c++ - wxDataViewListCtrl 单击项目操作未执行

Question

当一个项目被点击时，我有一个wxDataViewListCtrl绑定的，

    Bind(wxEVT_DATAVIEW_SELECTION_CHANGED, &Browser::OnClickSampleView, this, BCID_SampleListView);

相关的功能是，

void Browser::OnClickSampleView(wxDataViewEvent& event)
{
    std::cout << "\n Click Sample View \n";

    std::string selection = SampleListView->GetTextValue(SampleListView->GetSelectedRow(), 1).ToStdString();

    std::cout << selection << "\n";
}

但是当我点击一个项目时什么都没有发生，没有任何东西打印到控制台没有错误。我究竟做错了什么？

我已经尝试在没有 ID 的情况下绑定它SampleListView->Bind()，也没有运气。

我在 wxWidgets 论坛上问了这个问题，但是没有人能够弄清楚问题所在，有人让我试试这个，

SampleListView->Bind(wxEVT_DATAVIEW_SELECTION_CHANGED, [this](wxDataViewEvent &e) { 
    wxLogDebug("dataviewevent row %d", SampleListView->ItemToRow(e.GetItem()));
});

这有效，它可以很好地打印到控制台，

18:07:06: Debug: dataviewevent row 0
18:07:07: Debug: dataviewevent row 1
18:07:09: Debug: dataviewevent row 2
18:07:10: Debug: dataviewevent row 3

链接到该项目的行，其中有Bind()- https://gitlab.com/apoorv569/cpp-projects/-/blob/master/wxWidgets/SampleBrowser/src/Browser.cpp#L142

编辑：

在对该应用程序进行了一些试验后，我注意到在我向 wxDataViewListCtrl 添加单个条目后，所有按钮和我捕获事件的所有内容都停止工作，因此我进一步调查了我用来添加数据的函数对于 wxDataViewListCtrl，我也将所有数据插入到 Sqlite3 数据库中，我注意到如果我注释该行，将数据插入到 Sqlite3 数据库中，一切正常。

void Browser::OnClickDirCtrl(wxCommandEvent& event)
{
    TagLib::FileRef File (DirCtrl->GetFilePath());
    TagLib::String Artist = File.tag()->artist();
    TagLib::String Album = File.tag()->album();
    TagLib::String Genre = File.tag()->genre();
    TagLib::String Title = File.tag()->title();
    TagLib::String Comment = File.tag()->comment();
    int Bitrate = File.audioProperties()->bitrate();
    int Channels = File.audioProperties()->channels();
    int Length = File.audioProperties()->lengthInMilliseconds();
    int LengthSec = File.audioProperties()->lengthInSeconds();
    int SampleRate = File.audioProperties()->sampleRate();
    
    std::string Path = DirCtrl->GetFilePath().ToStdString();
    
    char c = '/';
    std::string Filename = DirCtrl->GetFilePath().AfterLast(c).ToStdString();

    wxVector<wxVariant> Data;
    Data.clear();
    Data.push_back(false);
    Data.push_back(Filename);
    Data.push_back(TagLibTowx(Artist));
    Data.push_back(wxString::Format("%d",Channels));
    Data.push_back(wxString::Format("%d",LengthSec));
    Data.push_back(wxString::Format("%d",SampleRate));
    Data.push_back(wxString::Format("%d",Bitrate));
    Data.push_back(TagLibTowx(Comment));

    SampleListView->AppendItem(Data);

    // db.InsertSample(0, Filename, Artist.to8Bit(), Channels, Length,
                    // SampleRate, Bitrate, Comment.to8Bit(), Path);

    wxString sample = db.GetSamplePathByFilename(std::string(Filename));
    std::cout << "Sample: " << sample << std::endl;
}

正如你在上面看到的，我已经注释掉了向 Sqlite3 数据库插入数据的行，db.InsertSample()看起来像这样

void Database::InsertSample(int Favorite, std::string Filename,
                            std::string SamplePack, int Channels, int Length,
                            int SampleRate, int Bitrate, std::string Comment,
                            std::string Path)
{
    try
    {
        rc = sqlite3_open("Samples.db", &DB);

        sql = "INSERT INTO SAMPLES (FAVORITE, FILENAME, SAMPLEPACK, CHANNELS, \
                                    LENGTH, SAMPLERATE, BITRATE, BITSPERSAMPLE, PATH) \
            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?);";

        rc = sqlite3_prepare_v2(DB, sql.c_str(), sql.size(), &stmt, NULL);   // create the prepared statement
        rc = sqlite3_bind_int(stmt, 1, Favorite);
        rc = sqlite3_bind_text(stmt, 2, Filename.c_str(), Filename.size(), SQLITE_STATIC);
        rc = sqlite3_bind_text(stmt, 3, SamplePack.c_str(), SamplePack.size(), SQLITE_STATIC);
        rc = sqlite3_bind_int(stmt, 4, Channels);
        rc = sqlite3_bind_int(stmt, 5, Length);
        rc = sqlite3_bind_int(stmt, 6, SampleRate);
        rc = sqlite3_bind_int(stmt, 7, Bitrate);
        rc = sqlite3_bind_text(stmt, 8, Comment.c_str(), Comment.size(), SQLITE_STATIC);
        rc = sqlite3_bind_text(stmt, 9, Path.c_str(), Path.size(), SQLITE_STATIC);

        if (sqlite3_step(stmt) != SQLITE_DONE)
        {
            std::cout << "Not inserted data." << "\n";
        }
        
        rc = sqlite3_finalize(stmt);

        if (rc != SQLITE_OK)
        {
            std::cerr << "Error! Cannot insert data into table." << std::endl;
            sqlite3_free(ErrorMessage);
        }
        else if (rc == SQLITE_BUSY)
        {
            std::cout << "BUSY" << std::endl;
        }
        else if (rc == SQLITE_DONE)
        {
            std::cout << "DONE" << std::endl;
        }
        else if (rc == SQLITE_ERROR)
        {
            std::cout << "ERROR" << std::endl;
        }
        else if (rc == SQLITE_MISUSE)
        {
            std::cout << "MISUSE" << std::endl;
        }
        else
        {
            std::cout << "Data inserted successfully." << ErrorMessage << std::endl;
        }

        sqlite3_close(DB);
    }
    catch (const std::exception &exception)
    {
        std::cerr << exception.what();
    }
}

我不能说数据库是否有问题或目前是什么问题，我仍在寻找，如果您发现任何问题，请告诉我。

链接到Database.cpp文件 - https://gitlab.com/apoorv569/cpp-projects/-/blob/master/wxWidgets/SampleBrowser/src/Database.cpp

标签： c++wxwidgets