// Copyright (C) 2002-2011 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __I_GUI_CONTEXT_MENU_H_INCLUDED__
#define __I_GUI_CONTEXT_MENU_H_INCLUDED__

#include "IGUIElement.h"

namespace irr
{
namespace gui
{
	//! Close behaviour.
	//! Default is ECMC_REMOVE
	enum ECONTEXT_MENU_CLOSE
	{
		//! do nothing - menu stays open
		ECMC_IGNORE = 0,

		//! remove the gui element
		ECMC_REMOVE = 1,

		//! call setVisible(false)
		ECMC_HIDE = 2

	 	// note to implementors - this is planned as bitset, so continue with 4 if you need to add further flags.
	};

	//! GUI Context menu interface.
	class IGUIContextMenu : public IGUIElement
	{
	public:

		//! constructor
		IGUIContextMenu(IGUIEnvironment* environment, IGUIElement* parent, s32 id, core::rect<s32> rectangle)
			: IGUIElement(EGUIET_CONTEXT_MENU, environment, parent, id, rectangle) {}

		//! set behaviour when menus are closed
		virtual void setCloseHandling(ECONTEXT_MENU_CLOSE onClose) = 0;

		//! get current behaviour when the menu will be closed
		virtual ECONTEXT_MENU_CLOSE getCloseHandling() const = 0;

		//! Get amount of menu items
		virtual u32 getItemCount() const = 0;

		//! Adds a menu item.
		/** \param text: Text of menu item. Set this to 0 to create
		an separator instead of a real item, which is the same like
		calling addSeparator();
		\param commandId: Command id of menu item, a simple id you may
		set to whatever you want.
		\param enabled: Specifies if the menu item should be enabled.
		\param hasSubMenu: Set this to true if there should be a submenu
		at this item. You can access this submenu via getSubMenu().
		\param checked: Specifies if the menu item should be initially checked.
		\param autoChecking: Specifies if the item should be checked by clicking
		\return Returns the index of the new item */
		virtual u32 addItem(const wchar_t* text, s32 commandId=-1, bool enabled=true,
			bool hasSubMenu=false, bool checked=false, bool autoChecking=false) = 0;

        //! Insert a menu item at specified position.
        /** \param idx: Position to insert the new element,
        should be smaller than itemcount otherwise the item is added to the end.
        \param text: Text of menu item. Set this to 0 to create
		an separator instead of a real item, which is the same like
		calling addSeparator();
		\param commandId: Command id of menu item, a simple id you may
		set to whatever you want.
		\param enabled: Specifies if the menu item should be enabled.
		\param hasSubMenu: Set this to true if there should be a submenu
		at this item. You can access this submenu via getSubMenu().
		\param checked: Specifies if the menu item should be initially checked.
		\param autoChecking: Specifies if the item should be checked by clicking
		\return Returns the index of the new item */
		virtual u32 insertItem(u32 idx, const wchar_t* text, s32 commandId=-1, bool enabled=true,
			bool hasSubMenu=false, bool checked=false, bool autoChecking=false) = 0;

		//! Find an item by it's CommandID
		/**
		\param commandId: We are looking for the first item which has this commandID
		\param idxStartSearch: Start searching from this index.
        \return Returns the index of the item when found or otherwise -1. */
		virtual s32 findItemWithCommandId(s32 commandId, u32 idxStartSearch=0) const = 0;

		//! Adds a separator item to the menu
		virtual void addSeparator() = 0;

		//! Get text of the menu item.
		/** \param idx: Zero based index of the menu item */
		virtual const wchar_t* getItemText(u32 idx) const = 0;

		//! Sets text of the menu item.
		/** \param idx: Zero based index of the menu item
		\param text: New text of the item. */
		virtual void setItemText(u32 idx, const wchar_t* text) = 0;

		//! Check if a menu item is enabled
		/** \param idx: Zero based index of the menu item */
		virtual bool isItemEnabled(u32 idx) const = 0;

		//! Sets if the menu item should be enabled.
		/** \param idx: Zero based index of the menu item
		\param enabled: True if it is enabled, otherwise false. */
		virtual void setItemEnabled(u32 idx, bool enabled) = 0;

		//! Sets if the menu item should be checked.
		/** \param idx: Zero based index of the menu item
		\param enabled: True if it is enabled, otherwise false. */
		virtual void setItemChecked(u32 idx, bool enabled) = 0;

		//! Check if a menu item is checked
		/** \param idx: Zero based index of the menu item */
		virtual bool isItemChecked(u32 idx) const = 0;

		//! Removes a menu item
		/** \param idx: Zero based index of the menu item */
		virtual void removeItem(u32 idx) = 0;

		//! Removes all menu items
		virtual void removeAllItems() = 0;

		//! Get the selected item in the menu
		/** \return Index of the selected item, -1 if none selected. */
		virtual s32 getSelectedItem() const = 0;

		//! Get the command id of a menu item
		/** \param idx: Zero based index of the menu item */
		virtual s32 getItemCommandId(u32 idx) const = 0;

		//! Sets the command id of a menu item
		/** \param idx: Zero based index of the menu item
		\param id: Command id of menu item, a simple id you may
		set to whatever you want. */
		virtual void setItemCommandId(u32 idx, s32 id) = 0;

		//! Get a pointer to the submenu of an item.
		/** 0 is returned if there is no submenu
		\param idx: Zero based index of the menu item
		\return Returns a pointer to the submenu of an item. */
		virtual IGUIContextMenu* getSubMenu(u32 idx) const = 0;

		//! should the element change the checked status on clicking
		virtual void setItemAutoChecking(u32 idx, bool autoChecking) = 0;

		//! does the element change the checked status on clicking
		virtual bool getItemAutoChecking(u32 idx) const = 0;

		//! When an eventparent is set it receives events instead of the usual parent element
		virtual void setEventParent(IGUIElement *parent) = 0;
	};

} // end namespace gui
} // end namespace irr

#endif