SExpandableButton.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "Layout/Visibility.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Framework/SlateDelegates.h"
#include "Widgets/Layout/SBorder.h"
 
class SExpandableButton
    : public SBorder
{
    SLATE_DECLARE_WIDGET_API(SExpandableButton, SBorder, SLATE_API)
 
public:
 
    SLATE_BEGIN_ARGS( SExpandableButton )
        : _IsExpanded( true )
        {}
 
        SLATE_ATTRIBUTE( FText, CollapsedText )
 
        
        SLATE_ATTRIBUTE( FText, ExpandedText )
 
        
        SLATE_NAMED_SLOT( FArguments, CollapsedButtonContent )
 
        
        SLATE_NAMED_SLOT( FArguments, ExpandedButtonContent )
 
        
        SLATE_NAMED_SLOT( FArguments, ExpandedChildContent )
 
        
        SLATE_EVENT( FOnClicked, OnExpansionClicked )
 
        
        SLATE_EVENT( FOnClicked, OnCloseClicked )
 
        
        SLATE_ATTRIBUTE( bool, IsExpanded )
 
    SLATE_END_ARGS()
 
    SLATE_API SExpandableButton();
    SLATE_API void Construct(const FArguments& InArgs);
 
protected:
 
    SLATE_API EVisibility GetCollapsedVisibility() const;
    SLATE_API EVisibility GetExpandedVisibility() const;
 
    SLATE_API void UpdateVisibility();
 
private:
 
    TSlateAttribute<bool> IsExpanded;
 
    TSharedPtr<SWidget> ExpandedChildContent;
    TSharedPtr<SWidget> ToggleButtonClosed;
    TSharedPtr<SWidget> ToggleButtonExpanded;
    TSharedPtr<SWidget> CloseExpansionButton;
};