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This is an improvement on how we diff object details so we can diff in real time and unify several algorithms into one AsyncTreeDifferences is a generic structure that can diff any tree while AsyncDetailViewDiff is a specialization of that for details panels Docs: https://docs.google.com/document/d/1rwY-FtTxq2BVptLaMdpKNpzb4hOSn8efm-Z-cF0fBhE/edit?usp=sharing #rb ben.hoffmann, ben.zeigler, dave.jones #preflight 6437336e0c4277fc0bdc4d8a [CL 25027228 by jordan hoffmann in ue5-main branch]
44 lines
1.8 KiB
C++
44 lines
1.8 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "AsyncTreeDifferences.h"
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#include "DiffUtils.h"
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#include "IDetailsView.h"
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namespace TreeDiffSpecification
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{
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template<>
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bool PROPERTYEDITOR_API AreValuesEqual(const TWeakPtr<FDetailTreeNode>& TreeNodeA, const TWeakPtr<FDetailTreeNode>& TreeNodeB);
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template<>
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bool PROPERTYEDITOR_API AreMatching(const TWeakPtr<FDetailTreeNode>& TreeNodeA, const TWeakPtr<FDetailTreeNode>& TreeNodeB);
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template<>
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void PROPERTYEDITOR_API GetChildren(const TWeakPtr<FDetailTreeNode>& InParent, TArray<TWeakPtr<FDetailTreeNode>>& OutChildren);
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template<>
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bool PROPERTYEDITOR_API ShouldMatchByValue(const TWeakPtr<FDetailTreeNode>& TreeNodeA);
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};
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// asynchronously update a difference tree with changes to details views
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// note: users are expected to call TAsyncTreeDifferences::Tick or TAsyncTreeDifferences::FlushQueue to get accurate data
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class PROPERTYEDITOR_API FAsyncDetailViewDiff : public TAsyncTreeDifferences<TWeakPtr<FDetailTreeNode>>
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{
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public:
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FAsyncDetailViewDiff(TSharedRef<IDetailsView> LeftView, TSharedRef<IDetailsView> RightView);
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// Note: by default this list is not necessarily accurate or exhaustive.
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// if you need a perfectly accurate list, call FlushQueue() first
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void GetPropertyDifferences(TArray<FSingleObjectDiffEntry>& OutDiffEntries) const;
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// execute a method for each node associated with a row in at least one details view
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// method provides current left and right row number
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// returns the number of rows in each details view
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TPair<int32, int32> ForEachRow(const TFunction<ETreeTraverseControl(const TUniquePtr<DiffNodeType>&, int32, int32)>& Method) const;
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private:
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static TAttribute<TArray<TWeakPtr<FDetailTreeNode>>> RootNodesAttribute(TWeakPtr<IDetailsView> DetailsView);
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TWeakPtr<IDetailsView> LeftView;
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TWeakPtr<IDetailsView> RightView;
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};
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