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/*
* Copyright (c) 2014 Benjamin Otte <ottte@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "graphdata.h"
enum {
PROP_0,
PROP_N_VALUES
};
struct _GtkGraphDataPrivate
{
guint n_values;
guint offset;
double *values;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkGraphData, gtk_graph_data, G_TYPE_OBJECT)
static void
gtk_graph_data_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkGraphData *graph = GTK_GRAPH_DATA (object);
GtkGraphDataPrivate *priv = graph->priv;
switch (param_id)
{
case PROP_N_VALUES:
g_value_set_boolean (value, priv->n_values);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
}
}
static void
gtk_graph_data_finalize (GObject *object)
{
GtkGraphData *graph = GTK_GRAPH_DATA (object);
GtkGraphDataPrivate *priv = graph->priv;
g_free (priv->values);
G_OBJECT_CLASS (gtk_graph_data_parent_class)->finalize (object);
}
static void
gtk_graph_data_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkGraphData *graph = GTK_GRAPH_DATA (object);
GtkGraphDataPrivate *priv = graph->priv;
switch (param_id)
{
case PROP_N_VALUES:
priv->n_values = g_value_get_uint (value);
priv->values = g_new0 (double, priv->n_values);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
}
}
static void
gtk_graph_data_class_init (GtkGraphDataClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_graph_data_finalize;
object_class->get_property = gtk_graph_data_get_property;
object_class->set_property = gtk_graph_data_set_property;
g_object_class_install_property (object_class,
PROP_N_VALUES,
g_param_spec_uint ("n-values", NULL, NULL,
1, G_MAXUINT, 1,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
}
static void
gtk_graph_data_init (GtkGraphData *graph)
{
graph->priv = gtk_graph_data_get_instance_private (graph);
}
GtkGraphData *
gtk_graph_data_new (guint n_values)
{
return g_object_new (GTK_TYPE_GRAPH_DATA,
"n-values", n_values,
NULL);
}
guint
gtk_graph_data_get_n_values (GtkGraphData *data)
{
return data->priv->n_values;
}
double
gtk_graph_data_get_value (GtkGraphData *data,
guint i)
{
GtkGraphDataPrivate *priv = data->priv;
return priv->values[(priv->offset + i) % priv->n_values];
}
double
gtk_graph_data_get_minimum (GtkGraphData *data)
{
GtkGraphDataPrivate *priv = data->priv;
double minimum = G_MAXDOUBLE;
guint i;
for (i = 0; i < priv->n_values; i++)
{
minimum = MIN (minimum, priv->values[i]);
}
return minimum;
}
double
gtk_graph_data_get_maximum (GtkGraphData *data)
{
GtkGraphDataPrivate *priv = data->priv;
double maximum = -G_MAXDOUBLE;
guint i;
for (i = 0; i < priv->n_values; i++)
{
maximum = MAX (maximum, priv->values[i]);
}
return maximum;
}
void
gtk_graph_data_prepend_value (GtkGraphData *data,
double value)
{
GtkGraphDataPrivate *priv = data->priv;
priv->offset = (priv->offset + priv->n_values - 1) % priv->n_values;
priv->values[priv->offset] = value;
}
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