GTK+信号和事件实例

 

#include <gtk/gtk.h>
//按钮的回调函数
void callback(GtkWidget *widget, gpointer  data)
{
    g_print("hello again-%s was presswd\n",(gchar *)data);
    //使用glib库的g_print在终端打印相应的字符
}
//关闭事件的回调函数
gint delete_event(GtkWidget *widget,GdkEvent *event,gpointer data)
{
    gtk_main_quit();
    return FALSE;
}
int main(int argc , char *argv[])
{
    GtkWidget *window;
    GtkWidget *button;
    GtkWidget *box1;

    gtk_init(&argc,&argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

    gtk_window_set_title(GTK_WINDOW(window),"pstary");

    g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(delete_event),NULL);

    //设置窗口边框高度
    gtk_container_set_border_width(GTK_CONTAINER(window),30);

    //创建一个组合框，看不见，只是作为排列构件的工具
    box1 = gtk_hbox_new(FALSE,0);

    //将组合框加入到主窗口中
    gtk_container_add(GTK_CONTAINER(window),box1);

    button = gtk_button_new_with_label("button 1");

    g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(callback),"button 1");

    //将按钮加入到组合框中
    gtk_box_pack_start(GTK_BOX(box1),button,TRUE,TRUE,0);

    //显示按钮
    gtk_widget_show(button);

    button = gtk_button_new_with_label("button 2");

    g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(callback),"button 2");

    gtk_box_pack_start(GTK_BOX(box1),button,TRUE,TRUE,0);

    gtk_widget_show(button);

    gtk_widget_show(box1);

    gtk_widget_show(window);

    gtk_main();

    return 0;

}

注意事件和信号回调函数的不同，运行结果如下:

root@ubuntu:~/document/gtk# ./helloworld 

hello again-button 1 was presswd

hello again-button 1 was presswd

hello again-button 2 was presswd

hello again-button 2 was presswd

hello again-button 2 was presswd