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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/ParEdit/FitParameterDelegate.cpp
//! @brief Implements class FitParameterDelegate.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2021
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/View/ParEdit/FitParameterDelegate.h"
#include "Base/Util/Assert.h"
#include "GUI/Model/Descriptor/ComboProperty.h"
#include "GUI/Model/Project/ProjectDocument.h"
#include "GUI/Model/Tune/FitParameterItem.h"
#include "GUI/View/Base/CustomEventFilters.h"
#include "GUI/View/ParEdit/CustomEditors.h"
#include "GUI/View/ParEdit/ParSpinBox.h"
#include <QApplication>
#include <QModelIndex>
#include <QSpinBox>
namespace {
double getStep(double val)
{
return val == 0.0 ? 1.0 : val / 100.;
}
bool isDoubleProperty(const QVariant& variant)
{
return variant.type() == QVariant::Double;
}
bool isComboProperty(const QVariant& variant)
{
return variant.canConvert<ComboProperty>();
}
bool hasStringRepresentation(const QModelIndex& index)
{
auto variant = index.data();
if (isComboProperty(variant))
return true;
if (isDoubleProperty(variant) && index.internalPointer())
return true;
return false;
}
QString toString(const QModelIndex& index)
{
auto variant = index.data();
if (isComboProperty(variant))
return variant.value<ComboProperty>().currentValue();
if (isDoubleProperty(variant) && index.internalPointer()) {
auto* item = static_cast<QObject*>(index.internalPointer());
auto* doubleItem = dynamic_cast<FitDoubleItem*>(item);
// only "Scientific SpinBoxes" in Fit-Window
return ParSpinBox::toString(doubleItem->value(), doubleItem->decimals());
}
return "";
}
QWidget* createEditorFromIndex(const QModelIndex& index, QWidget* parent)
{
if (!index.internalPointer())
return nullptr;
auto* item = static_cast<QObject*>(index.internalPointer());
CustomEditor* result(nullptr);
if (auto* doubleItem = dynamic_cast<FitDoubleItem*>(item)) {
// only Scientific SpinBoxes in Fit-Window
auto* editor = new ParSpinBoxEditor;
editor->setLimits(doubleItem->limits());
editor->setDecimals(doubleItem->decimals());
editor->setSingleStep(getStep(doubleItem->value()));
result = editor;
} else if (dynamic_cast<FitTypeItem*>(item))
result = new ComboPropertyEditor;
if (parent && result)
result->setParent(parent);
QObject::connect(result, &CustomEditor::dataChanged, [=] { gDoc->setModified(); });
return result;
}
} // namespace
FitParameterDelegate::FitParameterDelegate(QObject* parent)
: QStyledItemDelegate(parent)
{
}
void FitParameterDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,
const QModelIndex& index) const
{
if (::hasStringRepresentation(index)) {
QString text = ::toString(index);
paintCustomLabel(painter, option, index, text);
} else
QStyledItemDelegate::paint(painter, option, index);
}
QWidget* FitParameterDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option,
const QModelIndex& index) const
{
auto* result = ::createEditorFromIndex(index, parent);
if (!result) // falling back to default behaviour
return QStyledItemDelegate::createEditor(parent, option, index);
if (auto* customEditor = dynamic_cast<CustomEditor*>(result)) {
new TabFromFocusProxy(customEditor);
connect(customEditor, &CustomEditor::dataChanged, this,
&FitParameterDelegate::onCustomEditorDataChanged);
}
return result;
}
//! Propagates changed data from the editor to the model.
void FitParameterDelegate::setModelData(QWidget* editor, QAbstractItemModel* model,
const QModelIndex& index) const
{
if (!index.isValid())
return;
if (auto* customEditor = dynamic_cast<CustomEditor*>(editor))
model->setData(index, customEditor->editorData());
else
QStyledItemDelegate::setModelData(editor, model, index);
}
//! Propagates the data change from the model to the editor (if it is still opened).
void FitParameterDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{
if (!index.isValid())
return;
if (auto* customEditor = dynamic_cast<CustomEditor*>(editor))
customEditor->setData(index.data());
else
QStyledItemDelegate::setEditorData(editor, index);
}
//! Increases height of the row by 20% wrt the default.
QSize FitParameterDelegate::sizeHint(const QStyleOptionViewItem& option,
const QModelIndex& index) const
{
QSize result = QStyledItemDelegate::sizeHint(option, index);
result.setHeight(static_cast<int>(result.height() * 1.2));
return result;
}
//! Makes an editor occupying whole available space in a cell. If cell contains an icon
//! as a decoration (i.e. icon of material property), it will be hidden as soon as editor
//! up and running.
void FitParameterDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option,
const QModelIndex& index) const
{
QStyledItemDelegate::updateEditorGeometry(editor, option, index);
editor->setGeometry(option.rect);
}
//! Notifies everyone that the editor has completed editing the data.
void FitParameterDelegate::onCustomEditorDataChanged(const QVariant&)
{
auto* editor = qobject_cast<CustomEditor*>(sender());
ASSERT(editor);
emit commitData(editor);
}
//! Paints custom text in a a place corresponding given index.
void FitParameterDelegate::paintCustomLabel(QPainter* painter, const QStyleOptionViewItem& option,
const QModelIndex& index, const QString& text) const
{
QStyleOptionViewItem opt = option;
initStyleOption(&opt, index); // calling original method to take into accounts colors etc
opt.text = displayText(text, option.locale); // by overriding text with ours
const QWidget* widget = opt.widget;
QStyle* style = widget ? widget->style() : QApplication::style();
style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, widget);
}
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