Copies data from parent model to child model regarding relation key. More...

#include <RelationKeyCopier.h>

Public Member Functions
void	setParentModel (QAbstractItemModel *model)
	Set parent model. More...

void	setChildModel (QAbstractItemModel *model)
	Set child model. More...

void	addColumnPair (int parentModelColumn, int childModelColumn)
	Add a pair of columns. More...

void	setKey (const PrimaryKey &parentModelPk, const ForeignKey &childModelFk)
	Set relation key from parent model primary key and child model foreign key. More...

void	setKey (const RelationKey &key)
	Set relation key. More...

RelationKey	key () const
	Get relation key.

int	parentModelCurrentRow () const
	Get parent model current row.

bool	copyAllKeyData (RowRange childModelRowRange, const QModelIndex &parent=QModelIndex())
	Copy all key data from parent model to child model for given row range for child model. More...

bool	copyKeyData (const RowList &childModelRowList, ColumnRange parentModelColumnRange)
	Copy key data from parent model to child model. More...

void	setParentModelCurrentRow (int row)
	Set current row in parent model. More...

Detailed Description

Copies data from parent model to child model regarding relation key.

Keep models and relation key coherent: There is no good solution for RelationKeyCopier to check if relation key is valid, regarding models, in a reliable way. The user of this class should take care of this. When setting parent model, child model, and relation key, no check will be done about columns that are to big regarding models. Then processing the copy, out of bound check is done, and nothing happens for a pair of columns when at least one is in invalid range. This also alows to change models and relation key at any time.

Definition at line 52 of file RelationKeyCopier.h.

Member Function Documentation

void Mdt::ItemModel::RelationKeyCopier::addColumnPair	(	int	parentModelColumn,
		int	childModelColumn
	)

Add a pair of columns.

Precondition: parentModelColumn must be >= 0; childModelColumn must be >= 0

Definition at line 48 of file RelationKeyCopier.cpp.

bool Mdt::ItemModel::RelationKeyCopier::copyAllKeyData	(	RowRange	childModelRowRange,
		const QModelIndex &	parent = `QModelIndex()`
	)

Copy all key data from parent model to child model for given row range for child model.

Todo:: Define and fix preconditions

Definition at line 72 of file RelationKeyCopier.cpp.

bool Mdt::ItemModel::RelationKeyCopier::copyKeyData	(	const RowList &	childModelRowList,
		ColumnRange	parentModelColumnRange
	)

Copy key data from parent model to child model.

Will only affect rows from childModelRowList in child model. Will also only copy data that exists in key regarding parentModelColumnRange .

Todo:: Define and fix preconditions

Definition at line 95 of file RelationKeyCopier.cpp.

void Mdt::ItemModel::RelationKeyCopier::setChildModel ( QAbstractItemModel * model )

Set child model.

RelationKeyCopier will not own the model (it will not delete it).

Precondition: model must be a valid pointer

Definition at line 41 of file RelationKeyCopier.cpp.

void Mdt::ItemModel::RelationKeyCopier::setKey	(	const PrimaryKey &	parentModelPk,
		const ForeignKey &	childModelFk
	)

Set relation key from parent model primary key and child model foreign key.

Precondition: parentModelPk must not be null; childModelFk must not be null; Both parentModelPk and childModelFk must have the same count of column indexes

Definition at line 56 of file RelationKeyCopier.cpp.

void Mdt::ItemModel::RelationKeyCopier::setKey ( const RelationKey & key )

Set relation key.

Precondition: key must not be null

Definition at line 65 of file RelationKeyCopier.cpp.

void Mdt::ItemModel::RelationKeyCopier::setParentModel ( QAbstractItemModel * model )

Set parent model.

Will also set parent model current row to -1.

RelationKeyCopier will not own the model (it will not delete it).

Precondition: model must be a valid pointer

Definition at line 33 of file RelationKeyCopier.cpp.

void Mdt::ItemModel::RelationKeyCopier::setParentModelCurrentRow ( int row )

Set current row in parent model.

If parent model was not set, this slot does nothing.

Precondition: If parent model is valid, row must be in range -1 <= row < parentModel->rowCount()

Definition at line 113 of file RelationKeyCopier.cpp.

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

libs/ItemModel/src/Mdt/ItemModel/RelationKeyCopier.h
libs/ItemModel/src/Mdt/ItemModel/RelationKeyCopier.cpp

Public Member Functions

Detailed Description

Member Function Documentation