GTK:如何在顶部窗口边框上获取按钮释放事件

#include <gtk/gtk.h>

// 按钮释放事件处理函数
void button_release_event(GtkWidget *widget, GdkEventButton *event, gpointer data) {
    g_print("Button released\n");
}

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

    // 创建顶级窗口
    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "GTK Window");
    gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

    // 创建水平布局容器
    GtkWidget *box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);

    // 创建按钮
    GtkWidget *button = gtk_button_new_with_label("Button");
    g_signal_connect(button, "button-release-event", G_CALLBACK(button_release_event), NULL);

    // 将按钮添加到水平布局容器中
    gtk_box_pack_start(GTK_BOX(box), button, TRUE, TRUE, 0);

    // 将水平布局容器添加到顶级窗口中
    gtk_container_add(GTK_CONTAINER(window), box);

    // 获取顶级窗口的边框窗口
    GtkWidget *border_window = gtk_widget_get_toplevel(window);

    // 隐藏边框窗口的装饰样式
    gtk_window_set_decorated(GTK_WINDOW(border_window), FALSE);

    // 为边框窗口添加按钮释放事件
    gtk_widget_add_events(border_window, GDK_BUTTON_RELEASE_MASK);

    // 连接按钮释放事件的处理函数
    g_signal_connect(border_window, "button-release-event", G_CALLBACK(button_release_event), NULL);

    // 显示窗口
    gtk_widget_show_all(window);

    // 运行主循环
    gtk_main();

    return 0;
}