1.1 --- a/examples/imgthumbs/src/main.c	Fri Jan 31 03:17:24 2014 +0200
     1.2 +++ b/examples/imgthumbs/src/main.c	Fri Jan 31 03:40:00 2014 +0200
     1.3 @@ -13,6 +13,7 @@
     1.4  static void keyb(unsigned char key, int x, int y);
     1.5  static void mouse(int bn, int st, int x, int y);
     1.6  static void motion(int x, int y);
     1.7 +static void sball_motion(int x, int y, int z);
     1.8  static struct thumbnail *find_thumb(int x, int y);
     1.9  
    1.10  const char *path = ".";
    1.11 @@ -43,6 +44,7 @@
    1.12  	glutKeyboardFunc(keyb);
    1.13  	glutMouseFunc(mouse);
    1.14  	glutMotionFunc(motion);
    1.15 +	glutSpaceballMotionFunc(sball_motion);
    1.16  
    1.17  	if(init() == -1) {
    1.18  		return 1;
    1.19 @@ -55,6 +57,8 @@
    1.20  
    1.21  static int init(void)
    1.22  {
    1.23 +	glewInit();
    1.24 +
    1.25  	thumbs = create_thumbs(path);
    1.26  	return 0;
    1.27  }
    1.28 @@ -211,6 +215,26 @@
    1.29  	}
    1.30  }
    1.31  
    1.32 +static void sball_motion(int x, int y, int z)
    1.33 +{
    1.34 +	float fx = -x * 0.0004;
    1.35 +	float fy = z * 0.0004;
    1.36 +	float fz = -y * 0.0005;
    1.37 +
    1.38 +	if(show_thumb) {
    1.39 +		show_pan_x += fx / show_zoom;
    1.40 +		show_pan_y += fy / show_zoom;
    1.41 +		show_zoom += fz;
    1.42 +		if(show_zoom <= 0) show_zoom = 0;
    1.43 +	} else {
    1.44 +		pan_x += fx;
    1.45 +		pan_y += fy;
    1.46 +		thumbs_size += fz;
    1.47 +		if(thumbs_size <= 0.01) thumbs_size = 0.01;
    1.48 +	}
    1.49 +	glutPostRedisplay();
    1.50 +}
    1.51 +
    1.52  static struct thumbnail *find_thumb(int x, int y)
    1.53  {
    1.54  	float fx = (float)x / (float)win_width;