SpecularBeamEditor.cpp

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Instrument/SpecularBeamEditor.cpp
//! @brief     Defines class SpecularBeamEditor
//!
//! @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/SpecularBeamEditor.h"
#include "GUI/Model/Descriptor/DoubleDescriptor.h"
#include "GUI/Model/Device/BeamItems.h"
#include "GUI/Model/Device/BeamWavelengthItem.h"
#include "GUI/View/Common/FixupDoubleValidator.h"
#include "GUI/View/Instrument/DistributionEditor.h"
#include "GUI/View/Instrument/FootprintCorrectionEditor.h"
#include "GUI/View/Instrument/InclinationAnglesEditor.h"
#include "GUI/View/Instrument/InstrumentEditController.h"
#include "GUI/View/Tool/GroupBoxCollapser.h"
#include <QDoubleValidator>
#include <QFormLayout>
#include <QGridLayout>
#include <QLineEdit>
 
SpecularBeamEditor::SpecularBeamEditor(QWidget* parent, SpecularBeamItem* item,
                                       InstrumentEditController* ec)
    : QGroupBox("Beam parameters", parent)
{
    ASSERT(item);
 
    auto* vLayout = new QVBoxLayout(this);
    vLayout->setContentsMargins(30, 8, 0, 0);
    auto* form = new QFormLayout();
    form->setFieldGrowthPolicy(QFormLayout::FieldsStayAtSizeHint);
    vLayout->addLayout(form);
    auto* intensityLineEdit = new QLineEdit(this);
    intensityLineEdit->setToolTip("Beam intensity in neutrons (or gammas per second.");
    auto* validator = new FixupDoubleValidator(intensityLineEdit);
    validator->setNotation(QDoubleValidator::ScientificNotation);
    validator->setRange(0.0, 1e+32, 1000);
    intensityLineEdit->setValidator(validator);
    form->addRow("Intensity:", intensityLineEdit);
 
    auto* wavelengthEditor =
        new DistributionEditor("Wavelength", MeanConfig{true}, GUI::ID::Distributions::Symmetric,
                               this, item->wavelengthItem());
    vLayout->addWidget(wavelengthEditor);
 
    auto* inclinationEditor = new InclinationAnglesEditor(this, item->inclinationAngleItem());
    vLayout->addWidget(inclinationEditor);
 
    auto* footprintEditor = new FootprintCorrectionEditor(this, item);
    vLayout->addWidget(footprintEditor);
 
    intensityLineEdit->setText(QString::number(item->intensity()));
 
    GroupBoxCollapser::installIntoGroupBox(this);
 
    // order of the next two connections is important! Indicators have to be recalculated first,
    // then updated (recalculation is done in EditController)
    connect(wavelengthEditor, &DistributionEditor::distributionChanged, ec,
            &InstrumentEditController::notifyWavelengthDistributionChanged);
    connect(wavelengthEditor, &DistributionEditor::distributionChanged, inclinationEditor,
            &InclinationAnglesEditor::updateIndicators);
 
    // order of the next two connections is important! Wavelength has to be recalculated first,
    // then updated (recalculation is done in EditController)
    connect(inclinationEditor, &InclinationAnglesEditor::dataChanged, ec,
            &InstrumentEditController::notifyInclinationAxisChanged);
    connect(inclinationEditor, &InclinationAnglesEditor::dataChanged, wavelengthEditor,
            &DistributionEditor::updateData);
 
    connect(footprintEditor, &FootprintCorrectionEditor::dataChanged, this,
            &SpecularBeamEditor::dataChanged);
 
    // validate value while typing
    connect(intensityLineEdit, &QLineEdit::textEdited, [=]() {
        QString str = intensityLineEdit->text();
        int pos;
        if (intensityLineEdit->validator()->validate(str, pos) == QValidator::Acceptable) {
            item->setIntensity(intensityLineEdit->text().toDouble());
            emit dataChanged();
        }
    });
    // if validator does not assert the input value, it says about that,
    // and here we return to the last correct value
    connect(validator, &FixupDoubleValidator::fixupSignal, [=]() {
        auto* editor = qobject_cast<QLineEdit*>(validator->parent());
        editor->setText(QString::number(item->intensity(), 'g'));
    });
}