Method DatapickerImageView

src/frontend/datapicker/DatapickerImageView.cpp:53–112

! Constructor of the class. Creates a view for the DatapickerImage \c image and initializes the internal model. */

  Creates a view for the DatapickerImage \c image and initializes the internal model.
*/
DatapickerImageView::DatapickerImageView(DatapickerImage* image)
	: QGraphicsView()
	, m_image(image)
	, m_datapicker(dynamic_cast<Datapicker*>(m_image->parentAspect()))
	, m_transform(new Transform()) {
	setScene(m_image->scene());

	setRenderHint(QPainter::Antialiasing);
	setRubberBandSelectionMode(Qt::ContainsItemBoundingRect);
	setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
	setResizeAnchor(QGraphicsView::AnchorViewCenter);
	setMinimumSize(16, 16);
	setFocusPolicy(Qt::StrongFocus);

	viewport()->setAttribute(Qt::WA_OpaquePaintEvent);
	viewport()->setAttribute(Qt::WA_NoSystemBackground);
	setCacheMode(QGraphicsView::CacheBackground);

	initActions();
	initMenus();
	m_image->setSegmentsHoverEvent(true);
	setInteractive(true);

	changeZoom(zoomOriginAction);
	currentZoomAction = zoomInViewAction;

	if (m_image->plotPointsType() == DatapickerImage::PointsType::AxisPoints)
		setAxisPointsAction->setChecked(true);
	else if (m_image->plotPointsType() == DatapickerImage::PointsType::CurvePoints)
		setCurvePointsAction->setChecked(true);
	else
		selectSegmentAction->setChecked(true);

	handleImageActions();
	changeRotationAngle();

	// signal/slot connections
	// for general actions
	connect(m_image, &DatapickerImage::requestProjectContextMenu, this, &DatapickerImageView::createContextMenu);
	connect(m_image, &DatapickerImage::requestUpdate, this, &DatapickerImageView::updateBackground);
	connect(m_image, &DatapickerImage::requestUpdateActions, this, &DatapickerImageView::handleImageActions);
	connect(m_datapicker, &Datapicker::requestUpdateActions, this, &DatapickerImageView::handleImageActions);
	connect(m_image, &DatapickerImage::rotationAngleChanged, this, &DatapickerImageView::changeRotationAngle);

	// resize the view to make the complete scene visible.
	// no need to resize the view when the project is being opened,
	// all views will be resized to the stored values at the end
	if (!m_image->isLoading()) {
		float w = Worksheet::convertFromSceneUnits(sceneRect().width(), Worksheet::Unit::Inch);
		float h = Worksheet::convertFromSceneUnits(sceneRect().height(), Worksheet::Unit::Inch);
		w *= GuiTools::dpi(this).first;
		h *= GuiTools::dpi(this).second;
		resize(w * 1.1, h * 1.1);
	}

	// rescale to the original size
	static const float hscale = GuiTools::dpi(this).first / (Worksheet::convertToSceneUnits(1, Worksheet::Unit::Inch));
	static const float vscale = GuiTools::dpi(this).second / (Worksheet::convertToSceneUnits(1, Worksheet::Unit::Inch));