SArticyObjectAssetPicker.h

//  
// Copyright (c) 2023 articy Software GmbH & Co. KG. All rights reserved.  
//
 
#pragma once
 
#include "CoreMinimal.h"
#include "ContentBrowserDelegates.h"
#include "ArticyObject.h"
#include <Widgets/SCompoundWidget.h>
#include <Widgets/Views/STableViewBase.h>
#include <Widgets/Views/STableRow.h>
#include <IContentBrowserSingleton.h>
#include <SAssetSearchBox.h>
#include <Types/SlateEnums.h>
#include <Misc/TextFilterExpressionEvaluator.h>
#include "Widgets/Input/SComboButton.h"
#include "Slate/ArticyFilterHelpers.h"
#include "ClassViewerModule.h"
 
#define LOCTEXT_NAMESPACE "ArticyObjectAssetPicker"
 
namespace FArticyObjectAssetPicketConstants {

    const FVector2D TileSize(96.f, 96.f);
    const int32 ThumbnailPadding = 2;
 
}

class ARTICYEDITOR_API SArticyObjectAssetPicker : public SCompoundWidget
{
public:
    SLATE_BEGIN_ARGS(SArticyObjectAssetPicker) :
        _CurrentClassRestriction(UArticyObject::StaticClass()),
        _TopLevelClassRestriction(UArticyObject::StaticClass()),
        _bExactClass(false),
        _bExactClassEditable(true),
        _bClassFilterEditable(true)
        {}
        SLATE_EVENT(FOnAssetSelected, OnArticyObjectSelected)
        SLATE_ARGUMENT(UClass*, CurrentClassRestriction)
        SLATE_ATTRIBUTE(UClass*, TopLevelClassRestriction)
        SLATE_ATTRIBUTE(bool, bExactClass)
        SLATE_ATTRIBUTE(bool, bExactClassEditable)
        SLATE_ATTRIBUTE(bool, bClassFilterEditable)
        SLATE_EVENT(FOnClassPicked, OnClassPicked)
    SLATE_END_ARGS()
 
    ~SArticyObjectAssetPicker();

    void Construct(const FArguments& InArgs);

    virtual void Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime) override;

    void RequestSlowFullListRefresh();

    void SelectAsset(TWeakObjectPtr<UArticyObject> AssetItem, ESelectInfo::Type SelectInfo) const;
 
private:
    void CreateInternalWidgets();

    void OnCopyProperty(FArticyId Id) const;

    TSharedRef<SWidget> CreateClassPicker();

    void OnExactClassCheckBoxChanged(ECheckBoxState NewState);

    void OnClassPicked_Func(UClass* InChosenClass);

    FText GetChosenClassName() const;

    TSharedRef<class ITableRow> MakeTileViewWidget(TWeakObjectPtr<UArticyObject> Entity, const TSharedRef<STableViewBase>& OwnerTable) const;

    float GetTileViewHeight() const;

    float GetTileViewWidth() const;

    void OnClear() const;

    void OnSearchBoxChanged(const FText& InSearchText) const;

    void OnSearchBoxCommitted(const FText& InSearchText, ETextCommit::Type CommitInfo) const;

    void RefreshSourceItems();

    void SetSearchBoxText(const FText& InSearchText) const;

    void OnFrontendFiltersChanged();

    bool TestAgainstFrontendFilters(const FAssetData& Item) const;

    EActiveTimerReturnType FocusSearchField(double InCurrentTime, float InDeltaTime) const;
 
private: // Slate Attributes
    FOnAssetSelected OnAssetSelected; 
    FOnClassPicked OnClassPicked; 
    TAttribute<UClass*> TopLevelClassRestriction; 
    UClass* CurrentClassRestriction = nullptr; 
    TAttribute<bool> bExactClass; 
    TAttribute<bool> bExactClassEditable; 
    TAttribute<bool> bClassFilterEditable; 
 
private: // Widgets
    TSharedPtr<SAssetSearchBox> SearchField; 
    TSharedPtr<SWidget> AssetViewContainer; 
    TSharedPtr<SListView<TWeakObjectPtr<UArticyObject>>> AssetView; 
    TSharedPtr<SHorizontalBox> FilterBox; 
    TSharedPtr<SComboButton> ClassFilterButton; 
 
private: // Internal Data
    TSharedPtr<FArticyObjectFilterCollectionType> FrontendFilters; 
    TSharedPtr<FArticyClassRestrictionFilter> ClassFilter; 
    TSharedPtr<FFrontendFilter_ArticyObject> ArticyObjectFilter; 
 
    TArray<FAssetData> ArticyPackageDataAssets; 
    TArray<TWeakObjectPtr<UArticyObject>> FilteredObjects; 
    bool bSlowFullListRefreshRequested = false; 
};
 
#undef LOCTEXT_NAMESPACE