/*****************************************************************************
 * preferences.cpp : wxWindows plugin for vlc
 *****************************************************************************
 * Copyright (C) 2000-2004 the VideoLAN team
 * $Id: edf7de709d769fba38d2c38f15f2bb981098660d $
 *
 * Authors: Gildas Bazin <gbazin@netcourrier.com>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/

#include "dialogs/preferences.hpp"
#include <vlc_config_cat.h>
#include "dialogs/preferences_widgets.h"

#include <wx/combobox.h>
#include <wx/statline.h>
#include <wx/clntdata.h>
#include <wx/dynarray.h>
#include <wx/imaglist.h>
#include <wx/treectrl.h>

#include "bitmaps/type_net.xpm"
#include "bitmaps/codec.xpm"
#include "bitmaps/video.xpm"
#include "bitmaps/type_playlist.xpm"
#include "bitmaps/advanced.xpm"
#include "bitmaps/intf.xpm"
#include "bitmaps/audio.xpm"

#ifndef wxRB_SINGLE
#   define wxRB_SINGLE 0
#endif

#define TYPE_CATEGORY 0
#define TYPE_CATSUBCAT 1  /* Category with embedded subcategory */
#define TYPE_SUBCATEGORY 2
#define TYPE_MODULE 3

/*****************************************************************************
 * Classes declarations.
 *****************************************************************************/
class ConfigTreeData;
class PrefsTreeCtrl : public wxTreeCtrl
{
public:

    PrefsTreeCtrl() { }
    PrefsTreeCtrl( wxWindow *parent, intf_thread_t *_p_intf,
                   PrefsDialog *p_prefs_dialog, wxBoxSizer *_p_sizer );
    virtual ~PrefsTreeCtrl();

    void ApplyChanges();
    void CleanChanges();

private:
    /* Event handlers (these functions should _not_ be virtual) */
    void OnSelectTreeItem( wxTreeEvent& event );
    void OnAdvanced( wxCommandEvent& event );

    ConfigTreeData *FindModuleConfig( ConfigTreeData *config_data );

    DECLARE_EVENT_TABLE()

    intf_thread_t *p_intf;
    PrefsDialog *p_prefs_dialog;
    wxBoxSizer *p_sizer;
    wxWindow *p_parent;
    bool b_advanced;

    wxPanel *p_current;

    wxTreeItemId root_item;
    wxTreeItemId plugins_item;
};

WX_DEFINE_ARRAY(ConfigControl *, ArrayOfConfigControls);

class PrefsPanel : public wxPanel
{
public:

    PrefsPanel() { }
    PrefsPanel( wxWindow *parent, intf_thread_t *_p_intf,
                PrefsDialog *, ConfigTreeData* );
    virtual ~PrefsPanel() {}

    void ApplyChanges();
    void SwitchAdvanced( bool );

private:
    intf_thread_t *p_intf;
    PrefsDialog *p_prefs_dialog;

    bool b_advanced;

    wxStaticText *hidden_text;
    wxBoxSizer *config_sizer;
    wxScrolledWindow *config_window;

    ArrayOfConfigControls config_array;
};

class ConfigTreeData : public wxTreeItemData
{
public:

    ConfigTreeData() { b_submodule = 0; panel = NULL; psz_name = NULL;
                       psz_help = NULL; }
    virtual ~ConfigTreeData() {
                                 delete panel;
                                 free( psz_name );
                                 free( psz_help );
                              };

    bool b_submodule;

    PrefsPanel *panel;
    wxBoxSizer *sizer;

    module_t *p_module;
    int i_object_id;
    int i_subcat_id;
    int i_type;
    char *psz_name;
    char *psz_help;
};

/*****************************************************************************
 * Event Table.
 *****************************************************************************/

/* IDs for the controls and the menu commands */
enum
{
    Notebook_Event = wxID_HIGHEST,
    MRL_Event,
    ResetAll_Event,
    Advanced_Event,
};

BEGIN_EVENT_TABLE(PrefsDialog, wxFrame)
    /* Button events */
    EVT_BUTTON(wxID_OK, PrefsDialog::OnOk)
    EVT_BUTTON(wxID_CANCEL, PrefsDialog::OnCancel)
    EVT_BUTTON(wxID_SAVE, PrefsDialog::OnSave)
    EVT_BUTTON(ResetAll_Event, PrefsDialog::OnResetAll)
    EVT_CHECKBOX(Advanced_Event, PrefsDialog::OnAdvanced)

    /* Don't destroy the window when the user closes it */
    EVT_CLOSE(PrefsDialog::OnClose)
END_EVENT_TABLE()

// menu and control ids
enum
{
    PrefsTree_Ctrl = wxID_HIGHEST
};

BEGIN_EVENT_TABLE(PrefsTreeCtrl, wxTreeCtrl)
    EVT_TREE_SEL_CHANGED(PrefsTree_Ctrl, PrefsTreeCtrl::OnSelectTreeItem)
    EVT_COMMAND(Advanced_Event, wxEVT_USER_FIRST, PrefsTreeCtrl::OnAdvanced)
END_EVENT_TABLE()

/*****************************************************************************
 * Constructor.
 *****************************************************************************/
PrefsDialog::PrefsDialog( intf_thread_t *_p_intf, wxWindow *p_parent)
  :  wxFrame( p_parent, -1, wxU(_("Preferences")), wxDefaultPosition,
              wxSize(700,450), wxDEFAULT_FRAME_STYLE )
{
    /* Initializations */
    p_intf = _p_intf;
    SetIcon( *p_intf->p_sys->p_icon );

    /* Create a panel to put everything in */
    wxPanel *panel = new wxPanel( this, -1 );
    panel->SetAutoLayout( TRUE );

    /* Create the preferences tree control */
    wxBoxSizer *controls_sizer = new wxBoxSizer( wxHORIZONTAL );
    prefs_tree =
        new PrefsTreeCtrl( panel, p_intf, this, controls_sizer );

    /* Separation */
    wxStaticLine *static_line = new wxStaticLine( panel, wxID_OK );

#if 0
    /* Create the buttons */
    wxButton *ok_button = new wxButton( panel, wxID_OK, wxU(_("OK")) );
    ok_button->SetDefault();
#endif
    wxButton *save_button = new wxButton( panel, wxID_SAVE, wxU(_("&Save")) );
    save_button->SetDefault();
    wxButton *cancel_button = new wxButton( panel, wxID_CANCEL,
                                            wxU(_("&Cancel")) );
    wxButton *reset_button = new wxButton( panel, ResetAll_Event,
                                           wxU(_("Reset All")) );

    wxPanel *dummy_panel = new wxPanel( this, -1 );
    wxCheckBox *advanced_checkbox =
        new wxCheckBox( panel, Advanced_Event, wxU(_("Advanced options")) );

    if( config_GetInt( p_intf, "advanced" ) )
    {
        advanced_checkbox->SetValue(TRUE);
        wxCommandEvent dummy_event;
        dummy_event.SetInt(TRUE);
        OnAdvanced( dummy_event );
    }

    /* Place everything in sizers */
    wxBoxSizer *button_sizer = new wxBoxSizer( wxHORIZONTAL );
#if 0
    button_sizer->Add( ok_button, 0, wxALL, 5 );
#endif
    button_sizer->Add( save_button, 0, wxALL, 5 );
    button_sizer->Add( cancel_button, 0, wxALL, 5 );
    button_sizer->Add( reset_button, 0, wxALL, 5 );
    button_sizer->Add( dummy_panel, 1, wxALL, 5 );
    button_sizer->Add( advanced_checkbox, 0, wxALL | wxALIGN_RIGHT |
                       wxALIGN_CENTER_VERTICAL, 0 );
    button_sizer->Layout();

    wxBoxSizer *main_sizer = new wxBoxSizer( wxVERTICAL );
    wxBoxSizer *panel_sizer = new wxBoxSizer( wxVERTICAL );
    panel_sizer->Add( controls_sizer, 1, wxEXPAND | wxALL, 5 );
    panel_sizer->Add( static_line, 0, wxEXPAND | wxALL, 5 );
    panel_sizer->Add( button_sizer, 0, wxALIGN_LEFT | wxALIGN_BOTTOM |
                      wxALL | wxEXPAND, 5 );
    panel_sizer->Layout();
    panel->SetSizer( panel_sizer );
    main_sizer->Add( panel, 1, wxEXPAND, 0 );
    main_sizer->Layout();
    SetSizer( main_sizer );
}

PrefsDialog::~PrefsDialog()
{
}

/*****************************************************************************
 * Private methods.
 *****************************************************************************/


/*****************************************************************************
 * Events methods.
 *****************************************************************************/
void PrefsDialog::OnOk( wxCommandEvent& WXUNUSED(event) )
{
    prefs_tree->ApplyChanges();
    this->Hide();
    prefs_tree->CleanChanges();
}

void PrefsDialog::OnClose( wxCloseEvent& WXUNUSED(event) )
{
    wxCommandEvent cevent;
    OnCancel(cevent);
}

void PrefsDialog::OnCancel( wxCommandEvent& WXUNUSED(event) )
{
    this->Hide();
    prefs_tree->CleanChanges();
}

void PrefsDialog::OnSave( wxCommandEvent& WXUNUSED(event) )
{
    prefs_tree->ApplyChanges();
    config_SaveConfigFile( p_intf, NULL );
    this->Hide();
}

void PrefsDialog::OnResetAll( wxCommandEvent& WXUNUSED(event) )
{
    wxMessageDialog dlg( this,
        wxU(_("This will reset your VLC media player preferences.\n"
              "Are you sure you want to continue?")),
        wxU(_("Reset Preferences")), wxYES_NO|wxNO_DEFAULT|wxCENTRE );

    if ( dlg.ShowModal() == wxID_YES )
    {
        /* TODO: need to reset all the controls */
        config_ResetAll( p_intf );
        prefs_tree->CleanChanges();
        config_SaveConfigFile( p_intf, NULL );
    }
}

void PrefsDialog::OnAdvanced( wxCommandEvent& event )
{
    wxCommandEvent newevent( wxEVT_USER_FIRST, Advanced_Event );
    newevent.SetInt( event.GetInt() );

    prefs_tree->AddPendingEvent( newevent );
}

/*****************************************************************************
 * PrefsTreeCtrl class definition.
 *****************************************************************************/
PrefsTreeCtrl::PrefsTreeCtrl( wxWindow *_p_parent, intf_thread_t *_p_intf,
                              PrefsDialog *_p_prefs_dialog,
                              wxBoxSizer *_p_sizer )
  : wxTreeCtrl( _p_parent, PrefsTree_Ctrl, wxDefaultPosition, wxSize(200,-1),
                wxTR_NO_LINES | wxTR_FULL_ROW_HIGHLIGHT |
                wxTR_LINES_AT_ROOT | wxTR_HIDE_ROOT |
                wxTR_HAS_BUTTONS | wxTR_TWIST_BUTTONS | wxSUNKEN_BORDER )
{
    vlc_list_t      *p_list = NULL;;
    module_t        *p_module;
    module_config_t *p_item, *p_end;
    int i_index, i_image=0;

    /* Initializations */
    p_intf = _p_intf;
    p_prefs_dialog = _p_prefs_dialog;
    p_sizer = _p_sizer;
    p_parent = _p_parent;
    b_advanced = false;

    root_item = AddRoot( wxT("") );
    wxASSERT_MSG(root_item.IsOk(), wxT("Could not add root item"));

    wxImageList *p_images = new wxImageList( 16,16,TRUE );
    p_images->Add( wxIcon( audio_xpm ) );
    p_images->Add( wxIcon( video_xpm ) );
    p_images->Add( wxIcon( codec_xpm ) );
    p_images->Add( wxIcon( type_net_xpm ) );
    p_images->Add( wxIcon( advanced_xpm ) );
    p_images->Add( wxIcon( type_playlist_xpm ) );
    p_images->Add( wxIcon( intf_xpm ) );
    AssignImageList( p_images );

    /* List the plugins */
    p_list = vlc_list_find( p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
    if( !p_list ) return;

    /* Build the categories list */
    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        p_module = (module_t *)p_list->p_values[i_index].p_object;
        if( !strcmp( module_GetObjName(p_module), "main" ) )
            break;
    }
    if( i_index < p_list->i_count )
    {
        wxTreeItemId current_item;
        const char *psz_help;
        unsigned int i_confsize;
        module_config_t *p_config;

        /* We found the main module */

        /* Enumerate config categories and store a reference so we can
         * generate their config panel them when it is asked by the user. */

        p_config = module_GetConfig( p_module, &i_confsize );
        for( size_t i = 0; i < i_confsize; i++ )
        {
            module_config_t *p_item = p_config + i;
            ConfigTreeData *config_data;
            switch( p_item->i_type )
            {
            case CONFIG_CATEGORY:
                if( p_item->value.i == -1 )   break; // Don't display it

                config_data = new ConfigTreeData;
                config_data->psz_name = strdup( config_CategoryNameGet(
                                                            p_item->value.i ) );
                psz_help = config_CategoryHelpGet( p_item->value.i );
                if( psz_help )
                {
                    config_data->psz_help = wraptext( strdup( psz_help ), 72 );
                }
                else
                {
                    config_data->psz_help = NULL;
                }
                config_data->i_type = TYPE_CATEGORY;
                config_data->i_object_id = p_item->value.i;

                /* Add the category to the tree */
                switch( p_item->value.i )
                {
                    case CAT_AUDIO:
                        i_image = 0; break;
                    case CAT_VIDEO:
                        i_image = 1; break;
                    case CAT_INPUT:
                        i_image = 2; break;
                    case CAT_SOUT:
                        i_image = 3; break;
                    case CAT_ADVANCED:
                        i_image = 4; break;
                    case CAT_PLAYLIST:
                        i_image = 5; break;
                    case CAT_INTERFACE:
                        i_image = 6; break;
                }
                current_item = AppendItem( root_item,
                                           wxU( _(config_data->psz_name) ),
                                           i_image, -1, config_data );

                break;
            case CONFIG_SUBCATEGORY:
                if( p_item->value.i == -1 ) break; // Don't display it
                /* Special case: move the "general" subcategories to their
                 * parent category */
                if( p_item->value.i == SUBCAT_VIDEO_GENERAL ||
                    p_item->value.i == SUBCAT_ADVANCED_MISC ||
                    p_item->value.i == SUBCAT_INPUT_GENERAL ||
                    p_item->value.i == SUBCAT_INTERFACE_GENERAL ||
                    p_item->value.i == SUBCAT_SOUT_GENERAL||
                    p_item->value.i == SUBCAT_PLAYLIST_GENERAL||
                    p_item->value.i == SUBCAT_AUDIO_GENERAL )
                {
                    ConfigTreeData *cd = (ConfigTreeData *)
                                            GetItemData( current_item );
                    cd->i_type = TYPE_CATSUBCAT;
                    cd->i_subcat_id = p_item->value.i;
                    free( cd->psz_name );
                    cd->psz_name = strdup(  config_CategoryNameGet(
                                                      p_item->value.i ) );
                    free( cd->psz_help );
                    const char *psz_help = config_CategoryHelpGet( p_item->value.i );
                    if( psz_help )
                    {
                        cd->psz_help = wraptext( strdup( psz_help ), 72 );
                    }
                    else
                    {
                        cd->psz_help = NULL;
                    }
                    continue;
                }

                config_data = new ConfigTreeData;

                config_data->psz_name = strdup(  config_CategoryNameGet(
                                                           p_item->value.i ) );
                psz_help = config_CategoryHelpGet( p_item->value.i );
                if( psz_help )
                {
                    config_data->psz_help = wraptext( strdup( psz_help ), 72 );
                }
                else
                {
                    config_data->psz_help = NULL;
                }
                config_data->i_type = TYPE_SUBCATEGORY;
                config_data->i_object_id = p_item->value.i;
                /* WXMSW doesn't know image -1 ... FIXME */
                #ifdef __WXMSW__
                switch( p_item->value.i / 100 )
                {
                    case CAT_AUDIO:
                        i_image = 0; break;
                    case CAT_VIDEO:
                        i_image = 1; break;
                    case CAT_INPUT:
                        i_image = 2; break;
                    case CAT_SOUT:
                        i_image = 3; break;
                    case CAT_ADVANCED:
                        i_image = 4; break;
                    case CAT_PLAYLIST:
                        i_image = 5; break;
                    case CAT_INTERFACE:
                        i_image = 6; break;
                }
                #else
                i_image = -1;
                #endif
                AppendItem( current_item, wxU( _(config_data->psz_name) ),
                            i_image, -1, config_data );
                break;
            }
        }

        module_PutConfig( p_config );
    }


    /*
     * Build a tree of all the plugins
     */
    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        int i_category = -1, i_subcategory = -1, i_options = 0;
        unsigned int i_confsize;
        module_config_t *p_config;

        p_module = (module_t *)p_list->p_values[i_index].p_object;

        /* Exclude the main module */
        if( !strcmp( module_GetObjName(p_module), "main" ) )
            continue;
#if 0
        /* Exclude empty plugins (submodules don't have config options, they
         * are stored in the parent module) */
        if( module_IsSubModule(p_module) )
            continue;
#endif
        p_config = module_GetConfig( p_module, &i_confsize );
        for( size_t i = 0; i < i_confsize; i++ )
        {
            module_config_t *p_item = p_config + i;
            if( p_item->i_type == CONFIG_CATEGORY )
            {
                i_category = p_item->value.i;
            }
            else if( p_item->i_type == CONFIG_SUBCATEGORY )
            {
                i_subcategory = p_item->value.i;
            }
            if( p_item->i_type & CONFIG_ITEM )
                i_options ++;
            if( i_options > 0 && i_category >= 0 && i_subcategory >= 0 )
            {
                break;
            }
        }

        if( !i_options ) continue;

        /* Find the right category item */
        wxTreeItemIdValue cookie;
        bool b_found = false;

        wxTreeItemId category_item = GetFirstChild( root_item , cookie);
        while( category_item.IsOk() )
        {
            ConfigTreeData *config_data =
                    (ConfigTreeData *)GetItemData( category_item );
            if( config_data->i_object_id == i_category )
            {
                b_found = true;
                break;
            }
            category_item = GetNextChild( root_item, cookie );
        }
        if( !b_found ) continue;

        /* Find subcategory item */
        b_found = false;
        //cookie = -1;
        wxTreeItemId subcategory_item = GetFirstChild( category_item, cookie );
        while( subcategory_item.IsOk() )
        {
            ConfigTreeData *config_data =
                    (ConfigTreeData *)GetItemData( subcategory_item );
            if( config_data->i_object_id == i_subcategory )
            {
                b_found = true;
                break;
            }
            subcategory_item = GetNextChild( category_item, cookie );
        }
        if( !b_found )
        {
            subcategory_item = category_item;
        }

        /* Add the plugin to the tree */
        ConfigTreeData *config_data = new ConfigTreeData;
#if 0
        config_data->b_submodule = module_IsSubModule(p_module);
#endif
        config_data->i_type = TYPE_MODULE;
        config_data->p_module = config_data->b_submodule ?
            ((module_t*)((vlc_object_t*)p_module)->p_parent) : p_module;
        config_data->psz_help = NULL;

        /* WXMSW doesn't know image -1 ... FIXME */
        #ifdef __WXMSW__
        switch( i_subcategory / 100 )
        {
            case CAT_AUDIO:
                i_image = 0; break;
            case CAT_VIDEO:
                i_image = 1; break;
            case CAT_INPUT:
                i_image = 2; break;
            case CAT_SOUT:
                i_image = 3; break;
            case CAT_ADVANCED:
                i_image = 4; break;
            case CAT_PLAYLIST:
                i_image = 5; break;
            case CAT_INTERFACE:
                i_image = 6; break;
        }
        #else
        i_image = -1;
        #endif
        AppendItem( subcategory_item, wxU( module_GetName(p_module, 0) ),
                    i_image, -1, config_data );
    }

    /* Sort all this mess */
    wxTreeItemIdValue cookie;
    size_t i_child_index;
    wxTreeItemId capability_item = GetFirstChild( root_item, cookie);
    for( i_child_index = 0;
         (capability_item.IsOk() &&
          //(i_child_index < GetChildrenCount( plugins_item, FALSE )));
          (i_child_index < GetChildrenCount( root_item, FALSE )));
         i_child_index++ )
    {
        SortChildren( capability_item );
        //capability_item = GetNextChild( plugins_item, cookie );
        capability_item = GetNextChild( root_item, cookie );
    }

    /* Clean-up everything */
    vlc_list_release( p_list );

    p_sizer->Add( this, 1, wxEXPAND | wxALL, 0 );
    p_sizer->Layout();

    p_current = NULL;

    /* Update Tree Ctrl */
#ifndef WIN32 /* Workaround a bug in win32 implementation */
    SelectItem( GetFirstChild( root_item, cookie ) );
#endif

    //cannot expand hidden root item
    //Expand( root_item );
}

PrefsTreeCtrl::~PrefsTreeCtrl(){
}

void PrefsTreeCtrl::ApplyChanges()
{
    wxTreeItemIdValue cookie, cookie2, cookie3;
    ConfigTreeData *config_data;

    wxTreeItemId category = GetFirstChild( root_item, cookie );
    while( category.IsOk() )
    {
        wxTreeItemId subcategory = GetFirstChild( category, cookie2 );
        while( subcategory.IsOk() )
        {
            wxTreeItemId module = GetFirstChild( subcategory, cookie3 );
            while( module.IsOk() )
            {
                config_data = (ConfigTreeData *)GetItemData( module );
                if( config_data && config_data->panel )
                {
                    config_data->panel->ApplyChanges();
                }
                module = GetNextChild( subcategory, cookie3 );
            }
            config_data = (ConfigTreeData *)GetItemData( subcategory );
            if( config_data && config_data->panel )
            {
                config_data->panel->ApplyChanges();
            }
            subcategory = GetNextChild( category, cookie2 );
        }
        config_data = (ConfigTreeData *)GetItemData( category );
        if( config_data && config_data->panel )
        {
            config_data->panel->ApplyChanges();
        }
        category = GetNextChild( root_item, cookie );
    }
}

void PrefsTreeCtrl::CleanChanges()
{
    wxTreeItemIdValue cookie, cookie2, cookie3;
    ConfigTreeData *config_data;

    config_data = !GetSelection() ? NULL :
        FindModuleConfig( (ConfigTreeData *)GetItemData( GetSelection() ) );
    if( config_data  )
    {
        config_data->panel->Hide();
#if (wxCHECK_VERSION(2,5,0))
        p_sizer->Detach( config_data->panel );
#else
        p_sizer->Remove( config_data->panel );
#endif
        p_current = NULL;
    }

    wxTreeItemId category = GetFirstChild( root_item, cookie );
    while( category.IsOk() )
    {
        wxTreeItemId subcategory = GetFirstChild( category, cookie2 );
        while( subcategory.IsOk() )
        {
            wxTreeItemId module = GetFirstChild( subcategory, cookie3 );
            while( module.IsOk() )
            {
                config_data = (ConfigTreeData *)GetItemData( module );
                if( config_data && config_data->panel )
                {
                    delete config_data->panel;
                    config_data->panel = NULL;
                }
                module = GetNextChild( subcategory, cookie3 );
            }
            config_data = (ConfigTreeData *)GetItemData( subcategory );
            if( config_data && config_data->panel )
            {
                delete config_data->panel;
                config_data->panel = NULL;
            }
            subcategory = GetNextChild( category, cookie2 );
        }
        config_data = (ConfigTreeData *)GetItemData( category );
        if( config_data && config_data->panel )
        {
            delete config_data->panel;
            config_data->panel = NULL;
        }
        category = GetNextChild( root_item, cookie );
    }

    if( GetSelection() )
    {
        wxTreeEvent event;
        OnSelectTreeItem( event );
    }
}

ConfigTreeData *PrefsTreeCtrl::FindModuleConfig( ConfigTreeData *config_data )
{
    /* We need this complexity because submodules don't have their own config
     * options. They use the parent module ones. */

    if( !config_data || !config_data->b_submodule )
    {
        return config_data;
    }

    wxTreeItemIdValue cookie, cookie2, cookie3;
    ConfigTreeData *config_new;
    wxTreeItemId category = GetFirstChild( root_item, cookie );
    while( category.IsOk() )
    {
        wxTreeItemId subcategory = GetFirstChild( category, cookie2 );
        while( subcategory.IsOk() )
        {
            wxTreeItemId module = GetFirstChild( subcategory, cookie3 );
            while( module.IsOk() )
            {
                config_new = (ConfigTreeData *)GetItemData( module );
                if( config_new && !config_new->b_submodule &&
                    config_new->p_module == config_data->p_module )
                {
                    return config_new;
                }
                module = GetNextChild( subcategory, cookie3 );
            }
            subcategory = GetNextChild( category, cookie2 );
        }
        category = GetNextChild( root_item, cookie );
    }

    /* Found nothing */
    return NULL;
}

void PrefsTreeCtrl::OnSelectTreeItem( wxTreeEvent& event )
{
    ConfigTreeData *config_data = NULL;

    if( p_current )
    {
        p_current->Hide();
#if (wxCHECK_VERSION(2,5,0))
        p_sizer->Detach( p_current  );
#else
        p_sizer->Remove( p_current );
#endif
        p_current = NULL;
    }

    /* Don't use event.GetItem() because we also send fake events */
    config_data = FindModuleConfig( (ConfigTreeData *)GetItemData(
                                    GetSelection() ) );
    if( config_data )
    {
        if( !config_data->panel )
        {
            /* The panel hasn't been created yet. Let's do it. */
            config_data->panel =
                new PrefsPanel( p_parent, p_intf, p_prefs_dialog,
                                config_data );
            config_data->panel->SwitchAdvanced( b_advanced );
        }
        else
        {
            config_data->panel->SwitchAdvanced( b_advanced );
            config_data->panel->Show();
        }

        p_current = config_data->panel;

        p_sizer->Add( config_data->panel, 3, wxEXPAND | wxALL, 0 );
        p_sizer->Layout();
    }
}

void PrefsTreeCtrl::OnAdvanced( wxCommandEvent& event )
{
    b_advanced = event.GetInt();

    ConfigTreeData *config_data = !GetSelection() ? NULL :
        FindModuleConfig( (ConfigTreeData *)GetItemData( GetSelection() ) );
    if( config_data  )
    {
        config_data->panel->Hide();
#if (wxCHECK_VERSION(2,5,0))
        p_sizer->Detach( config_data->panel );
#else
        p_sizer->Remove( config_data->panel );
#endif
        p_current = NULL;
    }

    if( GetSelection() )
    {
        wxTreeEvent event;
        OnSelectTreeItem( event );
    }
}

/*****************************************************************************
 * PrefsPanel class definition.
 *****************************************************************************/
PrefsPanel::PrefsPanel( wxWindow* parent, intf_thread_t *_p_intf,
                        PrefsDialog *_p_prefs_dialog,
                        ConfigTreeData *config_data )
  :  wxPanel( parent, -1, wxDefaultPosition, wxDefaultSize )
{
    module_config_t *p_item, *p_start, *p_end;
    unsigned int i_confsize;
    vlc_list_t *p_list = NULL;;

    wxStaticText *label;
    wxStaticText *help;
    wxArrayString array;

    module_t *p_module = NULL;

    /* Initializations */
    p_intf = _p_intf;
    p_prefs_dialog =_p_prefs_dialog,

    b_advanced = true;
    SetAutoLayout( TRUE );
    Hide();

    wxBoxSizer *sizer = new wxBoxSizer( wxVERTICAL );


    if( config_data->i_type == TYPE_CATEGORY )
    {
        label = new wxStaticText( this, -1,wxU(_( config_data->psz_name )));
        wxFont heading_font = label->GetFont();
        heading_font.SetPointSize( heading_font.GetPointSize() + 5 );
        label->SetFont( heading_font );
        sizer->Add( label, 0, wxEXPAND | wxLEFT, 10 );
        sizer->Add( new wxStaticLine( this, 0 ), 0,
                    wxEXPAND | wxLEFT | wxRIGHT, 2 );

        hidden_text = NULL;
        help = new wxStaticText( this, -1, wxU(_( config_data->psz_help ) ) );
        sizer->Add( help ,0 ,wxEXPAND | wxALL, 5 );

        config_sizer = NULL; config_window = NULL;
    }
    else
    {
        /* Get a pointer to the module */
        if( config_data->i_type == TYPE_MODULE )
        {
            p_module = config_data->p_module;
        }
        else
        {
            /* List the plugins */
            int i_index;
            bool b_found = false;
            p_list = vlc_list_find( p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
            if( !p_list ) return;

            for( i_index = 0; i_index < p_list->i_count; i_index++ )
            {
                p_module = (module_t *)p_list->p_values[i_index].p_object;
                if( !strcmp( module_GetObjName(p_module), "main" ) )
                {
                    b_found = true;
                    break;
                }
            }
            if( !p_module && !b_found )
            {
                msg_Warn( p_intf, "unable to create preferences "
                                  "(main module not found)" );
                return;
            }
        }

        /* Enumerate config options and add corresponding config boxes
         * (submodules don't have config options, they are stored in the
         *  parent module) */
#if 0
        if( module_IsSubModule(p_module) )
            p_start = module_GetConfig((module_t *)(((vlc_object_t *)p_module)->p_parent), &i_confsize);
        else
#endif
            p_start = module_GetConfig(p_module, &i_confsize);

        p_item = p_start;
        p_end = p_start + i_confsize;

        /* Find the category if it has been specified */
        if( config_data->i_type == TYPE_SUBCATEGORY ||
            config_data->i_type == TYPE_CATSUBCAT )
        {
            for( ; p_item && p_item < p_end; p_item++ )
            {
                if( p_item->i_type == CONFIG_SUBCATEGORY &&
                    ( config_data->i_type == TYPE_SUBCATEGORY &&
                      p_item->value.i == config_data->i_object_id ) ||
                    ( config_data->i_type == TYPE_CATSUBCAT &&
                      p_item->value.i == config_data->i_subcat_id ) )
                {
                    break;
                }
            }
        }

        /* Add a head title to the panel */
        const char *psz_head;
        if( config_data->i_type == TYPE_SUBCATEGORY ||
            config_data->i_type == TYPE_CATSUBCAT )
        {
            psz_head = config_data->psz_name;
            p_item++;
        }
        else
        {
            psz_head = module_GetLongName(p_module);
        }

        label = new wxStaticText( this, -1,
                      wxU(_( psz_head ? psz_head : _("Unknown") ) ) );
        wxFont heading_font = label->GetFont();
        heading_font.SetPointSize( heading_font.GetPointSize() + 5 );
        label->SetFont( heading_font );
        sizer->Add( label, 0, wxEXPAND | wxLEFT, 10 );
        sizer->Add( new wxStaticLine( this, 0 ), 0,
                    wxEXPAND | wxLEFT | wxRIGHT, 2 );

        /* Now put all the config options into a scrolled window */
        config_sizer = new wxBoxSizer( wxVERTICAL );
        config_window = new wxScrolledWindow( this, -1, wxDefaultPosition,
            wxDefaultSize, wxBORDER_NONE | wxHSCROLL | wxVSCROLL );
        config_window->SetAutoLayout( TRUE );
        config_window->SetScrollRate( 5, 5 );

        for( ; p_item && p_item < p_end; p_item++ )
        {
            /* If a category has been specified, check we finished the job */
            if( ( ( config_data->i_type == TYPE_SUBCATEGORY &&
                    p_item->value.i != config_data->i_object_id ) ||
                  ( config_data->i_type == TYPE_CATSUBCAT  &&
                    p_item->value.i != config_data->i_subcat_id ) ) &&
                (p_item->i_type == CONFIG_CATEGORY ||
                  p_item->i_type == CONFIG_SUBCATEGORY ) )
                break;

            ConfigControl *control =
                CreateConfigControl( VLC_OBJECT(p_intf),
                                     p_item, config_window );

            /* Don't add items that were not recognized */
            if( control == NULL ) continue;

            /* Add the config data to our array so we can keep a trace of it */
            config_array.Add( control );

            config_sizer->Add( control, 0, wxEXPAND | wxALL, 2 );
        }

        module_PutConfig( p_start );

        config_sizer->Layout();
        config_window->SetSizer( config_sizer );
        sizer->Add( config_window, 1, wxEXPAND | wxALL, 5 );
        hidden_text = new wxStaticText( this, -1,
                        wxU( _( "Some options are available but hidden. " \
                                "Check \"Advanced options\" to see them." ) ) );
        sizer->Add( hidden_text );

        /* And at last put a useful help string if available */
        if( config_data->psz_help && *config_data->psz_help )
        {
            sizer->Add( new wxStaticLine( this, 0 ), 0,
                        wxEXPAND | wxLEFT | wxRIGHT, 2 );
            help = new wxStaticText( this, -1, wxU(_(config_data->psz_help)),
                                     wxDefaultPosition, wxDefaultSize,
                                     wxALIGN_LEFT,
                                     wxT("") );
            sizer->Add( help ,0 ,wxEXPAND | wxALL, 5 );
        }

        if( config_data->i_type == TYPE_MODULE )
        {
            module_Put( p_module );
        }
        else
        {
            vlc_list_release( p_list );
        }
    }
    sizer->Layout();
    SetSizer( sizer );
    Show();
}

void PrefsPanel::ApplyChanges()
{
    vlc_value_t val;

    for( size_t i = 0; i < config_array.GetCount(); i++ )
    {
        ConfigControl *control = config_array.Item(i);

        switch( control->GetType() )
        {
        case CONFIG_ITEM_STRING:
        case CONFIG_ITEM_FILE:
        case CONFIG_ITEM_DIRECTORY:
        case CONFIG_ITEM_MODULE:
        case CONFIG_ITEM_MODULE_CAT:
        case CONFIG_ITEM_MODULE_LIST:
        case CONFIG_ITEM_MODULE_LIST_CAT:
            config_PutPsz( p_intf, control->GetName().mb_str(wxConvUTF8),
                           control->GetPszValue().mb_str(wxConvUTF8) );
            break;
        case CONFIG_ITEM_KEY:
            /* So you don't need to restart to have the changes take effect */
            val.i_int = control->GetIntValue();
            var_Set( p_intf->p_libvlc, control->GetName().mb_str(wxConvUTF8), val );
        case CONFIG_ITEM_INTEGER:
        case CONFIG_ITEM_BOOL:
            config_PutInt( p_intf, control->GetName().mb_str(wxConvUTF8),
                           control->GetIntValue() );
            break;
        case CONFIG_ITEM_FLOAT:
            config_PutFloat( p_intf, control->GetName().mb_str(wxConvUTF8),
                             control->GetFloatValue() );
            break;
        }
    }
}

void PrefsPanel::SwitchAdvanced( bool b_new_advanced )
{
    bool hidden = false;

    if( b_advanced == b_new_advanced )
    {
        goto hide;
    }

    if( config_sizer && config_window )
    {
        b_advanced = b_new_advanced;

        for( size_t i = 0; i < config_array.GetCount(); i++ )
        {
            ConfigControl *control = config_array.Item(i);
            if( control->IsAdvanced() )
            {
                if( !b_advanced ) hidden = true;
                control->Show( b_advanced );
                config_sizer->Show( control, b_advanced );
            }
        }

        config_sizer->Layout();
        config_window->FitInside();
        config_window->Refresh();
    }
hide:
    if( hidden && hidden_text )
    {
        hidden_text->Show( true );
        config_sizer->Show( hidden_text, true );
    }
    else if ( hidden_text )
    {
        hidden_text->Show( false );
        config_sizer->Show( hidden_text, false );
    }
    return;
}
