AnchorData Struct Reference

Represents an edge (anchor) in the internal graph. More...

#include <qgraphicsanchorlayout_p.h>

Inheritance diagram for AnchorData:

Public Types
enum	Dependency { Independent = 0, Master, Slave }
enum	Type { Normal = 0, Sequential, Parallel }

Public Functions
	AnchorData ()
void	dump (int indent=2)
void	refreshSizeHints (const QLayoutStyleInfo *styleInfo=0)
QString	toString () const
virtual void	updateChildrenSizes ()
virtual	~AnchorData ()
Public Functions inherited from QSimplexVariable
	QSimplexVariable ()

Public Variables
uint	dependency: 2
AnchorVertex *	from
QGraphicsAnchor *	graphicsAnchor
uint	isCenterAnchor: 1
uint	isLayoutAnchor: 1
QGraphicsLayoutItem *	item
qreal	maxPrefSize
qreal	maxSize
qreal	minPrefSize
qreal	minSize
QString	name
uint	orientation: 1
qreal	prefSize
qreal	sizeAtMaximum
qreal	sizeAtMinimum
qreal	sizeAtPreferred
AnchorVertex *	to
uint	type: 2
Public Variables inherited from QSimplexVariable
int	index
qreal	result

Detailed Description

Represents an edge (anchor) in the internal graph.

Warning

This function is not part of the public interface.

Definition at line 113 of file qgraphicsanchorlayout_p.h.

Enumerations

Dependency

enum AnchorData::Dependency

Enumerator
Independent
Master
Slave

Definition at line 120 of file qgraphicsanchorlayout_p.h.

                    {
        Independent = 0,
        Master,
        Slave
    };

Type

enum AnchorData::Type

Enumerator
Normal
Sequential
Parallel

Definition at line 114 of file qgraphicsanchorlayout_p.h.

              {
        Normal = 0,
        Sequential,
        Parallel
    };

Constructors and Destructors

AnchorData()

AnchorData::AnchorData ( )

inline

Definition at line 126 of file qgraphicsanchorlayout_p.h.

        : QSimplexVariable(), from(0), to(0),
          minSize(0), prefSize(0), maxSize(0),
          minPrefSize(0), maxPrefSize(0),
          sizeAtMinimum(0), sizeAtPreferred(0),
          sizeAtMaximum(0), item(0), graphicsAnchor(0),
          type(Normal), isLayoutAnchor(false),
          isCenterAnchor(false), orientation(0),
          dependency(Independent) {}

~AnchorData()

AnchorData::~AnchorData ( )

virtual

Definition at line 166 of file qgraphicsanchorlayout_p.cpp.

{
    if (graphicsAnchor) {
        // Remove reference to ourself to avoid double removal in
        // QGraphicsAnchorPrivate dtor.
        graphicsAnchor->d_func()->data = 0;

        delete graphicsAnchor;
    }
}

Functions

dump()

void AnchorData::dump

(

int

indent = 2

)

Definition at line 562 of file qgraphicsanchorlayout_p.cpp.

Referenced by dump().

                                {
    if (type == Parallel) {
        qDebug("%*s type: parallel:", indent, "");
        ParallelAnchorData *p = static_cast<ParallelAnchorData *>(this);
        p->firstEdge->dump(indent+2);
        p->secondEdge->dump(indent+2);
    } else if (type == Sequential) {
        SequentialAnchorData *s = static_cast<SequentialAnchorData *>(this);
        int kids = s->m_edges.count();
        qDebug("%*s type: sequential(%d):", indent, "", kids);
        for (int i = 0; i < kids; ++i) {
            s->m_edges.at(i)->dump(indent+2);
        }
    } else {
        qDebug("%*s type: Normal:", indent, "");
    }
}

refreshSizeHints()

void AnchorData::refreshSizeHints

(

const QLayoutStyleInfo *

styleInfo = 0

)

Definition at line 178 of file qgraphicsanchorlayout_p.cpp.

Referenced by QGraphicsAnchorLayoutPrivate::createCenterAnchors(), QGraphicsAnchorLayoutPrivate::createItemEdges(), QGraphicsAnchorLayoutPrivate::refreshAllSizeHints(), and QGraphicsAnchorLayoutPrivate::removeCenterAnchors().

{
    QSizePolicy::Policy policy;
    qreal minSizeHint;
    qreal prefSizeHint;
    qreal maxSizeHint;

    if (item) {
        // It is an internal anchor, fetch size information from the item
        if (isLayoutAnchor) {
            minSize = 0;
            prefSize = 0;
            maxSize = QWIDGETSIZE_MAX;
            if (isCenterAnchor)
                maxSize /= 2;

            minPrefSize = prefSize;
            maxPrefSize = maxSize;
            return;
        } else {
            if (orientation == QGraphicsAnchorLayoutPrivate::Horizontal) {
                policy = item->sizePolicy().horizontalPolicy();
                minSizeHint = item->effectiveSizeHint(Qt::MinimumSize).width();
                prefSizeHint = item->effectiveSizeHint(Qt::PreferredSize).width();
                maxSizeHint = item->effectiveSizeHint(Qt::MaximumSize).width();
            } else {
                policy = item->sizePolicy().verticalPolicy();
                minSizeHint = item->effectiveSizeHint(Qt::MinimumSize).height();
                prefSizeHint = item->effectiveSizeHint(Qt::PreferredSize).height();
                maxSizeHint = item->effectiveSizeHint(Qt::MaximumSize).height();
            }

            if (isCenterAnchor) {
                minSizeHint /= 2;
                prefSizeHint /= 2;
                maxSizeHint /= 2;
            }
        }
    } else {
        // It is a user-created anchor, fetch size information from the associated QGraphicsAnchor
        Q_ASSERT(graphicsAnchor);
        QGraphicsAnchorPrivate *anchorPrivate = graphicsAnchor->d_func();

        // Policy, min and max sizes are straightforward
        policy = anchorPrivate->sizePolicy;
        minSizeHint = 0;
        maxSizeHint = QWIDGETSIZE_MAX;

        // Preferred Size
        if (anchorPrivate->hasSize) {
            // Anchor has user-defined size
            prefSizeHint = anchorPrivate->preferredSize;
        } else {
            // Fetch size information from style
            const Qt::Orientation orient = Qt::Orientation(QGraphicsAnchorLayoutPrivate::edgeOrientation(from->m_edge) + 1);
            qreal s = styleInfo->defaultSpacing(orient);
            if (s < 0) {
                QSizePolicy::ControlType controlTypeFrom = from->m_item->sizePolicy().controlType();
                QSizePolicy::ControlType controlTypeTo = to->m_item->sizePolicy().controlType();
                s = styleInfo->perItemSpacing(controlTypeFrom, controlTypeTo, orient);

                // ### Currently we do not support negative anchors inside the graph.
                // To avoid those being created by a negative style spacing, we must
                // make this test.
                if (s < 0)
                    s = 0;
            }
            prefSizeHint = s;
        }
    }

    // Fill minSize, prefSize and maxSize based on policy and sizeHints
    applySizePolicy(policy, minSizeHint, prefSizeHint, maxSizeHint,
                    &minSize, &prefSize, &maxSize);

    minPrefSize = prefSize;
    maxPrefSize = maxSize;

    // Set the anchor effective sizes to preferred.
    //
    // Note: The idea here is that all items should remain at their
    // preferred size unless where that's impossible.  In cases where
    // the item is subject to restrictions (anchored to the layout
    // edges, for instance), the simplex solver will be run to
    // recalculate and override the values we set here.
    sizeAtMinimum = prefSize;
    sizeAtPreferred = prefSize;
    sizeAtMaximum = prefSize;
}

toString()

QString AnchorData::toString ( ) const

inline

Definition at line 185 of file qgraphicsanchorlayout_p.h.

Referenced by ParallelAnchorData::ParallelAnchorData(), and GraphPath::toString().

{
    return QString::fromAscii("Anchor(%1)").arg(name);
}

updateChildrenSizes()

virtual void AnchorData::updateChildrenSizes ( )

inlinevirtual

Reimplemented in ParallelAnchorData, and SequentialAnchorData.

Definition at line 137 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::updateAnchorSizes(), and SequentialAnchorData::updateChildrenSizes().

{}

Properties

dependency

uint AnchorData::dependency

Definition at line 181 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::constraintsFromSizeHints(), and QGraphicsAnchorLayoutPrivate::createCenterAnchors().

from

AnchorVertex* AnchorData::from

Definition at line 147 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchor_helper(), QGraphicsAnchorLayoutPrivate::addAnchorMaybeParallel(), SequentialAnchorData::calculateSizeHints(), createSequence(), QGraphicsAnchorLayoutPrivate::findPaths(), QGraphicsAnchorLayoutPrivate::interpolateEdge(), ParallelAnchorData::ParallelAnchorData(), QGraphicsAnchorLayoutPrivate::replaceVertex(), replaceVertex_helper(), QGraphicsAnchorLayoutPrivate::restoreSimplifiedAnchor(), QGraphicsAnchorLayoutPrivate::restoreVertices(), SequentialAnchorData::updateChildrenSizes(), and QGraphicsAnchorPrivate::~QGraphicsAnchorPrivate().

graphicsAnchor

QGraphicsAnchor* AnchorData::graphicsAnchor

Definition at line 175 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::acquireGraphicsAnchor(), QGraphicsAnchorLayoutPrivate::getAnchor(), and QGraphicsAnchorPrivate::~QGraphicsAnchorPrivate().

isCenterAnchor

uint AnchorData::isCenterAnchor

Definition at line 179 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchorMaybeParallel(), QGraphicsAnchorLayoutPrivate::createCenterAnchors(), QGraphicsAnchorLayoutPrivate::restoreSimplifiedConstraints(), and QGraphicsAnchorLayoutPrivate::simplifyGraphIteration().

isLayoutAnchor

uint AnchorData::isLayoutAnchor

Definition at line 178 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchor_helper(), and QGraphicsAnchorLayoutPrivate::solvePreferred().

item

QGraphicsLayoutItem* AnchorData::item

Definition at line 174 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchor_helper(), and QGraphicsAnchorLayoutPrivate::identifyNonFloatItems_helper().

maxPrefSize

qreal AnchorData::maxPrefSize

Definition at line 161 of file qgraphicsanchorlayout_p.h.

Referenced by SequentialAnchorData::calculateSizeHints(), QGraphicsAnchorLayoutPrivate::solvePreferred(), and SequentialAnchorData::updateChildrenSizes().

maxSize

qreal AnchorData::maxSize

Definition at line 158 of file qgraphicsanchorlayout_p.h.

Referenced by SequentialAnchorData::calculateSizeHints(), QGraphicsAnchorLayoutPrivate::constraintsFromSizeHints(), QGraphicsAnchorLayoutPrivate::createLayoutEdges(), QGraphicsAnchorLayoutPrivate::simplifyVertices(), QGraphicsAnchorLayoutPrivate::solvePreferred(), and SequentialAnchorData::updateChildrenSizes().

minPrefSize

qreal AnchorData::minPrefSize

Definition at line 160 of file qgraphicsanchorlayout_p.h.

Referenced by SequentialAnchorData::calculateSizeHints(), QGraphicsAnchorLayoutPrivate::solvePreferred(), and SequentialAnchorData::updateChildrenSizes().

minSize

qreal AnchorData::minSize

Definition at line 156 of file qgraphicsanchorlayout_p.h.

Referenced by SequentialAnchorData::calculateSizeHints(), QGraphicsAnchorLayoutPrivate::constraintsFromSizeHints(), QGraphicsAnchorLayoutPrivate::simplifyVertices(), QGraphicsAnchorLayoutPrivate::solvePreferred(), and SequentialAnchorData::updateChildrenSizes().

name

QString AnchorData::name

Definition at line 143 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchor_helper(), and QGraphicsAnchorLayoutPrivate::replaceVertex().

orientation

uint AnchorData::orientation

Definition at line 180 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchor_helper(), QGraphicsAnchorLayoutPrivate::addAnchorMaybeParallel(), QGraphicsAnchorLayoutPrivate::constraintsFromSizeHints(), QGraphicsAnchorLayoutPrivate::interpolateEdge(), ParallelAnchorData::ParallelAnchorData(), and QGraphicsAnchorLayoutPrivate::restoreSimplifiedAnchor().

prefSize

qreal AnchorData::prefSize

Definition at line 157 of file qgraphicsanchorlayout_p.h.

Referenced by SequentialAnchorData::calculateSizeHints(), QGraphicsAnchorLayoutPrivate::solvePreferred(), and SequentialAnchorData::updateChildrenSizes().

sizeAtMaximum

qreal AnchorData::sizeAtMaximum

Definition at line 169 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::calculateNonTrunk(), QGraphicsAnchorLayoutPrivate::interpolateEdge(), QGraphicsAnchorLayoutPrivate::solveMinMax(), and SequentialAnchorData::updateChildrenSizes().

sizeAtMinimum

qreal AnchorData::sizeAtMinimum

Definition at line 167 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::calculateNonTrunk(), QGraphicsAnchorLayoutPrivate::interpolateEdge(), QGraphicsAnchorLayoutPrivate::solveMinMax(), and SequentialAnchorData::updateChildrenSizes().

sizeAtPreferred

qreal AnchorData::sizeAtPreferred

Definition at line 168 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::calculateNonTrunk(), QGraphicsAnchorLayoutPrivate::calculateTrunk(), QGraphicsAnchorLayoutPrivate::interpolateEdge(), QGraphicsAnchorLayoutPrivate::solvePreferred(), and SequentialAnchorData::updateChildrenSizes().

to

AnchorVertex* AnchorData::to

Definition at line 148 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::addAnchor_helper(), QGraphicsAnchorLayoutPrivate::addAnchorMaybeParallel(), SequentialAnchorData::calculateSizeHints(), createSequence(), QGraphicsAnchorLayoutPrivate::interpolateEdge(), ParallelAnchorData::ParallelAnchorData(), QGraphicsAnchorLayoutPrivate::replaceVertex(), replaceVertex_helper(), QGraphicsAnchorLayoutPrivate::restoreSimplifiedAnchor(), QGraphicsAnchorLayoutPrivate::restoreVertices(), SequentialAnchorData::updateChildrenSizes(), and QGraphicsAnchorPrivate::~QGraphicsAnchorPrivate().

type

uint AnchorData::type

Definition at line 177 of file qgraphicsanchorlayout_p.h.

Referenced by QGraphicsAnchorLayoutPrivate::identifyNonFloatItems_helper(), QGraphicsAnchorLayoutPrivate::restoreSimplifiedAnchor(), and QGraphicsAnchorLayoutPrivate::restoreSimplifiedGraph().

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

• /src/gui/graphicsview/qgraphicsanchorlayout_p.h
• /src/gui/graphicsview/qgraphicsanchorlayout_p.cpp