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MAYA-108549: Fix undo crash when switching between target layers in a stage #965

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merged 4 commits into from
Dec 4, 2020
Merged

MAYA-108549: Fix undo crash when switching between target layers in a stage #965

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120ae47
Fix undo/redo crash when switching between layers.
Dec 3, 2020
2981cca
Revert "Fix undo/redo crash when switching between layers."
Dec 4, 2020
a87fc0b
Make sure the USD state delegate is registered for current existing PR.
Dec 4, 2020
677db40
Address feedback. Use a dynamic_cast to determine if a layer is alrea…
Dec 4, 2020
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8 changes: 7 additions & 1 deletion lib/mayaUsd/undo/UsdUndoManager.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,13 @@ UsdUndoManager& UsdUndoManager::instance()

void UsdUndoManager::trackLayerStates(const SdfLayerHandle& layer)
{
layer->SetStateDelegate(UsdUndoStateDelegate::New());
// Check if the layer has already been given a UsdUndoStateDelegate
// if the cast fails that means we need to set a new one.
auto usdUndoStateDelegatePtr
= TfDynamic_cast<UsdUndoStateDelegatePtr>(layer->GetStateDelegate());
if (!usdUndoStateDelegatePtr) {
layer->SetStateDelegate(UsdUndoStateDelegate::New());
}
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@ppt-adsk Thanks for great feedback. Using a dynamic_cast to determine if a layer is already registered with our UsdUndoStateDelegate. If the cast fails, that means it needs to be set with a new one. The UsdUndoStateDelegate is stateless and doesn't need to be shared among layers.

}

void UsdUndoManager::addInverse(InvertFunc func)
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