克隆Gtk中的小部件及其所有子部件

#include <gtk/gtk.h>

// 定义一个自定义的按钮类
typedef struct {
    GtkButton parent;
    GtkWidget *label;
} MyButton;

// 定义按钮类的模板
static const gchar *button_template =
    "<template class=\"MyButton\" parent=\"GtkButton\">"
    "  <property name=\"label\">My Button</property>"
    "  <child>"
    "    <label name=\"label\"/>"
    "  </child>"
    "</template>";

G_DEFINE_TYPE(MyButton, my_button, GTK_TYPE_BUTTON)

// 初始化按钮类
static void my_button_class_init(MyButtonClass *klass) {
    gtk_widget_class_set_template_from_string(GTK_WIDGET_CLASS(klass), button_template);
    gtk_widget_class_bind_template_child(GTK_WIDGET_CLASS(klass), MyButton, label);
}

// 初始化按钮实例
static void my_button_init(MyButton *button) {
    gtk_widget_init_template(GTK_WIDGET(button));
}

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

    // 创建一个按钮实例
    MyButton *button = g_object_new(MY_TYPE_BUTTON, NULL);

    // 显示按钮
    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(button));
    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}