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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 "relationstarter.h"
#include "qmt/diagram_scene/diagramscenemodel.h"
#include "qmt/diagram_scene/diagramsceneconstants.h"
#include "qmt/diagram_scene/capabilities/relationable.h"
#include "qmt/infrastructure/qmtassert.h"
#include "qmt/style/stylecontroller.h"
#include <QGraphicsSceneMouseEvent>
#include <QKeyEvent>
#include <QGraphicsScene>
#include <QPainter>
namespace qmt {
RelationStarter::RelationStarter(IRelationable *owner, DiagramSceneModel *diagramSceneModel, QGraphicsItem *parent)
: QGraphicsRectItem(parent),
m_owner(owner),
m_diagramSceneModel(diagramSceneModel)
{
setBrush(QBrush(QColor(192, 192, 192)));
setPen(QPen(QColor(64, 64, 64)));
setFlag(QGraphicsItem::ItemIsFocusable);
}
RelationStarter::~RelationStarter()
{
}
QRectF RelationStarter::boundingRect() const
{
return rect();
}
void RelationStarter::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
painter->save();
painter->setPen(pen());
painter->setBrush(brush());
painter->drawRoundedRect(rect(), 3, 3);
painter->restore();
}
void RelationStarter::addArrow(const QString &id, ArrowItem::Shaft shaft,
ArrowItem::Head startHead, ArrowItem::Head endHead,
const QString &toolTip)
{
QMT_CHECK(!id.isEmpty());
prepareGeometryChange();
auto arrow = new ArrowItem(this);
arrow->setArrowSize(10.0);
arrow->setDiamondSize(8.0);
arrow->setShaft(shaft);
arrow->setStartHead(startHead);
arrow->setEndHead(endHead);
arrow->setToolTip(toolTip.isEmpty() ? id : toolTip);
arrow->setPoints(QList<QPointF>() << QPointF(0.0, 10.0) << QPointF(15.0, 0.0));
arrow->setPos(6.0, m_arrows.size() * 20.0 + 8.0);
arrow->update(m_diagramSceneModel->styleController()->relationStarterStyle());
m_arrows.append(arrow);
m_arrowIds.insert(arrow, id);
setRect(0.0, 0.0, 26.0, m_arrows.size() * 20.0 + 6.0);
}
void RelationStarter::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (m_currentPreviewArrow)
return;
foreach (ArrowItem *item, m_arrows) {
if (item->boundingRect().contains(mapToItem(item, event->pos()))) {
prepareGeometryChange();
m_currentPreviewArrowIntermediatePoints.clear();
m_currentPreviewArrowId = m_arrowIds.value(item);
QMT_CHECK(!m_currentPreviewArrowId.isEmpty());
m_currentPreviewArrow = new ArrowItem(*item);
// TODO use constants for sizes (in relationitem.h also)
m_currentPreviewArrow->setArrowSize(12.0);
m_currentPreviewArrow->setDiamondSize(12.0);
m_currentPreviewArrow->setPoints(QList<QPointF>() << m_owner->relationStartPos() << mapToScene(event->pos()));
m_currentPreviewArrow->update(m_diagramSceneModel->styleController()->relationStarterStyle());
m_currentPreviewArrow->setZValue(PREVIEW_RELATION_ZVALUE);
scene()->addItem(m_currentPreviewArrow);
setFocus(); // receive keyboard events
break;
}
}
}
void RelationStarter::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
if (!m_currentPreviewArrow)
return;
updateCurrentPreviewArrow(mapToScene(event->pos()));
}
void RelationStarter::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (m_currentPreviewArrow) {
m_owner->relationDrawn(m_currentPreviewArrowId, mapToScene(event->pos()),
m_currentPreviewArrowIntermediatePoints);
m_currentPreviewArrow->scene()->removeItem(m_currentPreviewArrow);
delete m_currentPreviewArrow;
m_currentPreviewArrow = nullptr;
m_currentPreviewArrowIntermediatePoints.clear();
}
}
void RelationStarter::keyPressEvent(QKeyEvent *event)
{
if (!m_currentPreviewArrow)
return;
if (event->key() == Qt::Key_Shift) {
QPointF p = m_currentPreviewArrow->lastLineSegment().p1();
if (m_currentPreviewArrowIntermediatePoints.isEmpty() || m_currentPreviewArrowIntermediatePoints.last() != p) {
m_currentPreviewArrowIntermediatePoints.append(p);
// Do not update the preview arrow here because last two points are now identical which looks wired
}
} else if (event->key() == Qt::Key_Control) {
if (!m_currentPreviewArrowIntermediatePoints.isEmpty()) {
m_currentPreviewArrowIntermediatePoints.removeLast();
updateCurrentPreviewArrow(m_currentPreviewArrow->lastLineSegment().p1());
}
}
}
void RelationStarter::focusOutEvent(QFocusEvent *event)
{
Q_UNUSED(event)
if (m_currentPreviewArrow) {
m_currentPreviewArrow->scene()->removeItem(m_currentPreviewArrow);
delete m_currentPreviewArrow;
m_currentPreviewArrow = nullptr;
m_currentPreviewArrowIntermediatePoints.clear();
}
}
void RelationStarter::updateCurrentPreviewArrow(const QPointF &headPoint)
{
prepareGeometryChange();
m_currentPreviewArrow->setPoints(QList<QPointF>() << m_owner->relationStartPos()
<< m_currentPreviewArrowIntermediatePoints << headPoint);
m_currentPreviewArrow->update(m_diagramSceneModel->styleController()->relationStarterStyle());
}
} // namespace qmt
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