ceguilistbox.h

OGRE开发包的依赖包

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


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

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

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

	void	setItemTooltipsEnabled(bool setting);
	/*!
	\brief
		Set the select state of an attached ListboxItem.

		This is the recommended way of selecting and deselecting items attached to a list box as it respects the
		multi-select mode setting.  It is possible to modify the setting on ListboxItems directly, but that approach
		does not respect the settings of the list box.

	\param item
		The ListboxItem to be affected.  This item must be attached to the list box.

	\param state
		true to select the item, false to de-select the item.

	\return
		Nothing.
	
	\exception	InvalidRequestException	thrown if \a item is not attached to this list box.
	*/
	void	setItemSelectState(ListboxItem* item, bool state);


	/*!
	\brief
		Set the select state of an attached ListboxItem.

		This is the recommended way of selecting and deselecting items attached to a list box as it respects the
		multi-select mode setting.  It is possible to modify the setting on ListboxItems directly, but that approach
		does not respect the settings of the list box.

	\param item_index
		The zero based index of the ListboxItem to be affected.  This must be a valid index (0 <= index < getItemCount())

	\param state
		true to select the item, false to de-select the item.

	\return
		Nothing.
	
	\exception	InvalidRequestException	thrown if \a item_index is out of range for the list box
	*/
	void	setItemSelectState(size_t item_index, bool state);


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

		Client code must call this whenever it has made any changes to ListboxItem objects already attached to the
		list box.  If you are just adding items, or removed items to update them prior to re-adding them, there is
		no need to call this method.

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


	/*!
	\brief
		Ensure the item at the specified index is visible within the list box.

	\param item_index
		Zero based index of the item to be made visible in the list box.  If this value is out of range, the
		list is always scrolled to the bottom.

	\return
		Nothing.
	*/
	void	ensureItemIsVisible(size_t item_index);


	/*!
	\brief
		Ensure the item at the specified index is visible within the list box.

	\param item
		Pointer to the ListboxItem to be made visible in the list box.

	\return
		Nothing.

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


    /*!
    \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;


    /*!
    \brief
        Return a pointer to the vertical scrollbar component widget for this
        Listbox.

    \return
        Pointer to a Scrollbar object.

    \exception UnknownObjectException
        Thrown if the vertical Scrollbar component does not exist.
    */
    Scrollbar* getVertScrollbar() const;

    /*!
    \brief
        Return a pointer to the horizontal scrollbar component widget for this
        Listbox.

    \return
        Pointer to a Scrollbar object.

    \exception UnknownObjectException
        Thrown if the horizontal Scrollbar component does not exist.
    */
    Scrollbar* getHorzScrollbar() const;


    /*!
    \brief
        Return the sum of all item heights
    */
    float   getTotalItemsHeight(void) const;


    /*!
    \brief
        Return the width of the widest item
    */
    float   getWidestItemWidth(void) const;


	/*************************************************************************
		Construction and Destruction
	*************************************************************************/
	/*!
	\brief
		Constructor for Listbox base class.
	*/
	Listbox(const String& type, const String& name);


	/*!
	\brief
		Destructor for Listbox base class.
	*/
	virtual ~Listbox(void);


protected:
	/*************************************************************************
		Abstract Implementation Functions (must be provided by derived class)
	*************************************************************************/
	/*!
	\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_impl(void) const = 0;


	/*************************************************************************
		Implementation Functions
	*************************************************************************/
	/*!
	\brief
		display required integrated scroll bars according to current state of the list box and update their values.
	*/
	void	configureScrollbars(void);

	/*!
	\brief
		select all strings between positions \a start and \a end.  (inclusive)
		including \a end.
	*/
	void	selectRange(size_t start, size_t end);


	/*!
	\brief
		Clear the selected state for all items (implementation)

	\return
		true if some selections were cleared, false nothing was changed.
	*/
	bool	clearAllSelections_impl(void);


	/*!
	\brief
		Return the ListboxItem under the given window local pixel co-ordinate.

	\return
		ListboxItem that is under window pixel co-ordinate \a pt, or NULL if no
		item is under that position.
	*/
	ListboxItem*	getItemAtPoint(const Point& pt) const;


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

	\note
		Note that this will cause 'AutoDelete' items to be deleted.

	\return
		- true if the list contents were changed.
		- false if the list contents were not changed (list already empty).
	*/
	bool	resetList_impl(void);


	/*!
	\brief
		Return whether this window was inherited from the given class name at some point in the inheritance hierarchy.

	\param class_name
		The class name that is to be checked.

	\return
		true if this window was inherited from \a class_name. false if not.
	*/
	virtual bool	testClassName_impl(const String& class_name) const
	{
		if (class_name=="Listbox")	return true;
		return Window::testClassName_impl(class_name);
	}

	/*!
	\brief
	   Internal handler that is triggered when the user interacts with the scrollbars.
    */
    bool handle_scrollChange(const EventArgs& args);


    // validate window renderer
    virtual bool validateWindowRenderer(const String& name) const
    {
        return (name == "Listbox");
    }


	/*************************************************************************
		New event handlers
	*************************************************************************/
	/*!
	\brief
		Handler called internally when the list contents are changed
	*/
	virtual	void	onListContentsChanged(WindowEventArgs& e);


	/*!
	\brief
		Handler called internally when the currently selected item or items changes.
	*/
	virtual	void	onSelectionChanged(WindowEventArgs& e);


	/*!
	\brief
		Handler called internally when the sort mode setting changes.
	*/
	virtual	void	onSortModeChanged(WindowEventArgs& e);


	/*!
	\brief
		Handler called internally when the multi-select mode setting changes.
	*/
	virtual	void	onMultiselectModeChanged(WindowEventArgs& e);


	/*!
	\brief
		Handler called internally when the forced display of the vertical scroll bar setting changes.
	*/
	virtual	void	onVertScrollbarModeChanged(WindowEventArgs& e);


	/*!
	\brief
		Handler called internally when the forced display of the horizontal scroll bar setting changes.
	*/
	virtual	void	onHorzScrollbarModeChanged(WindowEventArgs& e);


	/*************************************************************************
		Overridden Event handlers
	*************************************************************************/
	virtual void	onSized(WindowEventArgs& e);
	virtual void	onMouseButtonDown(MouseEventArgs& e);
	virtual	void	onMouseWheel(MouseEventArgs& e);
	virtual void	onMouseMove(MouseEventArgs& e);


	/*************************************************************************
		Implementation Data
	*************************************************************************/
	typedef	std::vector<ListboxItem*>	LBItemList;
	bool	d_sorted;				//!< true if list is sorted
	bool	d_multiselect;			//!< true if multi-select is enabled
	bool	d_forceVertScroll;		//!< true if vertical scrollbar should always be displayed
	bool	d_forceHorzScroll;		//!< true if horizontal scrollbar should always be displayed
	bool	d_itemTooltips;			//!< true if each item should have an individual tooltip
	LBItemList	d_listItems;		//!< list of items in the list box.
	ListboxItem*	d_lastSelected;	//!< holds pointer to the last selected item (used in range selections)

    friend class ListboxWindowRenderer;

private:
	/*************************************************************************
		Static Properties for this class
	*************************************************************************/
	static ListboxProperties::Sort					d_sortProperty;
	static ListboxProperties::MultiSelect			d_multiSelectProperty;
	static ListboxProperties::ForceVertScrollbar	d_forceVertProperty;
	static ListboxProperties::ForceHorzScrollbar	d_forceHorzProperty;
	static ListboxProperties::ItemTooltips			d_itemTooltipsProperty;

	/*************************************************************************
		Private methods
	*************************************************************************/
	void	addListboxProperties(void);
};


/*!
\brief
	Helper function used in sorting to compare two list box item text strings
	via the ListboxItem pointers and return if \a a is less than \a b.
*/
bool lbi_less(const ListboxItem* a, const ListboxItem* b);


/*!
\brief
	Helper function used in sorting to compare two list box item text strings
	via the ListboxItem pointers and return if \a a is greater than \a b.
*/
bool lbi_greater(const ListboxItem* a, const ListboxItem* b);

} // End of  CEGUI namespace section


#if defined(_MSC_VER)
#	pragma warning(pop)
#endif

#endif	// end of guard _CEGUIListbox_h_