UILayer.hpp

Go to the documentation of this file.

//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2023 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "CeresEngine/UI/Forward.hpp"
#include "CeresEngine/UI/UIUtility.hpp"
 
#include "CeresEngine/Foundation/SmartPtr.hpp"
#include "CeresEngine/Foundation/Container/Vector.hpp"
 
namespace CeresEngine {
 
    class UILayer : public RefCounted<UILayer> {
    private:
        UILayer* mSuperLayer;
        Vector<UILayerPtr> mSubLayers;
 
        UIPoint mAnchorPoint;
        UIPoint mPosition;
 
        UIRect mBounds;
        UIRect mFrame;
 
        double mOpacity = 1.0;
        bool mOpaque = true;
 
        AffineTransform mTransform;
        AffineTransform mSubLayerTransform;
 
        UIBackingStorePtr mBackingStore;
 
    public:
        UILayer() noexcept = default;
        virtual ~UILayer() noexcept = default;
 
    public: // Hierarchy
        [[nodiscard]] UILayer* getSuperLayer() const noexcept { return mSuperLayer; }
        [[nodiscard]] const Vector<UILayerPtr>& getSubLayers() const noexcept { return mSubLayers; }
 
        void addSublayer(UILayer* layer);
        void replaceSublayer(UILayer* layer, UILayer* other);
        void removeFromSuperlayer();
 
    public: // Displaying & rendering
        void display(UIGraphicsContext& context);
        void displayIfNeeded(UIGraphicsContext& context);
        virtual void draw(UIGraphicsContext& context);
 
        bool getNeedsDisplay();
        void setNeedsDisplay();
        void setNeedsDisplay(const UIRect& rect);
    };
 
    using UILayerPtr = RC<UILayer>;
 
    class UILayerContext final {
    private:
        UILayerPtr mLayer;
 
    public:
        void render(UIGraphicsContext& context);
    };
 
} // namespace CeresEngine