fitren

在g_sigal_connect系列函数中,我们往往需要给CALLBACK函数传入参数,但很多时候一个参数是不够的,往往需要许多参数,这时,我们就用结构吧.

typedef struct _tran_data{

         int i;

         float f;

         char c;

         char *str;

}tran_data;

下面是简单的例子:

tran_data *td;

td->i=1;

td->f=1.1;

td->c='c';

td->str="Just for testing!";

g_signal_connect_swapped(G_OBJECT(button),"clicked",G_CALLBACK(callback_fun),td);

callback 函数(callback_fun)

void callback_fun(gpointer user_data)

{

    tran_data *td=(tran_data *)user_data;

    printf("int i=%d,float f=%.1f,char c=%c,string str=%s\n",td->i,td->f,td->c,td->str);

}

结果: