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// Copyright (C) 2016 Jochen Becher
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "diagramview.h"
#include "qmt/diagram_ui/diagram_mime_types.h"
#include "qmt/infrastructure/uid.h"
#include "qmt/diagram_scene/diagramscenemodel.h"
#include "qmt/tasks/diagramscenecontroller.h"
#include <QDragEnterEvent>
#include <QDragMoveEvent>
#include <QDragLeaveEvent>
#include <QDropEvent>
#include <QMimeData>
namespace qmt {
DiagramView::DiagramView(QWidget *parent)
: QGraphicsView(parent)
{
setAcceptDrops(true);
setAlignment(Qt::AlignLeft | Qt::AlignTop);
setDragMode(QGraphicsView::RubberBandDrag);
setFrameShape(QFrame::NoFrame);
setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
}
DiagramView::~DiagramView()
{
}
DiagramSceneModel *DiagramView::diagramSceneModel() const
{
return m_diagramSceneModel;
}
void DiagramView::setDiagramSceneModel(DiagramSceneModel *diagramSceneModel)
{
setScene(nullptr);
m_diagramSceneModel = diagramSceneModel;
if (diagramSceneModel) {
setScene(m_diagramSceneModel->graphicsScene());
connect(m_diagramSceneModel, &DiagramSceneModel::sceneRectChanged,
this, &DiagramView::onSceneRectChanged, Qt::QueuedConnection);
// Signal is connected after diagram is updated. Enforce setting of scene rect.
onSceneRectChanged(m_diagramSceneModel->sceneRect());
}
}
void DiagramView::dragEnterEvent(QDragEnterEvent *event)
{
if (event->mimeData()->hasFormat(QLatin1String(MIME_TYPE_MODEL_ELEMENTS))) {
bool accept = false;
QDataStream dataStream(event->mimeData()->data(QLatin1String(MIME_TYPE_MODEL_ELEMENTS)));
while (dataStream.status() == QDataStream::Ok) {
QString key;
dataStream >> key;
if (!key.isEmpty()) {
if (m_diagramSceneModel->diagramSceneController()
->isAddingAllowed(Uid(QUuid(key)), m_diagramSceneModel->diagram()))
accept = true;
}
}
event->setAccepted(accept);
} else if (event->mimeData()->hasFormat(QLatin1String(MIME_TYPE_NEW_MODEL_ELEMENTS))) {
bool accept = false;
QDataStream dataStream(event->mimeData()->data(QLatin1String(MIME_TYPE_NEW_MODEL_ELEMENTS)));
while (dataStream.status() == QDataStream::Ok) {
QString newElementId;
dataStream >> newElementId;
if (!newElementId.isEmpty()) {
// TODO ask a factory if newElementId is a known type
accept = true;
}
}
event->setAccepted(accept);
} else {
event->ignore();
}
}
void DiagramView::dragLeaveEvent(QDragLeaveEvent *event)
{
event->accept();
}
void DiagramView::dragMoveEvent(QDragMoveEvent *event)
{
event->accept();
}
void DiagramView::dropEvent(QDropEvent *event)
{
event->setDropAction(Qt::MoveAction);
DiagramSceneController *diagramSceneController = m_diagramSceneModel->diagramSceneController();
if (event->mimeData()->hasFormat(QLatin1String(MIME_TYPE_MODEL_ELEMENTS))) {
QDataStream dataStream(event->mimeData()->data(QLatin1String(MIME_TYPE_MODEL_ELEMENTS)));
while (dataStream.status() == QDataStream::Ok) {
QString key;
dataStream >> key;
if (!key.isEmpty()) {
if (diagramSceneController->isAddingAllowed(Uid(QUuid(key)),
m_diagramSceneModel->diagram())) {
diagramSceneController->addExistingModelElement(Uid(QUuid(key)),
mapToScene(event->pos()),
m_diagramSceneModel->diagram());
}
}
}
event->accept();
} else if (event->mimeData()->hasFormat(QLatin1String(MIME_TYPE_NEW_MODEL_ELEMENTS))) {
QDataStream dataStream(event->mimeData()->data(QLatin1String(MIME_TYPE_NEW_MODEL_ELEMENTS)));
while (dataStream.status() == QDataStream::Ok) {
QString newElementId;
QString name;
QString stereotype;
dataStream >> newElementId >> name >> stereotype;
if (!newElementId.isEmpty()) {
QPointF pos = mapToScene(event->pos());
diagramSceneController->dropNewElement(
newElementId, name, stereotype, m_diagramSceneModel->findTopmostElement(pos),
pos, m_diagramSceneModel->diagram(), event->pos(), size());
}
}
event->accept();
} else {
event->ignore();
}
}
void DiagramView::onSceneRectChanged(const QRectF &sceneRect)
{
// add some adjustment to all 4 sides
static const qreal ADJUSTMENT = 80;
QRectF rect = sceneRect.adjusted(-ADJUSTMENT, -ADJUSTMENT, ADJUSTMENT, ADJUSTMENT);
setSceneRect(rect);
}
} // namespace qmt
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