menus.cpp

来自「VLC媒体播放程序」· C++ 代码 · 共 818 行 · 第 1/2 页

    int i;

    /* Initializations */
    p_intf = _p_intf;

    i_item_id = i_start_id;

    for( i = 0; i < i_count; i++ )
    {
        if( !ppsz_varnames[i] )
        {
            if( b_section_empty )
            {
                Append( MenuDummy_Event + i, wxU(_("Empty")) );
                Enable( MenuDummy_Event + i, FALSE );
            }

            AppendSeparator();
            b_section_empty = VLC_TRUE;
            continue;
        }

        if( !pi_objects[i] )
        {
            Append( MenuDummy_Event, wxU(ppsz_varnames[i]) );
            b_section_empty = VLC_FALSE;
            continue;
        }

        p_object = (vlc_object_t *)vlc_object_get( p_intf, pi_objects[i] );
        if( p_object == NULL ) continue;

        b_section_empty = VLC_FALSE;
        CreateMenuItem( this, ppsz_varnames[i], p_object );
        vlc_object_release( p_object );
    }

    /* Special case for empty menus */
    if( GetMenuItemCount() == 0 || b_section_empty )
    {
        Append( MenuDummy_Event + i, wxU(_("Empty")) );
        Enable( MenuDummy_Event + i, FALSE );
    }
}

Menu::~Menu()
{
}

/*****************************************************************************
 * Private methods.
 *****************************************************************************/
static bool IsMenuEmpty( char *psz_var, vlc_object_t *p_object,
                         bool b_root = TRUE )
{
    vlc_value_t val, val_list;
    int i_type, i_result, i;

    /* Check the type of the object variable */
    i_type = var_Type( p_object, psz_var );

    /* Check if we want to display the variable */
    if( !(i_type & VLC_VAR_HASCHOICE) ) return FALSE;

    var_Change( p_object, psz_var, VLC_VAR_CHOICESCOUNT, &val, NULL );
    if( val.i_int == 0 ) return TRUE;

    if( (i_type & VLC_VAR_TYPE) != VLC_VAR_VARIABLE )
    {
        if( val.i_int == 1 && b_root ) return TRUE;
        else return FALSE;
    }

    /* Check children variables in case of VLC_VAR_VARIABLE */
    if( var_Change( p_object, psz_var, VLC_VAR_GETLIST, &val_list, NULL ) < 0 )
    {
        return TRUE;
    }

    for( i = 0, i_result = TRUE; i < val_list.p_list->i_count; i++ )
    {
        if( !IsMenuEmpty( val_list.p_list->p_values[i].psz_string,
                          p_object, FALSE ) )
        {
            i_result = FALSE;
            break;
        }
    }

    /* clean up everything */
    var_Change( p_object, psz_var, VLC_VAR_FREELIST, &val_list, NULL );

    return i_result;
}

void Menu::CreateMenuItem( wxMenu *menu, char *psz_var,
                           vlc_object_t *p_object )
{
    wxMenuItemExt *menuitem;
    vlc_value_t val, text;
    int i_type;

    /* Check the type of the object variable */
    i_type = var_Type( p_object, psz_var );

    switch( i_type & VLC_VAR_TYPE )
    {
    case VLC_VAR_VOID:
    case VLC_VAR_BOOL:
    case VLC_VAR_VARIABLE:
    case VLC_VAR_STRING:
    case VLC_VAR_INTEGER:
        break;
    default:
        /* Variable doesn't exist or isn't handled */
        return;
    }

    /* Make sure we want to display the variable */
    if( IsMenuEmpty( psz_var, p_object ) ) return;

    /* Get the descriptive name of the variable */
    var_Change( p_object, psz_var, VLC_VAR_GETTEXT, &text, NULL );

    if( i_type & VLC_VAR_HASCHOICE )
    {
        menu->Append( MenuDummy_Event,
                      wxU(text.psz_string ? text.psz_string : psz_var),
                      CreateChoicesMenu( psz_var, p_object, TRUE ),
                      wxT("")/* Nothing for now (maybe use a GETLONGTEXT) */ );

        if( text.psz_string ) free( text.psz_string );
        return;
    }


    switch( i_type & VLC_VAR_TYPE )
    {
    case VLC_VAR_VOID:
        var_Get( p_object, psz_var, &val );
        menuitem = new wxMenuItemExt( menu, ++i_item_id,
                                      wxU(text.psz_string ?
                                        text.psz_string : psz_var),
                                      wxT(""), wxITEM_NORMAL, strdup(psz_var),
                                      p_object->i_object_id, val, i_type );
        menu->Append( menuitem );
        break;

    case VLC_VAR_BOOL:
        var_Get( p_object, psz_var, &val );
        val.b_bool = !val.b_bool;
        menuitem = new wxMenuItemExt( menu, ++i_item_id,
                                      wxU(text.psz_string ?
                                        text.psz_string : psz_var),
                                      wxT(""), wxITEM_CHECK, strdup(psz_var),
                                      p_object->i_object_id, val, i_type );
        menu->Append( menuitem );
        Check( i_item_id, val.b_bool ? FALSE : TRUE );
        break;
    }

    if( text.psz_string ) free( text.psz_string );
}

wxMenu *Menu::CreateChoicesMenu( char *psz_var, vlc_object_t *p_object,
                                 bool b_root )
{
    vlc_value_t val, val_list, text_list;
    int i_type, i;

    /* Check the type of the object variable */
    i_type = var_Type( p_object, psz_var );

    /* Make sure we want to display the variable */
    if( IsMenuEmpty( psz_var, p_object, b_root ) ) return NULL;

    switch( i_type & VLC_VAR_TYPE )
    {
    case VLC_VAR_VOID:
    case VLC_VAR_BOOL:
    case VLC_VAR_VARIABLE:
    case VLC_VAR_STRING:
    case VLC_VAR_INTEGER:
        break;
    default:
        /* Variable doesn't exist or isn't handled */
        return NULL;
    }

    if( var_Change( p_object, psz_var, VLC_VAR_GETLIST,
                    &val_list, &text_list ) < 0 )
    {
        return NULL;
    }

    wxMenu *menu = new wxMenu;
    for( i = 0; i < val_list.p_list->i_count; i++ )
    {
        vlc_value_t another_val;
        wxMenuItemExt *menuitem;

        switch( i_type & VLC_VAR_TYPE )
        {
        case VLC_VAR_VARIABLE:
          menu->Append( MenuDummy_Event,
                        wxU(text_list.p_list->p_values[i].psz_string ?
                        text_list.p_list->p_values[i].psz_string :
                        val_list.p_list->p_values[i].psz_string),
                        CreateChoicesMenu(
                            val_list.p_list->p_values[i].psz_string,
                            p_object, FALSE ), wxT("") );
          break;

        case VLC_VAR_STRING:
          var_Get( p_object, psz_var, &val );

          another_val.psz_string =
              strdup(val_list.p_list->p_values[i].psz_string);
          menuitem =
              new wxMenuItemExt( menu, ++i_item_id,
                                 wxU(text_list.p_list->p_values[i].psz_string ?
                                 text_list.p_list->p_values[i].psz_string :
                                 another_val.psz_string), wxT(""),
                                 i_type & VLC_VAR_ISCOMMAND ?
                                   wxITEM_NORMAL : wxITEM_RADIO,
                                 strdup(psz_var),
                                 p_object->i_object_id, another_val, i_type );

          menu->Append( menuitem );

          if( !(i_type & VLC_VAR_ISCOMMAND) && val.psz_string &&
              !strcmp( val.psz_string,
                       val_list.p_list->p_values[i].psz_string ) )
              menu->Check( i_item_id, TRUE );

          if( val.psz_string ) free( val.psz_string );
          break;

        case VLC_VAR_INTEGER:
          var_Get( p_object, psz_var, &val );

          menuitem =
              new wxMenuItemExt( menu, ++i_item_id,
                                 text_list.p_list->p_values[i].psz_string ?
                                 (wxString)wxU(
                                   text_list.p_list->p_values[i].psz_string) :
                                 wxString::Format(wxT("%d"),
                                 val_list.p_list->p_values[i].i_int), wxT(""),
                                 i_type & VLC_VAR_ISCOMMAND ?
                                   wxITEM_NORMAL : wxITEM_RADIO,
                                 strdup(psz_var),
                                 p_object->i_object_id,
                                 val_list.p_list->p_values[i], i_type );

          menu->Append( menuitem );

          if( !(i_type & VLC_VAR_ISCOMMAND) &&
              val_list.p_list->p_values[i].i_int == val.i_int )
              menu->Check( i_item_id, TRUE );
          break;

        default:
          break;
        }
    }

    /* clean up everything */
    var_Change( p_object, psz_var, VLC_VAR_FREELIST, &val_list, &text_list );

    return menu;
}

void Menu::OnShowDialog( wxCommandEvent& event )
{
    if( p_intf->p_sys->pf_show_dialog )
    {
        int i_id;

        switch( event.GetId() )
        {
        case OpenFileSimple_Event:
            i_id = INTF_DIALOG_FILE_SIMPLE;
            break;
        case OpenFile_Event:
            i_id = INTF_DIALOG_FILE;
            break;
        case OpenDisc_Event:
            i_id = INTF_DIALOG_DISC;
            break;
        case OpenNet_Event:
            i_id = INTF_DIALOG_NET;
            break;
        default:
            i_id = INTF_DIALOG_FILE;
            break;

        }

        p_intf->p_sys->pf_show_dialog( p_intf, i_id, 1, 0 );
    }
}

/*****************************************************************************
 * A small helper class which intercepts all popup menu events
 *****************************************************************************/
MenuEvtHandler::MenuEvtHandler( intf_thread_t *_p_intf,
                                Interface *_p_main_interface )
{
    /* Initializations */
    p_intf = _p_intf;
    p_main_interface = _p_main_interface;
}

MenuEvtHandler::~MenuEvtHandler()
{
}

void MenuEvtHandler::OnShowDialog( wxCommandEvent& event )
{
    if( p_intf->p_sys->pf_show_dialog )
    {
        int i_id;

        switch( event.GetId() )
        {
        case OpenFileSimple_Event:
            i_id = INTF_DIALOG_FILE_SIMPLE;
            break;
        case OpenFile_Event:
            i_id = INTF_DIALOG_FILE;
            break;
        case OpenDisc_Event:
            i_id = INTF_DIALOG_DISC;
            break;
        case OpenNet_Event:
            i_id = INTF_DIALOG_NET;
            break;
        default:
            i_id = INTF_DIALOG_FILE;
            break;

        }

        p_intf->p_sys->pf_show_dialog( p_intf, i_id, 1, 0 );
    }
}

void MenuEvtHandler::OnMenuEvent( wxCommandEvent& event )
{
    wxMenuItem *p_menuitem = NULL;

    /* Check if this is an auto generated menu item */
    if( event.GetId() < FirstAutoGenerated_Event )
    {
        event.Skip();
        return;
    }

    if( !p_main_interface ||
        (p_menuitem = p_main_interface->GetMenuBar()->FindItem(event.GetId()))
        == NULL )
    {
        if( p_intf->p_sys->p_popup_menu )
        {
            p_menuitem = 
                p_intf->p_sys->p_popup_menu->FindItem( event.GetId() );
        }
    }

    if( p_menuitem )
    {
        wxMenuItemExt *p_menuitemext = (wxMenuItemExt *)p_menuitem;
        vlc_object_t *p_object;

        p_object = (vlc_object_t *)vlc_object_get( p_intf,
                                       p_menuitemext->i_object_id );
        if( p_object == NULL ) return;

        var_Set( p_object, p_menuitemext->psz_var, p_menuitemext->val );

        vlc_object_release( p_object );
    }
    else
        event.Skip();
}

/*****************************************************************************
 * A small helper class which encapsulate wxMenuitem with some other useful
 * things.
 *****************************************************************************/
wxMenuItemExt::wxMenuItemExt( wxMenu* parentMenu, int id, const wxString& text,
    const wxString& helpString, wxItemKind kind,
    char *_psz_var, int _i_object_id, vlc_value_t _val, int _i_val_type ):
    wxMenuItem( parentMenu, id, text, helpString, kind )
{
    /* Initializations */
    psz_var = _psz_var;
    i_val_type = _i_val_type;
    i_object_id = _i_object_id;
    val = _val;
};

wxMenuItemExt::~wxMenuItemExt()
{
    if( psz_var ) free( psz_var );
    if( ((i_val_type & VLC_VAR_TYPE) == VLC_VAR_STRING)
        && val.psz_string ) free( val.psz_string );
};