SWindowTitleBarArea.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "Layout/Margin.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Input/Reply.h"
#include "Widgets/SWidget.h"
#include "Layout/Children.h"
#include "Widgets/SPanel.h"
#include "Widgets/SBoxPanel.h"
#include "Styling/SlateTypes.h"
#include "Widgets/Input/SButton.h"
 
 
class FArrangedChildren;
class FPaintArgs;
class FSlateWindowElementList;
class SWindow;
 
template< typename ObjectType > class TAttribute;
 
class SWindowTitleBarArea
    : public SPanel
{
public:
    
    using FSlot = FSingleWidgetChildrenWithBasicLayoutSlot;
 
    SLATE_BEGIN_ARGS(SWindowTitleBarArea)
        : _HAlign( HAlign_Fill )
        , _VAlign( VAlign_Fill )
        , _Padding( 0.0f )
        , _Content()
        { }
 
        SLATE_ARGUMENT( EHorizontalAlignment, HAlign )
 
        
        SLATE_ARGUMENT( EVerticalAlignment, VAlign )
 
        
        SLATE_ATTRIBUTE( FMargin, Padding )
 
        
        SLATE_DEFAULT_SLOT( FArguments, Content )
 
        
        SLATE_EVENT( FSimpleDelegate, RequestToggleFullscreen )
 
    SLATE_END_ARGS()
 
    SLATE_API SWindowTitleBarArea();
    SLATE_API virtual ~SWindowTitleBarArea();
 
    SLATE_API void Construct( const FArguments& InArgs );
 
    SLATE_API virtual FVector2D ComputeDesiredSize(float) const override;
    SLATE_API virtual void OnArrangeChildren( const FGeometry& AllottedGeometry, FArrangedChildren& ArrangedChildren ) const override;
    SLATE_API virtual FChildren* GetChildren() override;
    SLATE_API virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override;
 
    SLATE_API virtual FReply OnMouseButtonDoubleClick(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
 
    SLATE_API virtual EWindowZone::Type GetWindowZoneOverride() const override;
 
    SLATE_API void SetContent(const TSharedRef< SWidget >& InContent);
 
    SLATE_API void SetHAlign(EHorizontalAlignment HAlign);
 
    SLATE_API void SetVAlign(EVerticalAlignment VAlign);
 
    SLATE_API void SetPadding(TAttribute<FMargin> InPadding);
 
    void SetGameWindow(TSharedPtr<SWindow> Window)
    {
        GameWindow = Window;
    }
 
    void SetRequestToggleFullscreenCallback(FSimpleDelegate InRequestToggleFullscreen)
    {
        RequestToggleFullscreen = InRequestToggleFullscreen;
    }
 
    static void SetOnCloseButtonClickedDelegate(FSimpleDelegate InOnCloseCuttonClicked)
    {
        OnCloseButtonClicked = InOnCloseCuttonClicked;
    }
 
    static void SetIsCloseButtonActive(bool bIsAcive)
    {
        bIsCloseButtonActive = bIsAcive;
    }
 
    void SetWindowButtonsVisibility(bool bIsVisible)
    {
        WindowButtonsBox->SetVisibility(bIsVisible && PLATFORM_DESKTOP ? EVisibility::Visible : EVisibility::Collapsed);
    }
 
    static void SetCustomStyleForWindowButtons(const FButtonStyle& InMinimizeButtonStyle, const FButtonStyle& InMaximizeButtonStyle, const FButtonStyle& InRestoreButtonStyle, const FButtonStyle& InCloseButtonStyle)
    {
        MinimizeButtonStyle = InMinimizeButtonStyle;
        MaximizeButtonStyle = InMaximizeButtonStyle;
        RestoreButtonStyle = InRestoreButtonStyle;
        CloseButtonStyle = InCloseButtonStyle;
    }
 
protected:
 
    FSlot ChildSlot;
 
private:
 
    TSharedPtr<SWindow> GameWindow;
    FSimpleDelegate RequestToggleFullscreen;
 
    static SLATE_API FSimpleDelegate OnCloseButtonClicked;
    static SLATE_API bool bIsCloseButtonActive;
 
    static SLATE_API FButtonStyle MinimizeButtonStyle;
    static SLATE_API FButtonStyle MaximizeButtonStyle;
    static SLATE_API FButtonStyle RestoreButtonStyle;
    static SLATE_API FButtonStyle CloseButtonStyle;
 
    bool bIsMinimizeButtonEnabled;
    bool bIsMaximizeRestoreButtonEnabled;
    bool bIsCloseButtonEnabled;
 
    SLATE_API FReply MinimizeButton_OnClicked();
    SLATE_API FReply MaximizeRestoreButton_OnClicked();
    SLATE_API FReply CloseButton_OnClicked();
 
    SLATE_API const FSlateBrush* GetMinimizeImage() const;
    SLATE_API const FSlateBrush* GetMaximizeRestoreImage() const;
    SLATE_API const FSlateBrush* GetCloseImage() const;
 
    TSharedPtr<SButton> MinimizeButton;
    TSharedPtr<SButton> MaximizeRestoreButton;
    TSharedPtr<SButton> CloseButton;
 
    TSharedPtr<SVerticalBox> WindowButtonsBox;
};