Danbias/Code/Game/DanBiasGame/GameClientState/Buttons/EventButtonGUI.h

//////////////////////////////////////
// Created by Pontus Fransson 2014  //
//////////////////////////////////////

#ifndef DANBIAS_CLIENT_EVENT_BUTTON_GUI_H
#define DANBIAS_CLIENT_EVENT_BUTTON_GUI_H

#include "../Misc/EventHandler/EventButton.h"
#include "../OysterGraphics/DllInterfaces/GFXAPI.h"



namespace DanBias
{
	namespace Client
	{
		/*Dictates if the texture should be resized based on the screen aspect ratio.
		  
		*/
		enum ResizeAspectRatio
		{
			ResizeAspectRatio_None,
			ResizeAspectRatio_Width,
			ResizeAspectRatio_Height,

			ResizeAspectRatio_Count,
			ResizeAspectRatio_Unknown = -1
		};


		template <typename Owner>
		class EventButtonGUI : public Oyster::Event::EventButton<Owner>
		{
		public:
			EventButtonGUI() 
				: EventButton(), pos(0, 0), size(0, 0), texture(NULL), buttonText(""), textColor(0, 0, 0)
			{}
			EventButtonGUI(std::wstring textureName, std::wstring buttonText, Oyster::Math::Float3 textColor, Owner owner, Oyster::Math::Float3 pos, 
							Oyster::Math::Float2 size, ResizeAspectRatio resize = ResizeAspectRatio_Height) 
				: EventButton(owner), pos(pos), size(size), texture(NULL), buttonText(buttonText), textColor(textColor)
			{
				CreateTexture(textureName);
				if(resize != ResizeAspectRatio_None) ResizeWithAspectRatio(resize);
			}
			EventButtonGUI(std::wstring textureName, std::wstring buttonText, Oyster::Math::Float3 textColor, EventFunc func, Oyster::Math::Float3 pos, 
							Oyster::Math::Float2 size, ResizeAspectRatio resize = ResizeAspectRatio_Height) 
				: EventButton(func), pos(pos), size(size), texture(NULL), buttonText(buttonText), textColor(textColor)
			{
				CreateTexture(textureName);
				if(resize != ResizeAspectRatio_None) ResizeWithAspectRatio(resize);
			}
			EventButtonGUI(std::wstring textureName, std::wstring buttonText, Oyster::Math::Float3 textColor, EventFunc func, Owner owner, Oyster::Math::Float3 pos, 
							Oyster::Math::Float2 size, ResizeAspectRatio resize = ResizeAspectRatio_Height) 
				: EventButton(func, owner), pos(pos), size(size), texture(NULL), buttonText(buttonText), textColor(textColor)
			{
				CreateTexture(textureName);
				if(resize != ResizeAspectRatio_None) ResizeWithAspectRatio(resize);
			}
			EventButtonGUI(std::wstring textureName, std::wstring buttonText, Oyster::Math::Float3 textColor, EventFunc func, Owner owner, void* userData, Oyster::Math::Float3 pos, Oyster::Math::Float2 size, ResizeAspectRatio resize = ResizeAspectRatio_Height) 
				: EventButton(func, owner, userData), pos(pos), size(size), texture(NULL), buttonText(buttonText), textColor(textColor)
			{
				CreateTexture(textureName);
				if(resize != ResizeAspectRatio_None) ResizeWithAspectRatio(resize);
			}
			virtual ~EventButtonGUI()
			{
				Oyster::Graphics::API::DeleteTexture(texture);
				texture = NULL;
			}

			void CreateTexture(std::wstring textureName)
			{
				//Create texture
				texture = Oyster::Graphics::API::CreateTexture(textureName);
			}

			virtual void RenderTexture()
			{
				if(EventButton<Owner>::Enabled())
				{
					//Render att xPos and yPos
					//With width and height

					if(EventButton<Owner>::GetState() == ButtonState_None)
					{
						Oyster::Graphics::API::RenderGuiElement(texture, pos.xy, size, Oyster::Math::Float3(1.0f, 1.0f, 1.0f));
					}
					else if(EventButton<Owner>::GetState() == ButtonState_Hover)
					{
						Oyster::Graphics::API::RenderGuiElement(texture, pos.xy, size, Oyster::Math::Float3(0.0f, 1.0f, 0.0f));
					}
					else
					{
						Oyster::Graphics::API::RenderGuiElement(texture, pos.xy, size, Oyster::Math::Float3(1.0f, 0.0f, 0.0f));
					}

				}
			}

			virtual void RenderText()
			{
				if(buttonText.size() > 0)
				{
					Oyster::Graphics::API::RenderText(buttonText, pos.xy, size, textColor);
				}
			}

		private:
			void ResizeWithAspectRatio(ResizeAspectRatio resize)
			{
				RECT r;
				GetClientRect(WindowShell::GetHWND(), &r);

				if(resize == ResizeAspectRatio_Height)
					size.y *= (float)r.right/(float)r.bottom;
				else if(resize == ResizeAspectRatio_Width)
					size.x *= (float)r.bottom/(float)r.right;
			}

		protected:
			Oyster::Math::Float3 pos;
			Oyster::Math::Float2 size;

			Oyster::Graphics::API::Texture texture;
			
			std::wstring buttonText;
			Oyster::Math::Float3 textColor;
		};
	}
}

#endif