item, and PolygonItem::setIsClosed().

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disconnectFromItem()

void IShape2DView::disconnectFromItem ( SessionItem *  item )

protectedinherited

Definition at line 145 of file IShape2DView.cpp.

{
    if (item)
        item->mapper()->unsubscribe(this);
}

References SessionItem::mapper(), and ModelMapper::unsubscribe().

Referenced by EllipseView::~EllipseView(), HorizontalLineView::~HorizontalLineView(), MaskAllView::~MaskAllView(), MaskContainerView::~MaskContainerView(), PolygonPointView::~PolygonPointView(), ~PolygonView(), RectangleView::~RectangleView(), and VerticalLineView::~VerticalLineView().

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fromSceneX()

qreal IShape2DView::fromSceneX ( qreal  value ) const

protectedinherited

convert scene coordinates to ColorMap plot coordinates

Definition at line 119 of file IShape2DView.cpp.

{
    return m_adaptor ? m_adaptor->fromSceneX(value) : value;
}

References ISceneAdaptor::fromSceneX(), and IShape2DView::m_adaptor.

Referenced by EllipseView::mouseMoveEvent(), RectangleView::mouseMoveEvent(), EllipseView::onChangedX(), VerticalLineView::onChangedX(), RectangleView::onChangedX(), and PolygonPointView::updateParameterizedItem().

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fromSceneY()

qreal IShape2DView::fromSceneY ( qreal  value ) const

protectedinherited

Definition at line 124 of file IShape2DView.cpp.

{
    return m_adaptor ? m_adaptor->fromSceneY(value) : value;
}

References ISceneAdaptor::fromSceneY(), and IShape2DView::m_adaptor.

Referenced by EllipseView::mouseMoveEvent(), RectangleView::mouseMoveEvent(), EllipseView::onChangedY(), HorizontalLineView::onChangedY(), RectangleView::onChangedY(), and PolygonPointView::updateParameterizedItem().

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isClosedPolygon()

bool PolygonView::isClosedPolygon

(

)

Definition at line 107 of file PolygonView.cpp.

{
    return m_item->isClosed();
}

References PolygonItem::isClosed(), and m_item.

Referenced by addView(), closePolygonIfNecessary(), and paint().

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itemChange()

QVariant PolygonView::itemChange ( GraphicsItemChange  change, const QVariant &  value  )

overrideprotected

Definition at line 125 of file PolygonView.cpp.

{
    if (change == QGraphicsItem::ItemSelectedHasChanged)
        setChildrenVisible(this->isSelected());
 
    return value;
}

References setChildrenVisible().

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lastAddedPoint()

QPointF PolygonView::lastAddedPoint

(

)

const

Returns last added poligon point in scene coordinates.

Definition at line 72 of file PolygonView.cpp.

{
    return !childItems().empty() ? childItems().back()->scenePos() : QPointF();
}

makePolygonClosed()

bool PolygonView::makePolygonClosed ( )

private

maskedShape()

QPainterPath IShape2DView::maskedShape ( ) const

protectedinherited

Returns the shape with all masking already applied.

Definition at line 79 of file IShape2DView.cpp.

{
    static const QSet<MaskEditorHelper::EViewTypes> relevantMaskTypes = {
        MaskEditorHelper::RECTANGLE, MaskEditorHelper::POLYGON, MaskEditorHelper::VERTICALLINE,
        MaskEditorHelper::HORIZONTALLINE, MaskEditorHelper::ELLIPSE};
 
    QPainterPath resultingShape = mapToScene(shape());
    for (auto* item : scene()->items()) {
        auto* const maskItem = dynamic_cast<IShape2DView*>(item);
        if (!maskItem
            || !relevantMaskTypes.contains((MaskEditorHelper::EViewTypes)maskItem->type()))
            continue;
 
        const bool isMaskingItem = itemMaskValue(maskItem->parameterizedItem());
        const bool isOnTop = maskItem->zValue() > zValue();
        if (isMaskingItem || !isOnTop)
            continue;
 
        const auto maskItemShape = maskItem->mapToScene(maskItem->shape());
        if (!maskItemShape.intersects(resultingShape))
            continue;
 
        // Item lays on top and is non-masking -> subtract the
        // path of the item
        resultingShape = resultingShape.subtracted(maskItemShape);
    }
 
    return mapFromScene(resultingShape);
}

References MaskEditorHelper::ELLIPSE, MaskEditorHelper::HORIZONTALLINE, MaskEditorHelper::POLYGON, MaskEditorHelper::RECTANGLE, and MaskEditorHelper::VERTICALLINE.

Referenced by IShape2DView::paint().

mouseMoveEvent()

void PolygonView::mouseMoveEvent ( QGraphicsSceneMouseEvent *  event )

overrideprotected

Definition at line 133 of file PolygonView.cpp.

{
    IShape2DView::mouseMoveEvent(event);
    update_points();
}

References update_points().

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onChangedX

virtual void IShape2DView::onChangedX ( )

inlineprotectedvirtualslotinherited

Definition at line 44 of file IShape2DView.h.

{}

Referenced by IShape2DView::IShape2DView().

onChangedY

virtual void IShape2DView::onChangedY ( )

inlineprotectedvirtualslotinherited

Definition at line 45 of file IShape2DView.h.

{}

Referenced by IShape2DView::IShape2DView().

onClosePolygonRequest

void PolygonView::onClosePolygonRequest ( bool  value )

slot

Definition at line 102 of file PolygonView.cpp.

{
    m_close_polygon_request = value;
}

References m_close_polygon_request.

Referenced by addView().

onItemDestroyed()

void PolygonView::onItemDestroyed ( )

overrideprivatevirtual

Implements IShape2DView.

Definition at line 202 of file PolygonView.cpp.

{
    m_item = nullptr;
}

References m_item.

onItemPropertyChange()

void IShape2DView::onItemPropertyChange ( const QString &  propertyName )

privateinherited

Definition at line 151 of file IShape2DView.cpp.

{
    if (m_block_on_property_change)
        return;
 
    m_block_on_property_change = true;
 
    bool schedule_update = false;
    if (MaskItem::isMaskValuePropertyName(propertyName))
        schedule_update = true;
    else if (MaskItem::isIsVisiblePropertyName(propertyName)) {
        bool visible = false;
        if (auto* maskItem = dynamic_cast<MaskItem*>(parameterizedItem()))
            visible = maskItem->isVisibleValue();
        this->setVisible(visible);
        schedule_update = true;
    }
 
    onPropertyChange();
 
    if (schedule_update)
        update();
 
    m_block_on_property_change = false;
}

References MaskItem::isIsVisiblePropertyName(), MaskItem::isMaskValuePropertyName(), IShape2DView::m_block_on_property_change, IShape2DView::onPropertyChange(), and IShape2DView::parameterizedItem().

Referenced by IShape2DView::IShape2DView().

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onPropertyChange

virtual void IShape2DView::onPropertyChange ( )

inlineprotectedvirtualslotinherited

Definition at line 46 of file IShape2DView.h.

{}

Referenced by IShape2DView::onItemPropertyChange().

paint()

void PolygonView::paint ( QPainter *  painter, const QStyleOptionGraphicsItem *  o, QWidget *  w  )

overrideprotected

Definition at line 112 of file PolygonView.cpp.

{
    if (isClosedPolygon())
        IShape2DView::paint(painter, o, w);
    else {
        ASSERT(m_item);
        const bool mask_value = static_cast<PolygonItem*>(m_item)->maskValue();
        painter->setRenderHints(QPainter::Antialiasing);
        painter->setPen(MaskEditorHelper::getMaskPen(mask_value));
        painter->drawPolyline(m_polygon.toPolygon());
    }
}

References MaskEditorHelper::getMaskPen(), isClosedPolygon(), m_item, m_polygon, and IShape2DView::paint().

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parameterizedItem()

SessionItem * PolygonView::parameterizedItem ( ) const

overridevirtual

Implements IShape2DView.

Definition at line 42 of file PolygonView.cpp.

{
    return m_item;
}

References m_item.

setBlockOnProperty()

void IShape2DView::setBlockOnProperty ( bool  value )

protectedinherited

Definition at line 135 of file IShape2DView.cpp.

{
    m_block_on_property_change = value;
}

References IShape2DView::m_block_on_property_change.

Referenced by EllipseView::onChangedX(), VerticalLineView::onChangedX(), RectangleView::onChangedX(), EllipseView::onChangedY(), HorizontalLineView::onChangedY(), and RectangleView::onChangedY().

setChildrenVisible()

void PolygonView::setChildrenVisible ( bool  value )

private

Definition at line 196 of file PolygonView.cpp.

{
    for (QGraphicsItem* childItem : childItems())
        childItem->setVisible(value);
}

Referenced by itemChange().

setSceneAdaptor()

void IShape2DView::setSceneAdaptor ( const ISceneAdaptor *  adaptor )

inherited

Definition at line 55 of file IShape2DView.cpp.

{
    ASSERT(adaptor);
 
    if (m_adaptor != adaptor) {
        if (m_adaptor)
            disconnect(m_adaptor, &ISceneAdaptor::update_request, this, &IShape2DView::update_view);
 
        m_adaptor = adaptor;
        connect(m_adaptor, &ISceneAdaptor::update_request, this, &IShape2DView::update_view,
                Qt::UniqueConnection);
        update_view();
    }
}

References IShape2DView::m_adaptor, ISceneAdaptor::update_request(), and IShape2DView::update_view().

Referenced by MaskViewFactory::createMaskView().

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shape()

QPainterPath PolygonView::shape ( ) const

override

Definition at line 77 of file PolygonView.cpp.

{
    QPainterPath path;
    path.addPolygon(m_polygon);
    path.closeSubpath();
    return path;
}

References m_polygon.

toSceneX()

qreal IShape2DView::toSceneX ( qreal  value ) const

protectedinherited

Definition at line 109 of file IShape2DView.cpp.

{
    return m_adaptor ? m_adaptor->toSceneX(value) : value;
}

References IShape2DView::m_adaptor, and ISceneAdaptor::toSceneX().

Referenced by EllipseView::left(), RectangleView::left(), EllipseView::onPropertyChange(), VerticalLineView::onPropertyChange(), EllipseView::right(), RectangleView::right(), update_polygon(), EllipseView::update_position(), RectangleView::update_position(), and VerticalLineView::update_view().

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toSceneY()

qreal IShape2DView::toSceneY ( qreal  value ) const

protectedinherited

Definition at line 114 of file IShape2DView.cpp.

{
    return m_adaptor ? m_adaptor->toSceneY(value) : value;
}

References IShape2DView::m_adaptor, and ISceneAdaptor::toSceneY().

Referenced by EllipseView::bottom(), RectangleView::bottom(), EllipseView::onPropertyChange(), HorizontalLineView::onPropertyChange(), EllipseView::top(), RectangleView::top(), update_polygon(), EllipseView::update_position(), RectangleView::update_position(), and HorizontalLineView::update_view().

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type()

int PolygonView::type ( ) const

inlineoverride

Definition at line 30 of file PolygonView.h.

{ return MaskEditorHelper::POLYGON; }

References MaskEditorHelper::POLYGON.

update_points()

void PolygonView::update_points ( )

private

When polygon moves as a whole thing across the scene, given method updates coordinates of PolygonPointItem's.

Definition at line 182 of file PolygonView.cpp.

{
    if (m_block_on_point_update)
        return;
 
    for (QGraphicsItem* childItem : childItems()) {
        auto* view = dynamic_cast<PolygonPointView*>(childItem);
        QPointF pos = view->scenePos();
        disconnect(view, &PolygonPointView::propertyChanged, this, &PolygonView::update_view);
        view->updateParameterizedItem(pos);
        connect(view, &PolygonPointView::propertyChanged, this, &PolygonView::update_view);
    }
}

References m_block_on_point_update, PolygonPointView::propertyChanged(), and update_view().

Referenced by mouseMoveEvent().

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update_polygon()

void PolygonView::update_polygon ( )

private

Runs through all PolygonPointItem and calculate bounding rectangle. Determines position of the rectangle in scene. Calculates position of PolygonPointView in local polygon coordinates.

Definition at line 148 of file PolygonView.cpp.

{
    if (m_block_on_point_update)
        return;
 
    m_block_on_point_update = true;
 
    if (!m_item->points().isEmpty()) {
        m_polygon.clear();
 
        for (auto* point : m_item->points())
            m_polygon << QPointF(toSceneX(point->posX()), toSceneY(point->posY()));
 
        const QRectF scene_rect = m_polygon.boundingRect().marginsAdded(
            QMarginsF(bbox_margins, bbox_margins, bbox_margins, bbox_margins));
 
        m_bounding_rect = QRectF(0.0, 0.0, scene_rect.width(), scene_rect.height());
 
        setPos(scene_rect.x(), scene_rect.y());
        update(); // to propagate changes to scene
 
        m_polygon = mapFromScene(m_polygon);
 
        int index(0);
        for (auto* childView : childItems())
            childView->setPos(m_polygon[index++]);
 
        setPos(scene_rect.x(), scene_rect.y());
    }
    m_block_on_point_update = false;
}

References m_block_on_point_update, IShape2DView::m_bounding_rect, m_item, m_polygon, PolygonItem::points(), IShape2DView::toSceneX(), and IShape2DView::toSceneY().

Referenced by addView(), and update_view().

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update_view

void PolygonView::update_view ( )

overrideprotectedslot

Definition at line 139 of file PolygonView.cpp.

{
    update_polygon();
    update();
}

References update_polygon().

Referenced by addView(), and update_points().

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Member Data Documentation

m_adaptor

const ISceneAdaptor* IShape2DView::m_adaptor

protectedinherited

Definition at line 67 of file IShape2DView.h.

Referenced by RegionOfInterestView::boundingRect(), IShape2DView::fromSceneX(), IShape2DView::fromSceneY(), IShape2DView::setSceneAdaptor(), IShape2DView::toSceneX(), IShape2DView::toSceneY(), VerticalLineView::update_view(), HorizontalLineView::update_view(), MaskAllView::update_view(), MaskContainerView::update_view(), and RegionOfInterestView::update_view().

m_block_on_point_update

bool PolygonView::m_block_on_point_update

private

Definition at line 64 of file PolygonView.h.

Referenced by update_points(), and update_polygon().

m_block_on_property_change

bool IShape2DView::m_block_on_property_change

protectedinherited

Definition at line 69 of file IShape2DView.h.

Referenced by IShape2DView::blockOnProperty(), IShape2DView::onItemPropertyChange(), and IShape2DView::setBlockOnProperty().

m_bounding_rect

QRectF IShape2DView::m_bounding_rect

protectedinherited

Definition at line 68 of file IShape2DView.h.

Referenced by IShape2DView::boundingRect(), VerticalLineView::paint(), HorizontalLineView::paint(), MaskAllView::paint(), VerticalLineView::shape(), HorizontalLineView::shape(), RectangleBaseView::update_bounding_rect(), update_polygon(), VerticalLineView::update_view(), HorizontalLineView::update_view(), MaskAllView::update_view(), MaskContainerView::update_view(), and RegionOfInterestView::update_view().

m_close_polygon_request

bool PolygonView::m_close_polygon_request

private

Definition at line 65 of file PolygonView.h.

Referenced by closePolygonIfNecessary(), and onClosePolygonRequest().

m_item

PolygonItem* PolygonView::m_item

private

Definition at line 62 of file PolygonView.h.

Referenced by ~PolygonView(), closePolygonIfNecessary(), isClosedPolygon(), onItemDestroyed(), paint(), parameterizedItem(), and update_polygon().

m_polygon

QPolygonF PolygonView::m_polygon

private

Definition at line 63 of file PolygonView.h.

Referenced by paint(), shape(), and update_polygon().

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The documentation for this class was generated from the following files:

• /home/build/builds/o5h8MZZm/0/mlz/bornagain/GUI/View/Mask/PolygonView.h
• /home/build/builds/o5h8MZZm/0/mlz/bornagain/GUI/View/Mask/PolygonView.cpp