gui2::DataViewModel Class Reference

View model for ExperimentalDataModel with drag-and-drop support. More...

Inheritance diagram for gui2::DataViewModel:

Collaboration diagram for gui2::DataViewModel:

Public Member Functions
	DataViewModel (ExperimentalDataModel *model, QObject *parent=nullptr)
void	appendRow (ViewItem *parent, std::vector< std::unique_ptr< ViewItem >> items)
	Appends row of items to given parent. More...
bool	canDropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const override
	Returns true if we can drop item here. More...
void	clearRows (ViewItem *parent)
int	columnCount (const QModelIndex &parent=QModelIndex()) const override
QVariant	data (const QModelIndex &index, int role=Qt::DisplayRole) const override
bool	dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) 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
	Return the Qt flags for given index. We allow GraphItem drag, they can be dropped on CanvasItem. 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...
QMimeData *	mimeData (const QModelIndexList &index_list) const override
	Generate the mime data for all selected items. 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)
Qt::DropActions	supportedDragActions () const override
	Supported drag actions. More...
Qt::DropActions	supportedDropActions () const override
	Supported drop actions. More...
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

View model for ExperimentalDataModel with drag-and-drop support.

Definition at line 31 of file dataviewmodel.h.

Constructor & Destructor Documentation

DataViewModel()

gui2::DataViewModel::DataViewModel	(	ExperimentalDataModel *	model,
		QObject *	parent = nullptr
	)

Definition at line 34 of file dataviewmodel.cpp.

    : ModelView::TopItemsViewModel(model, parent)
{
}

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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canDropMimeData()

bool gui2::DataViewModel::canDropMimeData ( const QMimeData *  data, Qt::DropAction  action, int  row, int  column, const QModelIndex &  parent  ) const

override

Returns true if we can drop item here.

Definition at line 88 of file dataviewmodel.cpp.

{
    if (data->hasFormat(QString::fromStdString(ExperimentalDataMimeType)))
        if (auto target = sessionItemFromIndex(parent); target)
            return target->modelType() == Constants::CanvasItemType;
 
    return false;
}

References gui2::Constants::CanvasItemType, ModelView::ViewModelBase::data(), ModelView::ViewModelBase::parent(), and ModelView::ViewModel::sessionItemFromIndex().

Referenced by dropMimeData().

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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 canDropMimeData(), dropMimeData(), ModelView::ViewModel::headerData(), and TEST_F().

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dropMimeData()

bool gui2::DataViewModel::dropMimeData ( const QMimeData *  data, Qt::DropAction  action, int  row, int  column, const QModelIndex &  parent  )

override

Definition at line 98 of file dataviewmodel.cpp.

{
    if (!canDropMimeData(data, action, row, column, parent))
        return false;
 
    auto target = sessionItemFromIndex(parent);
 
    int requested_row = parent.isValid() ? parent.row() : row;
 
    // retrieving list of item identifiers and accessing items
    auto identifiers =
        Utils::deserialize(data->data(QString::fromStdString(ExperimentalDataMimeType)));
    for (auto id : identifiers) {
        auto item = sessionModel()->findItem(id.toStdString());
 
        int row = std::clamp(requested_row, 0, item->parent()->itemCount(item->tagRow().tag) - 1);
        sessionModel()->moveItem(item, target, {"", row});
    }
 
    return true;
}

References canDropMimeData(), ModelView::ViewModelBase::data(), ModelView::Utils::deserialize(), ModelView::SessionModel::findItem(), ModelView::SessionModel::moveItem(), ModelView::ViewModelBase::parent(), ModelView::ViewModel::sessionItemFromIndex(), and ModelView::ViewModel::sessionModel().

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findViews()

std::vector< ViewItem * > ViewModel::findViews ( const ModelView::SessionItem *  item ) const

inherited

Returns vector of all ViewItem's representing given SessionItem.

Definition at line 81 of file viewmodel.cpp.

{
    return m_controller->findViews(item);
}

References ModelView::ViewModel::m_controller.

Referenced by TEST_F().

flags()

Qt::ItemFlags gui2::DataViewModel::flags ( const QModelIndex &  index ) const

override

Return the Qt flags for given index. We allow GraphItem drag, they can be dropped on CanvasItem.

Definition at line 41 of file dataviewmodel.cpp.

{
    Qt::ItemFlags result = ViewModel::flags(index);
 
    if (auto item = sessionItemFromIndex(index); item) {
        if (item->modelType() == ModelView::Constants::GraphItemType)
            result |= Qt::ItemIsDragEnabled;
        else if (item->modelType() == Constants::CanvasItemType)
            result |= Qt::ItemIsDropEnabled;
    }
 
    return result;
}

References gui2::Constants::CanvasItemType, ModelView::ViewModelBase::flags(), ModelView::Constants::GraphItemType, ModelView::ViewModelBase::index(), and ModelView::ViewModel::sessionItemFromIndex().

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headerData()

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

overrideinherited

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 ModelView::ViewModel::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(), flags(), ModelView::ViewModelBase::flags(), ModelView::ViewModelBase::itemFromIndex(), ModelView::ViewModel::sessionItemFromIndex(), ModelView::ViewModelBase::setData(), TEST_F(), and ModelView::ViewModel::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(), ModelView::ViewModel::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

inherited

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 ModelView::ViewModel::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(), ModelView::ViewModel::sessionItemFromIndex(), ModelView::ViewModelBase::setData(), TEST_F(), and ModelView::ViewModel::viewItemFromIndex().

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mimeData()

QMimeData * gui2::DataViewModel::mimeData ( const QModelIndexList &  index_list ) const

override

Generate the mime data for all selected items.

Definition at line 57 of file dataviewmodel.cpp.

{
    auto result = new QMimeData;
 
    // Get the list of the identifiers
    QStringList identifiers;
    for (auto item : Utils::UniqueItemsFromIndex(index_list))
        identifiers.append(QString::fromStdString(item->identifier()));
 
    result->setData(QString::fromStdString(ExperimentalDataMimeType),
                    Utils::serialize(identifiers));
 
    return result;
}

References ModelView::Utils::serialize(), and ModelView::Utils::UniqueItemsFromIndex().

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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(), canDropMimeData(), ModelView::ViewModelBase::clearRows(), ModelView::ViewModelBase::columnCount(), 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 ModelView::ViewModel::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 ( )

inherited

Definition at line 45 of file viewmodel.cpp.

{
    return m_controller->rootSessionItem();
}

References ModelView::ViewModel::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

inherited

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 ModelView::ViewModel::m_controller.

Referenced by canDropMimeData(), dropMimeData(), flags(), and TEST_F().

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sessionModel()

SessionModel * ViewModel::sessionModel ( ) const

inherited

Definition at line 40 of file viewmodel.cpp.

{
    return m_controller->sessionModel();
}

References ModelView::ViewModel::m_controller.

Referenced by ModelView::ViewModel::ViewModel(), and 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 )

inherited

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 ModelView::ViewModel::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().

supportedDragActions()

Qt::DropActions gui2::DataViewModel::supportedDragActions ( ) const

override

Supported drag actions.

Definition at line 74 of file dataviewmodel.cpp.

{
    return Qt::TargetMoveAction;
}

supportedDropActions()

Qt::DropActions gui2::DataViewModel::supportedDropActions ( ) const

override

Supported drop actions.

Definition at line 81 of file dataviewmodel.cpp.

{
    return Qt::TargetMoveAction;
}

viewItemFromIndex()

ViewItem * ViewModel::viewItemFromIndex ( const QModelIndex &  index ) const

inherited

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

privateinherited

Definition at line 54 of file viewmodel.h.

Referenced by ModelView::ViewModel::ViewModel(), ModelView::ViewModel::findViews(), ModelView::ViewModel::headerData(), ModelView::ViewModel::indexOfSessionItem(), ModelView::ViewModel::rootSessionItem(), ModelView::ViewModel::sessionItemFromIndex(), ModelView::ViewModel::sessionModel(), and ModelView::ViewModel::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/gui2/importdataview/dataviewmodel.h
• /home/www/ba/gui2/importdataview/dataviewmodel.cpp