Lightweight tree model for DataStorage contents. More...

#include <QmitkDataStorageSimpleTreeModel.h>

Inheritance diagram for QmitkDataStorageSimpleTreeModel:

Collaboration diagram for QmitkDataStorageSimpleTreeModel:

[legend]

Public Member Functions
	QmitkDataStorageSimpleTreeModel (QObject *parent)
	Constructs the tree model. More...

	~QmitkDataStorageSimpleTreeModel () override

void	DataStorageChanged () override
	Called when the data storage has changed. Rebuilds the tree. More...

void	NodePredicateChanged () override
	Called when the node predicate has changed. Rebuilds the tree. More...

void	NodeAdded (const mitk::DataNode *node) override
	Called when a node is added to the data storage. More...

void	NodeChanged (const mitk::DataNode *node) override
	Called when a node in the data storage has changed. More...

void	NodeRemoved (const mitk::DataNode *node) override
	Called when a node is removed from the data storage. More...

QModelIndex	index (int row, int column, const QModelIndex &parent=QModelIndex()) const override
	Returns the model index for the given row and column under the given parent. More...

QModelIndex	parent (const QModelIndex &child) const override
	Returns the parent index for the given child. More...

int	rowCount (const QModelIndex &parent=QModelIndex()) const override
	Returns the number of child rows under the given parent. More...

int	columnCount (const QModelIndex &parent=QModelIndex()) const override
	Returns the number of columns (always 1). More...

QVariant	data (const QModelIndex &index, int role=Qt::DisplayRole) const override
	Returns data for the given index and role. More...

bool	setData (const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override
	Sets data at the given index (supports renaming nodes). More...

QVariant	headerData (int section, Qt::Orientation orientation, int role=Qt::DisplayRole) const override
	Returns header data for the given section. More...

Qt::ItemFlags	flags (const QModelIndex &index) const override
	Returns item flags for the given index. More...

Public Member Functions inherited from QmitkAbstractDataStorageModel
	~QmitkAbstractDataStorageModel () override

void	SetDataStorage (mitk::DataStorage *dataStorage)
	Sets the data storage and registers node event listeners. More...

mitk::DataStorage::Pointer	GetDataStorage () const
	Returns a locked pointer to the current data storage. More...

void	SetNodePredicate (const mitk::NodePredicateBase *nodePredicate)
	Sets the node predicate and triggers a model update. More...

const mitk::NodePredicateBase *	GetNodePredicate () const
	Returns the currently set node predicate. More...

Protected Types
using	TreeItem = QmitkDataStorageTreeModelInternalItem

Additional Inherited Members
Protected Member Functions inherited from QmitkAbstractDataStorageModel
	QmitkAbstractDataStorageModel (QObject *parent=nullptr)

	QmitkAbstractDataStorageModel (mitk::DataStorage dataStorage, QObject parent=nullptr)

Protected Attributes inherited from QmitkAbstractDataStorageModel
mitk::WeakPointer< mitk::DataStorage >	m_DataStorage

mitk::NodePredicateBase::ConstPointer	m_NodePredicate

Detailed Description

Lightweight tree model for DataStorage contents.

This model extends QmitkAbstractDataStorageModel to present data storage nodes in a tree hierarchy reflecting parent-child source relationships. It is a simplified alternative to QmitkDataStorageTreeModel with the following design differences:

Drag-and-drop is not supported.
Node hierarchy and layer properties cannot be modified through the model.
When a node is removed, the entire tree is rebuilt rather than re-parenting orphaned children, ensuring the model always reflects the actual data storage graph.

See also: QmitkAbstractDataStorageModel; QmitkDataStorageTreeModel; QmitkDataStorageTreeInspector

Definition at line 41 of file QmitkDataStorageSimpleTreeModel.h.

Member Typedef Documentation

◆ TreeItem

using QmitkDataStorageSimpleTreeModel::TreeItem = QmitkDataStorageTreeModelInternalItem

protected

Definition at line 141 of file QmitkDataStorageSimpleTreeModel.h.

Constructor & Destructor Documentation

◆ QmitkDataStorageSimpleTreeModel()

QmitkDataStorageSimpleTreeModel::QmitkDataStorageSimpleTreeModel ( QObject * parent )

Constructs the tree model.

Parameters

[in] parent The parent QObject.

◆ ~QmitkDataStorageSimpleTreeModel()

QmitkDataStorageSimpleTreeModel::~QmitkDataStorageSimpleTreeModel ( )

override

Member Function Documentation

◆ columnCount()

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

override

Returns the number of columns (always 1).

Parameters

[in] parent The parent index.

Returns: 1.

◆ data()

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

override

Returns data for the given index and role.

Parameters

[in]	index	The model index.
[in]	role	The data role.

Returns: The requested data as QVariant.

◆ DataStorageChanged()

void QmitkDataStorageSimpleTreeModel::DataStorageChanged ( )

overridevirtual

Called when the data storage has changed. Rebuilds the tree.

Implements QmitkAbstractDataStorageModel.

◆ flags()

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

override

Returns item flags for the given index.

Parameters

[in] index The model index.

Returns: Item flags including Qt::ItemIsEditable for valid indexes.

◆ headerData()

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

override

Returns header data for the given section.

Parameters

[in]	section	The section number.
[in]	orientation	The orientation.
[in]	role	The data role.

Returns: The header data as QVariant.

◆ index()

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

override

Returns the model index for the given row and column under the given parent.

Parameters

[in]	row	The row number.
[in]	column	The column number.
[in]	parent	The parent index.

Returns: A valid model index if the position is valid, otherwise an invalid index.

◆ NodeAdded()

void QmitkDataStorageSimpleTreeModel::NodeAdded ( const mitk::DataNode * node )

overridevirtual

Called when a node is added to the data storage.

Parameters

[in] node The node that was added.

Implements QmitkAbstractDataStorageModel.

◆ NodeChanged()

void QmitkDataStorageSimpleTreeModel::NodeChanged ( const mitk::DataNode * node )

overridevirtual

Called when a node in the data storage has changed.

Parameters

[in] node The node that was changed.

Implements QmitkAbstractDataStorageModel.

◆ NodePredicateChanged()

void QmitkDataStorageSimpleTreeModel::NodePredicateChanged ( )

overridevirtual

Called when the node predicate has changed. Rebuilds the tree.

Implements QmitkAbstractDataStorageModel.

◆ NodeRemoved()

void QmitkDataStorageSimpleTreeModel::NodeRemoved ( const mitk::DataNode * node )

overridevirtual

Called when a node is removed from the data storage.

Parameters

[in] node The node that was removed.

Implements QmitkAbstractDataStorageModel.

◆ parent()

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

override

Returns the parent index for the given child.

Parameters

[in] child The child index.

Returns: The parent index, or an invalid index for top-level items.

◆ rowCount()

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

override

Returns the number of child rows under the given parent.

Parameters

[in] parent The parent index.

Returns: The number of children.

◆ setData()

bool QmitkDataStorageSimpleTreeModel::setData	(	const QModelIndex &	index,
		const QVariant &	value,
		int	role = `Qt::EditRole`
	)

override

Sets data at the given index (supports renaming nodes).

Parameters

[in]	index	The model index.
[in]	value	The new value.
[in]	role	The data role.

Returns: True if the data was set successfully.

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

QmitkDataStorageSimpleTreeModel.h

Public Member Functions

Protected Types

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ TreeItem

Constructor & Destructor Documentation

◆ QmitkDataStorageSimpleTreeModel()

◆ ~QmitkDataStorageSimpleTreeModel()

Member Function Documentation

◆ columnCount()

◆ data()

◆ DataStorageChanged()

◆ flags()

◆ headerData()

◆ index()

◆ NodeAdded()

◆ NodeChanged()

◆ NodePredicateChanged()

◆ NodeRemoved()

◆ parent()

◆ rowCount()

◆ setData()