Widgets: Add widget theme (WIP)

include/Nazara/Widgets/WidgetTheme.hpp

@@ -0,0 +1,84 @@
+// Copyright (C) 2021 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Widgets module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_WIDGETS_WIDGETTHEME_HPP
+#define NAZARA_WIDGETS_WIDGETTHEME_HPP
+
+#include <Nazara/Graphics/Sprite.hpp>
+#include <Nazara/Math/Vector2.hpp>
+#include <Nazara/Renderer/Texture.hpp>
+#include <Nazara/Widgets/BaseWidget.hpp>
+
+namespace Nz
+{
+	class AbstractTextDrawer;
+	class ButtonWidget;
+	class ButtonWidgetStyle;
+
+	class NAZARA_WIDGETS_API WidgetTheme
+	{
+		public:
+			WidgetTheme() = default;
+			WidgetTheme(const WidgetTheme&) = delete;
+			WidgetTheme(WidgetTheme&&) = default;
+			virtual ~WidgetTheme();
+
+			virtual std::unique_ptr<ButtonWidgetStyle> CreateStyle(ButtonWidget* buttonWidget) const = 0;
+
+			WidgetTheme& operator=(const WidgetTheme&) = delete;
+			WidgetTheme& operator=(WidgetTheme&&) = default;
+
+		private:
+	};
+
+	class NAZARA_WIDGETS_API BaseWidgetStyle
+	{
+		public:
+			inline BaseWidgetStyle(BaseWidget* widget);
+			BaseWidgetStyle(const BaseWidgetStyle&) = delete;
+			BaseWidgetStyle(BaseWidgetStyle&&) = default;
+			virtual ~BaseWidgetStyle();
+
+			inline entt::entity CreateEntity();
+			inline void DestroyEntity(entt::entity entity);
+
+			inline entt::registry& GetRegistry();
+			inline const entt::registry& GetRegistry() const;
+			UInt32 GetRenderMask() const;
+
+			BaseWidgetStyle& operator=(const BaseWidgetStyle&) = delete;
+			BaseWidgetStyle& operator=(BaseWidgetStyle&&) = default;
+
+		private:
+			BaseWidget* m_widgetOwner;
+	};
+
+	class NAZARA_WIDGETS_API ButtonWidgetStyle : public BaseWidgetStyle
+	{
+		public:
+			using BaseWidgetStyle::BaseWidgetStyle;
+			ButtonWidgetStyle(const ButtonWidgetStyle&) = delete;
+			ButtonWidgetStyle(ButtonWidgetStyle&&) = default;
+			~ButtonWidgetStyle() = default;
+
+			virtual void Layout(const Vector2f& size) = 0;
+
+			virtual void OnHoverBegin();
+			virtual void OnHoverEnd();
+			virtual void OnPress();
+			virtual void OnRelease();
+
+			virtual void UpdateText(const AbstractTextDrawer& drawer) = 0;
+
+			ButtonWidgetStyle& operator=(const ButtonWidgetStyle&) = delete;
+			ButtonWidgetStyle& operator=(ButtonWidgetStyle&&) = default;
+
+	};
+}
+
+#include <Nazara/Widgets/WidgetTheme.inl>
+
+#endif // NAZARA_WIDGETS_WIDGETTHEME_HPP