image_view.h

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/**
 * @author Nikita Mochalov (github.com/tralf-strues)
 * @file image_view.h
 * @date 2021-11-06
 * 
 * @copyright Copyright (c) 2021
 */
 
#pragma once
 
#include "component.h"
#include "../media/image.h"
 
namespace Sgl
{
    class ImageView final : public Component
    {
    public:
        ImageView(Image* image = nullptr, bool preserveRatio = false);
        virtual ~ImageView() override = default;
 
        virtual Component* getHitComponent(int32_t x, int32_t y) override;
        virtual void render(const Sml::Rectangle<int32_t>& targetRegion) override;
        virtual void layout() override;
        virtual void prerender() override;
        virtual bool isResizable() const override;
 
        const Image* getImage() const;
        void setImage(const Image* image);
 
        float getRatio() const;
 
        bool getPreserveRatio() const;
        void setPreserveRatio(bool preserveRatio);
 
        int32_t getFitWidth() const;
        void setFitWidth(int32_t width);
 
        int32_t getFitHeight() const;
        void setFitHeight(int32_t height);
 
        virtual int32_t computePrefWidth(int32_t height = -1) const override;
        virtual int32_t computePrefHeight(int32_t width = -1) const override;
        
        virtual int32_t computeMinWidth(int32_t height = -1) const override;
        virtual int32_t computeMinHeight(int32_t width = -1) const override;
 
        virtual int32_t computeMaxWidth(int32_t height = -1) const override;
        virtual int32_t computeMaxHeight(int32_t width = -1) const override;
 
    private:
        const Image* m_Image         = nullptr;
 
        bool         m_PreserveRatio = true;
        int32_t      m_FitWidth      = USE_COMPUTED_SIZE;
        int32_t      m_FitHeight     = USE_COMPUTED_SIZE;
    };
};