UISlider.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2022 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "Forward.hpp"
 
#include "UIAppearance.hpp"
#include "UIControl.hpp"
#include "UIEvent.hpp"
#include "UIUtility.hpp"
 
#include "CeresEngine/Foundation/Event.hpp"
 
namespace CeresEngine {
 
    class UISlider : public UIControl {
        using super = UIControl;
 
    private:
        double mValue = 0.0;
 
        double mMinimumValue = 0.0;
 
        double mMaximumValue = 1.0;
 
        bool mIsContinuous = true;
 
        UIColor mThumbTintColor;
 
        UIColor mMinimumTrackTintColor;
 
        UIColor mMaximumTrackTintColor;
 
    public:
        Event<void(double)> didChangeValue;
 
    public:
        UISlider();
        ~UISlider() override;
 
    public:
        double getValue() const { return mValue; }
 
        void setValue(double value);
 
        double getMinimumValue() const { return mMinimumValue; }
 
        void setMinimumValue(double minimumValue);
 
        double getMaximumValue() const { return mMaximumValue; }
 
        void setMaximumValue(double maximumValue);
 
        bool isContinuous() const { return mIsContinuous; }
 
        void setContinuous(bool isContinuous);
 
        UIColor getThumbTintColor() const { return mThumbTintColor; }
 
        void setThumbTintColor(UIColor thumbTintColor);
 
        UIColor getMinimumTrackTintColor() const { return mMinimumTrackTintColor; }
 
        void setMinimumTrackTintColor(UIColor minimumTrackTintColor);
 
        UIColor getMaximumTrackTintColor() const { return mMaximumTrackTintColor; }
 
        void setMaximumTrackTintColor(UIColor maximumTrackTintColor);
 
    protected:
        double clamp(double value) const;
 
        virtual UIRect calcThumbRect(const UIRect& bounds) const;
 
    public: // UIView
        [[nodiscard]] bool needsPanelToBecomeKey() const override { return true; }
 
        UISize getIntrinsicContentSize() const override;
 
        void draw(UIGraphicsContext& context, const UIRect& dirtyRect) override;
 
    public: // UIResponder
        void keyDown(const UIKeyEvent& event) override;
 
        void mouseDown(const UIMouseEvent& event) override;
 
        void mouseDragged(const UIMouseEvent& event) override;
 
        void scrollWheel(const UIMouseEvent& event) override;
 
    public: // Appearance properties
        static const UIColorAppearanceProperty startingShadowColorProperty;
        static const UIColorAppearanceProperty endingShadowColorProperty;
        static const UIColorAppearanceProperty startingThumbShadowColorProperty;
        static const UIColorAppearanceProperty endingThumbShadowColorProperty;
        static const UIColorAppearanceProperty thumbStrokeColorProperty;
        static const UIColorAppearanceProperty thumbColorProperty;
        static const UIColorAppearanceProperty startingThumbColorProperty;
        static const UIColorAppearanceProperty endingThumbColorProperty;
    };
 
} // namespace CeresEngine