[sysprof/wip/visualizers] visualizers: wire zoom manager to visualizers

[Christian Hergert <chergert src gnome org>]

commit b9b96184cde2d7034ffcfd8db744d482559887c4
Author: Christian Hergert <chergert redhat com>
Date:   Wed Sep 28 19:56:39 2016 -0700

    visualizers: wire zoom manager to visualizers
    
    This gets the basic zoom control working. I anticipate we'll
    need some additional changes once we land panning support.

 lib/sp-line-visualizer-row.c  |   22 ++++++--
 lib/sp-visualizer-row.c       |    2 +
 lib/sp-visualizer-view.c      |  116 ++++++++++++++++++++++++++++++++++-------
 lib/sp-visualizer-view.h      |   12 +++--
 src/resources/ui/sp-window.ui |    1 +
 5 files changed, 125 insertions(+), 28 deletions(-)
---
diff --git a/lib/sp-line-visualizer-row.c b/lib/sp-line-visualizer-row.c
index 45471e9..2e42955 100644
--- a/lib/sp-line-visualizer-row.c
+++ b/lib/sp-line-visualizer-row.c
@@ -336,10 +336,13 @@ sp_line_visualizer_row_do_reload (gpointer data)
 
   priv->queued_load = 0;
 
-  sp_line_visualizer_row_load_data_async (self,
-                                          NULL,
-                                          sp_line_visualizer_row_load_data_cb,
-                                          NULL);
+  if (priv->reader != NULL)
+    {
+      sp_line_visualizer_row_load_data_async (self,
+                                              NULL,
+                                              sp_line_visualizer_row_load_data_cb,
+                                              NULL);
+    }
 
   return G_SOURCE_REMOVE;
 }
@@ -443,6 +446,16 @@ sp_line_visualizer_row_style_updated (GtkWidget *widget)
     }
 }
 
+static void
+sp_line_visualizer_row_set_time_range (SpVisualizerRow *row,
+                                       gint64           begin_time,
+                                       gint64           end_time)
+{
+  g_assert (SP_IS_LINE_VISUALIZER_ROW (row));
+  g_assert (begin_time <= end_time);
+
+  sp_line_visualizer_row_queue_reload (SP_LINE_VISUALIZER_ROW (row));
+}
 
 static void
 sp_line_visualizer_row_destroy (GtkWidget *widget)
@@ -532,6 +545,7 @@ sp_line_visualizer_row_class_init (SpLineVisualizerRowClass *klass)
   widget_class->style_updated = sp_line_visualizer_row_style_updated;
 
   visualizer_class->set_reader = sp_line_visualizer_row_set_reader;
+  visualizer_class->set_time_range = sp_line_visualizer_row_set_time_range;
 
   properties [PROP_TITLE] =
     g_param_spec_string ("title",
diff --git a/lib/sp-visualizer-row.c b/lib/sp-visualizer-row.c
index 155b0e5..6983409 100644
--- a/lib/sp-visualizer-row.c
+++ b/lib/sp-visualizer-row.c
@@ -67,6 +67,8 @@ sp_visualizer_row_set_time_range (SpVisualizerRow *self,
 
   if (SP_VISUALIZER_ROW_GET_CLASS (self)->set_time_range)
     SP_VISUALIZER_ROW_GET_CLASS (self)->set_time_range (self, begin_time, end_time);
+
+  gtk_widget_queue_draw (GTK_WIDGET (self));
 }
 
 void
diff --git a/lib/sp-visualizer-view.c b/lib/sp-visualizer-view.c
index ec53892..39f90f3 100644
--- a/lib/sp-visualizer-view.c
+++ b/lib/sp-visualizer-view.c
@@ -24,17 +24,21 @@
 #include "sp-visualizer-ticks.h"
 #include "sp-visualizer-view.h"
 
+#define NSEC_PER_SEC G_GINT64_CONSTANT(1000000000)
+
 typedef struct
 {
   SpCaptureReader   *reader;
 
   SpVisualizerList  *list;
   SpVisualizerTicks *ticks;
+  SpZoomManager     *zoom_manager;
 } SpVisualizerViewPrivate;
 
 enum {
   PROP_0,
   PROP_READER,
+  PROP_ZOOM_MANAGER,
   N_PROPS
 };
 
@@ -81,12 +85,37 @@ sp_visualizer_view_row_removed (SpVisualizerView *self,
 }
 
 static void
+sp_visualizer_view_notify_zoom (SpVisualizerView *self,
+                                GParamSpec       *pspec,
+                                SpZoomManager    *zoom_manager)
+{
+  SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
+  gint64 begin_time = 0.0;
+  gint64 end_time;
+  gdouble zoom;
+
+  g_assert (SP_IS_VISUALIZER_VIEW (self));
+  g_assert (SP_IS_ZOOM_MANAGER (zoom_manager));
+
+  zoom = sp_zoom_manager_get_zoom (zoom_manager);
+
+  if (priv->reader != NULL)
+    begin_time = sp_capture_reader_get_start_time (priv->reader);
+
+  end_time = begin_time + (NSEC_PER_SEC * 60.0 / zoom);
+
+  sp_visualizer_list_set_time_range (priv->list, begin_time, end_time);
+  sp_visualizer_ticks_set_time_range (priv->ticks, begin_time, end_time);
+}
+
+static void
 sp_visualizer_view_finalize (GObject *object)
 {
   SpVisualizerView *self = (SpVisualizerView *)object;
   SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
 
   g_clear_pointer (&priv->reader, sp_capture_reader_unref);
+  g_clear_object (&priv->zoom_manager);
 
   G_OBJECT_CLASS (sp_visualizer_view_parent_class)->finalize (object);
 }
@@ -105,6 +134,10 @@ sp_visualizer_view_get_property (GObject    *object,
       g_value_set_boxed (value, sp_visualizer_view_get_reader (self));
       break;
 
+    case PROP_ZOOM_MANAGER:
+      g_value_set_object (value, sp_visualizer_view_get_zoom_manager (self));
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
@@ -124,6 +157,10 @@ sp_visualizer_view_set_property (GObject      *object,
       sp_visualizer_view_set_reader (self, g_value_get_boxed (value));
       break;
 
+    case PROP_ZOOM_MANAGER:
+      sp_visualizer_view_set_zoom_manager (self, g_value_get_object (value));
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
@@ -146,6 +183,13 @@ sp_visualizer_view_class_init (SpVisualizerViewClass *klass)
                         SP_TYPE_CAPTURE_READER,
                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 
+  properties [PROP_ZOOM_MANAGER] =
+    g_param_spec_object ("zoom-manager",
+                         "Zoom Manager",
+                         "The zoom manager for the view",
+                         SP_TYPE_ZOOM_MANAGER,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
   g_object_class_install_properties (object_class, N_PROPS, properties);
 
   signals [VISUALIZER_ADDED] =
@@ -211,31 +255,18 @@ sp_visualizer_view_set_reader (SpVisualizerView *self,
                                SpCaptureReader  *reader)
 {
   SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
-  gint64 begin_time = 0;
-  gint64 end_time = 0;
 
   g_return_if_fail (SP_IS_VISUALIZER_VIEW (self));
 
-  if (reader != NULL)
+  if (priv->reader != reader)
     {
-      gint64 real_end_time;
-
-      begin_time = sp_capture_reader_get_start_time (reader);
-      real_end_time = sp_capture_reader_get_end_time (reader);
-
-      end_time = begin_time + (G_GINT64_CONSTANT (1000000000) * 60);
-
-      /* If we were able to extract a proper end time and its less
-       * than 60 seconds, we will use the whole width to show that.
-       */
-      if (real_end_time > 0 && real_end_time < end_time)
-        end_time = real_end_time;
+      g_clear_pointer (&priv->reader, sp_capture_reader_unref);
+      priv->reader = sp_capture_reader_ref (reader);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_READER]);
+      sp_visualizer_list_set_reader (priv->list, reader);
+      if (priv->zoom_manager != NULL)
+        sp_visualizer_view_notify_zoom (self, NULL, priv->zoom_manager);
     }
-
-  sp_visualizer_list_set_reader (priv->list, reader);
-  sp_visualizer_list_set_time_range (priv->list, begin_time, end_time);
-
-  sp_visualizer_ticks_set_time_range (priv->ticks, 0, end_time - begin_time);
 }
 
 static void
@@ -266,3 +297,48 @@ buildable_iface_init (GtkBuildableIface *iface)
   parent_buildable = g_type_interface_peek_parent (iface);
   iface->add_child = sp_visualizer_view_add_child;
 }
+
+SpZoomManager *
+sp_visualizer_view_get_zoom_manager (SpVisualizerView *self)
+{
+  SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
+
+  g_return_val_if_fail (SP_IS_VISUALIZER_VIEW (self), NULL);
+
+  return priv->zoom_manager;
+}
+
+void
+sp_visualizer_view_set_zoom_manager (SpVisualizerView *self,
+                                     SpZoomManager    *zoom_manager)
+{
+  SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
+
+  g_return_if_fail (SP_IS_VISUALIZER_VIEW (self));
+  g_return_if_fail (!zoom_manager || SP_IS_ZOOM_MANAGER (zoom_manager));
+
+  if (zoom_manager != priv->zoom_manager)
+    {
+      if (priv->zoom_manager != NULL)
+        {
+          g_signal_handlers_disconnect_by_func (priv->zoom_manager,
+                                                G_CALLBACK (sp_visualizer_view_notify_zoom),
+                                                self);
+          g_clear_object (&priv->zoom_manager);
+        }
+
+      if (zoom_manager != NULL)
+        {
+          priv->zoom_manager = g_object_ref (zoom_manager);
+          g_signal_connect_object (priv->zoom_manager,
+                                   "notify::zoom",
+                                   G_CALLBACK (sp_visualizer_view_notify_zoom),
+                                   self,
+                                   G_CONNECT_SWAPPED);
+          sp_visualizer_view_notify_zoom (self, NULL, priv->zoom_manager);
+        }
+
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_ZOOM_MANAGER]);
+      gtk_widget_queue_draw (GTK_WIDGET (self));
+    }
+}
diff --git a/lib/sp-visualizer-view.h b/lib/sp-visualizer-view.h
index b1e00a7..ea49cb9 100644
--- a/lib/sp-visualizer-view.h
+++ b/lib/sp-visualizer-view.h
@@ -22,6 +22,7 @@
 #include <gtk/gtk.h>
 
 #include "sp-visualizer-row.h"
+#include "sp-zoom-manager.h"
 
 G_BEGIN_DECLS
 
@@ -56,10 +57,13 @@ struct _SpVisualizerViewClass
   gpointer _reserved16;
 };
 
-GtkWidget       *sp_visualizer_view_new        (void);
-SpCaptureReader *sp_visualizer_view_get_reader (SpVisualizerView *self);
-void             sp_visualizer_view_set_reader (SpVisualizerView *self,
-                                                SpCaptureReader  *reader);
+GtkWidget       *sp_visualizer_view_new              (void);
+SpCaptureReader *sp_visualizer_view_get_reader       (SpVisualizerView *self);
+void             sp_visualizer_view_set_reader       (SpVisualizerView *self,
+                                                      SpCaptureReader  *reader);
+SpZoomManager   *sp_visualizer_view_get_zoom_manager (SpVisualizerView *self);
+void             sp_visualizer_view_set_zoom_manager (SpVisualizerView *self,
+                                                      SpZoomManager    *zoom_manager);
 
 G_END_DECLS
 
diff --git a/src/resources/ui/sp-window.ui b/src/resources/ui/sp-window.ui
index 112335e..4324d9f 100644
--- a/src/resources/ui/sp-window.ui
+++ b/src/resources/ui/sp-window.ui
@@ -168,6 +168,7 @@
                 <child>
                   <object class="SpVisualizerView" id="visualizers">
                     <property name="visible">true</property>
+                    <property name="zoom-manager">zoom_manager</property>
                     <child type="visualizer">
                       <object class="SpCpuVisualizerRow" id="cpu_row">
                         <property name="title" translatable="yes">CPU</property>