Magic_Game/core/ui/Button.h

// Copyright (c) 2016-2018 Easy2D - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include "../base/Node.h"
#include <functional>

namespace easy2d
{
	namespace ui
	{
		class Button
			: public Node
		{
			E2D_DISABLE_COPY(Button);

			using Callback = std::function<void()>;

		public:
			Button();

			explicit Button(
				spNode const& normal,					/* <20><>ͨ״̬ */
				const Callback& func = nullptr	/* <20><>ť<EFBFBD><C5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
			);

			explicit Button(
				spNode const& normal,					/* <20><>ͨ״̬ */
				spNode const& selected,				/* <20><><EFBFBD>갴<EFBFBD><EAB0B4>״̬ */
				const Callback& func = nullptr	/* <20><>ť<EFBFBD><C5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
			);

			explicit Button(
				spNode const& normal,					/* <20><>ͨ״̬ */
				spNode const& mouseover,				/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬ */
				spNode const& selected,				/* <20><><EFBFBD>갴<EFBFBD><EAB0B4>״̬ */
				const Callback& func = nullptr	/* <20><>ť<EFBFBD><C5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
			);

			explicit Button(
				spNode const& normal,					/* <20><>ͨ״̬ */
				spNode const& mouseover,				/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬ */
				spNode const& selected,				/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬ */
				spNode const& disabled,				/* <20><>ť<EFBFBD><C5A5><EFBFBD><EFBFBD>״̬ */
				const Callback& func = nullptr	/* <20><>ť<EFBFBD><C5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
			);

			virtual ~Button();

			// <20><>ȡ<EFBFBD><C8A1>ť״̬<D7B4><CCAC><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><C3BB>ǽ<EFBFBD><C7BD><EFBFBD>
			bool IsEnable() const;

			// <20><><EFBFBD>ð<EFBFBD>ť<EFBFBD><C5A5><EFBFBD>û<EFBFBD><C3BB><EFBFBD><EFBFBD><EFBFBD>
			void SetEnabled(
				bool enabled
			);

			// <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>İ<EFBFBD>ť
			virtual void SetNormal(
				spNode const& normal
			);

			// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>밴ťʱ<C5A5><CAB1>ʾ<EFBFBD>İ<EFBFBD>ť
			virtual void SetMouseOver(
				spNode const& mouseover
			);

			// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>갴<EFBFBD>°<EFBFBD>ťʱ<C5A5><CAB1>ʾ<EFBFBD>İ<EFBFBD>ť
			virtual void SetSelected(
				spNode const& selected
			);

			// <20><><EFBFBD>ð<EFBFBD>ť<EFBFBD><C5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>ʾ<EFBFBD>İ<EFBFBD>ť
			virtual void SetDisabled(
				spNode const& disabled
			);

			// <20><><EFBFBD>ð<EFBFBD>ť<EFBFBD><C5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD>
			void SetCallbackOnClick(
				const Callback& func
			);

			// <20><><EFBFBD><EFBFBD>֧<EFBFBD><D6A7>λ<EFBFBD><CEBB>
			// Ĭ<><C4AC>Ϊ (0, 0), <20><>Χ [0, 1]
			virtual void SetPivot(
				float pivot_x,
				float pivot_y
			) override;

		private:
			// <20><>ť״̬ö<CCAC><C3B6>
			enum class Status { Normal, Mouseover, Selected };

			// <20><><EFBFBD>ð<EFBFBD>ť״̬
			virtual void SetStatus(
				Status status
			);

			// ˢ<>°<EFBFBD>ť<EFBFBD><C5A5>ʾ
			virtual void UpdateVisible();

			// <20>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ
			virtual bool Dispatch(
				const MouseEvent& e,
				bool handled
			) override;

			// <20><><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>
			virtual void Visit() override;

		private:
			spNode		normal_;
			spNode		mouseover_;
			spNode		selected_;
			spNode		disabled_;
			bool		enabled_;
			bool		is_selected_;
			Status		status_;
			Callback	callback_;
		};
	}
}