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gtk_widget_show_all（窗口）;在等待函数返回值时不工作

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我正在做一个飞镖游戏，我已经创建了游戏页面的整个布局 . 我想等待飞镖击中棋盘，这需要花费不同的时间，然后更新该飞镖的分数，更新玩家剩下的剩余分数，并更新轮次分数 .

我进行布局，调用gtk_widget_show_all（window）;,然后调用await_dart_hit（）;

直到飞镖击中时才会显示窗口 . 好像窗口在整个函数结束之前都无法显示，但我尝试在单独的函数中创建窗口，然后返回，然后调用await_dart_hit（）;这也不起作用 .

#include <gtk/gtk.h>

void problem_causing_wait(){
    while(1);
}

void start(){
    GtkWidget *window;

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"Start");
    gtk_container_set_border_width(GTK_CONTAINER(window),10);
    gtk_window_set_default_size(GTK_WINDOW(window),1000,400);

    gtk_widget_show_all(window);

    problem_causing_wait();
}

int main(int argc, char *argv[]) {
    GtkWidget *window, *button, *button_box;

    gtk_init(&argc,&argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"Welcome!");
    gtk_window_set_default_size(GTK_WINDOW(window),1000,400);

    button_box = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
    gtk_container_add(GTK_CONTAINER(window),button_box);

    button = gtk_button_new_with_label("Get Started");
    g_signal_connect (button, "clicked", G_CALLBACK (start), NULL);
    g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
    gtk_container_add(GTK_CONTAINER(button_box),button);

    gtk_widget_show_all(window);

    gtk_main();

    return(0);
}

如果您运行此代码，您会看到一旦单击“开始”按钮，它就会冻结 . 尽管在调用problem_causing_wait（）函数之前显示全部，但它不会显示“开始”窗口 .

请帮忙！

编译：gcc main.c -o main pkg-config --cflags --libs gtk+-3.0

c gtk gtk3

1 回答

  • 1

    当您的应用程序在单个线程中运行时，此函数“problem_causing_wait”充当阻塞函数并停止主循环 .

    我认为使用“g_idle_add”和“g_thread_new”可能会解决您的问题 .

    #include <gtk/gtk.h>

void *problem_causing_wait(){
    while(1);
    //update the Ui using g_idle_add
    return NULL;
}

void start(){
    GtkWidget *window;

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"Start");
    gtk_container_set_border_width(GTK_CONTAINER(window),10);
    gtk_window_set_default_size(GTK_WINDOW(window),1000,400);

    g_thread_new("dart-game",problem_causing_wait,NULL);

    gtk_widget_show_all(window);
}

int main(int argc, char *argv[]) {
    GtkWidget *window, *button, *button_box;

        //Initilizes Support for Concurrent Threads
    XInitThreads();

    gtk_init(&argc,&argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"Welcome!");
    gtk_window_set_default_size(GTK_WINDOW(window),1000,400);

    button_box = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
    gtk_container_add(GTK_CONTAINER(window),button_box);

    button = gtk_button_new_with_label("Get Started");
    g_signal_connect (button, "clicked", G_CALLBACK (start), NULL);
    //g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
    gtk_container_add(GTK_CONTAINER(button_box),button);

    gtk_widget_show_all(window);

    gtk_main();

    return(0);
}
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