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EmptyBox.h

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// MathCore = a WYSIWYG equation editor + a powerful math engine     //
// Copyright (C) 2003 by Francesco Montorsi                          //
//                                                                   //
// This library is free software; you can redistribute it and/or     //
// modify it under the terms of the GNU Lesser General Public        //
// License as published by the Free Software Foundation; either      //
// version 2.1 of the License, or (at your option) any later         //
// version.                                                          //
//                                                                   //
// This library is distributed in the hope that it will be useful,   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of    //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the      //
// GNU Lesser General Public License for more details.               //
//                                                                   //
// You should have received a copy of the GNU Lesser General Public  //
// License along with this program; if not, write to the Free        //
// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,   //
// MA 02111-1307, USA.                                               //
//                                                                   //
// For any comment, suggestion or feature request, please contact    //
// the administrator of the project at frm@users.sourceforge.net     //
//                                                                   //



#ifndef EMPTYBOX_H
#define EMPTYBOX_H


// optimization for GCC compiler
#ifdef __GNUG__
#pragma interface "EmptyBox.h"
#endif

// required includes
#include "mc/Decoration.h"


mcDEFINE_HELPER_CLASSES(mcEmptyBox)





class mcEmptyBoxHelpers : public mcDecorationHelpers
{
public:
 mcDEFINE_REFERENCE_DATA(mcEmptyBox, mcET_EMPTYBOX);

public:
 mcEmptyBoxHelpers() { data_Init(); }
 virtual ~mcEmptyBoxHelpers() {}


#ifdef mcENABLE_DATA
public:

#ifdef __MCDEBUG__

 wxString data_Debug(long flags) const  { return wxT("mcEmptyBox\n"); }

#endif
#endif  // mcENABLE_DATA



#ifdef mcENABLE_GUI
public:    // customizable variables
  
 static float sgui_fEmptyBoxCharWidth;

 static float sgui_fEmptyBoxCharHeight;

 static wxBrush *sgui_pEmptyBoxBrush;

 static mcKey *sgui_pNewEmptyBox;


public:

 
 bool gui_isBeginKey(const mcKey &key) const {
  if (key.MatchKey(*sgui_pNewEmptyBox))
   return TRUE;
  return FALSE;
 }
 
 bool gui_isEndKey(const mcKey &key) const;
  
 int gui_Draw(wxDC &dc, int x, int y, long flags, const wxPoint &pt) const;
 mcInputRes gui_Input(const mcKey &key, mcElement *pnew);
 mcInsertRes gui_Insert(const mcElement &, mcElement *);
 mcMoveCursorRes gui_MoveCursor(mcMoveCursorFlag flag, long modifiers);
 int gui_MoveCursorUsingPoint(wxDC &dc, const wxPoint &p);
 int gui_GetRelCursorPos(wxDC &dc, wxPoint *pt) const;
 void gui_DoRecalcSize();

 void gui_SetCursorPos(const mcCursorPos &code) {}
 void gui_GetCursorPos(mcCursorPos &p) const
  { p.gui_Push(mcCP_BEGINEND); }


#endif  // mcENABLE_GUI



#ifdef mcENABLE_IO
public:

 bool io_isBeginTag(const wxXml2Node &tag) const {
  if (tag.GetName() == wxT("memptybox"))
   return TRUE;
  return FALSE;
 }

 static wxString io_GetInlinedExprTag() { return wxT("[~]"); }

 wxXml2Node io_GetMathML(bool bGetPresentation) const;
 wxString io_GetInlinedExpr() const; 

 bool io_ImportPresentationMathML(wxXml2Node tag, wxString &pErr); 

#endif  // mcENABLE_IO
};


class mcEmptyBox : public mcDecoration 
{
 // this class doesn't have any specific variable; it's just a place
 // where all the empty boxes' behaviours are described by the
 // following functions...
 mcDEFINE_MAIN_CLASS(EmptyBox, mcDecoration);
 
public:

 bool data_isValidContainerFor(mcElementType t) const
  { return t == mcET_EMPTYBOX; }
};

#endif // EMPTYBOX_H

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