ModelView::ViewModel Class Reference

Main class to represent content of SessionModel in Qt's trees and tables. More...

Inheritance diagram for ModelView::ViewModel:

Collaboration diagram for ModelView::ViewModel:

Public Member Functions
	ViewModel (std::unique_ptr< ViewModelController > controller, QObject *parent=nullptr)
	~ViewModel () override
void	appendRow (ViewItem *parent, std::vector< std::unique_ptr< ViewItem >> items)
	Appends row of items to given parent. More...
void	clearRows (ViewItem *parent)
int	columnCount (const QModelIndex &parent=QModelIndex()) const override
QVariant	data (const QModelIndex &index, int role=Qt::DisplayRole) const override
std::vector< ViewItem * >	findViews (const ModelView::SessionItem *item) const
	Returns vector of all ViewItem's representing given SessionItem. More...
Qt::ItemFlags	flags (const QModelIndex &index) const override
	Returns the item flags for the given index. More...
QVariant	headerData (int section, Qt::Orientation orientation, int role=Qt::DisplayRole) const override
QModelIndex	index (int row, int column, const QModelIndex &parent=QModelIndex()) const override
QModelIndex	indexFromItem (const ViewItem *item) const
	Returns the QModelIndex associated with the given item. More...
QModelIndexList	indexOfSessionItem (const SessionItem *item) const
	Returns list of model indices representing given SessionItem. More...
void	insertRow (ViewItem *parent, int row, std::vector< std::unique_ptr< ViewItem >> items)
	Insert a row of items at index 'row' to given parent. More...
ViewItem *	itemFromIndex (const QModelIndex &index) const
	Returns a pointer to the RefViewItem associated with the given index. More...
QModelIndex	parent (const QModelIndex &child) const override
void	removeRow (ViewItem *parent, int row)
ViewItem *	rootItem () const
	Returns a pointer to invisible root item. More...
SessionItem *	rootSessionItem ()
int	rowCount (const QModelIndex &parent=QModelIndex()) const override
SessionItem *	sessionItemFromIndex (const QModelIndex &index) const
SessionModel *	sessionModel () const
bool	setData (const QModelIndex &index, const QVariant &value, int role) override
void	setRootSessionItem (SessionItem *item)
ViewItem *	viewItemFromIndex (const QModelIndex &index) const

Private Member Functions
void	setRootViewItem (std::unique_ptr< ViewItem > root_item)
	Sets new root item. Previous item will be deleted, model will be reset. More...

Private Attributes
std::unique_ptr< ViewModelController >	m_controller
std::unique_ptr< ViewModelBaseImpl >	p_impl

Detailed Description

Main class to represent content of SessionModel in Qt's trees and tables.

Definition at line 29 of file viewmodel.h.

Constructor & Destructor Documentation

ViewModel()

ViewModel::ViewModel	(	std::unique_ptr< ViewModelController >	controller,
		QObject *	parent = nullptr
	)

Definition at line 23 of file viewmodel.cpp.

    : ViewModelBase(parent), m_controller(std::move(controller))
{
    m_controller->setViewModel(this);
    m_controller->setRootSessionItem(sessionModel()->rootItem());
}

References m_controller, ModelView::ViewModelBase::rootItem(), and sessionModel().

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~ViewModel()

ViewModel::~ViewModel ( )

overridedefault

Member Function Documentation

appendRow()

void ViewModelBase::appendRow ( ViewItem *  parent, std::vector< std::unique_ptr< ViewItem >>  items  )

inherited

Appends row of items to given parent.

Definition at line 165 of file viewmodelbase.cpp.

{
    insertRow(parent, parent->rowCount(), std::move(items));
}

References ModelView::ViewModelBase::insertRow(), and ModelView::ViewModelBase::parent().

Referenced by ModelView::ViewModelController::ViewModelControllerImpl::iterate(), and TEST_F().

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clearRows()

void ViewModelBase::clearRows ( ViewItem *  parent )

inherited

Definition at line 135 of file viewmodelbase.cpp.

{
    if (!p_impl->item_belongs_to_model(parent))
        throw std::runtime_error(
            "Error in ViewModelBase: attempt to use parent from another model");
 
    if (!parent->rowCount())
        return;
 
    beginRemoveRows(indexFromItem(parent), 0, parent->rowCount() - 1);
    parent->clear();
    endRemoveRows();
}

References ModelView::ViewModelBase::indexFromItem(), ModelView::ViewModelBase::p_impl, and ModelView::ViewModelBase::parent().

Referenced by ModelView::ViewModelController::ViewModelControllerImpl::remove_children_of_view(), and TEST_F().

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columnCount()

int ViewModelBase::columnCount ( const QModelIndex &  parent = QModelIndex() ) const

overrideinherited

Definition at line 70 of file viewmodelbase.cpp.

{
    auto parent_item = itemFromIndex(parent);
    return parent_item ? parent_item->columnCount() : rootItem()->columnCount();
}

References ModelView::ViewItem::columnCount(), ModelView::ViewModelBase::itemFromIndex(), ModelView::ViewModelBase::parent(), and ModelView::ViewModelBase::rootItem().

Referenced by ModelView::ViewModelBase::index(), and TEST_F().

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data()

QVariant ViewModelBase::data ( const QModelIndex &  index, int  role = Qt::DisplayRole  ) const

overrideinherited

Definition at line 76 of file viewmodelbase.cpp.

{
    if (!rootItem())
        return QVariant();
 
    auto item = itemFromIndex(index);
    return item ? item->data(role) : QVariant();
}

References ModelView::ViewModelBase::index(), ModelView::ViewModelBase::itemFromIndex(), and ModelView::ViewModelBase::rootItem().

Referenced by gui2::DataViewModel::canDropMimeData(), gui2::DataViewModel::dropMimeData(), headerData(), and TEST_F().

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findViews()

std::vector< ViewItem * > ViewModel::findViews

(

const ModelView::SessionItem *

item

)

const

Returns vector of all ViewItem's representing given SessionItem.

Definition at line 81 of file viewmodel.cpp.

{
    return m_controller->findViews(item);
}

References m_controller.

Referenced by TEST_F().

flags()

Qt::ItemFlags ViewModelBase::flags ( const QModelIndex &  index ) const

overrideinherited

Returns the item flags for the given index.

Definition at line 172 of file viewmodelbase.cpp.

{
    Qt::ItemFlags result = QAbstractItemModel::flags(index);
    if (auto item = itemFromIndex(index); item)
        result |= item->flags();
    return result;
}

References ModelView::ViewModelBase::index(), and ModelView::ViewModelBase::itemFromIndex().

Referenced by gui2::DataViewModel::flags(), and TEST_F().

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headerData()

QVariant ViewModel::headerData ( int  section, Qt::Orientation  orientation, int  role = Qt::DisplayRole  ) const

override

Definition at line 30 of file viewmodel.cpp.

{
    if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
        auto data = m_controller->horizontalHeaderLabels();
        if (section < data.size())
            return data.at(section);
    }
    return QVariant();
}

References ModelView::ViewModelBase::data(), and m_controller.

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index()

QModelIndex ViewModelBase::index ( int  row, int  column, const QModelIndex &  parent = QModelIndex()  ) const

overrideinherited

Definition at line 42 of file viewmodelbase.cpp.

{
    auto parent_item = itemFromIndex(parent) ? itemFromIndex(parent) : rootItem();
    const bool is_valid_row = row >= 0 && row < rowCount(parent);
    const bool is_valid_column = column >= 0 && column < columnCount(parent);
    return is_valid_row && is_valid_column
               ? createIndex(row, column, parent_item->child(row, column))
               : QModelIndex();
}

References ModelView::ViewModelBase::columnCount(), ModelView::ViewModelBase::itemFromIndex(), ModelView::ViewModelBase::parent(), ModelView::ViewModelBase::rootItem(), and ModelView::ViewModelBase::rowCount().

Referenced by ModelView::ViewModelBase::data(), gui2::DataViewModel::flags(), ModelView::ViewModelBase::flags(), ModelView::ViewModelBase::itemFromIndex(), sessionItemFromIndex(), ModelView::ViewModelBase::setData(), TEST_F(), and viewItemFromIndex().

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indexFromItem()

QModelIndex ViewModelBase::indexFromItem ( const ViewItem *  item ) const

inherited

Returns the QModelIndex associated with the given item.

Definition at line 117 of file viewmodelbase.cpp.

{
    return item && item->parent()
               ? createIndex(item->row(), item->column(), const_cast<ViewItem*>(item))
               : QModelIndex();
}

References ModelView::ViewItem::column(), ModelView::ViewItem::parent(), and ModelView::ViewItem::row().

Referenced by ModelView::ViewModelBase::clearRows(), indexOfSessionItem(), ModelView::ViewModelBase::insertRow(), ModelView::ViewModelBase::ViewModelBaseImpl::item_belongs_to_model(), ModelView::ViewModelBase::removeRow(), and TEST_F().

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indexOfSessionItem()

QModelIndexList ViewModel::indexOfSessionItem

(

const SessionItem *

item

)

const

Returns list of model indices representing given SessionItem.

Definition at line 71 of file viewmodel.cpp.

{
    QModelIndexList result;
    for (auto view : m_controller->findViews(item))
        result.push_back(indexFromItem(view));
    return result;
}

References ModelView::ViewModelBase::indexFromItem(), and m_controller.

Referenced by gui2::DataSelectionModel::selectItems(), gui2::LayerSelectionModel::selectItems(), gui2::MaterialSelectionModel::selectItems(), and TEST_F().

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insertRow()

void ViewModelBase::insertRow ( ViewItem *  parent, int  row, std::vector< std::unique_ptr< ViewItem >>  items  )

inherited

Insert a row of items at index 'row' to given parent.

Definition at line 151 of file viewmodelbase.cpp.

{
    if (!p_impl->item_belongs_to_model(parent))
        throw std::runtime_error(
            "Error in ViewModelBase: attempt to use parent from another model");
 
    beginInsertRows(indexFromItem(parent), row, row);
    parent->insertRow(row, std::move(items));
    endInsertRows();
}

References ModelView::ViewModelBase::indexFromItem(), ModelView::ViewModelBase::p_impl, and ModelView::ViewModelBase::parent().

Referenced by ModelView::ViewModelBase::appendRow(), ModelView::ViewModelController::ViewModelControllerImpl::insert_view(), and TEST_F().

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itemFromIndex()

ViewItem * ViewModelBase::itemFromIndex ( const QModelIndex &  index ) const

inherited

Returns a pointer to the RefViewItem associated with the given index.

If index is invalid, returns nullptr.

Definition at line 110 of file viewmodelbase.cpp.

{
    return index.isValid() ? static_cast<ViewItem*>(index.internalPointer()) : nullptr;
}

References ModelView::ViewModelBase::index().

Referenced by ModelView::ViewModelBase::columnCount(), ModelView::ViewModelBase::data(), ModelView::ViewModelController::ViewModelControllerImpl::findViews(), ModelView::ViewModelBase::flags(), ModelView::ViewModelBase::index(), ModelView::ViewModelBase::parent(), ModelView::ViewModelBase::rowCount(), sessionItemFromIndex(), ModelView::ViewModelBase::setData(), TEST_F(), and viewItemFromIndex().

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parent()

QModelIndex ViewModelBase::parent ( const QModelIndex &  child ) const

overrideinherited

Definition at line 52 of file viewmodelbase.cpp.

{
    if (auto child_item = itemFromIndex(child); child_item) {
        auto parent_item = child_item->parent();
        return parent_item == rootItem()
                   ? QModelIndex()
                   : createIndex(parent_item->row(), parent_item->column(), parent_item);
    }
 
    return QModelIndex();
}

References ModelView::ViewModelBase::itemFromIndex(), and ModelView::ViewModelBase::rootItem().

Referenced by ModelView::ViewModelBase::appendRow(), gui2::DataViewModel::canDropMimeData(), ModelView::ViewModelBase::clearRows(), ModelView::ViewModelBase::columnCount(), gui2::DataViewModel::dropMimeData(), ModelView::ViewModelBase::index(), ModelView::ViewModelBase::insertRow(), ModelView::ViewModelBase::removeRow(), ModelView::ViewModelBase::rowCount(), and TEST_F().

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removeRow()

void ViewModelBase::removeRow ( ViewItem *  parent, int  row  )

inherited

Definition at line 124 of file viewmodelbase.cpp.

{
    if (!p_impl->item_belongs_to_model(parent))
        throw std::runtime_error(
            "Error in ViewModelBase: attempt to use parent from another model");
 
    beginRemoveRows(indexFromItem(parent), row, row);
    parent->removeRow(row);
    endRemoveRows();
}

References ModelView::ViewModelBase::indexFromItem(), ModelView::ViewModelBase::p_impl, and ModelView::ViewModelBase::parent().

Referenced by ModelView::ViewModelController::ViewModelControllerImpl::remove_row_of_views(), and TEST_F().

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rootItem()

ViewItem * ViewModelBase::rootItem ( ) const

inherited

Returns a pointer to invisible root item.

Definition at line 102 of file viewmodelbase.cpp.

{
    return p_impl->root.get();
}

References ModelView::ViewModelBase::p_impl.

Referenced by ViewModel(), ModelView::ViewModelBase::columnCount(), ModelView::ViewModelBase::data(), ModelView::ViewModelController::ViewModelControllerImpl::findViews(), ModelView::ViewModelBase::index(), ModelView::ViewModelController::ViewModelControllerImpl::init_view_model(), ModelView::ViewModelBase::ViewModelBaseImpl::item_belongs_to_model(), ModelView::ViewModelBase::parent(), ModelView::ViewModelBase::rowCount(), and TEST_F().

rootSessionItem()

SessionItem * ViewModel::rootSessionItem

(

)

Definition at line 45 of file viewmodel.cpp.

{
    return m_controller->rootSessionItem();
}

References m_controller.

rowCount()

int ViewModelBase::rowCount ( const QModelIndex &  parent = QModelIndex() ) const

overrideinherited

Definition at line 64 of file viewmodelbase.cpp.

{
    auto parent_item = itemFromIndex(parent);
    return parent_item ? parent_item->rowCount() : rootItem()->rowCount();
}

References ModelView::ViewModelBase::itemFromIndex(), ModelView::ViewModelBase::parent(), ModelView::ViewModelBase::rootItem(), and ModelView::ViewItem::rowCount().

Referenced by ModelView::ViewModelBase::index(), and TEST_F().

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sessionItemFromIndex()

SessionItem * ViewModel::sessionItemFromIndex

(

const QModelIndex &

index

)

const

Definition at line 59 of file viewmodel.cpp.

{
    return index.isValid() ? itemFromIndex(index)->item() : m_controller->rootSessionItem();
}

References ModelView::ViewModelBase::index(), ModelView::ViewItem::item(), ModelView::ViewModelBase::itemFromIndex(), and m_controller.

Referenced by gui2::DataViewModel::canDropMimeData(), gui2::DataViewModel::dropMimeData(), gui2::DataViewModel::flags(), and TEST_F().

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sessionModel()

SessionModel * ViewModel::sessionModel

(

)

const

Definition at line 40 of file viewmodel.cpp.

{
    return m_controller->sessionModel();
}

References m_controller.

Referenced by ViewModel(), and gui2::DataViewModel::dropMimeData().

setData()

bool ViewModelBase::setData ( const QModelIndex &  index, const QVariant &  value, int  role  )

overrideinherited

Definition at line 85 of file viewmodelbase.cpp.

{
    if (!index.isValid())
        return false;
 
    if (auto item = itemFromIndex(index); item) {
        bool result = item->setData(value, role);
        if (result)
            dataChanged(index, index, QVector<int>() << role);
        return result;
    }
 
    return false;
}

References ModelView::ViewModelBase::index(), and ModelView::ViewModelBase::itemFromIndex().

Referenced by TEST_F().

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setRootSessionItem()

void ViewModel::setRootSessionItem

(

SessionItem *

item

)

Definition at line 52 of file viewmodel.cpp.

{
    if (!item)
        throw std::runtime_error("Error in ViewModel: atttemp to set nulptr as root item");
    m_controller->setRootSessionItem(item);
}

References m_controller.

Referenced by gui2::ImportDataEditor::ImportDataEditor(), ModelView::PropertyTreeView::setItem(), and TEST_F().

setRootViewItem()

void ViewModelBase::setRootViewItem ( std::unique_ptr< ViewItem >  root_item )

privateinherited

Sets new root item. Previous item will be deleted, model will be reset.

Definition at line 182 of file viewmodelbase.cpp.

{
    p_impl->root = std::move(root_item);
}

References ModelView::ViewModelBase::p_impl.

Referenced by ModelView::ViewModelBase::ViewModelBase(), and ModelView::ViewModelController::ViewModelControllerImpl::setRootSessionItemIntern().

viewItemFromIndex()

ViewItem * ViewModel::viewItemFromIndex

(

const QModelIndex &

index

)

const

Definition at line 64 of file viewmodel.cpp.

{
    return itemFromIndex(index);
}

References ModelView::ViewModelBase::index(), and ModelView::ViewModelBase::itemFromIndex().

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Member Data Documentation

m_controller

std::unique_ptr<ViewModelController> ModelView::ViewModel::m_controller

private

Definition at line 54 of file viewmodel.h.

Referenced by ViewModel(), findViews(), headerData(), indexOfSessionItem(), rootSessionItem(), sessionItemFromIndex(), sessionModel(), and setRootSessionItem().

p_impl

std::unique_ptr<ViewModelBaseImpl> ModelView::ViewModelBase::p_impl

privateinherited

Definition at line 70 of file viewmodelbase.h.

Referenced by ModelView::ViewModelBase::clearRows(), ModelView::ViewModelBase::insertRow(), ModelView::ViewModelBase::removeRow(), ModelView::ViewModelBase::rootItem(), and ModelView::ViewModelBase::setRootViewItem().

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

• /home/www/ba/mvvm/viewmodel/mvvm/viewmodel/viewmodel.h
• /home/www/ba/mvvm/viewmodel/mvvm/viewmodel/viewmodel.cpp