gtk编程遇到的的一个小问题

Question

代码

#include <gtk/gtk.h>
gint count=1;
void on_button_clicked(GtkWidget *button,GdkEvent* event,gpointer userdata)
{     g_print("Hello,  this is a Hello function test.\n");
g_print("%d\n",(gint)userdata);
count = count + 1 ;
}
int main ( int argc , char* argv[])
{ 
GtkWidget *window;
GtkWidget *button;
gtk_init(&argc,&argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(gtk_main_quit),NULL);
gtk_window_set_title(GTK_WINDOW(window),"Hello  Function");
gtk_window_set_default_size(GTK_WINDOW(window),500,100);
gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);
gtk_container_set_border_width(GTK_CONTAINER(window),40);
button = gtk_button_new_with_label("Press this Button will show a message in terminal");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(on_button_clicked),(gpointer)count);
gtk_container_add(GTK_CONTAINER(window),button);
}
编译通过，运行无窗口
编译命令 gcc c.c    `pkg-config  --cflags  --libs  gtk+-2.0`或 gcc c.c    `pkg-config  --cflags  --libs  gtk+-3.0`
刚开始编译失败fail to load moudle 
于是sudo apt-get install libcanberra-gtk-module
我的系统ubuntu22.04

Answer 1

该回答通过自己思路及引用到GPTᴼᴾᴱᴺᴬᴵ搜索,得到内容具体如下：
根据您提供的代码和信息，问题可能是您在程序的main函数中没有调用gtk_main()函数来启动GTK主循环。gtk_main()函数负责处理GTK事件和绘制窗口，如果没有调用它，窗口将无法显示。

您可以在main函数的最后添加以下代码来调用gtk_main()函数：

gtk_widget_show_all(window);
gtk_main();

这将显示窗口并启动GTK主循环，使窗口能够响应事件和显示内容。

此外，如果您使用的是GTK 3版本，您需要相应地将编译命令中的gtk+-2.0更改为gtk+-3.0。

修复后的代码如下：

#include <gtk/gtk.h>

gint count = 1;

void on_button_clicked(GtkWidget *button, gpointer userdata)
{
    g_print("Hello, this is a Hello function test.\n");
    g_print("%d\n", (gint)userdata);
    count = count + 1;
}

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

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(G_OBJECT(window), "delete_event", G_CALLBACK(gtk_main_quit), NULL);
    gtk_window_set_title(GTK_WINDOW(window), "Hello Function");
    gtk_window_set_default_size(GTK_WINDOW(window), 500, 100);
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_container_set_border_width(GTK_CONTAINER(window), 40);

    button = gtk_button_new_with_label("Press this Button will show a message in terminal");
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(on_button_clicked), (gpointer)count);

    gtk_container_add(GTK_CONTAINER(window), button);

    gtk_widget_show_all(window);
    gtk_main();

    return 0;
}

请尝试使用修复后的代码并重新编译运行，看看是否能够正确显示窗口并响应按钮点击事件。

---

如果以上回答对您有所帮助，点击一下采纳该答案～谢谢