UpdateCommand Class Reference

Undo command for property changes (label, color, frequency, appearance, etc.). More...

#include <Commands.h>

Inheritance diagram for UpdateCommand:

Public Member Functions
void	redo () override
	Applies the new property values.
void	undo () override
	Restores the old property values.
	UpdateCommand (const QList< GraphicElement * > &elements, const QByteArray &oldData, Scene *scene, QUndoCommand *parent=nullptr)
	Constructs the command.

Additional Inherited Members
Protected Member Functions inherited from ElementsCommand
QList< GraphicElement * >	elements () const
	Returns the live element pointers for this command's targets, looked up by stored ID.
	ElementsCommand (const QList< GraphicElement * > &elements, Scene *scene, QUndoCommand *parent=nullptr)
Protected Attributes inherited from ElementsCommand
QList< int >	m_ids
Scene *	m_scene

Detailed Description

Undo command for property changes (label, color, frequency, appearance, etc.).

Captures the pre-change state in oldData; the post-change state is serialized from the elements at construction time.

Definition at line 192 of file Commands.h.

Constructor & Destructor Documentation

UpdateCommand()

UpdateCommand::UpdateCommand ( const QList< GraphicElement * > & elements, const QByteArray & oldData, Scene * scene, QUndoCommand * parent = nullptr )

explicit

Constructs the command.

Parameters

elements	Elements whose properties changed.
oldData	Serialized state before the change.
scene	Target scene.
parent	Optional parent undo command.

Definition at line 427 of file Commands.cpp.

References ElementsCommand::elements(), ElementsCommand::ElementsCommand(), InMemorySnapshot, ElementsCommand::m_scene, and Serialization::writePandaHeader().

Member Function Documentation

redo()

void UpdateCommand::redo ( )

override

Applies the new property values.

Definition at line 471 of file Commands.cpp.

References ElementsCommand::m_scene, and qCDebug.

undo()

void UpdateCommand::undo ( )

override

Restores the old property values.

Definition at line 460 of file Commands.cpp.

References ElementsCommand::m_scene, and qCDebug.

---

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

• Commands.h
• Commands.cpp