GTK＋响应下拉列表框的changed信号

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我是靠谱客的博主虚拟牛排，最近开发中收集的这篇文章主要介绍GTK＋响应下拉列表框的changed信号，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

自学真是太痛苦了
Linux编程技术详解是个半吊子
关键的地方就没了
害我自己找半天没有网络真不行阿
g_signal_connect(GTK_COMBO(combol)->entry,
"changed",GTK_SIGNAL_FUNC(combo_changed),
(gpointer)combol);

还有我想解决回调函数只能传一个参数的问题
我用了结构体来装多个参数总是出错打击
只好使用全局变量解决了

以下是我的例子

/***************************************************************************
*   Copyright (C) 2008 by zuopai
cand300k@163.com
组合框构件

***************************************************************************/
#include <gtk-2.0/gtk/gtk.h>
GtkWidget *wnd;
    GtkWidget *fixed;
    GtkWidget *btn;
    GtkWidget *label;

    GtkWidget *combol;
    GList *list=NULL;

void combo_changed(GtkCombo *combl,gpointer data)
{
    //char *var;
    //GtkWidget *label1;

    gtk_label_set_text(GTK_LABEL(label),gtk_entry_get_text(GTK_ENTRY(((GtkCombo*)combol)->entry)));
    //(GtkWidget *)data.label;

    //label1=(combo_label*)data;
}

gint release_resource(GtkWidget *widget,GdkEvent *event ,gpointer data)
{

    gtk_main_quit();
    return FALSE;
}

int main(int argc, char *argv[])
{




    gtk_init(&argc,&argv);

    wnd=gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(wnd),"固定容器构件");

    gtk_window_set_policy(GTK_WINDOW(wnd), FALSE, FALSE, TRUE);

    gtk_container_set_border_width(GTK_CONTAINER(wnd),10);

    fixed=gtk_fixed_new();
    gtk_container_add(GTK_CONTAINER(wnd),fixed);

    combol=gtk_combo_new();
    gtk_fixed_put(GTK_FIXED(fixed),combol,5,20);

    list=g_list_append(list,"first item");
    list=g_list_append(list,"2 item");
    list=g_list_append(list,"3 item");
    list=g_list_append(list,"3 item");
    gtk_combo_set_popdown_strings(GTK_COMBO(combol),list);

    label=gtk_label_new("");
    gtk_label_set_text(GTK_LABEL(label),gtk_entry_get_text(GTK_ENTRY(((GtkCombo*)combol)->entry)));
    gtk_fixed_put(GTK_FIXED(fixed),label,400,30);


    btn=gtk_button_new_with_label("Quit");
    gtk_fixed_put(GTK_FIXED(fixed),btn,550,200);
    gtk_widget_set_size_request(GTK_WIDGET(btn),100,40);

    g_signal_connect(G_OBJECT(btn),"clicked",G_CALLBACK(release_resource),NULL);



g_signal_connect(GTK_COMBO(combol)->entry,"changed",GTK_SIGNAL_FUNC(combo_changed),(gpointer)combol);




    gtk_widget_show_all(wnd);
    gtk_main();



return 0;
}