UISplitView.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 "CeresEngine/DataTypes.hpp"
 
#include "CeresEngine/UI/UIView.hpp"
#include "CeresEngine/UI/UIViewController.hpp"
 
namespace CeresEngine {
 
    class UISplitView : public UIView {
    public:
        enum class DividerStyle {
            Thick,
 
            Thin,
 
            PaneSplitter,
        };
 
    private:
        bool mVertical = true;
 
        DividerStyle mDividerStyle = DividerStyle::PaneSplitter;
 
        UIColor mDividerColor;
 
    private:
        static const UInt32 kUndefinedDragIndex;
 
        UInt32 mDragIndex = kUndefinedDragIndex;
 
    public:
        struct {
            UIDelegate<UISplitView, void()> willResizeSubviews;
 
            UIDelegate<UISplitView, void()> didResizeSubviews;
 
            UIDelegate<UISplitView, bool(UIView* subView)> canCollapseSubview = false;
 
            UIDelegate<UISplitView, void()> layoutSubviews;
 
            UIDelegate<UISplitView, double(double proposedMinimum, UInt32 dividerIndex)> constrainMinimumCoordinate;
 
            UIDelegate<UISplitView, double(double proposedMaximum, UInt32 dividerIndex)> constrainMaximumCoordinate;
 
            UIDelegate<UISplitView, double(double proposedPosition, UInt32 dividerIndex)> constrainSplitPosition;
        } delegate;
 
    public:
        using UIView::UIView;
 
        UISplitView();
 
        explicit UISplitView(DividerStyle dividerStyle);
 
        explicit UISplitView(DividerStyle dividerStyle, const UIColor& dividerColor);
 
        ~UISplitView() override;
 
    public:
        void setPosition(double position, UInt32 index);
 
        void adjustSubViews();
 
        UInt32 getDividerIndexAtPoint(const UIPoint& point) const;
 
        virtual UIRect getDividerRectAtIndex(UInt32 index) const;
 
        bool isSubviewCollapsed(const UIView* subView) const;
 
        [[nodiscard]] bool isVertical() const noexcept { return mVertical; }
 
        void setVertical(bool vertical);
 
        [[nodiscard]] DividerStyle getDividerStyle() const noexcept { return mDividerStyle; }
 
        void setDividerStyle(DividerStyle dividerStyle);
 
        [[nodiscard]] const UIColor& getDividerColor() const noexcept { return mDividerColor; }
 
        void setDividerColor(const UIColor& dividerColor);
 
        [[nodiscard]] virtual double getDividerThickness() const noexcept;
 
    protected:
        virtual void drawDivider(UIGraphicsContext& context, const UIRect& aRect);
 
    protected: // UIView
        void layoutSubviews() override;
 
        void didAddSubview(UIView& view) override;
 
        void didRemoveSubview(UIView& view) override;
 
        void draw(UIGraphicsContext& context, const UIRect& dirtyRect) override;
 
    public: // UIResponder
        void mouseDown(const UIMouseEvent& event) override;
 
        void mouseUp(const UIMouseEvent& event) override;
 
        void mouseDragged(const UIMouseEvent& event) override;
    };
 
    class UISplitViewController : public TUIViewController<UISplitView> {
    public:
        using TUIViewController::TUIViewController;
 
    public:
        void didAddChildViewController(UIViewController* const childViewController) override;
 
        void didRemoveChildViewController(UIViewController* const childViewController) override;
    };
 
    template<typename ModelType> using TUISplitViewController = UIModelViewController<ModelType, UISplitViewController>;
 
} // namespace CeresEngine