ItemComboWidget.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Common/ItemComboWidget.h
//! @brief     Defines class ItemComboWidget
//!
//! @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)
//
//  ************************************************************************************************
 
#ifndef BORNAGAIN_GUI_VIEW_COMMON_ITEMCOMBOWIDGET_H
#define BORNAGAIN_GUI_VIEW_COMMON_ITEMCOMBOWIDGET_H
 
#include "Base/Util/IFactory.h"
#include "GUI/View/Common/SessionItemWidget.h"
#include <QMap>
 
class SessionItem;
class SessionItemWidget;
class ItemComboToolbar;
class QStackedWidget;
 
//! The ItemComboWidget class combines stack of widgets with QComboBox controller to switch between
//! widgets. It is used in the case when one SessionItem can be presented with different widgets.
 
//! For example, in JobDatafieldWidget the results of the job can be presented with either
//! IntensityDataWidget or FitDataWidget, depending from the JobView's activity type.
 
//! For the presentation the special value of an empty string can be used which results in an
//! empty widget being shown (with the toolbar hidden). In this case the current item can also
//! be \c nullptr and this presentation needs not to be listed in the (active)PresentationList
//! functions.
 
class ItemComboWidget : public SessionItemWidget {
    Q_OBJECT
 
public:
    using factory_function_t = std::function<SessionItemWidget*()>;
 
    explicit ItemComboWidget(QWidget* parent = nullptr);
 
    void registerWidget(const QString& presentationType, factory_function_t);
 
    virtual void setPresentation(const QString& presentationType);
 
    void setToolbarVisible(bool value);
    void setItem(SessionItem* item) override;
 
protected:
    virtual QStringList activePresentationList(SessionItem* item);
    virtual QStringList presentationList(SessionItem* item);
    virtual QString itemPresentation() const;
    QString selectedPresentation() const;
    void subscribeToItem() override;
 
private slots:
    void onComboChanged(const QString& name);
 
private:
    void setSizeToCurrentWidget();
 
    ItemComboToolbar* m_toolbar;
    QStackedWidget* m_stackedWidget;
    IFactory<QString, SessionItemWidget> m_widgetFactory;
    QMap<QString, SessionItemWidget*> m_presentationTypeToWidget;
    QWidget* m_blankWidget;
};
 
#endif // BORNAGAIN_GUI_VIEW_COMMON_ITEMCOMBOWIDGET_H