Hi Pedro,
if you want to use the undo/redo mechanism then you will have to create
appropriate operations. One for actually doing the stuff you want to do and one
"negative" operation which exactly reverts the previous one. Examples of how to
use the undo/redo in MITK can be found on many places in our source code. Most
of the 2D segmentation tools are using the undo/redo although the support is
somehow limited. E.g. the 3D interpolation currently does not react to
undo/redo.
You can find an example in the mitkOverwriteSliceImageFilter line 123:
if ( m_CreateUndoInformation )
{
// create do/undo operations (we don't execute the doOp here, because it
has already been executed during calculation of the diff image
ApplyDiffImageOperation* doOp = new ApplyDiffImageOperation( OpTEST,
const_cast<Image*>(input.GetPointer()), m_SliceDifferenceImage, m_TimeStep,
m_SliceDimension, m_SliceIndex );
ApplyDiffImageOperation* undoOp = new ApplyDiffImageOperation( OpTEST,
const_cast<Image*>(input.GetPointer()), m_SliceDifferenceImage, m_TimeStep,
m_SliceDimension, m_SliceIndex );
undoOp->SetFactor( -1.0 );
OperationEvent* undoStackItem = new OperationEvent(
DiffImageApplier::GetInstanceForUndo(), doOp, undoOp,
this->EventDescription(m_SliceDimension, m_SliceIndex, m_TimeStep) );
UndoController::GetCurrentUndoModel()->SetOperationEvent( undoStackItem );
}
In this case a difference image has to be created.
Best regards
Andreas
From: Pedro Cardoso [mailto:[email protected]]
Sent: Dienstag, 27. August 2013 22:05
To: [email protected]
Subject: [mitk-users] Undo Controller
Hi,
can someone explain me how can I use the mitkUndoController? I've looked into
the Interaction and Undo/Redo Concepts
(http://docs.mitk.org/nightly-qt4/InteractionPage.html), but I can't really
understand how can I use the undo controller. Also, I'd like to know if the
undo controller also works with the mitk tools
Thanks in advance.
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