#pragma once

#include "BsEditorPrerequisites.h"
#include "BsGUIFieldBase.h"
#include "BsColor.h"

namespace BansheeEngine
{
	/**
	 * @brief	A composite GUI object representing an editor field. Editor fields are a combination
	 *			of a label and an input field. Label is optional. This specific implementation
	 *			displays a color input field.
	 */
	class BS_ED_EXPORT GUIColorField : public TGUIField<GUIColorField>
	{
	public:
		/**
		 * Returns type name of the GUI element used for finding GUI element styles. 
		 */
		static const String& getGUITypeName();

		/**
		 * Style type name for the internal color field.
		 */
		static const String& getColorInputStyleType();

		GUIColorField(const PrivatelyConstruct& dummy, const GUIContent& labelContent, UINT32 labelWidth,
			const String& style, const GUIDimensions& dimensions, bool withLabel);

		/**
		 * @brief	Returns the value of the field.
		 */
		Color getValue() const { return mValue; }

		/**
		 * @brief	Changes the value of the field.
		 */
		void setValue(const Color& value);

		/**
		 * @copydoc	GUIElement::setTint
		 */
		virtual void setTint(const Color& color) override;

		/**
		 * @copydoc	GUIElement::_getOptimalSize
		 */
		Vector2I _getOptimalSize() const override;

		Event<void(const Color&)> onValueChanged; /**< Triggered when the displayed color value changes. */
	protected:
		virtual ~GUIColorField();

		/**
		 * @copydoc	GUIElement::styleUpdated
		 */
		void styleUpdated() override;

		/**
		 * @brief	Triggered when the child color input field's value changes.
		 */
		void valueChanged(const Color& newValue);

		UINT32 mLabelWidth;
		Color mValue;
		GUILabel* mLabel;
		GUIColor* mColor;
	};
}