Class to support universal undo command sequence for application, basic for. More...

#include <qgsvectorlayerundocommand.h>

Collaboration diagram for QgsUndoCommand:

Classes
class	AttributeChangeEntry
	change structure for attribute for undo/redo purpose More...
class	GeometryChangeEntry
	change structure to geometry for undo/redo purpose More...
Public Types
typedef QMap< int, AttributeChangeEntry >	AttributeChanges
Public Member Functions
	QgsUndoCommand (QgsVectorLayer *layer, QString text)
void	undo ()
	Necessary function to provide undo operation.
void	redo ()
	Necessary function to provide redo operation.
void	storeGeometryChange (QgsFeatureId featureId, QgsGeometry &original, QgsGeometry &target)
	Function to store changes in geometry to be returned to this state after undo/redo.
void	storeAttributeChange (QgsFeatureId featureId, int field, QVariant original, QVariant target, bool isFirstChange)
	Stores changes of attributes for the feature to be returned to this state after undo/redo.
void	storeFeatureDelete (QgsFeatureId featureId)
	Add id of feature to deleted list to be reverted if needed afterwards.
void	storeFeatureAdd (QgsFeature &feature)
	Add new feature to list of new features to be stored for undo/redo operations.
void	storeAttributeAdd (int index, const QgsField &value)
	Add new attribute to list of attributes to be used for attributes of features for undo/redo operations.
void	storeAttributeDelete (int index, const QgsField &orig)
	Add deleted attribute which is to be stored for undo/redo operations.
Private Attributes
bool	mFirstRun
	Variable to disable first run of undo, because it's automaticaly done after push.
QgsVectorLayer *	mLayer
	Layer on which operations should be performed.
QMap< QgsFeatureId, GeometryChangeEntry >	mGeometryChange
	Map of changes of geometry for features it describes changes of geometry.
QMap< QgsFeatureId, AttributeChanges >	mAttributeChange
	Map of changes of atrributes for features which describes changes of attributes.
QgsFeatureIds	mDeletedFeatureIdChange
	Deleted feature IDs which are not commited.
QgsFieldMap	mAddedAttributes
	added attributes fields which are not commited
QgsFieldMap	mDeletedAttributes
	deleted attributes fields which are not commited
QgsFeatureList	mAddedFeatures
	New features which are not commited.
Friends
class	QgsVectorLayer

Detailed Description

Class to support universal undo command sequence for application, basic for.

Definition at line 40 of file qgsvectorlayerundocommand.h.

Member Typedef Documentation

typedef QMap<int, AttributeChangeEntry> QgsUndoCommand::AttributeChanges

Definition at line 53 of file qgsvectorlayerundocommand.h.

Constructor & Destructor Documentation

QgsUndoCommand::QgsUndoCommand	(	QgsVectorLayer *	layer,
		QString	text
	)

Definition at line 60 of file qgsvectorlayerundocommand.cpp.

References mFirstRun, and mLayer.

Member Function Documentation

void QgsUndoCommand::redo ( )

Necessary function to provide redo operation.

Definition at line 68 of file qgsvectorlayerundocommand.cpp.

References mFirstRun, mLayer, and QgsVectorLayer::redoEditCommand().

void QgsUndoCommand::storeAttributeAdd	(	int	index,
		const QgsField &	value
	)

Add new attribute to list of attributes to be used for attributes of features for undo/redo operations.

Parameters:

index	index of attribute which is to be added
value	field description which is to be stored

Definition at line 112 of file qgsvectorlayerundocommand.cpp.

References mAddedAttributes.

Referenced by QgsVectorLayer::addAttribute().

void QgsUndoCommand::storeAttributeChange	(	QgsFeatureId	featureId,
		int	field,
		QVariant	original,
		QVariant	target,
		bool	isFirstChange
	)

Stores changes of attributes for the feature to be returned to this state after undo/redo.

Parameters:

featureId	id of feature for which this chaged is stored
field	field identifier of field which was changed
original	original value of attribute before change
target	target value of attribute after change
isFirstChange	flag if this change is the first one

Definition at line 103 of file qgsvectorlayerundocommand.cpp.

References QgsUndoCommand::AttributeChangeEntry::isFirstChange, mAttributeChange, QgsUndoCommand::AttributeChangeEntry::original, and QgsUndoCommand::AttributeChangeEntry::target.

Referenced by QgsVectorLayer::editAttributeChange().

void QgsUndoCommand::storeAttributeDelete	(	int	index,
		const QgsField &	orig
	)

Add deleted attribute which is to be stored for undo/redo operations.

Parameters:

index	index od attribute definition which is to be deleted
orig	deleted field's description

Definition at line 117 of file qgsvectorlayerundocommand.cpp.

References mDeletedAttributes.

Referenced by QgsVectorLayer::deleteAttribute().

void QgsUndoCommand::storeFeatureAdd ( QgsFeature & feature )

Add new feature to list of new features to be stored for undo/redo operations.

Parameters:

feature feature which is to be added

Definition at line 127 of file qgsvectorlayerundocommand.cpp.

References mAddedFeatures.

Referenced by QgsVectorLayer::editFeatureAdd().

void QgsUndoCommand::storeFeatureDelete ( QgsFeatureId featureId )

Add id of feature to deleted list to be reverted if needed afterwards.

Parameters:

featureId id of feature which is to be deleted

Definition at line 122 of file qgsvectorlayerundocommand.cpp.

References mDeletedFeatureIdChange.

Referenced by QgsVectorLayer::editFeatureDelete().

void QgsUndoCommand::storeGeometryChange	(	QgsFeatureId	featureId,
		QgsGeometry &	original,
		QgsGeometry &	target
	)

Function to store changes in geometry to be returned to this state after undo/redo.

Parameters:

featureId	id of feature edited
original	original geometry of feature which was changed
target	changed geometry which was changed

Definition at line 87 of file qgsvectorlayerundocommand.cpp.

References mGeometryChange.

Referenced by QgsVectorLayer::editGeometryChange().

void QgsUndoCommand::undo ( )

Necessary function to provide undo operation.

Definition at line 81 of file qgsvectorlayerundocommand.cpp.

References mLayer, and QgsVectorLayer::undoEditCommand().

Friends And Related Function Documentation

friend class QgsVectorLayer [friend]

Definition at line 156 of file qgsvectorlayerundocommand.h.

Member Data Documentation

QgsFieldMap QgsUndoCommand::mAddedAttributes [private]

added attributes fields which are not commited

Definition at line 146 of file qgsvectorlayerundocommand.h.

Referenced by QgsVectorLayer::redoEditCommand(), storeAttributeAdd(), and QgsVectorLayer::undoEditCommand().

QgsFeatureList QgsUndoCommand::mAddedFeatures [private]

New features which are not commited.

Note a feature can be added and then changed, therefore the details here can be overridden by mChangedAttributeValues and mChangedGeometries.

Definition at line 154 of file qgsvectorlayerundocommand.h.

Referenced by QgsVectorLayer::redoEditCommand(), storeFeatureAdd(), and QgsVectorLayer::undoEditCommand().

QMap<QgsFeatureId, AttributeChanges> QgsUndoCommand::mAttributeChange [private]

Map of changes of atrributes for features which describes changes of attributes.

Definition at line 137 of file qgsvectorlayerundocommand.h.

Referenced by QgsVectorLayer::redoEditCommand(), storeAttributeChange(), and QgsVectorLayer::undoEditCommand().

QgsFieldMap QgsUndoCommand::mDeletedAttributes [private]

deleted attributes fields which are not commited

Definition at line 149 of file qgsvectorlayerundocommand.h.

Referenced by QgsVectorLayer::redoEditCommand(), storeAttributeDelete(), and QgsVectorLayer::undoEditCommand().

QgsFeatureIds QgsUndoCommand::mDeletedFeatureIdChange [private]

Deleted feature IDs which are not commited.

Note a feature can be added and then deleted again before the change is committed - in that case the added feature would be removed from mAddedFeatures only and *not* entered here.

Definition at line 143 of file qgsvectorlayerundocommand.h.

Referenced by QgsVectorLayer::redoEditCommand(), storeFeatureDelete(), and QgsVectorLayer::undoEditCommand().

bool QgsUndoCommand::mFirstRun [private]

Variable to disable first run of undo, because it's automaticaly done after push.

Definition at line 128 of file qgsvectorlayerundocommand.h.

Referenced by QgsUndoCommand(), and redo().

QMap<QgsFeatureId, GeometryChangeEntry> QgsUndoCommand::mGeometryChange [private]

Map of changes of geometry for features it describes changes of geometry.

Definition at line 134 of file qgsvectorlayerundocommand.h.

Referenced by QgsVectorLayer::redoEditCommand(), storeGeometryChange(), and QgsVectorLayer::undoEditCommand().

QgsVectorLayer* QgsUndoCommand::mLayer [private]

Layer on which operations should be performed.