void carmen_map_graphics_adjust_scrollbars(GtkMapViewer *map_view,
carmen_world_point_p new_centre)
{
double x_value, y_value;
carmen_point_t screen;
GtkAdjustment *x_scroll_adj, *y_scroll_adj;
world_to_screen(new_centre, &screen, map_view);
x_scroll_adj = map_view->x_scroll_adj;
y_scroll_adj = map_view->y_scroll_adj;
screen.x += map_view->x_scroll_adj->value;
screen.y += map_view->y_scroll_adj->value;
x_value = screen.x - (x_scroll_adj->page_size/2);
y_value = screen.y - (y_scroll_adj->page_size/2);
if (x_value + x_scroll_adj->page_size > x_scroll_adj->upper)
x_value = x_scroll_adj->upper - x_scroll_adj->page_size;
if (x_value < 0)
x_value = 0;
if (y_value + y_scroll_adj->page_size > y_scroll_adj->upper)
y_value = y_scroll_adj->upper - y_scroll_adj->page_size;
if (y_value < 0)
y_value = 0;
if (fabs(x_scroll_adj->value - x_value) < 10.0 &&
fabs(y_scroll_adj->value - y_value) < 10.0)
return;
gtk_adjustment_set_value(x_scroll_adj, x_value);
gtk_adjustment_set_value(y_scroll_adj, y_value);
map_view->centre = *new_centre;
}
Imath::Box2i viewport_t::world_to_screen( const Imath::Box2f& b) const
{
return Imath::Box2i( world_to_screen( Imath::V2f( b.min.x, b.min.y)),
world_to_screen( Imath::V2f( b.max.x, b.max.y)));
}
