Method referenceMove

tests/backend/Datapicker/DatapickerTest.cpp:767–810

! * check the correctness of the data points after one of the reference points was moved on the scene. * In real this is not possible, because it is not implemented, but neverthless it shall be shown * that when moving reference points, the curves will be updated */

 * that when moving reference points, the curves will be updated
 */
void DatapickerTest::referenceMove() {
	Datapicker datapicker(QStringLiteral("Test"));
	datapicker.addNewPoint(QPointF(0, 1), datapicker.image());
	datapicker.addNewPoint(QPointF(0, 0), datapicker.image());
	datapicker.addNewPoint(QPointF(1, 0), datapicker.image());

	auto ap = datapicker.image()->axisPoints();
	ap.type = DatapickerImage::GraphType::Linear;
	datapicker.image()->setAxisPoints(ap);

	DatapickerImageWidget w(nullptr);
	w.setImages({datapicker.image()});
	w.ui.sbPositionX1->setValue(0);
	w.ui.sbPositionY1->setValue(10);
	w.ui.sbPositionZ1->setValue(0);
	w.ui.sbPositionX2->setValue(0);
	w.ui.sbPositionY2->setValue(0);
	w.ui.sbPositionZ2->setValue(0);
	w.ui.sbPositionX3->setValue(10);
	w.ui.sbPositionY3->setValue(0);
	w.ui.sbPositionZ3->setValue(0);
	w.logicalPositionChanged();

	auto* curve = new DatapickerCurve(i18n("Curve"));
	curve->addDatasheet(datapicker.image()->axisPoints().type);
	datapicker.addChild(curve);

	datapicker.addNewPoint(QPointF(0.5, 0.6), curve); // updates the curve data
	VALUES_EQUAL(curve->posXColumn()->valueAt(0), 5.);
	VALUES_EQUAL(curve->posYColumn()->valueAt(0), 6.);

	// Points are stored in the image
	auto points = datapicker.image()->children<DatapickerPoint>(AbstractAspect::ChildIndexFlag::IncludeHidden);
	QCOMPARE(points.count(), 3);

	// set position after mouse was released
	points[0]->setPosition(QPointF(0., 4));
	// points[1]->setPosition(QPointF(0.1, 0.));
	points[2]->setPosition(QPointF(2., 0.));

	// Currently not supported
	//    VALUES_EQUAL(curve->posXColumn()->valueAt(0), 0.5 / 2 * 10);
	//    VALUES_EQUAL(curve->posYColumn()->valueAt(0), 0.6 / 4  * 10);
}

void DatapickerTest::referenceMoveKeyPress() {
	Datapicker datapicker(QStringLiteral("Test"));