学步园

#include <gtk/gtk.h>

typedef struct _Ourarg Ourarg;

struct _Ourarg {

	GtkWidget *fixed;

	GtkWidget *image;

	gint right;

	gint left;

};

void	image_go(Ourarg *arg)

{

	gint x, y, toward;

	x = y = arg->left;

	toward = 1;

	for(;;)

	{

		g_usleep(1500);

		gdk_threads_enter();

		gtk_fixed_move(GTK_FIXED(arg->fixed),arg->image, x, y);

		switch(toward)

		{

		case 1:

			x = x + 10;

			if( x > arg->right ) toward = 2;

			break;

		case 2:

			y = y + 10;

			if( y > arg->right ) toward = 3;

			break;

		case 3:

			x = x - 10;

			if( x < arg->left ) toward = 4;

			break;

		case 4:

			y = y -10;

			if( y < arg->left ) toward = 1;

		}

		gdk_threads_leave();

	}

}

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

{

	GtkWidget *window;

	GtkWidget *vbox, *viewport, *button;

	GtkWidget *image, *fixed;

	Ourarg *arg;

	if(!g_thread_supported()) g_thread_init(NULL);

	gdk_threads_init();

	gtk_init(&argc,&argv);

	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

	gtk_window_set_title(GTK_WINDOW(window),"线程测试");

	g_signal_connect(G_OBJECT(window),"delete_event",

			G_CALLBACK(gtk_main_quit),NULL);

	gtk_container_set_border_width(GTK_CONTAINER(window),2);

	vbox = gtk_vbox_new(FALSE,0);

	gtk_container_add(GTK_CONTAINER(window),vbox);

	fixed = gtk_fixed_new();

	gtk_widget_set_usize(fixed,340,340);

	viewport = gtk_viewport_new(NULL,NULL);

	gtk_box_pack_start(GTK_BOX(vbox),viewport,FALSE,FALSE,5);

	gtk_container_add(GTK_CONTAINER(viewport),fixed);

	image = gtk_image_new_from_file("ss.png");

	gtk_fixed_put(GTK_FIXED(fixed),image,40,40);

	button = gtk_button_new_with_label("退出");

	gtk_box_pack_start(GTK_BOX(vbox),button,FALSE,FALSE,5);

	g_signal_connect(G_OBJECT(button),"clicked",

			G_CALLBACK(gtk_main_quit),NULL);

	gtk_widget_show_all(window);

	arg = g_new(Ourarg,1);

	arg->fixed = fixed;

	arg->image = image;

	arg->left = 40;

	arg->right = 260;

	g_thread_create(image_go, arg, FALSE, NULL);

	gdk_threads_enter();

	gtk_main();

	gdk_threads_leave();

	return FALSE;

}