带有 gtkmm 派生小部件的空白窗口

Blank window with gtkmm derived widget

本文关键字：空白 窗口 小部 gtkmm 派生 带有      更新时间：2023-10-16

我目前正在用 c++ 编写一个小桌面应用程序，这是我第一次使用 gtkmm。

我从这里学习了教程，但我得到的只是一个空白窗口。它在将 MainWindow 重新制造为自己的类之前就已经工作了......

请注意：我省略了包含、使用和信号处理程序实现。

这是我的主要功能：

int main(int argc, char **argv)
{
    RefPtr<Application> app = Application::create(argc, argv, "org.mw88.adbtool");
    //Main kit(argc, argv);
    RefPtr<Builder> builder = Builder::create();
    try
    {
        builder->add_from_file("Gui.glade");
        MainWindow *window = NULL;
        builder->get_widget_derived("MainWindow", window);
        app->run(*window);
        //kit.run(*window);
    }
    catch (const FileError& ex)
    {
        cerr << "FileError: " << ex.what() << endl;        
        return EXIT_FAILURE;
    }
    catch (const MarkupError& ex)
    {
        cerr << "MarkupError: " << ex.what() << endl;        
        return EXIT_FAILURE;
    }
    catch (const BuilderError& ex)
    {
        cerr << "BuilderError: " << ex.what() << endl;
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
}

My MainWindow-header：

class MainWindow : public Window
{
public:
    MainWindow(BaseObjectType* cobject, const RefPtr<Builder>& refBuilder);
    virtual ~MainWindow();
    void show(RefPtr<Application> &app);
private:
    RefPtr<Builder>     builder;
    ToolButton          *addButton;
    ToolButton          *editButton;
    ToolButton          *deleteButton;
    ToolButton          *connectButton;
    TreeView            *hostList;
    RefPtr<ListStore>   listStore; 
    Columns             cols;
    //Signal handlers:
    virtual void onAddClicked();
    virtual void onEditClicked();
    virtual void onDeleteClicked();
    virtual void onConnectClicked();  
};

这是 MainWindow 类的构造函数：

MainWindow::MainWindow(BaseObjectType* cobject, const RefPtr<Builder>& refBuilder)
{
    this->builder = refBuilder;
    addButton = NULL;
    editButton = NULL;
    deleteButton = NULL;
    connectButton = NULL;
    hostList = NULL;
    builder->get_widget("hostList", hostList);
    builder->get_widget("addButton", addButton);
    addButton->signal_clicked().connect(sigc::mem_fun(*this, &MainWindow::onAddClicked));
    builder->get_widget("editButton", editButton);
    editButton->signal_clicked().connect(sigc::mem_fun(*this, &MainWindow::onEditClicked));
    builder->get_widget("deleteButton", deleteButton);
    deleteButton->signal_clicked().connect(sigc::mem_fun(*this, &MainWindow::onDeleteClicked));
    builder->get_widget("connectButton", connectButton);
    connectButton->signal_clicked().connect(sigc::mem_fun(*this, &MainWindow::onConnectClicked));
    hostList->set_model(listStore = ListStore::create(cols));
    hostList->append_column("Host", cols.host);
    hostList->append_column("Port", cols.port);
    for (int i = 0; i < 20; i++)
    {
        TreeModel::Row row = *(listStore->append());
        row[cols.host] = "Testhost";
        row[cols.port] = i;
    }
    show_all_children();
}

似乎所有小部件都从构建器正确返回，但应用程序>运行仅显示一个空窗口。可能是什么原因呢？

你的构造函数不完整，你需要用cObject初始化基类：

MainWindow::MainWindow(BaseObjectType* cobject, const RefPtr<Builder>& refBuilder)
  : Gtk::Window(cObject)  // add this
{
    this->builder = refBuilder;
    ...
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