ceguiitemlistbase.h

OGRE开发包的依赖包

/***********************************************************************
	filename: 	CEGUIItemListBase.h
	created:	31/3/2005
	author:		Tomas Lindquist Olsen (based on original Listbox code by Paul D Turner)
	
	purpose:	Interface to base class for ItemListBase widgets
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
 *
 *   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 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.
 ***************************************************************************/
#ifndef _CEGUIItemListBase_h_
#define _CEGUIItemListBase_h_

#include "CEGUIBase.h"
#include "CEGUIWindow.h"
#include "elements/CEGUIItemListBaseProperties.h"
#include "elements/CEGUIItemEntry.h"

#include <vector>


#if defined(_MSC_VER)
#	pragma warning(push)
#	pragma warning(disable : 4251)
#endif


// Start of CEGUI namespace section
namespace CEGUI
{

/*!
\brief
    Base class for ItemListBase window renderer.
*/
class CEGUIEXPORT ItemListBaseWindowRenderer : public WindowRenderer
{
public:
    /*!
    \brief
        Constructor
    */
    ItemListBaseWindowRenderer(const String& name);

    /*!
    \brief
        Return a Rect object describing, in un-clipped pixels, the window relative area
        that is to be used for rendering list items.

    \return
        Rect object describing the window relative area of the that is to be used for rendering
        the items.
    */
    virtual Rect getItemRenderArea(void) const = 0;
};

/*!
\brief
	Base class for item list widgets.
*/
class CEGUIEXPORT ItemListBase : public Window
{
public:
	static const String EventNamespace;				//!< Namespace for global events

    /*!
    \brief
        Sort modes for ItemListBase
    */
    enum SortMode
    {
        Ascending,
        Descending,
        UserSort
    };
    
    //!< Sorting callback type
    typedef bool (*SortCallback)(const ItemEntry* a, const ItemEntry* b);

	/*************************************************************************
		Constants
	*************************************************************************/
	// event names
	static const String EventListContentsChanged;			//!< Event triggered when the contents of the list is changed.
    static const String EventSortEnabledChanged; //!< Event fired when the sort enabled state changes.
    static const String EventSortModeChanged; //!< Event fired when the sort mode changes.

	/*************************************************************************
		Accessor Methods
	*************************************************************************/
	/*!
	\brief
		Return number of items attached to the list

	\return
		the number of items currently attached to this list.
	*/
	size_t	getItemCount(void) const		{return d_listItems.size();}


	/*!
	\brief
		Return the item at index position \a index.

	\param index
		Zero based index of the item to be returned.

	\return
		Pointer to the ItemEntry at index position \a index in the list.

	\exception	InvalidRequestException	thrown if \a index is out of range.
	*/
	ItemEntry*	getItemFromIndex(size_t index) const;


	/*!
	\brief
		Return the index of ItemEntry \a item

	\param item
		Pointer to a ItemEntry whos zero based index is to be returned.

	\return
		Zero based index indicating the position of ItemEntry \a item in the list.

	\exception	InvalidRequestException	thrown if \a item is not attached to this list.
	*/
	size_t	getItemIndex(const ItemEntry* item) const;


	/*!
	\brief
		Search the list for an item with the specified text

	\param text
		String object containing the text to be searched for.

	\param start_item
		ItemEntry where the search is to begin, the search will not include \a item.  If \a item is
		NULL, the search will begin from the first item in the list.

	\return
		Pointer to the first ItemEntry in the list after \a item that has text matching \a text.  If
		no item matches the criteria NULL is returned.

	\exception	InvalidRequestException	thrown if \a item is not attached to this list box.
	*/
	ItemEntry*	findItemWithText(const String& text, const ItemEntry* start_item);


	/*!
	\brief
		Return whether the specified ItemEntry is in the List

	\return
		true if ItemEntry \a item is in the list, false if ItemEntry \a item is not in the list.
	*/
	bool	isItemInList(const ItemEntry* item) const;


	/*!
	\brief
		Return whether this window is automatically resized to fit its content.

	\return
		true if automatic resizing is enabled, false if it is disabled.
	*/
	bool isAutoResizeEnabled() const		{return d_autoResize;}


    /*!
    \brief
        Returns 'true' if the list is sorted
    */
    bool isSortEnabled(void) const          {return d_sortEnabled;}


    /*!
    \brief
        Get sort mode.
    */
    SortMode getSortMode(void) const        {return d_sortMode;}


    /*!
    \brief
        Get user sorting callback.
    */
    SortCallback getSortCallback(void) const {return d_sortCallback;}

	/*************************************************************************
		Manipulator Methods
	*************************************************************************/
    /*!
    \brief
        Initialise the Window based object ready for use.

    \note
        This must be called for every window created.  Normally this is handled automatically by the WindowFactory for each Window type.

    \return
        Nothing
    */
    virtual void initialiseComponents(void);


	/*!
	\brief
		Remove all items from the list.

		Note that this will cause items, which does not have the 'DestroyedByParent' property set to 'false', to be deleted.
	*/
	void	resetList(void);


	/*!
	\brief
		Add the given ItemEntry to the list.

	\param item
		Pointer to the ItemEntry to be added to the list.  Note that it is the passed object that is added to the
		list, a copy is not made.  If this parameter is NULL, nothing happens.

	\return
		Nothing.
	*/
	void	addItem(ItemEntry* item);


	/*!
	\brief
		Insert an item into the list after a specified item already in the list.

		Note that if the list is sorted, the item may not end up in the requested position.

	\param item
		Pointer to the ItemEntry to be inserted.  Note that it is the passed object that is added to the
		list, a copy is not made.  If this parameter is NULL, nothing happens.

	\param position
		Pointer to a ItemEntry that \a item is to be inserted after.  If this parameter is NULL, the item is
		inserted at the start of the list.

	\return
		Nothing.
	*/
	void	insertItem(ItemEntry* item, const ItemEntry* position);


	/*!
	\brief
		Removes the given item from the list.  If the item is has the 'DestroyedByParent' property set to 'true', the item will be deleted.

	\param item
		Pointer to the ItemEntry that is to be removed.  If \a item is not attached to this list then nothing
		will happen.

	\return
		Nothing.
	*/
	void	removeItem(ItemEntry* item);


    /*!
	\brief
		Causes the list to update it's internal state after changes have been made to one or more
		attached ItemEntry objects.

		It should not be necessary to call this from client code, as the ItemEntries themselves call it if their parent is an ItemListBase.

    \param resort
        'true' to redo the list sorting as well.
        'false' to only do layout and perhaps auto resize.
        (defaults to 'false')

	\return
		Nothing.
	*/
	void	handleUpdatedItemData(bool resort=false);


	/*!
	\brief
		Set whether or not this ItemListBase widget should automatically resize to fit its content.

	\param setting
		Boolean value that if true enables automatic resizing, if false disables automatic resizing.