GTK程序--GTKENTRY模拟登录框

转载：http://hi.baidu.com/vivo01/blog/item/1af48ed4b253c5c951da4b2f.html

//这个程序包括两个GtkEntry,一个用于获得用户名，一个用于获得密码，密码框设置不可见，不可见时显示字符为“#”，登录成功或失败会给出相应提示

#include

#define NAME    "root"
#define PWD     "123456"

//将登陆窗体独立成一个结构体

struct login_widget{
        GtkWidget *window; //主窗体
        GtkWidget *label_tips; //用于信息提示的标签
        GtkWidget *button_login; //两个按钮，一个点击后登录，一个点击后退出
        GtkWidget *button_exit;
        GtkWidget *entry_username; //两个文本框，用于输入用户名和密码
        GtkWidget *entry_pwd;
        GtkWidget *label_username; //两个标签用于显示username文本框和password文本框提示
        GtkWidget *label_pwd;
        GtkWidget *vbox; //垂直布局盒子，包含以下三个水平布局盒子
        GtkWidget *hbox_username; //包含用户名提示标签和用户名文本框，下面的HBOX作用类似
        GtkWidget *hbox_pwd;
        GtkWidget *hbox_button;
}wgt;

void gtk_win_destroy(GtkWidget *widget,gpointer data)
{
        gtk_main_quit();
}

//登录验证函数，点击login按钮时调用

void login(GtkWidget *widget,gpointer data)
{
        gchar *name;
        gchar *pwd;
        struct login_widget *wgt;

        wgt = (struct loging_widget *)data;

        //获取输入的信息

        name = gtk_entry_get_text(GTK_ENTRY(wgt->entry_username));
        pwd = gtk_entry_get_text(GTK_ENTRY(wgt->entry_pwd));

        if((strcmp(name,NAME) == 0) && (strcmp(pwd,PWD) == 0))
        {
                gtk_label_set_text(GTK_LABEL(wgt->label_tips),"Welcome to GTK+-2.0");
        }
        else
        {
                gtk_label_set_text(GTK_LABEL(wgt->label_tips),"Invalid user name or password.");
        }
}

void init_login_widget()
{
        wgt.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
        wgt.label_tips = gtk_label_new("Welcome,please login first");
        wgt.button_login = gtk_button_new_with_label("login");
        wgt.button_exit = gtk_button_new_with_label("exit");
        wgt.entry_username = gtk_entry_new_with_max_length(10);
        wgt.entry_pwd = gtk_entry_new_with_max_length(10);
        wgt.label_username = gtk_label_new("User name :");
        wgt.label_pwd = gtk_label_new("Password :");
        wgt.vbox = gtk_vbox_new(FALSE,20);
        wgt.hbox_username = gtk_hbox_new(FALSE,20);
        wgt.hbox_pwd = gtk_hbox_new(FALSE,20);
        wgt.hbox_button = gtk_hbox_new(FALSE,20);

        //设置窗体

        gtk_window_set_title(GTK_WINDOW(wgt.window),"System login");
        gtk_window_set_resizable(GTK_WINDOW(wgt.window),FALSE);

        //设置布局盒子

        gtk_box_pack_start(GTK_BOX(wgt.hbox_username),wgt.label_username,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.hbox_username),wgt.entry_username,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.hbox_pwd),wgt.label_pwd,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.hbox_pwd),wgt.entry_pwd,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.hbox_button),wgt.button_login,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.hbox_button),wgt.button_exit,TRUE,FALSE,10);

        gtk_box_pack_start(GTK_BOX(wgt.vbox),wgt.label_tips,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.vbox),wgt.hbox_username,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.vbox),wgt.hbox_pwd,TRUE,FALSE,10);
        gtk_box_pack_start(GTK_BOX(wgt.vbox),wgt.hbox_button,TRUE,FALSE,10);

        //设置密码框不可见，用户输入时显示“#”

        gtk_entry_set_visibility(GTK_ENTRY(wgt.entry_pwd),FALSE);
        gtk_entry_set_invisible_char(GTK_ENTRY(wgt.entry_pwd),'#');

        g_signal_connect(GTK_OBJECT(wgt.button_login),"clicked",GTK_SIGNAL_FUNC(login),&wgt);
        g_signal_connect(GTK_OBJECT(wgt.window),"destroy",GTK_SIGNAL_FUNC(gtk_win_destroy),NULL);
        g_signal_connect(GTK_OBJECT(wgt.button_exit),"clicked",GTK_SIGNAL_FUNC(gtk_win_destroy),NULL);

        gtk_container_add(GTK_CONTAINER(wgt.window),wgt.vbox);

        gtk_widget_show_all(wgt.window);
}

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

        init_login_widget();

        gtk_main();

        return 0;
}

运行截图