CmdHistory Class Reference

#include <command.h>

Inheritance diagram for CmdHistory:

List of all members.

Public Member Functions
	CmdHistory ()
	~CmdHistory ()
CmdHistory &	operator<< (Cmd *pCmd)
int	undoAvailable () const
	How many undo step is available.
bool	canUndo () const
	True if undo is possible.
bool	canRedo () const
	True if redo is possible.
void	rollBack ()
	Cancel last operation. Needed if command crashes during execution.
void	undo ()
	Undo last command.
void	redo ()
	Undo last undo.
bool	needSave ()
	True if image has changed since last saving.
void	setSaved ()
	May be called when document is saved.
void	startMacro ()
MacroCmd *	createMacroCmd ()
Classes
class	ErrUnderflow

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Detailed Description

Class maintaing command history and macro recording. This is one of base classes for Image class.

Definition at line 188 of file command.h.

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Constructor & Destructor Documentation

CmdHistory::CmdHistory

(

)

CmdHistory::~CmdHistory

(

)

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Member Function Documentation

CmdHistory& CmdHistory::operator<<

(

Cmd *

pCmd

)

Put command to history list. *pCmd object must by allocated on the heap and can never be destroyed. CmdHistory destroys it.

Parameters:

pCmd

Pointer to command.

Returns:

Reference to this. Needed for << operator concatenation.

Reimplemented in Image.

Referenced by Image::operator<<().

int CmdHistory::undoAvailable

(

)

const

How many undo step is available.

bool CmdHistory::canUndo

(

)

const

True if undo is possible.

bool CmdHistory::canRedo

(

)

const

True if redo is possible.

void CmdHistory::rollBack

(

)

Cancel last operation. Needed if command crashes during execution.

void CmdHistory::undo

(

)

Undo last command.

void CmdHistory::redo

(

)

Undo last undo.

bool CmdHistory::needSave

(

)

True if image has changed since last saving.

void CmdHistory::setSaved

(

)

May be called when document is saved.

void CmdHistory::startMacro

(

)

Start macro loading.

MacroCmd* CmdHistory::createMacroCmd

(

)

Create new macro. Note that startMacro method should be called first.

Returns:

Return pointer to on heap allocated MacroCmd.

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

• command.h

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