我如何在程序运行时更改标签的GTK;从单独的线程 [英] How do I change a label in GTK while the program is running; from a seperate thread

问题描述

我建立一个多线程的应用程序，它会显示天气数据和C.自动更新我得到的气象数据刷新并加载到变量。我无法在我的计划中端运行的变化值。当我使用

I am building a multi-threaded application which will display weather data and update automatically in C. I got the weather data to refresh and loaded into variables. I am having trouble changing values on my program mid-run. When I use

gtk_label_set_text(GTK_LABEL(wsrc->text2), wsrc->deg);

我得到

(out:7604): Gtk-CRITICAL **: gtk_label_set_text: assertion `GTK_IS_LABEL (label)' failed

我如何做到这一点。该呼叫是从主一个单独的线程循环更新的气象数据。

How do I do this. The call is from a separate thread from main that loops to renew weather data.

难道我用的信号来创建一个触发更新的气象资料。寻找建议：）

Do I use signals to create a trigger to renew weather data. Looking for advice :)

推荐答案

不要从外面的主线程，周期GTK +的方法。我知道有解决方法，但99.99％的时间，你真的不想这样做。

Do not call GTK+ methods from outside it's main thread, period. I know there are workarounds, but 99.99% of the time you really do not want to do it.

你应该做的，而不是是这样的：

What you should do instead is this:

/* in your other thread do this: it will make sure update_text2 will be called in
   GTK+ main thread */
g_main_context_invoke (NULL, update_text2, wsrc);

static gboolean update_text2 (gpointer userdata)
{
    my_obj* wsrc = (my_obj*) userdata;
    gtk_label_set_text(GTK_LABEL(wsrc->text2), wsrc->deg);
    return G_SOURCE_REMOVE;
}

我没有测试code，不知道你的WSRC指针的类型，但我敢肯定，你得到的漂移。

I didn't test that code, and don't know the type of your wsrc pointer but I'm sure you get the drift.

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