ModelView::ItemsTreeView Class Reference

Tree view to show items of SessionModel via ViewModel mechanism. More...

Inheritance diagram for ModelView::ItemsTreeView:

Collaboration diagram for ModelView::ItemsTreeView:

Signals
void	itemSelected (ModelView::SessionItem *)

Public Member Functions
	ItemsTreeView (QWidget *parent=nullptr)
	~ItemsTreeView () override
void	setRootSessionItem (SessionItem *item)
void	setSelected (SessionItem *item)
	Make given item selected in QTreeView. More...
void	setViewModel (std::unique_ptr< ViewModel > viewModel)
void	setViewModelDelegate (std::unique_ptr< ViewModelDelegate > delegate)
QTreeView *	treeView ()
ViewModel *	viewModel () const

Private Slots
void	onSelectionChanged (const QItemSelection &, const QItemSelection &)
	Processes selections in QTreeView. More...

Private Member Functions
QItemSelectionModel *	selectionModel ()
void	set_connected (bool flag)

Private Attributes
bool	m_block_selection
std::unique_ptr< ViewModelDelegate >	m_delegate
QTreeView *	m_treeView {nullptr}
std::unique_ptr< ViewModel >	m_viewModel

Detailed Description

Tree view to show items of SessionModel via ViewModel mechanism.

Provides notification mechanism for SessionItem selections, use custom delegate.

Definition at line 35 of file itemstreeview.h.

Constructor & Destructor Documentation

ItemsTreeView()

ItemsTreeView::ItemsTreeView ( QWidget *  parent = nullptr )

explicit

Definition at line 23 of file itemstreeview.cpp.

    : QWidget(parent)
    , m_treeView(new QTreeView)
    , m_delegate(std::make_unique<ViewModelDelegate>())
    , m_block_selection(false)
{
    auto layout = new QVBoxLayout;
    layout->setMargin(0);
    layout->setSpacing(0);
    layout->addWidget(m_treeView);
    setLayout(layout);
}

References m_treeView.

~ItemsTreeView()

ItemsTreeView::~ItemsTreeView ( )

overridedefault

Member Function Documentation

itemSelected

void ModelView::ItemsTreeView::itemSelected ( ModelView::SessionItem *  )

signal

Referenced by onSelectionChanged().

onSelectionChanged

void ItemsTreeView::onSelectionChanged ( const QItemSelection &  , const QItemSelection &    )

privateslot

Processes selections in QTreeView.

Finds SessionItem corresponding to selected indexes and emit itemSelected signal.

Definition at line 79 of file itemstreeview.cpp.

{
    if (m_block_selection)
        return;
 
    auto indexes = m_treeView->selectionModel()->selectedIndexes();
    if (!indexes.empty()) {
        auto item = m_viewModel->sessionItemFromIndex(indexes.at(0));
        m_block_selection = true;
        itemSelected(item);
        m_block_selection = false;
    }
}

References itemSelected(), m_block_selection, m_treeView, and m_viewModel.

Referenced by set_connected().

selectionModel()

QItemSelectionModel * ItemsTreeView::selectionModel ( )

private

Definition at line 110 of file itemstreeview.cpp.

{
    return m_treeView->selectionModel();
}

References m_treeView.

Referenced by set_connected(), and setSelected().

set_connected()

void ItemsTreeView::set_connected ( bool  flag )

private

Definition at line 93 of file itemstreeview.cpp.

{
    Q_ASSERT(selectionModel());
 
    if (flag)
        connect(selectionModel(), &QItemSelectionModel::selectionChanged, this,
                &ItemsTreeView::onSelectionChanged);
    else
        disconnect(selectionModel(), &QItemSelectionModel::selectionChanged, this,
                   &ItemsTreeView::onSelectionChanged);
}

References onSelectionChanged(), and selectionModel().

Referenced by setViewModel().

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setRootSessionItem()

void ItemsTreeView::setRootSessionItem

(

SessionItem *

item

)

Definition at line 65 of file itemstreeview.cpp.

{
    m_viewModel->setRootSessionItem(item);
    m_treeView->expandAll();
}

References m_treeView, and m_viewModel.

setSelected()

void ItemsTreeView::setSelected

(

SessionItem *

item

)

Make given item selected in QTreeView.

Definition at line 55 of file itemstreeview.cpp.

{
    if (!m_viewModel)
        return;
 
    auto indexes = m_viewModel->indexOfSessionItem(item);
    if (!indexes.empty())
        selectionModel()->select(indexes.at(0), QItemSelectionModel::SelectCurrent);
}

References m_viewModel, and selectionModel().

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setViewModel()

void ItemsTreeView::setViewModel

(

std::unique_ptr< ViewModel >

viewModel

)

Definition at line 38 of file itemstreeview.cpp.

{
    m_viewModel = std::move(viewModel);
    m_treeView->setItemDelegate(m_delegate.get());
    m_treeView->setModel(m_viewModel.get());
    m_treeView->expandAll();
    m_treeView->resizeColumnToContents(0);
    set_connected(true);
}

References m_delegate, m_treeView, m_viewModel, set_connected(), and viewModel().

Referenced by ModelView::AllItemsTreeView::AllItemsTreeView(), ModelView::TopItemsTreeView::TopItemsTreeView(), and ModelView::PropertyTreeView::setItem().

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setViewModelDelegate()

void ItemsTreeView::setViewModelDelegate

(

std::unique_ptr< ViewModelDelegate >

delegate

)

Definition at line 48 of file itemstreeview.cpp.

{
    m_delegate = std::move(delegate);
}

References m_delegate.

Referenced by gui2::InstrumentPropertyEditor::setModels().

treeView()

QTreeView * ItemsTreeView::treeView

(

)

Definition at line 105 of file itemstreeview.cpp.

{
    return m_treeView;
}

References m_treeView.

Referenced by ModelView::PropertyTreeView::PropertyTreeView(), ModelView::PropertyTreeView::setItem(), and gui2::InstrumentPropertyEditor::setModels().

viewModel()

ViewModel * ItemsTreeView::viewModel

(

)

const

Definition at line 71 of file itemstreeview.cpp.

{
    return m_viewModel.get();
}

References m_viewModel.

Referenced by ModelView::PropertyTreeView::setItem(), and setViewModel().

Member Data Documentation

m_block_selection

bool ModelView::ItemsTreeView::m_block_selection

private

Definition at line 68 of file itemstreeview.h.

Referenced by onSelectionChanged().

m_delegate

std::unique_ptr<ViewModelDelegate> ModelView::ItemsTreeView::m_delegate

private

Definition at line 67 of file itemstreeview.h.

Referenced by setViewModel(), and setViewModelDelegate().

m_treeView

QTreeView* ModelView::ItemsTreeView::m_treeView {nullptr}

private

Definition at line 65 of file itemstreeview.h.

Referenced by ItemsTreeView(), onSelectionChanged(), selectionModel(), setRootSessionItem(), setViewModel(), and treeView().

m_viewModel

std::unique_ptr<ViewModel> ModelView::ItemsTreeView::m_viewModel

private

Definition at line 66 of file itemstreeview.h.

Referenced by onSelectionChanged(), setRootSessionItem(), setSelected(), setViewModel(), and viewModel().

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The documentation for this class was generated from the following files:

• /home/www/ba/mvvm/view/mvvm/widgets/itemstreeview.h
• /home/www/ba/mvvm/view/mvvm/widgets/itemstreeview.cpp