sysprof: bind utility traceables to samples view stack child

We want the traceables to match the selection in either the callgraph or
the flamegraph, depending which is visible. The summary is not currently
implemented for flamegraph as it is already naturally a summary by virtue
of it's colorization.

Fixes #95

src/sysprof/sysprof-samples-section.c

@@ -20,6 +20,8 @@
 
 #include "config.h"
 
+#include <adwaita.h>
+
 #include "sysprof-chart.h"
 #include "sysprof-column-layer.h"
 #include "sysprof-flame-graph.h"
@@ -41,10 +43,21 @@ struct _SysprofSamplesSection
   SysprofSection parent_instance;
 
   SysprofWeightedCallgraphView *callgraph_view;
+  SysprofFlameGraph *flamegraph;
+  AdwViewStack *stack;
 };
 
 G_DEFINE_FINAL_TYPE (SysprofSamplesSection, sysprof_samples_section, SYSPROF_TYPE_SECTION)
 
+enum {
+  PROP_0,
+  PROP_UTILITY_TRACEABLES,
+  PROP_UTILITY_SUMMARY,
+  N_PROPS
+};
+
+static GParamSpec *properties[N_PROPS];
+
 static char *
 format_number (gpointer unused,
                guint    number)
@@ -54,6 +67,15 @@ format_number (gpointer unused,
   return g_strdup_printf ("%'u", number);
 }
 
+static void
+notify_utility_traceables_cb (SysprofSamplesSection *self,
+                              GParamSpec            *pspec,
+                              GObject               *instance)
+{
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_UTILITY_TRACEABLES]);
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_UTILITY_SUMMARY]);
+}
+
 static void
 sysprof_samples_section_dispose (GObject *object)
 {
@@ -64,6 +86,45 @@ sysprof_samples_section_dispose (GObject *object)
   G_OBJECT_CLASS (sysprof_samples_section_parent_class)->dispose (object);
 }
 
+static void
+sysprof_samples_section_get_property (GObject    *object,
+                                      guint       prop_id,
+                                      GValue     *value,
+                                      GParamSpec *pspec)
+{
+  SysprofSamplesSection *self = SYSPROF_SAMPLES_SECTION (object);
+
+  switch (prop_id)
+    {
+    case PROP_UTILITY_SUMMARY:
+      if (self->stack != NULL)
+        {
+          GtkWidget *visible_child = adw_view_stack_get_visible_child (self->stack);
+
+          if (gtk_widget_is_ancestor (GTK_WIDGET (self->flamegraph), visible_child))
+            return;
+
+          g_object_get_property (G_OBJECT (self->callgraph_view), "utility-summary", value);
+        }
+      break;
+
+    case PROP_UTILITY_TRACEABLES:
+      if (self->stack != NULL)
+        {
+          GtkWidget *visible_child = adw_view_stack_get_visible_child (self->stack);
+
+          if (gtk_widget_is_ancestor (GTK_WIDGET (self->flamegraph), visible_child))
+            g_object_get_property (G_OBJECT (self->flamegraph), "utility-traceables", value);
+          else
+            g_object_get_property (G_OBJECT (self->callgraph_view), "utility-traceables", value);
+        }
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
 static void
 sysprof_samples_section_class_init (SysprofSamplesSectionClass *klass)
 {
@@ -71,10 +132,26 @@ sysprof_samples_section_class_init (SysprofSamplesSectionClass *klass)
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
   object_class->dispose = sysprof_samples_section_dispose;
+  object_class->get_property = sysprof_samples_section_get_property;
+
+  properties [PROP_UTILITY_SUMMARY] =
+    g_param_spec_object ("utility-summary", NULL, NULL,
+                         G_TYPE_LIST_MODEL,
+                         (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+  properties [PROP_UTILITY_TRACEABLES] =
+    g_param_spec_object ("utility-traceables", NULL, NULL,
+                         G_TYPE_LIST_MODEL,
+                         (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
 
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/sysprof/sysprof-samples-section.ui");
   gtk_widget_class_bind_template_child (widget_class, SysprofSamplesSection, callgraph_view);
+  gtk_widget_class_bind_template_child (widget_class, SysprofSamplesSection, flamegraph);
+  gtk_widget_class_bind_template_child (widget_class, SysprofSamplesSection, stack);
   gtk_widget_class_bind_template_callback (widget_class, format_number);
+  gtk_widget_class_bind_template_callback (widget_class, notify_utility_traceables_cb);
 
   g_type_ensure (SYSPROF_TYPE_CATEGORY_SUMMARY);
   g_type_ensure (SYSPROF_TYPE_CHART);
@@ -95,4 +172,7 @@ static void
 sysprof_samples_section_init (SysprofSamplesSection *self)
 {
   gtk_widget_init_template (GTK_WIDGET (self));
+
+  g_assert (self->flamegraph);
+  g_assert (self->callgraph_view);
 }

src/sysprof/sysprof-samples-section.ui

@@ -82,12 +82,14 @@
         <child>
           <object class="AdwViewStack" id="stack">
             <property name="vexpand">true</property>
+            <signal name="notify::visible-child" handler="notify_utility_traceables_cb" swapped="true"/>
             <child>
               <object class="AdwViewStackPage">
                 <property name="icon-name">threads-symbolic</property>
                 <property name="title" translatable="yes">Callgraph</property>
                 <property name="child">
                   <object class="SysprofWeightedCallgraphView" id="callgraph_view">
+                    <signal name="notify::utility-traceables" handler="notify_utility_traceables_cb" swapped="true"/>
                     <property name="vexpand">true</property>
                     <binding name="include-threads">
                       <lookup name="include-threads" type="SysprofSession">
@@ -172,7 +174,8 @@
                   <object class="GtkScrolledWindow">
                     <property name="hscrollbar-policy">never</property>
                     <property name="child">
-                      <object class="SysprofFlameGraph">
+                      <object class="SysprofFlameGraph" id="flamegraph">
+                        <signal name="notify::utility-traceables" handler="notify_utility_traceables_cb" swapped="true"/>
                         <binding name="callgraph">
                           <lookup name="callgraph">callgraph_view</lookup>
                         </binding>
@@ -216,7 +219,7 @@
                   <lookup name="session">SysprofSamplesSection</lookup>
                 </binding>
                 <binding name="traceables">
-                  <lookup name="utility-traceables">callgraph_view</lookup>
+                  <lookup name="utility-traceables">SysprofSamplesSection</lookup>
                 </binding>
               </object>
             </child>
@@ -232,7 +235,7 @@
                     <property name="model">
                       <object class="GtkNoSelection">
                         <binding name="model">
-                          <lookup name="utility-summary">callgraph_view</lookup>
+                          <lookup name="utility-summary">SysprofSamplesSection</lookup>
                         </binding>
                       </object>
                     </property>