/**********************************************************************

  Audacity: A Digital Audio Editor

  FileFormatPrefs.cpp

  Joshua Haberman
  Dominic Mazzoni
  James Crook


*******************************************************************//**

\class FileFormatPrefs
\brief A PrefsPanel used to select file format preferences and to 
locate the MP3 encoding library.

*//*******************************************************************/

 

#include "../Audacity.h"

#include <wx/defs.h>
#include <wx/intl.h>
#include <wx/stattext.h>
#include <wx/button.h>

#include "../export/ExportMP3.h"
#include "../Prefs.h"
#include "../ShuttleGui.h"
#include "../widgets/LinkingHtmlWindow.h"

#include "FileFormatPrefs.h"

#define ID_MP3_FIND_BUTTON          7001
#define ID_MP3_DOWN_BUTTON          7002

BEGIN_EVENT_TABLE(FileFormatPrefs, wxPanel)
   EVT_BUTTON(ID_MP3_FIND_BUTTON, FileFormatPrefs::OnMP3FindButton)
   EVT_BUTTON(ID_MP3_DOWN_BUTTON, FileFormatPrefs::OnMP3DownButton)
END_EVENT_TABLE()

FileFormatPrefs::FileFormatPrefs(wxWindow * parent):
   PrefsPanel(parent)
{
   SetLabel(_("File Formats"));         // Provide visual label
   SetName(_("File Formats"));          // Provide audible label
   Populate( );
}

/// Creates the dialog and its contents.
void FileFormatPrefs::Populate( )
{
   // First any pre-processing for constructing the GUI.

   //------------------------- Main section --------------------
   // Now construct the GUI itself.
   // Use 'eIsCreatingFromPrefs' so that the GUI is 
   // initialised with values from gPrefs.
   ShuttleGui S(this, eIsCreatingFromPrefs);
   PopulateOrExchange(S);
   // ----------------------- End of main section --------------
   // Set the MP3 Version string.
   SetMP3VersionText();
}

/// This PopulateOrExchange function is a good example of mixing the fully 
/// automatic style of reading/writing from GUI to prefs with the partial form.
/// 
/// You'll notice that some of the Tie functions have Prefs identifiers in them
/// and others don't.  
void FileFormatPrefs::PopulateOrExchange( ShuttleGui & S )
{
   S.SetBorder( 2 );
   S.StartStatic( _("When importing uncompressed audio files into Audacity"));
   {
      S.StartRadioButtonGroup(wxT("/FileFormats/CopyOrEditUncompressedData"),wxT("edit"));
      S.TieRadioButton( _("&Make a copy of the file before editing (safer)"),wxT("copy"));
      S.TieRadioButton( _("&Read directly from the original file (faster)"),wxT("edit"));
      S.EndRadioButtonGroup();
   }
   S.EndStatic();
   S.StartStatic( _("When saving a project that depends on other audio files"));
   {
      S.StartRadioButtonGroup(wxT("/FileFormats/SaveProjectWithDependencies"),wxT("ask"));
      S.TieRadioButton( _("&Ask user"), wxT("ask"));
      S.TieRadioButton( _("Always &copy all audio (safest)"), wxT("copy"));
      S.TieRadioButton( _("&Never copy any audio"), wxT("never"));
      S.EndRadioButtonGroup();
   }
   S.EndStatic();
   S.StartStatic( _("When exporting tracks"));
   {
      S.StartRadioButtonGroup( wxT("/FileFormats/ExportDownMix" ), true );
      S.TieRadioButton( _("A&lways mix all tracks down to Stereo or Mono channel(s)."), true);
      S.TieRadioButton( _("&Use Advanced Mixing Options"),false );
      S.EndRadioButtonGroup();
   }
   S.EndStatic();
   S.StartStatic( _("MP3 Export Setup"));
   {
      S.StartHorizontalLay(wxEXPAND, true);
         S.AddVariableText( _("MP3 Library Version:"),
            true,
            wxALL | wxALIGN_LEFT | wxALIGN_CENTRE_VERTICAL );
         mMP3Version = S.AddVariableText( wxT("9.99"),
            true,
            wxALL | wxALIGN_LEFT | wxALIGN_CENTRE_VERTICAL );
         S.Id( ID_MP3_FIND_BUTTON ).AddButton( _("&Find Library"), 
            wxALL | wxALIGN_LEFT | wxALIGN_CENTRE_VERTICAL );
         S.Id( ID_MP3_DOWN_BUTTON ).AddButton( _("&Download free copy of LAME"), 
            wxALL | wxALIGN_LEFT | wxALIGN_CENTRE_VERTICAL );
      S.EndHorizontalLay();
   }
   S.EndStatic();
}

/// Sets the a text area on the dialog to have the name
/// of the MP3 Library version.
void FileFormatPrefs::SetMP3VersionText(bool prompt)
{
   mMP3Version->SetLabel(GetMP3Version(this, prompt));
}

/// Opens a file-finder dialog so that the user can
/// tell us where the MP3 library is.
void FileFormatPrefs::OnMP3FindButton(wxCommandEvent& evt)
{
   SetMP3VersionText(true);
}

/// Opens a file-finder dialog so that the user can
/// tell us where the MP3 library is.
void FileFormatPrefs::OnMP3DownButton(wxCommandEvent& evt)
{
   wxString url = wxT("http://audacity.sourceforge.net/lame.html");
   ::OpenInDefaultBrowser(url);
}

/// Takes the settings from the dilaog and puts them into prefs.
/// Most of the preferences are set by the ShuttleGui, but for some
/// specially handled ones we need to do this ourselves.
bool FileFormatPrefs::Apply()
{  
   ShuttleGui S( this, eIsSavingToPrefs );
   PopulateOrExchange( S );    
   
   return true;
}

FileFormatPrefs::~FileFormatPrefs()
{
}

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