ceguilistbox.h

OGRE开发包的依赖包

/***********************************************************************
	filename: 	CEGUIListbox.h
	created:	13/4/2004
	author:		Paul D Turner
	
	purpose:	Interface to base class for Listbox widget
*************************************************************************/
/***************************************************************************
 *   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 _CEGUIListbox_h_
#define _CEGUIListbox_h_

#include "CEGUIBase.h"
#include "CEGUIWindow.h"
#include "elements/CEGUIListboxProperties.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 Listbox window renderer.
*/
class CEGUIEXPORT ListboxWindowRenderer : public WindowRenderer
{
public:
    /*!
    \brief
        Constructor
    */
    ListboxWindowRenderer(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 area of the Window to be used for rendering
        list box items.
    */
    virtual Rect getListRenderArea(void) const = 0;
};

/*!
\brief
	Base class for standard Listbox widget.
*/
class CEGUIEXPORT Listbox : public Window
{
public:
	static const String EventNamespace;				//!< Namespace for global events
    static const String WidgetTypeName;             //!< Window factory name

	/*************************************************************************
		Constants
	*************************************************************************/
	// event names
	static const String EventListContentsChanged;			//!< Event triggered when the contents of the list is changed.
	static const String EventSelectionChanged;			//!< Event triggered when there is a change to the currently selected item(s).
	static const String EventSortModeChanged;				//!< Event triggered when the sort mode setting changes.
	static const String EventMultiselectModeChanged;		//!< Event triggered when the multi-select mode setting changes.
	static const String EventVertScrollbarModeChanged;	//!< Event triggered when the vertical scroll bar 'force' setting changes.
	static const String EventHorzScrollbarModeChanged;	//!< Event triggered when the horizontal scroll bar 'force' setting changes.

    /*************************************************************************
        Child Widget name suffix constants
    *************************************************************************/
    static const String VertScrollbarNameSuffix;   //!< Widget name suffix for the vertical scrollbar component.
    static const String HorzScrollbarNameSuffix;   //!< Widget name suffix for the horizontal scrollbar component.

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

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

	
	/*!
	\brief
		Return the number of selected items in the list box.

	\return
		Total number of attached items that are in the selected state.
	*/
	size_t	getSelectedCount(void) const;


	/*!
	\brief
		Return a pointer to the first selected item.

	\return
		Pointer to a ListboxItem based object that is the first selected item in the list.  will return NULL if
		no item is selected.
	*/
	ListboxItem*	getFirstSelectedItem(void) const;


	/*!
	\brief
		Return a pointer to the next selected item after item \a start_item

	\param start_item
		Pointer to the ListboxItem where the search for the next selected item is to begin.  If this
		parameter is NULL, the search will begin with the first item in the list box.

	\return
		Pointer to a ListboxItem based object that is the next selected item in the list after
		the item specified by \a start_item.  Will return NULL if no further items were selected.

	\exception	InvalidRequestException	thrown if \a start_item is not attached to this list box.
	*/
	ListboxItem*	getNextSelected(const ListboxItem* start_item) const;


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

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

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

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


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

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

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

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


	/*!
	\brief
		return whether list sorting is enabled

	\return
		true if the list is sorted, false if the list is not sorted
	*/
	bool	isSortEnabled(void) const		{return d_sorted;}

	/*!
	\brief
		return whether multi-select is enabled

	\return
		true if multi-select is enabled, false if multi-select is not enabled.
	*/
	bool	isMultiselectEnabled(void) const	{return d_multiselect;}

	bool	isItemTooltipsEnabled(void) const	{return d_itemTooltips;}

	/*!
	\brief
		return whether the string at index position \a index is selected

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

	\return
		true if the item at \a index is selected, false if the item at \a index is not selected.

	\exception	InvalidRequestException	thrown if \a index is out of range.
	*/
	bool	isItemSelected(size_t index) 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
		ListboxItem 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 ListboxItem 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.
	*/
	ListboxItem*	findItemWithText(const String& text, const ListboxItem* start_item);


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

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


	/*!
	\brief
		Return whether the vertical scroll bar is always shown.

	\return
		- true if the scroll bar will always be shown even if it is not required.
		- false if the scroll bar will only be shown when it is required.
	*/
	bool	isVertScrollbarAlwaysShown(void) const;


	/*!
	\brief
		Return whether the horizontal scroll bar is always shown.

	\return
		- true if the scroll bar will always be shown even if it is not required.
		- false if the scroll bar will only be shown when it is required.
	*/
	bool	isHorzScrollbarAlwaysShown(void) const;


	/*************************************************************************
		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 'AutoDelete' items to be deleted.
	*/
	void	resetList(void);


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

	\param item
		Pointer to the ListboxItem 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(ListboxItem* item);


	/*!
	\brief
		Insert an item into the list box 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 ListboxItem 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 ListboxItem 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.
	
	\exception InvalidRequestException	thrown if no ListboxItem \a position is attached to this list box.
	*/
	void	insertItem(ListboxItem* item, const ListboxItem* position);


	/*!
	\brief
		Removes the given item from the list box.  If the item is has the auto delete state set, the item will be deleted.

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

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


	/*!
	\brief
		Clear the selected state for all items.

	\return
		Nothing.
	*/
	void	clearAllSelections(void);


	/*!
	\brief
		Set whether the list should be sorted.

	\param setting
		true if the list should be sorted, false if the list should not be sorted.

	\return
		Nothing.
	*/
	void	setSortingEnabled(bool setting);

	
	/*!
	\brief
		Set whether the list should allow multiple selections or just a single selection

	\param  setting
		true if the widget should allow multiple items to be selected, false if the widget should only allow
		a single selection.

	\return
		Nothing.
	*/
	void	setMultiselectEnabled(bool setting);


	/*!
	\brief
		Set whether the vertical scroll bar should always be shown.

	\param setting
		true if the vertical scroll bar should be shown even when it is not required.  false if the vertical
		scroll bar should only be shown when it is required.