static int8_t motor_update() {
uint8_t steps = 0;
/* Motion along axes X and Y takes precedence over motion along axis Z, when
* no submersion is requested on the latter. Also, only motion along axes X
* and Y may be combined with one another. */
if((new_pos.x != cur_pos.x || new_pos.y != cur_pos.y)
&& new_pos.z <= cur_pos.z) {
/* Relative offset from #cur_pos on axes X and Y. */
int16_t rel_x = (int16_t)new_pos.x - (int16_t)cur_pos.x;
int16_t rel_y = (int16_t)new_pos.y - (int16_t)cur_pos.y;
/* Enable lines for PWM propagation to motor Y and set its speed. */
if(rel_y) {
setup_axis(AXIS_Y, rel_y); /* @c rel_y is used only for its sign. */
}
/* Enable lines for PWM propagation to motor X and set its speed. Motor
* X may only be set-up after motor Y, as noted in #setup_axis(). */
if(rel_x) {
setup_axis(AXIS_X, rel_x); /* @c rel_x is used only for its sign. */
}
rel_x = abs(rel_x);
rel_y = abs(rel_y);
if(rel_x > 0 && rel_y > 0) {
/* Request the common amount of steps between @c rel_x and
* @c rel_y. */
steps = rel_x >= rel_y ? GRID_TO_STEP(rel_y)
: GRID_TO_STEP(rel_x);
} else {
/* If one of @c rel_x and @c rel_y is @c 0, then calculate the
* amount of steps solely based on the other (non-zero) value. */
steps = rel_x > 0 ? GRID_TO_STEP(rel_x)
: GRID_TO_STEP(rel_y);
}
/* Configure motion along axis Z. */
} else if(new_pos.z != cur_pos.z) {
int16_t rel_z = (int16_t)new_pos.z - cur_pos.z;
setup_axis(AXIS_Z, rel_z); /* @c rel_z is used only for its sign. */
steps = GRID_TO_STEP(abs(rel_z));
motor_status |= _BV(MTR_IS_Z);
} else {
/* Already at #new_pos. */
motor_status &= ~_BV(MTR_IS_Z);
return -1;
}
setup_lock(steps);
motor_start();
return 0;
}
static void
gnome_control_center_init (GnomeControlCenter *self)
{
GError *err = NULL;
GnomeControlCenterPrivate *priv;
GdkScreen *screen;
priv = self->priv = CONTROL_CENTER_PRIVATE (self);
#ifdef HAVE_CHEESE
if (gtk_clutter_init (NULL, NULL) != CLUTTER_INIT_SUCCESS)
{
g_critical ("Clutter-GTK init failed");
return;
}
#endif /* HAVE_CHEESE */
priv->monitor_num = -1;
self->priv->small_screen = SMALL_SCREEN_UNSET;
/* load the user interface */
priv->builder = gtk_builder_new ();
if (!gtk_builder_add_from_file (priv->builder, UIDIR "/shell.ui", &err))
{
g_critical ("Could not build interface: %s", err->message);
g_error_free (err);
return;
}
/* connect various signals */
priv->window = W (priv->builder, "main-window");
gtk_window_set_hide_titlebar_when_maximized (GTK_WINDOW (priv->window), TRUE);
screen = gtk_widget_get_screen (priv->window);
g_signal_connect (screen, "monitors-changed", G_CALLBACK (monitors_changed_cb), self);
g_signal_connect (priv->window, "configure-event", G_CALLBACK (main_window_configure_cb), self);
g_signal_connect (priv->window, "notify::application", G_CALLBACK (application_set_cb), self);
g_signal_connect_swapped (priv->window, "delete-event", G_CALLBACK (g_object_unref), self);
g_signal_connect_after (priv->window, "key_press_event",
G_CALLBACK (window_key_press_event), self);
priv->notebook = W (priv->builder, "notebook");
/* Main scrolled window */
priv->scrolled_window = W (priv->builder, "scrolledwindow1");
gtk_widget_set_size_request (priv->scrolled_window, FIXED_WIDTH, -1);
priv->main_vbox = W (priv->builder, "main-vbox");
g_signal_connect (priv->notebook, "notify::page",
G_CALLBACK (notebook_page_notify_cb), priv);
g_signal_connect (gtk_builder_get_object (priv->builder, "home-button"),
"clicked", G_CALLBACK (home_button_clicked_cb), self);
/* keep a list of custom widgets to unload on panel change */
priv->custom_widgets = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
/* load the available settings panels */
setup_model (self);
/* load the panels that are implemented as plugins */
load_panel_plugins (self);
/* setup search functionality */
setup_search (self);
setup_lock (self);
/* store default window title and name */
priv->default_window_title = g_strdup (gtk_window_get_title (GTK_WINDOW (priv->window)));
priv->default_window_icon = g_strdup (gtk_window_get_icon_name (GTK_WINDOW (priv->window)));
notebook_page_notify_cb (GTK_NOTEBOOK (priv->notebook), NULL, priv);
}
