DetectorAlignmentEditor.cpp

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Instrument/DetectorAlignmentEditor.cpp
//! @brief     Implements class DetectorAlignmentEditor
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#include "GUI/View/Instrument/DetectorAlignmentEditor.h"
#include "GUI/Model/Device/RectangularDetectorItem.h"
#include "GUI/View/Common/DoubleSpinBox.h"
#include "GUI/View/Tool/WidgetUtils.h"
#include <QComboBox>
#include <QFormLayout>
#include <QLabel>
 
namespace {
QString alignmentDescription(RectangularDetector::EDetectorArrangement a)
{
    switch (a) {
    case RectangularDetector::GENERIC:
        return "Intersection of normal and detector";
    case RectangularDetector::PERPENDICULAR_TO_SAMPLE:
        return "Intersection of sample x-axis and detector";
    case RectangularDetector::PERPENDICULAR_TO_DIRECT_BEAM:
        return "Intersection of direct beam and detector";
    case RectangularDetector::PERPENDICULAR_TO_REFLECTED_BEAM:
        return "Intersection of reflected beam and detector";
    case RectangularDetector::PERPENDICULAR_TO_REFLECTED_BEAM_DPOS:
        return "Intersection of direct beam and detector";
    default:
        ASSERT(false);
    }
}
 
} // namespace
 
DetectorAlignmentEditor::DetectorAlignmentEditor(QWidget* parent, RectangularDetectorItem* item)
    : QWidget(parent)
    , m_item(item)
{
    ASSERT(m_item);
    m_formLayout = new QFormLayout(this);
    m_formLayout->setContentsMargins(0, 15, 0, 0);
    m_formLayout->setSpacing(8);
 
    auto* m_combo =
        GUI::Util::createSelectionCombo(this, item->detectorAlignmentSelection(), [=](int) {
            createAligmentWidgets();
            emit dataChanged();
        });
    m_formLayout->addRow("Alignment:", m_combo);
 
    createAligmentWidgets();
}
 
DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(QFormLayout* parentFormLayout,
                                                      const DoubleDescriptor& d)
{
    auto* sb = GUI::Util::createSpinBox(parentFormLayout, d);
    connect(sb, &DoubleSpinBox::baseValueChanged, [=](double v) {
        if (d.get() != v) {
            d.set(v);
            emit dataChanged();
        }
    });
    return sb;
}
 
DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(QWidget* parent, const DoubleDescriptor& d)
{
    auto* sb = new DoubleSpinBox(parent, d);
    connect(sb, &DoubleSpinBox::baseValueChanged, [=](double v) {
        if (d.get() != v) {
            d.set(v);
            emit dataChanged();
        }
    });
    return sb;
}
 
void DetectorAlignmentEditor::addVector(QFormLayout* parentLayout, const VectorDescriptor& d)
{
    auto* layout = new QHBoxLayout;
 
    const auto add = [&](const DoubleDescriptor& d) {
        layout->addWidget(new QLabel(GUI::Util::labelWithUnit(d) + ":"));
        layout->addWidget(createSpinBox(parentLayout->parentWidget(), d));
    };
 
    add(d.x);
    add(d.y);
    add(d.z);
 
    layout->addItem(new QSpacerItem(0, 0, QSizePolicy::Expanding));
 
    parentLayout->addRow(d.label + ":", layout);
}
 
void DetectorAlignmentEditor::createAligmentWidgets()
{
    while (m_formLayout->rowCount() > 1)
        m_formLayout->removeRow(1);
 
    const QString descr = alignmentDescription(m_item->detectorAlignment());
    auto* layout = new QFormLayout;
    layout->setFieldGrowthPolicy(QFormLayout::FieldsStayAtSizeHint);
    layout->setContentsMargins(0, 0, 0, 0);
    m_formLayout->addRow("", layout);
 
    if (m_item->detectorAlignment() == RectangularDetector::GENERIC) {
        addVector(layout, m_item->normalVector());
        addVector(layout, m_item->directionVector());
        auto* layoutUV = new QFormLayout;
        createSpinBox(layoutUV, m_item->u0());
        createSpinBox(layoutUV, m_item->v0());
        layout->addRow(descr + ":", layoutUV);
    } else {
        auto* layoutUVD = new QFormLayout;
        createSpinBox(layoutUVD, m_item->u0());
        createSpinBox(layoutUVD, m_item->v0());
        createSpinBox(layoutUVD, m_item->distance());
        layout->addRow(descr + ":", layoutUVD);
    }
}