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// Copyright (C) 2016 Jochen Becher
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "associationitem.h"
#include "qmt/diagram_controller/diagramcontroller.h"
#include "qmt/diagram/dassociation.h"
#include "qmt/diagram_scene/capabilities/intersectionable.h"
#include "qmt/diagram_scene/diagramscenemodel.h"
#include "qmt/diagram_scene/parts/arrowitem.h"
#include "qmt/infrastructure/geometryutilities.h"
#include "qmt/infrastructure/qmtassert.h"
#include "qmt/style/style.h"
#include <QGraphicsScene>
#include <QFont>
#include <QPen>
#include <QBrush>
#include <QVector2D>
#include <QPair>
namespace qmt {
AssociationItem::AssociationItem(DAssociation *association, DiagramSceneModel *diagramSceneModel, QGraphicsItem *parent)
: RelationItem(association, diagramSceneModel, parent),
m_association(association)
{
}
AssociationItem::~AssociationItem()
{
}
void AssociationItem::update(const Style *style)
{
RelationItem::update(style);
updateEndLabels(m_association->endA(), m_association->endB(), &m_endAName, &m_endACardinality, style);
updateEndLabels(m_association->endB(), m_association->endA(), &m_endBName, &m_endBCardinality, style);
QMT_ASSERT(m_arrow, return);
QGraphicsItem *endAItem = m_diagramSceneModel->graphicsItem(m_association->endAUid());
if (!endAItem)
return;
placeEndLabels(m_arrow->firstLineSegment(), m_endAName, m_endACardinality, endAItem, m_arrow->startHeadLength());
QGraphicsItem *endBItem = m_diagramSceneModel->graphicsItem(m_association->endBUid());
if (!endBItem)
return;
placeEndLabels(m_arrow->lastLineSegment(), m_endBName, m_endBCardinality, endBItem, m_arrow->endHeadLength());
}
void AssociationItem::updateEndLabels(const DAssociationEnd &end, const DAssociationEnd &otherEnd,
QGraphicsSimpleTextItem **endName, QGraphicsSimpleTextItem **endCardinality,
const Style *style)
{
Q_UNUSED(end)
if (!otherEnd.name().isEmpty()) {
if (!*endName)
*endName = new QGraphicsSimpleTextItem(this);
(*endName)->setFont(style->smallFont());
(*endName)->setBrush(style->textBrush());
(*endName)->setText(otherEnd.name());
} else if (*endName) {
(*endName)->scene()->removeItem(*endName);
delete *endName;
*endName = nullptr;
}
if (!otherEnd.cardinality().isEmpty()) {
if (!*endCardinality)
*endCardinality = new QGraphicsSimpleTextItem(this);
(*endCardinality)->setFont(style->smallFont());
(*endCardinality)->setBrush(style->textBrush());
(*endCardinality)->setText(otherEnd.cardinality());
} else if (*endCardinality) {
(*endCardinality)->scene()->removeItem(*endCardinality);
delete *endCardinality;
*endCardinality = nullptr;
}
}
void AssociationItem::placeEndLabels(const QLineF &lineSegment, QGraphicsItem *endName, QGraphicsItem *endCardinality,
QGraphicsItem *endItem, double headLength)
{
const double HEAD_OFFSET = headLength + 6.0;
const double SIDE_OFFSET = 4.0;
QPointF headOffset = QPointF(HEAD_OFFSET, 0);
QPointF sideOffset = QPointF(0.0, SIDE_OFFSET);
double angle = GeometryUtilities::calcAngle(lineSegment);
if (angle >= -5 && angle <= 5) {
if (endName)
endName->setPos(lineSegment.p1() + headOffset + sideOffset);
if (endCardinality)
endCardinality->setPos(lineSegment.p1() + headOffset - sideOffset
- endCardinality->boundingRect().bottomLeft());
} else if (angle <= -175 || angle >= 175) {
if (endName)
endName->setPos(lineSegment.p1() - headOffset + sideOffset - endName->boundingRect().topRight());
if (endCardinality)
endCardinality->setPos(lineSegment.p1() - headOffset
- sideOffset - endCardinality->boundingRect().bottomRight());
} else {
QRectF rect;
if (endCardinality)
rect = endCardinality->boundingRect();
if (endName)
rect = rect.united(endName->boundingRect().translated(rect.bottomLeft()));
QPointF rectPlacement;
GeometryUtilities::Side alignedSide = GeometryUtilities::SideUnspecified;
if (auto objectItem = dynamic_cast<IIntersectionable *>(endItem)) {
QPointF intersectionPoint;
QLineF intersectionLine;
if (objectItem->intersectShapeWithLine(GeometryUtilities::stretch(lineSegment.translated(pos()), 2.0, 0.0),
&intersectionPoint, &intersectionLine)) {
if (!GeometryUtilities::placeRectAtLine(rect, lineSegment, HEAD_OFFSET, SIDE_OFFSET,
intersectionLine, &rectPlacement, &alignedSide)) {
rectPlacement = intersectionPoint;
}
} else {
rectPlacement = lineSegment.p1();
}
} else {
rectPlacement = endItem->pos();
}
if (endCardinality) {
if (alignedSide == GeometryUtilities::SideRight)
endCardinality->setPos(rectPlacement
+ QPointF(rect.width() - endCardinality->boundingRect().width(), 0.0));
else
endCardinality->setPos(rectPlacement);
rectPlacement += endCardinality->boundingRect().bottomLeft();
}
if (endName) {
if (alignedSide == GeometryUtilities::SideRight)
endName->setPos(rectPlacement + QPointF(rect.width() - endName->boundingRect().width(), 0.0));
else
endName->setPos(rectPlacement);
}
}
}
} // namespace qmt
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