itemstreeview.h

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//  ************************************************************************************************
//
//  qt-mvvm: Model-view-view-model framework for large GUI applications
//
//! @file      mvvm/view/mvvm/widgets/itemstreeview.h
//! @brief     Defines class CLASS?
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2020
//! @authors   Gennady Pospelov et al, Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#ifndef BORNAGAIN_MVVM_VIEW_MVVM_WIDGETS_ITEMSTREEVIEW_H
#define BORNAGAIN_MVVM_VIEW_MVVM_WIDGETS_ITEMSTREEVIEW_H
 
#include "mvvm/view_export.h"
#include <QWidget>
#include <memory>
 
class QTreeView;
class QItemSelection;
class QItemSelectionModel;
 
namespace ModelView {
 
class SessionItem;
class ViewModel;
class ViewModelDelegate;
 
//! Tree view to show items of SessionModel via ViewModel mechanism.
//! Provides notification mechanism for SessionItem selections, use custom delegate.
 
class MVVM_VIEW_EXPORT ItemsTreeView : public QWidget {
    Q_OBJECT
 
public:
    explicit ItemsTreeView(QWidget* parent = nullptr);
    ~ItemsTreeView() override;
 
    QTreeView* treeView();
 
    void setViewModel(std::unique_ptr<ViewModel> viewModel);
 
    void setViewModelDelegate(std::unique_ptr<ViewModelDelegate> delegate);
 
    void setSelected(SessionItem* item);
 
    void setRootSessionItem(SessionItem* item);
 
    ViewModel* viewModel() const;
 
signals:
    void itemSelected(ModelView::SessionItem*);
 
private slots:
    void onSelectionChanged(const QItemSelection&, const QItemSelection&);
 
private:
    QItemSelectionModel* selectionModel();
 
    void set_connected(bool flag);
 
    QTreeView* m_treeView{nullptr};
    std::unique_ptr<ViewModel> m_viewModel;
    std::unique_ptr<ViewModelDelegate> m_delegate;
    bool m_block_selection;
};
 
} // namespace ModelView
 
#endif // BORNAGAIN_MVVM_VIEW_MVVM_WIDGETS_ITEMSTREEVIEW_H