gtk-manager.h

Go to the documentation of this file.

////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2007-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////
 
#if ! defined (octave_gtk_manager_h)
#define octave_gtk_manager_h 1
 
#include "octave-config.h"
 
#include <map>
#include <set>
#include <string>
 
#include "Cell.h"
#include "graphics-toolkit.h"
 
namespace octave
{
  class gtk_manager
  {
  public:
 
    gtk_manager (void) { }
 
    ~gtk_manager (void)
    {
      unload_all_toolkits ();
    }
 
    graphics_toolkit get_toolkit (void) const;
 
    void register_toolkit (const std::string& name);
 
    void unregister_toolkit (const std::string& name);
 
    void load_toolkit (const graphics_toolkit& tk)
    {
      loaded_toolkits[tk.get_name ()] = tk;
    }
 
    void unload_toolkit (const std::string& name)
    {
      loaded_toolkits.erase (name);
    }
 
    graphics_toolkit find_toolkit (const std::string& name) const
    {
      auto p = loaded_toolkits.find (name);
 
      if (p != loaded_toolkits.end ())
        return p->second;
      else
        return graphics_toolkit ();
    }
 
    Cell available_toolkits_list (void) const
    {
      Cell m (1, available_toolkits.size ());
 
      octave_idx_type i = 0;
      for (const auto& tkit : available_toolkits)
        m(i++) = tkit;
 
      return m;
    }
 
    Cell loaded_toolkits_list (void) const
    {
      Cell m (1, loaded_toolkits.size ());
 
      octave_idx_type i = 0;
      for (const auto& nm_tkit_p : loaded_toolkits)
        m(i++) = nm_tkit_p.first;
 
      return m;
    }
 
    void unload_all_toolkits (void)
    {
      while (! loaded_toolkits.empty ())
        {
          auto p = loaded_toolkits.begin ();
 
          std::string name = p->first;
 
          p->second.close ();
 
          // The toolkit may have unloaded itself.  If not, we'll do it here.
          if (loaded_toolkits.find (name) != loaded_toolkits.end ())
            unload_toolkit (name);
        }
    }
 
    std::string default_toolkit (void) const { return dtk; }
 
  private:
 
    // The name of the default toolkit.
    std::string dtk;
 
    // The list of toolkits that we know about.
    std::set<std::string> available_toolkits;
 
    // The list of toolkits we have actually loaded.
    std::map<std::string, graphics_toolkit> loaded_toolkits;
  };
}
 
#endif