Glade Interface Designer：找不到信号处理程序

Question

我是 GTK 的新手。我在使用 Glade Interface Designer 设计 UI 时遇到了这样的问题。 我的目的是设计两个窗口。main_window 中的一个按钮控制 create_log_in_window 的外观。 我在 Glade 中添加了函数“create_log_in_window”和对象“main_window”。 但是，当我运行程序时，该按钮无效。而这样的警告正在出现。 以下是代码和警告：

Gtk-WARNING：在“create_log_in_window”中找不到信号处理程序

#include <gtk/gtk.h>
int main (int argc, char *argv[]){

    GtkBuilder      *builder;
    GtkWidget       *main_window;

    gtk_init (&argc, &argv);

    builder = gtk_builder_new();
    gtk_builder_add_from_file(builder,"main_window.glade", NULL);
    main_window = GTK_WIDGET(gtk_builder_get_object(builder, "main_window"));
    gtk_builder_connect_signals(builder, NULL);
    g_object_unref(G_OBJECT(builder));

    gtk_widget_show_all(main_window);
    gtk_main();

    return 0;
}

---

gboolean create_log_in_window(GtkWidget *main_window){

    GtkBuilder *builder;
    GtkWidget  *window;

    gtk_widget_hide_all(main_window);

    builder = gtk_builder_new();
    gtk_builder_add_from_file(builder,"log_in_window.glade",NULL);
    window = GTK_WIDGET(gtk_builder_get_object(builder,"log_in_window"));
    gtk_builder_connect_signals(builder,NULL);
    g_object_unref(G_OBJECT(builder));

    gtk_widget_show_all(window);
    return true;
}

Answer 1

参考了很多资料，终于在这个网站找到了一些有用的东西：http://blog.csdn.net/xuesen_lin/article/details/6001114 关键是我们应该以特殊的方式定义我们的函数，以便让盘子找到函数地址。 也许我的描述不清楚。所以我会展示我的代码。

#include <gtk/gtk.h>

typedef struct _MainDate{

    GtkWidget *main_window;
    GtkWidget *delete_button;

}MainDate;


G_MODULE_EXPORT void delete_confirm_window( GtkButton *button, GtkWidget *popup ){

    GtkBuilder *builder;
    GtkWidget  *delete_window;
    GError *error = NULL;

    builder = gtk_builder_new();
    if(!(gtk_builder_add_from_file(builder,"delete_window.glade",&error))){
        g_warning("%s",error->message);
        g_free(error);
        return ;
    }

    delete_window = GTK_WIDGET(gtk_builder_get_object(builder,"delete_confirm_window"));
    gtk_builder_connect_signals(builder,NULL);

    g_object_unref(builder);

    gtk_widget_show(delete_window);

}

int main(int argc,char *argv[]){

    GtkBuilder *builder;
    MainDate *date;
    GError  *error = NULL;

    gtk_init(&argc,&argv);

    builder = gtk_builder_new();
    if(!(gtk_builder_add_from_file(builder,"main_window.glade",&error))){
        g_warning("%s",error->message);
        g_free(error);
        return 1;
    }

    date = g_slice_new(MainDate);

    date->main_window =      GTK_WIDGET(gtk_builder_get_object(builder,"main_window"));
    date->delete_button = GTK_WIDGET(gtk_builder_get_object(builder,"delete_popmenu"));

    gtk_builder_connect_signals(builder,date);

    g_object_unref(builder);

    gtk_widget_show_all(date->main_window);

    gtk_main();

    g_slice_free(MainDate,date);

    return 0;

}