SArticyIdProperty.h

//  
// Copyright (c) 2023 articy Software GmbH & Co. KG. All rights reserved.  
//
 
#pragma once
 
#include "CoreMinimal.h"
#include "Widgets/Input/SComboButton.h"
#include "Widgets/Layout/SBorder.h"
#include "Slate/AssetPicker/SArticyObjectTileView.h"
#include "PropertyHandle.h"
#include "Customizations/ArticyEditorCustomizationManager.h"
#include "Widgets/Layout/SBox.h"
#include "Widgets/Input/SButton.h"
#include "ContentBrowserDelegates.h"
#include "AssetPicker/SArticyObjectAssetPicker.h"
 
namespace ArticyRefPropertyConstants
{
    const FVector2D ThumbnailSize(64, 64);
    const FMargin ThumbnailPadding(2, 2);
}

class SFixedSizeMenuComboButton : public SComboButton
{
protected:
    virtual void Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime) override;
};

class ARTICYEDITOR_API SArticyIdProperty : public SCompoundWidget
{
public:
 
    SLATE_BEGIN_ARGS(SArticyIdProperty)
        : _ArticyIdToDisplay(FArticyId())
        , _TopLevelClassRestriction(UArticyObject::StaticClass())
        , _HighExtender(nullptr)
        , _CopyAction()
        , _PasteAction()
        , _bExactClass(false)
        , _bExactClassEditable(true)
        , _bIsReadOnly(false)
        {}
        SLATE_ATTRIBUTE(FArticyId, ArticyIdToDisplay)
        SLATE_EVENT(FOnArticyIdChanged, OnArticyIdChanged)
        SLATE_ATTRIBUTE(UClass*, TopLevelClassRestriction)
        SLATE_ARGUMENT(TSharedPtr<FExtender>, HighExtender)
        SLATE_ARGUMENT(FUIAction, CopyAction)
        SLATE_ARGUMENT(FUIAction, PasteAction)
        SLATE_ATTRIBUTE(bool, bExactClass)
        SLATE_ATTRIBUTE(bool, bExactClassEditable)
        SLATE_ATTRIBUTE(bool, bIsReadOnly)
    SLATE_END_ARGS()
 
    
    void Construct(const FArguments& InArgs);

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

    void CreateInternalWidgets();
 
private:
    TAttribute<FArticyId> ArticyIdToDisplay;
    FOnArticyIdChanged OnArticyIdChanged;
    TAttribute<UClass*> TopLevelClassRestriction;
    TAttribute<bool> bExactClass;
    TAttribute<bool> bExactClassEditable;
    TAttribute<bool> bIsReadOnly;
 
    // the articy object this widget currently represents
    TWeakObjectPtr<UArticyObject> CachedArticyObject = nullptr;
    mutable FArticyId CachedArticyId = FArticyId();
 
    TSharedPtr<SHorizontalBox> ChildBox;
    TSharedPtr<SArticyObjectTileView> TileView;
    TSharedPtr<SBox> TileContainer;
    TSharedPtr<SBorder> ThumbnailBorder;
    TSharedPtr<FSlateBrush> ImageBrush;
    TSharedPtr<SWidget> ComboButton;
    TSharedPtr<SHorizontalBox> CustomizationButtonBox_High;
    TSharedPtr<SHorizontalBox> CustomizationButtonBox_Low;
 
private:
    void Update(const FArticyId& NewId);

    void UpdateWidget();

    void ApplyArticyRefCustomization(const FArticyIdPropertyWidgetCustomizationInfo& Customization);

    void ApplyArticyRefCustomizations(const TArray<FArticyIdPropertyWidgetCustomizationInfo>& Customizations);
 
private:
    TSharedRef<SWidget> CreateArticyObjectAssetPicker();

    bool IsClassFilterEditable() const;

    void OnArticyObjectPicked(const FAssetData& ArticyObjectData) const;

    FReply OnArticyButtonClicked() const;

    FReply OnAssetThumbnailDoubleClick(const FGeometry& InMyGeometry, const FPointerEvent& InMouseEvent) const;

    FText OnGetArticyObjectDisplayName() const;

    FArticyId GetCurrentObjectID() const;

    bool CanActivate() const { return !bIsReadOnly.Get(); }

    void OnCopyProperty() const;

    void OnPasteProperty();

    bool CanPasteProperty() const;
 
private:
    FUIAction CopyAction;
    FUIAction PasteAction;
    TArray<TSharedPtr<IArticyIdPropertyWidgetCustomization>> ActiveCustomizations;
 
    TSharedPtr<FExtender> CustomizationHighExtender;
    TArray<TSharedPtr<FExtender>> ArticyIdCustomizationExtenders;
 
};