如何初始化GActionMap变量?

问题描述

我想知道如何初始化GActionMap变量.

I want to know how to initialize a GActionMap variable.

我在这里搜索 https://developer.gnome.org/gio/stable/GActionMap.html 来找到一个实例化GActionMap的函数，但是我没有在任何地方找到它.

I search here https://developer.gnome.org/gio/stable/GActionMap.html to find a function that instances a GActionMap, but I didn't find it there and anywhere.

我试图在我的应用程序中插入一些动作，以使用该功能 item = g_menu_item_new(labelItem，"sair"); 其中 item 是菜单项，labelItem是菜单项标签，而 sair 是单击该项目时要触发的函数名.

I was trying to insert some actions in my application, to use the functionitem = g_menu_item_new(labelItem, "sair");where item is a menu item, labelItem is a menu item label and sair is the function name that I want to trigger when the item is clicked.

但是，当我运行代码时，出现分段错误"，这专门在 g_action_map_add_action(grupo，G_ACTION(acao)); :

But when I run the code, I get "segmentation fault", that stop the execution specifically in g_action_map_add_action(grupo, G_ACTION(acao));:

    GSimpleAction *acao;
    GActionMap *grupo;

    acao = g_simple_action_new("sair", NULL);
    g_signal_connect(
        G_OBJECT(acao), "activate", G_CALLBACK(sair), window);

    g_action_map_add_action(grupo, G_ACTION(acao));
    gtk_widget_insert_action_group(
        window, "grupo", G_ACTION_GROUP(grupo));

窗口是应用程序窗口.

消息错误如下:

GLib-GObject-CRITICAL **: 17:01:01.711: g_type_interface_peek: assertion 'instance_class != NULL' failed
[1]    11396 segmentation fault (core dumped)

我正在使用gtk4.

推荐答案

根据文档， GActionMap 是一个接口( https://developer.gnome.org/gio/stable/GActionMap.html )，例如，它是由 GApplication ( https://developer.gnome.org/gio/stable/GApplication.html).

According to the documentation, GActionMap is an interface (https://developer.gnome.org/gio/stable/GActionMap.html) which is implemented, for example, by GApplication (https://developer.gnome.org/gio/stable/GApplication.html).

因此，您应该将 GApplication 实例(或另一种实现接口 GActionMap 的类型)传递给本教程中完成的功能: https://developer.gnome.org/GAction/用于类似的用例(不同的功能，相同的输入).

Therefore you should pass a GApplication instance (or another type that implements the interface GActionMap) to the function like it is done in this tutorial: https://developer.gnome.org/GAction/ for a similar usecase (different functions, same inputs).

如果链接断开，我在这里复制您应该编写的代码，假设您可以访问 GApplication 的正确初始化的实例:

Should the link broke I replicate here the code that you should write, assuming that you have access to a correctly initialized instance of a GApplication:

GApplication * app = ...
...some other code ...
g_action_map_add_action(G_ACTION_MAP(app), G_ACTION(acao));

这篇关于如何初始化GActionMap变量?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！