lc::UndoManagerImpl Class Reference

#include <undomanagerimpl.h>

Inheritance diagram for lc::UndoManagerImpl:

Collaboration diagram for lc::UndoManagerImpl:

Public Member Functions
	UndoManagerImpl (unsigned int maximumUndoLevels)
virtual void	redo ()
	redo an operation. More...
virtual void	undo ()
	undo an operation. More...
virtual bool	canUndo () const
	Check if undo can be done. More...
virtual bool	canRedo () const
	Check if redo can be done. More...
virtual void	removeUndoables ()
	Clears the Undo/Redo stack. More...
void	on_CommitProcessEvent (const lc::CommitProcessEvent &event)

Private Attributes
std::vector < operation::Undoable_SPtr >	_unDoables
	Undo list. More...
std::stack < operation::Undoable_SPtr >	_reDoables
	Redo stack. More...
const unsigned int	_maximumUndoLevels
	Maximum undo level. More...

Detailed Description

UndoManagerImpl manages a stack of operations and allows for undo or re-do operations that where done on a canvas

Parameters

maximumUndoLevels

Definition at line 19 of file undomanagerimpl.h.

Constructor & Destructor Documentation

UndoManagerImpl::UndoManagerImpl

(

unsigned int

maximumUndoLevels

)

Definition at line 10 of file undomanagerimpl.cpp.

                                                               : _maximumUndoLevels(maximumUndoLevels) {

}

Member Function Documentation

bool UndoManagerImpl::canRedo ( ) const

virtual

Check if redo can be done.

See also

lc::Undoable

lc::UndoManager

lc::UndoManagerImpl

Returns

Implements lc::UndoManager.

Definition at line 60 of file undomanagerimpl.cpp.

                                    {
    return !_reDoables.empty();
}

bool UndoManagerImpl::canUndo ( ) const

virtual

Check if undo can be done.

See also

lc::Undoable

lc::UndoManager

lc::UndoManagerImpl

Returns

Implements lc::UndoManager.

Definition at line 63 of file undomanagerimpl.cpp.

                                    {
    return !_unDoables.empty();
}

void UndoManagerImpl::on_CommitProcessEvent

(

const lc::CommitProcessEvent &

event

)

Definition at line 15 of file undomanagerimpl.cpp.

                                                                           {
    operation::Undoable_SPtr undoable = std::dynamic_pointer_cast<operation::Undoable>(event.operation());

    if (undoable.get() != nullptr) {
        // // LOG4CXX_DEBUG(logger, "Process: " + undoable->text());

        // Check if Redo is possible, if so we might need to purge objects from memory
        // as long as we can redo, purge these objects
        while (canRedo()) {
            operation::Undoable_SPtr undoable = _reDoables.top();
            _reDoables.pop();
            // Need to get a list of absolete entities, they are all entities that are created in the _reDoables list
            // document()->absolueteEntity(entity);
        }

        // Add undoable to stack
        _unDoables.push_back(undoable);

        // Remove old undoables
        if (_unDoables.size() > this->_maximumUndoLevels) {
            // Need to get a list of absolete entities, they are all entities that are delete in the _unDoables list
            // document()->absolueteEntity(entity);
            _unDoables.erase(_unDoables.begin(), _unDoables.begin() + 1);
        }
    }
}

void UndoManagerImpl::redo ( )

virtual

redo an operation.

See also

lc::Undoable

lc::UndoManager

lc::UndoManagerImpl

Implements lc::UndoManager.

Definition at line 43 of file undomanagerimpl.cpp.

                           {
    if (canRedo()) {
        operation::Undoable_SPtr undoable = _reDoables.top();
        _reDoables.pop();
        undoable->redo();
        _unDoables.push_back(undoable);
    }
}

void UndoManagerImpl::removeUndoables ( )

virtual

Clears the Undo/Redo stack.

See also

lc::Undoable

lc::UndoManager

lc::UndoManagerImpl

Returns

Implements lc::UndoManager.

Definition at line 67 of file undomanagerimpl.cpp.

                                      {
    _unDoables.clear();

    while (!_reDoables.empty()) {
        _reDoables.pop();
    }
}

void UndoManagerImpl::undo ( )

virtual

undo an operation.

See also

lc::Undoable

lc::UndoManager

lc::UndoManagerImpl

Implements lc::UndoManager.

Definition at line 51 of file undomanagerimpl.cpp.

                           {
    if (canUndo()) {
        operation::Undoable_SPtr undoable = _unDoables.back();
        _unDoables.pop_back();
        undoable->undo();
        _reDoables.push(undoable);
    }
}

Member Data Documentation

const unsigned int lc::UndoManagerImpl::_maximumUndoLevels

private

Maximum undo level.

Definition at line 67 of file undomanagerimpl.h.

std::stack<operation::Undoable_SPtr> lc::UndoManagerImpl::_reDoables

private

Redo stack.

Definition at line 66 of file undomanagerimpl.h.

std::vector<operation::Undoable_SPtr> lc::UndoManagerImpl::_unDoables

private

Undo list.

Definition at line 65 of file undomanagerimpl.h.

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

• lckernel/cad/dochelpers/undomanagerimpl.h
• lckernel/cad/dochelpers/undomanagerimpl.cpp