如何制作带有SPLASH界面的程序

#include <gtk/gtk.h>

typedef struct _ProgressData {   
    GtkWidget *window;  
    GtkWidget *pbar;  
    GtkWidget *vbox;
    GtkWidget *image;
    GtkWidget *align;
    int timer;  
}ProgressData;

typedef struct _MainData {
    GtkWidget *MainWin;
}MainData;
MainData *pmdata;

static void destroy_progress( GtkWidget *widget, ProgressData *pdata);

/* 更新进度条，这样就能够看到进度条的移动 */
static gint progress_timeout( gpointer data )
{
        ProgressData *pdata = (ProgressData *)data;
        gdouble new_val;
        /* 使用在调整对象中设置的取值范围计算进度条的值 */
        new_val = gtk_progress_bar_get_fraction (GTK_PROGRESS_BAR(pdata->pbar)) + 0.05;
        if (new_val > 1.0) {
                //new_val = 0.0; /* 当进度条100%之后执行其他的操作 */
                gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (pdata->pbar),1.0);
                g_usleep(500);
                destroy_progress(pdata->pbar,pdata);
                return FALSE;
        }
        /* 设置进度条的新值 */
        gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (pdata->pbar),new_val);
        /* 这是一个timeout函数，返回 TRUE，这样它就能够继续被调用 */
int main( int argc, char *argv[])
{
        ProgressData *pdata     = NULL;

        gtk_init (&argc, &argv);
        /* 为传递到回调函数中的数据分配内存 */
        pdata = g_malloc (sizeof (ProgressData));
        pmdata = g_malloc (sizeof (MainData));

        pdata->window = gtk_window_new (GTK_WINDOW_POPUP);
        gtk_window_set_resizable (GTK_WINDOW (pdata->window), FALSE);
        /* 不连接gtk_main_quit回调，这样就可以安全的destroy掉splash窗口了 */
        //g_signal_connect (G_OBJECT (pdata->window), "destroy",G_CALLBACK (gtk_main_quit),NULL);
        gtk_window_set_position(GTK_WINDOW(pdata->window), GTK_WIN_POS_CENTER_ALWAYS);
        gtk_widget_set_size_request(pdata->window, 500, 350);
        /* main window will display after splash window */
        pmdata->MainWin = gtk_window_new (GTK_WINDOW_TOPLEVEL);
        gtk_window_set_resizable (GTK_WINDOW(pmdata->MainWin), FALSE);
        g_signal_connect (G_OBJECT (pmdata->MainWin), "destroy",G_CALLBACK (gtk_main_quit),NULL);
        gtk_window_set_position(GTK_WINDOW(pmdata->MainWin), GTK_WIN_POS_CENTER_ALWAYS);
        gtk_widget_set_size_request(pmdata->MainWin, 500, 500);
        /* vbox for layout splash window */
        pdata->vbox = gtk_vbox_new (FALSE, 5);
        gtk_container_set_border_width (GTK_CONTAINER (pdata->vbox), 0);
        gtk_container_add (GTK_CONTAINER (pdata->window), pdata->vbox);
        gtk_widget_show (pdata->vbox);
        /* image */
        pdata->image = gtk_image_new_from_file("image/splash.png");
        gtk_box_pack_start (GTK_BOX (pdata->vbox), pdata->image, TRUE, TRUE, 0);
        gtk_widget_show(pdata->image);
        /* 创建一个居中对齐的对象 */
        pdata->align = gtk_alignment_new (0.5, 1, 1, 1);
        gtk_box_pack_start (GTK_BOX (pdata->vbox), pdata->align, FALSE, FALSE, 0);
        gtk_widget_show (pdata->align);
        /* 创建进度条 */
        pdata->pbar = gtk_progress_bar_new ();
        gtk_container_add (GTK_CONTAINER (pdata->align), pdata->pbar);
        gtk_widget_show (pdata->pbar);
        /* 加一个定时器(timer)，以更新进度条的值 */
        pdata->timer = gtk_timeout_add (100, progress_timeout, pdata);

        gtk_widget_show (pdata->window);
        //gtk_widget_show(pdata->MainWin);

        gtk_main ();
        return 0;
}


return TRUE;}/* 清除分配的内存，删除定时器(timer), 进度条走满后调用的函数，可以用来做很多事情 */static void destroy_progress( GtkWidget *widget, ProgressData *pdata){ gtk_timeout_remove (pdata->timer); pdata->timer = 0; gtk_widget_destroy(pdata->pbar); gtk_widget_destroy(pdata->image); //gtk_widget_hide(pdata->window);
 gtk_widget_destroy(pdata->window); g_free(pdata); gtk_widget_show(pmdata->MainWin);}