1 | /* |
2 | * Copyright (c) 2014 Benjamin Otte <ottte@gnome.org> |
3 | * |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2 of the License, or (at your option) any later version. |
8 | * |
9 | * This library is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library. If not, see <http://www.gnu.org/licenses/>. |
16 | */ |
17 | |
18 | #include "config.h" |
19 | |
20 | #include "graphdata.h" |
21 | |
22 | enum { |
23 | PROP_0, |
24 | PROP_N_VALUES |
25 | }; |
26 | |
27 | struct _GtkGraphDataPrivate |
28 | { |
29 | guint n_values; |
30 | guint offset; |
31 | double *values; |
32 | }; |
33 | |
34 | |
35 | G_DEFINE_TYPE_WITH_PRIVATE (GtkGraphData, gtk_graph_data, G_TYPE_OBJECT) |
36 | |
37 | static void |
38 | gtk_graph_data_get_property (GObject *object, |
39 | guint param_id, |
40 | GValue *value, |
41 | GParamSpec *pspec) |
42 | { |
43 | GtkGraphData *graph = GTK_GRAPH_DATA (object); |
44 | GtkGraphDataPrivate *priv = graph->priv; |
45 | |
46 | switch (param_id) |
47 | { |
48 | case PROP_N_VALUES: |
49 | g_value_set_boolean (value, v_boolean: priv->n_values); |
50 | break; |
51 | default: |
52 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); |
53 | } |
54 | } |
55 | |
56 | static void |
57 | gtk_graph_data_finalize (GObject *object) |
58 | { |
59 | GtkGraphData *graph = GTK_GRAPH_DATA (object); |
60 | GtkGraphDataPrivate *priv = graph->priv; |
61 | |
62 | g_free (mem: priv->values); |
63 | |
64 | G_OBJECT_CLASS (gtk_graph_data_parent_class)->finalize (object); |
65 | } |
66 | |
67 | static void |
68 | gtk_graph_data_set_property (GObject *object, |
69 | guint param_id, |
70 | const GValue *value, |
71 | GParamSpec *pspec) |
72 | { |
73 | GtkGraphData *graph = GTK_GRAPH_DATA (object); |
74 | GtkGraphDataPrivate *priv = graph->priv; |
75 | |
76 | switch (param_id) |
77 | { |
78 | case PROP_N_VALUES: |
79 | priv->n_values = g_value_get_uint (value); |
80 | priv->values = g_new0 (double, priv->n_values); |
81 | break; |
82 | default: |
83 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); |
84 | } |
85 | } |
86 | |
87 | static void |
88 | gtk_graph_data_class_init (GtkGraphDataClass *klass) |
89 | { |
90 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
91 | |
92 | object_class->finalize = gtk_graph_data_finalize; |
93 | object_class->get_property = gtk_graph_data_get_property; |
94 | object_class->set_property = gtk_graph_data_set_property; |
95 | |
96 | g_object_class_install_property (oclass: object_class, |
97 | property_id: PROP_N_VALUES, |
98 | pspec: g_param_spec_uint (name: "n-values" , |
99 | nick: "n values" , |
100 | blurb: "Number of values in the graph" , |
101 | minimum: 1, G_MAXUINT, default_value: 1, |
102 | flags: G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY)); |
103 | } |
104 | |
105 | static void |
106 | gtk_graph_data_init (GtkGraphData *graph) |
107 | { |
108 | graph->priv = gtk_graph_data_get_instance_private (self: graph); |
109 | } |
110 | |
111 | GtkGraphData * |
112 | gtk_graph_data_new (guint n_values) |
113 | { |
114 | return g_object_new (GTK_TYPE_GRAPH_DATA, |
115 | first_property_name: "n-values" , n_values, |
116 | NULL); |
117 | } |
118 | |
119 | guint |
120 | gtk_graph_data_get_n_values (GtkGraphData *data) |
121 | { |
122 | return data->priv->n_values; |
123 | } |
124 | |
125 | double |
126 | gtk_graph_data_get_value (GtkGraphData *data, |
127 | guint i) |
128 | { |
129 | GtkGraphDataPrivate *priv = data->priv; |
130 | |
131 | return priv->values[(priv->offset + i) % priv->n_values]; |
132 | } |
133 | |
134 | double |
135 | gtk_graph_data_get_minimum (GtkGraphData *data) |
136 | { |
137 | GtkGraphDataPrivate *priv = data->priv; |
138 | double minimum = G_MAXDOUBLE; |
139 | guint i; |
140 | |
141 | for (i = 0; i < priv->n_values; i++) |
142 | { |
143 | minimum = MIN (minimum, priv->values[i]); |
144 | } |
145 | |
146 | return minimum; |
147 | } |
148 | |
149 | double |
150 | gtk_graph_data_get_maximum (GtkGraphData *data) |
151 | { |
152 | GtkGraphDataPrivate *priv = data->priv; |
153 | double maximum = -G_MAXDOUBLE; |
154 | guint i; |
155 | |
156 | for (i = 0; i < priv->n_values; i++) |
157 | { |
158 | maximum = MAX (maximum, priv->values[i]); |
159 | } |
160 | |
161 | return maximum; |
162 | } |
163 | |
164 | void |
165 | gtk_graph_data_prepend_value (GtkGraphData *data, |
166 | double value) |
167 | { |
168 | GtkGraphDataPrivate *priv = data->priv; |
169 | |
170 | priv->offset = (priv->offset + priv->n_values - 1) % priv->n_values; |
171 | priv->values[priv->offset] = value; |
172 | } |
173 | |
174 | |