ui_button.h

#pragma once
 
#include <cstdint>
#include <string>
 
#include <glm/glm.hpp>
 
#include "core/reflect.h"
#include "ecs/component/ui/ui_shape.h"
 
namespace Vkm::Engine {

struct UIButton {
    enum class State : uint8_t { Normal, Hover, Pressed, Disabled };
 
    glm::vec4 normalColor   = {0.18f, 0.20f, 0.26f, 0.95f};
    glm::vec4 hoverColor    = {0.26f, 0.30f, 0.40f, 0.95f};
    glm::vec4 pressedColor  = {0.12f, 0.14f, 0.18f, 0.95f};
    glm::vec4 disabledColor = {0.15f, 0.15f, 0.17f, 0.60f};
 
    UIShape     shape;                  
    std::string eventId;                
    bool        interactable = true;    
 
    // Written by the UISystem every frame the button is drawn; never authored.
    State     state        = State::Normal;
    bool      held         = false;
    glm::vec2 pointer      = glm::vec2(0.0f);
    glm::vec2 resolvedSize = glm::vec2(0.0f);

    const glm::vec4& colorForState() const {
        // No default, so a new state is a build warning rather than a silent Normal.
        switch (state) {
            case State::Normal:   return normalColor;
            case State::Hover:    return hoverColor;
            case State::Pressed:  return pressedColor;
            case State::Disabled: return disabledColor;
        }
        return normalColor;
    }
};
 
} // namespace Vkm::Engine
 
VKM_REFLECT_BEGIN(::Vkm::Engine::UIButton)
    VKM_F(normalColor)
    VKM_F(hoverColor)
    VKM_F(pressedColor)
    VKM_F(disabledColor)
    VKM_F(shape)
    VKM_F(eventId)
    VKM_F(interactable)
VKM_REFLECT_END()