spk_icon_button.hpp

#pragma once
 
#include "structure/design_pattern/spk_contract_provider.hpp"
#include "structure/math/spk_vector2.hpp"
#include "structure/widget/components/spk_icon_region.hpp"
#include "structure/widget/components/spk_nine_slice_background.hpp"
#include "structure/widget/spk_widget.hpp"
 
namespace spk
{
    class IconButton : public spk::Widget
    {
    public:
        using Contract = spk::TContractProvider<>::Contract;
        using Job = spk::TContractProvider<>::Job;

        enum class State
        {
            Released,
            Pressed,
            Hovered,
            Both
        };
 
    private:
        struct Visual
        {
            NineSliceBackground background;
            IconRegion icon;
            spk::Vector2UInt iconPadding{0, 0};
            bool iconVisible = true;
        };
 
        Visual _released;
        Visual _pressed;
        Visual _hovered;
 
        bool _isPressed = false;
        bool _isHovered = false;
 
        spk::TContractProvider<> _onClick;
 
        Visual &_visualForState(State p_state);
        const Visual &_visualForState(State p_state) const;
        void _applyGeometry();
 
    protected:
        void _setIconVisible(bool p_visible, State p_state = State::Both);
        bool _iconVisible(State p_state = State::Released) const;

        void _onGeometryChange() override;
        void _onPaintEvent(spk::PaintEvent &p_event) override;
        void _onMousePressEvent(spk::MousePressEvent &p_event) override;
        void _onMouseReleaseEvent(spk::MouseReleaseEvent &p_event) override;
        void _onMouseDoubleClickEvent(spk::MouseDoubleClickEvent &p_event) override;
        void _onMouseMotionEvent(spk::MouseMotionEvent &p_event) override;
 
    public:
        IconButton(const std::wstring &p_name, spk::Widget *p_parent);

        void setVisualState(const State &p_state);
        void toggle(State p_state = State::Both);
        bool isIconVisible(State p_state = State::Released) const;
        Contract subscribe(const Job &p_job);

        void setTexture(const spk::SpriteSheet *p_spriteSheet, State p_state = State::Both);
        void setCornerSize(const spk::Vector2UInt &p_cornerSize, State p_state = State::Both);

        void setIconTexture(const spk::SpriteSheet &p_spriteSheet, State p_state = State::Both);
        void setIconTexture(const spk::SpriteSheet *p_spriteSheet, State p_state = State::Both);
        void setIconSpriteID(const spk::Vector2UInt &p_spriteID, State p_state = State::Both);
        void setIconPadding(const spk::Vector2UInt &p_padding, State p_state = State::Both);

        const spk::SpriteSheet *texture(State p_state = State::Both) const;
        const spk::Vector2UInt &cornerSize(State p_state = State::Both) const;
        const spk::SpriteSheet *iconTexture(State p_state = State::Both) const;
        const spk::Vector2UInt &iconSpriteID(State p_state = State::Both) const;
        const spk::Vector2UInt &iconPadding(State p_state = State::Both) const;
    };
}