[gnome-control-center] display: Add some signals to the new configuration API

[Rui Matos <rtcm src gnome org>]

commit 7c89e30a4745d8c0486c9071dd11e65a8647f7db
Author: Rui Matos <tiagomatos gmail com>
Date:   Wed Aug 2 22:44:50 2017 +0200

    display: Add some signals to the new configuration API
    
    These will be useful to keep track of changes across different places
    in the new UI.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785949

 panels/display/cc-display-config-dbus.c |   14 +++++++++++++-
 panels/display/cc-display-config-rr.c   |   14 +++++++++++---
 panels/display/cc-display-config.c      |   25 +++++++++++++++++++++++++
 3 files changed, 49 insertions(+), 4 deletions(-)
---
diff --git a/panels/display/cc-display-config-dbus.c b/panels/display/cc-display-config-dbus.c
index ca657b0..d8f1798 100644
--- a/panels/display/cc-display-config-dbus.c
+++ b/panels/display/cc-display-config-dbus.c
@@ -448,6 +448,8 @@ cc_display_monitor_dbus_set_active (CcDisplayMonitor *pself,
       cc_display_monitor_dbus_set_logical_monitor (self, NULL);
       cc_display_config_dbus_ensure_gapless (self->config);
     }
+
+  g_signal_emit_by_name (self, "active");
 }
 
 static CcDisplayRotation
@@ -476,6 +478,8 @@ cc_display_monitor_dbus_set_rotation (CcDisplayMonitor *pself,
       /* See comment in ensure_gapless() for why we disregard the
          existing layout here. */
       cc_display_config_dbus_make_linear (self->config);
+
+      g_signal_emit_by_name (self, "rotation");
     }
 }
 
@@ -662,6 +666,8 @@ cc_display_monitor_dbus_set_mode (CcDisplayMonitor *pself,
 
   if (!cc_display_mode_dbus_is_supported_scale (mode, cc_display_monitor_get_scale (pself)))
     cc_display_monitor_set_scale (pself, cc_display_mode_get_preferred_scale (mode));
+
+  g_signal_emit_by_name (self, "mode");
 }
 
 static void
@@ -1095,10 +1101,16 @@ cc_display_config_dbus_set_primary (CcDisplayConfigDBus *self,
     return;
 
   if (self->primary && self->primary->logical_monitor)
-    self->primary->logical_monitor->primary = FALSE;
+    {
+      self->primary->logical_monitor->primary = FALSE;
+      g_signal_emit_by_name (self->primary, "primary");
+    }
 
   self->primary = new_primary;
   self->primary->logical_monitor->primary = TRUE;
+
+  g_signal_emit_by_name (self->primary, "primary");
+  g_signal_emit_by_name (self, "primary");
 }
 
 static void
diff --git a/panels/display/cc-display-config-rr.c b/panels/display/cc-display-config-rr.c
index 87af97c..945d307 100644
--- a/panels/display/cc-display-config-rr.c
+++ b/panels/display/cc-display-config-rr.c
@@ -215,7 +215,8 @@ cc_display_monitor_rr_set_active (CcDisplayMonitor *pself,
 {
   CcDisplayMonitorRR *self = CC_DISPLAY_MONITOR_RR (pself);
 
-  return gnome_rr_output_info_set_active (self->output_info, active);
+  gnome_rr_output_info_set_active (self->output_info, active);
+  g_signal_emit_by_name (self, "active");
 }
 
 static CcDisplayRotation
@@ -237,8 +238,9 @@ cc_display_monitor_rr_set_rotation (CcDisplayMonitor *pself,
 {
   CcDisplayMonitorRR *self = CC_DISPLAY_MONITOR_RR (pself);
 
-  return gnome_rr_output_info_set_rotation (self->output_info,
-                                            rotation_map[rotation]);
+  gnome_rr_output_info_set_rotation (self->output_info,
+                                     rotation_map[rotation]);
+  g_signal_emit_by_name (self, "rotation");
 }
 
 static gboolean
@@ -339,6 +341,7 @@ cc_display_monitor_rr_set_mode (CcDisplayMonitor *pself,
 
   gnome_rr_output_info_set_refresh_rate (self->output_info,
                                          cc_display_mode_get_freq (mode));
+  g_signal_emit_by_name (self, "mode");
 }
 
 static void
@@ -475,8 +478,13 @@ cc_display_config_rr_set_primary (CcDisplayConfigRR *self,
     return;
 
   gnome_rr_output_info_set_primary (self->primary->output_info, FALSE);
+  g_signal_emit_by_name (self->primary, "primary");
+
   self->primary = new_primary;
   gnome_rr_output_info_set_primary (self->primary->output_info, TRUE);
+  g_signal_emit_by_name (self->primary, "primary");
+
+  g_signal_emit_by_name (self, "primary");
 }
 
 static void
diff --git a/panels/display/cc-display-config.c b/panels/display/cc-display-config.c
index 6a854d6..aee1efe 100644
--- a/panels/display/cc-display-config.c
+++ b/panels/display/cc-display-config.c
@@ -82,6 +82,26 @@ cc_display_monitor_init (CcDisplayMonitor *self)
 static void
 cc_display_monitor_class_init (CcDisplayMonitorClass *klass)
 {
+  g_signal_new ("rotation",
+                CC_TYPE_DISPLAY_MONITOR,
+                G_SIGNAL_RUN_LAST,
+                0, NULL, NULL, NULL,
+                G_TYPE_NONE, 0);
+  g_signal_new ("mode",
+                CC_TYPE_DISPLAY_MONITOR,
+                G_SIGNAL_RUN_LAST,
+                0, NULL, NULL, NULL,
+                G_TYPE_NONE, 0);
+  g_signal_new ("primary",
+                CC_TYPE_DISPLAY_MONITOR,
+                G_SIGNAL_RUN_LAST,
+                0, NULL, NULL, NULL,
+                G_TYPE_NONE, 0);
+  g_signal_new ("active",
+                CC_TYPE_DISPLAY_MONITOR,
+                G_SIGNAL_RUN_LAST,
+                0, NULL, NULL, NULL,
+                G_TYPE_NONE, 0);
 }
 
 const char *
@@ -237,6 +257,11 @@ cc_display_config_init (CcDisplayConfig *self)
 static void
 cc_display_config_class_init (CcDisplayConfigClass *klass)
 {
+  g_signal_new ("primary",
+                CC_TYPE_DISPLAY_CONFIG,
+                G_SIGNAL_RUN_LAST,
+                0, NULL, NULL, NULL,
+                G_TYPE_NONE, 0);
 }
 
 GList *