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// ************************************************************************** //
//
// BornAgain: simulate and fit scattering at grazing incidence
//
//! @file GUI/coregui/Views/CommonWidgets/ItemStackWidget.cpp
//! @brief Implements class ItemStackWidget
//!
//! @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/coregui/Views/CommonWidgets/ItemStackWidget.h"
#include "GUI/coregui/Models/SessionModel.h"
#include "GUI/coregui/utils/GUIHelpers.h"
#include <QStackedWidget>
#include <QVBoxLayout>
ItemStackWidget::ItemStackWidget(QWidget* parent)
: QWidget(parent), m_stackedWidget(new QStackedWidget), m_model(nullptr),
m_size_hint(QSize(1024, 1024))
{
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
m_stackedWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
QVBoxLayout* layout = new QVBoxLayout;
layout->setMargin(0);
layout->setSpacing(0);
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(m_stackedWidget);
setLayout(layout);
}
void ItemStackWidget::setModel(SessionModel* model)
{
if (model == m_model)
return;
disconnectModel();
m_model = model;
connectModel();
}
QSize ItemStackWidget::sizeHint() const
{
return m_size_hint;
}
QSize ItemStackWidget::minimumSizeHint() const
{
return QSize(25, 25);
}
void ItemStackWidget::setSizeHint(const QSize& size_hint)
{
m_size_hint = size_hint;
}
void ItemStackWidget::onModelAboutToBeReset()
{
removeWidgets();
}
void ItemStackWidget::onRowsAboutToBeRemoved(const QModelIndex& parent, int first, int)
{
SessionItem* item = m_model->itemForIndex(m_model->index(first, 0, parent));
removeWidgetForItem(item);
}
void ItemStackWidget::connectModel()
{
if (!m_model)
return;
connect(m_model, SIGNAL(modelAboutToBeReset()), this, SLOT(onModelAboutToBeReset()),
Qt::UniqueConnection);
connect(m_model, SIGNAL(rowsAboutToBeRemoved(QModelIndex, int, int)), this,
SLOT(onRowsAboutToBeRemoved(QModelIndex, int, int)), Qt::UniqueConnection);
}
void ItemStackWidget::disconnectModel()
{
if (!m_model)
return;
disconnect(m_model, SIGNAL(modelAboutToBeReset()), this, SLOT(onModelAboutToBeReset()));
disconnect(m_model, SIGNAL(rowsAboutToBeRemoved(QModelIndex, int, int)), this,
SLOT(onRowsAboutToBeRemoved(QModelIndex, int, int)));
}
//! Checks if model was set correctly.
void ItemStackWidget::validateItem(SessionItem* item)
{
if (!item)
return;
if (m_model) {
if (m_model != item->model())
// in principle it should be possible, but should be tested
throw GUIHelpers::Error("ItemStackWidget::validateItem() -> Error. "
"Attempt to use items from different models.");
} else {
setModel(item->model());
}
}
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