text: /***********************************************************************
      filename:   CEGUIListboxItem.h
      created:    8/6/2004
      author:     Paul D Turner
  
      purpose:    Interface to base class for list items
  *************************************************************************/
  /***************************************************************************
   *   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 _CEGUIListboxItem_h_
  #define _CEGUIListboxItem_h_
  
  #include "../Base.h"
  #include "../String.h"
  #include "../ColourRect.h"
  #include "../TextUtils.h"
  #include "../Size.h"
  #include "../Rect.h"
  
  #if defined(_MSC_VER)
  #  pragma warning(push)
  #  pragma warning(disable : 4251)
  #endif
  
  // Start of CEGUI namespace section
  namespace CEGUI
  {
  /*!
  \brief
      Base class for list box items
  */
  class CEGUIEXPORT ListboxItem :
      public AllocatedObject<ListboxItem>
  {
  public:
      /*************************************************************************
          Constants
      *************************************************************************/
      static const Colour DefaultSelectionColour;     //!< Default selection brush colour.
  
  
      /*************************************************************************
          Construction and Destruction
      *************************************************************************/
      /*!
      \brief
          base class constructor
      */
      ListboxItem(const String& text, uint item_id = 0, void* item_data = 0, bool disabled = false, bool auto_delete = true);
  
  
      /*!
      \brief
          base class destructor
      */
      virtual ~ListboxItem(void);
  
  
      /*************************************************************************
          Accessors
      *************************************************************************/
      /*!
      \brief
          return the text string set for this list box item.
  
          Note that even if the item does not render text, the text string can still be useful, since it
          is used for sorting list box items.
  
      \return
          String object containing the current text for the list box item.
      */
      const String&   getTooltipText(void) const      {return d_tooltipText;}
  
      const String& getText(void) const {return d_textLogical;}
  
      //! return text string with \e visual ordering of glyphs.
      const String& getTextVisual() const;
  
      /*!
      \brief
          Return the current ID assigned to this list box item.
  
          Note that the system does not make use of this value, client code can assign any meaning it
          wishes to the ID.
  
      \return
          ID code currently assigned to this list box item
      */
      uint    getID(void) const           {return d_itemID;}
  
  
      /*!
      \brief
          Return the pointer to any client assigned user data attached to this lis box item.
  
          Note that the system does not make use of this data, client code can assign any meaning it
          wishes to the attached data.
  
      \return
          Pointer to the currently assigned user data.
      */
      void*   getUserData(void) const     {return d_itemData;}
  
  
      /*!
      \brief
          return whether this item is selected.
  
      \return
          true if the item is selected, false if the item is not selected.
      */
      bool    isSelected(void) const      {return d_selected;}
  
  
      /*!
      \brief
          return whether this item is disabled.
  
      \return
          true if the item is disabled, false if the item is enabled.
      */
      bool    isDisabled(void) const      {return d_disabled;}
  
  
      /*!
      \brief
          return whether this item will be automatically deleted when the list box it is attached to
          is destroyed, or when the item is removed from the list box.
  
      \return
          true if the item object will be deleted by the system when the list box it is attached to is
          destroyed, or when the item is removed from the list.  false if client code must destroy the
          item after it is removed from the list.
      */
      bool    isAutoDeleted(void) const   {return d_autoDelete;}
  
  
      /*!
      \brief
          Get the owner window for this ListboxItem.
          
          The owner of a ListboxItem is typically set by the list box widgets when an item is added or inserted.
  
      \return
          Ponter to the window that is considered the owner of this ListboxItem.
      */
      const Window*   getOwnerWindow() const      {return d_owner;}
  
  
      /*!
      \brief
          Return the current colours used for selection highlighting.
  
      \return
          ColourRect object describing the currently set colours
      */
      ColourRect  getSelectionColours(void) const     {return d_selectCols;}
  
  
      /*!
      \brief
          Return the current selection highlighting brush.
  
      \return
          Pointer to the Image object currently used for selection highlighting.
      */
      const Image*    getSelectionBrushImage(void) const      {return d_selectBrush;}
  
  
      /*************************************************************************
          Manipulators
      *************************************************************************/
      /*!
      \brief
          set the text string for this list box item.
  
          Note that even if the item does not render text, the text string can still be useful, since it
          is used for sorting list box items.
  
      \param text
          String object containing the text to set for the list box item.
  
      \return
          Nothing.
      */
      virtual void setText(const String& text);
  
      void    setTooltipText(const String& text)      {d_tooltipText = text;}
  
      /*!
      \brief
          Set the ID assigned to this list box item.
  
          Note that the system does not make use of this value, client code can assign any meaning it
          wishes to the ID.
  
      \param item_id
          ID code to be assigned to this list box item
  
      \return
          Nothing.
      */
      void    setID(uint item_id)     {d_itemID = item_id;}
  
  
      /*!
      \brief
          Set the client assigned user data attached to this lis box item.
  
          Note that the system does not make use of this data, client code can assign any meaning it
          wishes to the attached data.
  
      \param item_data
          Pointer to the user data to attach to this list item.
  
      \return
          Nothing.
      */
      void    setUserData(void* item_data)    {d_itemData = item_data;}
  
  
      /*!
      \brief
          set whether this item is selected.
  
      \param setting
          true if the item is selected, false if the item is not selected.
  
      \return
          Nothing.
      */
      void    setSelected(bool setting)       {d_selected = setting;}
  
  
      /*!
      \brief
          set whether this item is disabled.
  
      \param setting
          true if the item is disabled, false if the item is enabled.
  
      \return
          Nothing.
      */
      void    setDisabled(bool setting)       {d_disabled = setting;}
  
      /*!
      \brief
          Set whether this item will be automatically deleted when the list box it is attached to
          is destroyed, or when the item is removed from the list box.
  
      \param setting
          true if the item object should be deleted by the system when the list box it is attached to is
          destroyed, or when the item is removed from the list.  false if client code will destroy the
          item after it is removed from the list.
  
      \return
          Nothing.
      */
      void    setAutoDeleted(bool setting)        {d_autoDelete = setting;}
  
  
      /*!
      \brief
          Set the owner window for this ListboxItem.  This is called by all the list box widgets when
          an item is added or inserted.
  
      \param owner
          Ponter to the window that should be considered the owner of this ListboxItem.
  
      \return
          Nothing
      */
      void    setOwnerWindow(const Window* owner)     {d_owner = owner;}
  
  
      /*!
      \brief
          Set the colours used for selection highlighting.
  
      \param cols
          ColourRect object describing the colours to be used.
  
      \return
          Nothing.
      */
      void    setSelectionColours(const ColourRect& cols)     {d_selectCols = cols;}
  
  
      /*!
      \brief
          Set the colours used for selection highlighting.
  
      \param top_left_colour
          Colour (as ARGB value) to be applied to the top-left corner of the selection area.
  
      \param top_right_colour
          Colour (as ARGB value) to be applied to the top-right corner of the selection area.
  
      \param bottom_left_colour
          Colour (as ARGB value) to be applied to the bottom-left corner of the selection area.
  
      \param bottom_right_colour
          Colour (as ARGB value) to be applied to the bottom-right corner of the selection area.
  
      \return
          Nothing.
      */
      void    setSelectionColours(Colour top_left_colour, Colour top_right_colour, Colour bottom_left_colour, Colour bottom_right_colour);
  
  
      /*!
      \brief
          Set the colours used for selection highlighting.
  
      \param col
          colour value to be used when rendering.
  
      \return
          Nothing.
      */
      void    setSelectionColours(Colour col)     {setSelectionColours(col, col, col, col);}
  
  
      /*!
      \brief
          Set the selection highlighting brush image.
  
      \param image
          Pointer to the Image object to be used for selection highlighting.
  
      \return
          Nothing.
      */
      void    setSelectionBrushImage(const Image* image)      {d_selectBrush = image;}
  
  
      /*!
      \brief
          Set the selection highlighting brush image.
  
      \param name
          Name of the image to be used
  
      \return
          Nothing.
      */
      void    setSelectionBrushImage(const String& name);
  
      /*!
      \brief
          Perform any updates needed because the given font's render size has
          changed.
  
      /note
          The base implementation just returns false.
  
      \param font
          Pointer to the Font whose render size has changed.
  
      \return
          - true if some action was taken.
          - false if no action was taken (i.e font is not used here).
      */
      virtual bool handleFontRenderSizeChange(const Font* const font);
  
      /*************************************************************************
          Abstract portion of interface
      *************************************************************************/
      /*!
      \brief
          Return the rendered pixel size of this list box item.
  
      \return
          Size object describing the size of the list box item in pixels.
      */
      virtual Sizef getPixelSize(void) const = 0;
  
  
      /*!
      \brief
          Draw the list box item in its current state
  
      \param position
          Vecor2 object describing the upper-left corner of area that should be rendered in to for the draw operation.
  
      \param alpha
          Alpha value to be used when rendering the item (between 0.0f and 1.0f).
  
      \param clipper
          Rect object describing the clipping rectangle for the draw operation.
  
      \return
          Nothing.
      */
      virtual void draw(GeometryBuffer& buffer, const Rectf& targetRect,
                        float alpha, const Rectf* clipper) const = 0;
  
      /*************************************************************************
          Operators
      *************************************************************************/
      /*!
      \brief
          Less-than operator, compares item texts.
      */
      virtual bool    operator<(const ListboxItem& rhs) const     {return getText() < rhs.getText();}
  
  
      /*!
      \brief
          Greater-than operator, compares item texts.
      */
      virtual bool    operator>(const ListboxItem& rhs) const     {return getText() > rhs.getText();}
  
  
  protected:
      /*************************************************************************
          Implementation methods
      *************************************************************************/
      /*!
      \brief
          Return a ColourRect object describing the colours in \a cols after having their alpha
          component modulated by the value \a alpha.
      */
      ColourRect getModulateAlphaColourRect(const ColourRect& cols, float alpha) const;
  
  
      /*!
      \brief
          Return a colour value describing the colour specified by \a col after having its alpha
          component modulated by the value \a alpha.
      */
      Colour calculateModulatedAlphaColour(Colour col, float alpha) const;
  
  
      /*************************************************************************
          Implementation Data
      *************************************************************************/
      String d_textLogical;
      //! pointer to bidirection support object
      BidiVisualMapping* d_bidiVisualMapping;
      //! whether bidi visual mapping has been updated since last text change.
      mutable bool d_bidiDataValid;
      String  d_tooltipText;  //!< Text for the individual tooltip of this item
      uint    d_itemID;       //!< ID code assigned by client code.  This has no meaning within the GUI system.
      void*   d_itemData;     //!< Pointer to some client code data.  This has no meaning within the GUI system.
      bool    d_selected;     //!< true if this item is selected.  false if the item is not selected.
      bool    d_disabled;     //!< true if this item is disabled.  false if the item is not disabled.
      bool    d_autoDelete;   //!< true if the system should destroy this item, false if client code will destroy the item.
      const Window*   d_owner;    //!< Pointer to the window that owns this item.
      ColourRect      d_selectCols;       //!< Colours used for selection highlighting.
      const Image*    d_selectBrush;      //!< Image used for rendering selection.
  };
  
  } // End of  CEGUI namespace section
  
  #if defined(_MSC_VER)
  #  pragma warning(pop)
  #endif
  
  #endif  // end of guard _CEGUIListboxItem_h_
  