/**
* uber_line_graph_get_next_data:
* @graph: A #UberGraph.
*
* XXX
*
* Returns: None.
* Side effects: None.
*/
static gboolean
uber_line_graph_get_next_data (UberGraph *graph) /* IN */
{
UberLineGraphPrivate *priv;
LineInfo *line;
gdouble val;
gboolean ret = FALSE;
gint i;
g_return_val_if_fail(UBER_IS_LINE_GRAPH(graph), FALSE);
priv = UBER_LINE_GRAPH(graph)->priv;
/*
* Retrieve the next data point.
*/
if (priv->func) {
for (i = 0; i < priv->lines->len; i++) {
val = 0.;
line = &g_array_index(priv->lines, LineInfo, i);
if (!(ret = priv->func(UBER_LINE_GRAPH(graph),
i + 1, &val,
priv->func_data))) {
val = -INFINITY;
}
g_ring_append_val(line->raw_data, val);
/*
* TODO: Scale value.
*/
g_ring_append_val(line->scaled_data, val);
}
}
return ret;
}
/**
* uber_line_graph_init_ring:
* @ring: A #GRing.
*
* Initialize the #GRing to default values (-INFINITY).
*
* Returns: None.
* Side effects: None.
*/
static inline void
uber_line_graph_init_ring (GRing *ring) /* IN */
{
gdouble val = -INFINITY;
gint i;
g_return_if_fail(ring != NULL);
for (i = 0; i < ring->len; i++) {
g_ring_append_val(ring, val);
}
}
/**
* uber_line_graph_get_next_data:
* @graph: A #UberGraph.
*
* XXX
*
* Returns: None.
* Side effects: None.
*/
static gboolean
uber_line_graph_get_next_data (UberGraph *graph) /* IN */
{
UberLineGraphPrivate *priv;
gboolean scale_changed = FALSE;
gboolean ret = FALSE;
LineInfo *line;
gdouble val;
gint i;
g_return_val_if_fail(UBER_IS_LINE_GRAPH(graph), FALSE);
priv = UBER_LINE_GRAPH(graph)->priv;
/*
* Retrieve the next data point.
*/
if (priv->func) {
for (i = 0; i < priv->lines->len; i++) {
val = 0.;
line = &g_array_index(priv->lines, LineInfo, i);
if (!(ret = priv->func(UBER_LINE_GRAPH(graph),
i + 1, &val,
priv->func_data))) {
val = -INFINITY;
}
g_ring_append_val(line->raw_data, val);
if (priv->autoscale) {
if (val < priv->range.begin) {
priv->range.begin = val - (val * SCALE_FACTOR);
priv->range.range = priv->range.end - priv->range.begin;
scale_changed = TRUE;
} else if (val > priv->range.end) {
priv->range.end = val + (val * SCALE_FACTOR);
priv->range.range = priv->range.end - priv->range.begin;
scale_changed = TRUE;
}
}
}
}
if (scale_changed) {
uber_graph_scale_changed(graph);
}
return ret;
}