libsysprof-gtk: start on new axis/series design

This will mean we move series work from libsysprof-analyze into
libsysprof-gtk so we get access to things like GtkExpression.

src/libsysprof-gtk/sysprof-normalized-series-item.c

@@ -0,0 +1,148 @@
+/* sysprof-normalized-series-item.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include "sysprof-normalized-series-item.h"
+
+struct _SysprofNormalizedSeriesItem
+{
+  GObject parent_instance;
+  GObject *item;
+  float value;
+};
+
+enum {
+  PROP_0,
+  PROP_ITEM,
+  PROP_VALUE,
+  N_PROPS
+};
+
+G_DEFINE_FINAL_TYPE (SysprofNormalizedSeriesItem, sysprof_normalized_series_item, G_TYPE_OBJECT)
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+sysprof_normalized_series_item_finalize (GObject *object)
+{
+  SysprofNormalizedSeriesItem *self = (SysprofNormalizedSeriesItem *)object;
+
+  g_clear_object (&self->item);
+
+  G_OBJECT_CLASS (sysprof_normalized_series_item_parent_class)->finalize (object);
+}
+
+static void
+sysprof_normalized_series_item_get_property (GObject    *object,
+                                             guint       prop_id,
+                                             GValue     *value,
+                                             GParamSpec *pspec)
+{
+  SysprofNormalizedSeriesItem *self = SYSPROF_NORMALIZED_SERIES_ITEM (object);
+
+  switch (prop_id)
+    {
+    case PROP_ITEM:
+      g_value_set_object (value, self->item);
+      break;
+
+    case PROP_VALUE:
+      g_value_set_float (value, self->value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_normalized_series_item_set_property (GObject      *object,
+                                             guint         prop_id,
+                                             const GValue *value,
+                                             GParamSpec   *pspec)
+{
+  SysprofNormalizedSeriesItem *self = SYSPROF_NORMALIZED_SERIES_ITEM (object);
+
+  switch (prop_id)
+    {
+    case PROP_ITEM:
+      self->item = g_value_dup_object (value);
+      break;
+
+    case PROP_VALUE:
+      self->value = g_value_get_float (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_normalized_series_item_class_init (SysprofNormalizedSeriesItemClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = sysprof_normalized_series_item_finalize;
+  object_class->get_property = sysprof_normalized_series_item_get_property;
+  object_class->set_property = sysprof_normalized_series_item_set_property;
+
+  properties [PROP_ITEM] =
+    g_param_spec_object ("item", NULL, NULL,
+                         G_TYPE_OBJECT,
+                         (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+
+  properties [PROP_VALUE] =
+    g_param_spec_float ("value", NULL, NULL,
+                        0, 1, 0,
+                        (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+sysprof_normalized_series_item_init (SysprofNormalizedSeriesItem *self)
+{
+}
+
+float
+sysprof_normalized_series_item_get_value (SysprofNormalizedSeriesItem *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_NORMALIZED_SERIES_ITEM (self), 0);
+
+  return self->value;
+}
+
+/**
+ * sysprof_normalized_series_item_get_item:
+ * @self: a #SysprofNormalizedSeriesItem
+ *
+ * Gets the underlying item the normalized value was calculated for.
+ *
+ * Returns: (transfer none) (type GObject): a #GObject
+ */
+gpointer
+sysprof_normalized_series_item_get_item (SysprofNormalizedSeriesItem *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_NORMALIZED_SERIES_ITEM (self), NULL);
+
+  return self->item;
+}