[gnome-flashback/wip/segeiger/gnome-3-18-inputmethods: 2/5] input-sources: add styles for hover states

[Sebastian Geiger <segeiger src gnome org>]

commit d84172a639cdf7c1acccc67a6973dabd65120ad2
Author: Sebastian Geiger <sbastig gmx net>
Date:   Sun Jan 17 10:36:10 2016 +0100

    input-sources: add styles for hover states

 gnome-flashback/Adwaita.css                        |    4 ++
 .../libinput-sources/gf-candidate-area.c           |   30 ++++++++++++++++++++
 2 files changed, 34 insertions(+), 0 deletions(-)
---
diff --git a/gnome-flashback/Adwaita.css b/gnome-flashback/Adwaita.css
index b9f1085..cf5ff31 100644
--- a/gnome-flashback/Adwaita.css
+++ b/gnome-flashback/Adwaita.css
@@ -22,3 +22,7 @@ FlashbackLabelWindow
 .selected .candidate-box {
     background: #7b7b7b;
 }
+
+.hover .candidate-box {
+    background: #8a8a8a;
+}
diff --git a/gnome-flashback/libinput-sources/gf-candidate-area.c 
b/gnome-flashback/libinput-sources/gf-candidate-area.c
index ae60b17..ae603cc 100644
--- a/gnome-flashback/libinput-sources/gf-candidate-area.c
+++ b/gnome-flashback/libinput-sources/gf-candidate-area.c
@@ -88,6 +88,32 @@ next_button_clicked_cb (GtkButton       *button,
   return GDK_EVENT_PROPAGATE;
 }
 
+static gboolean
+box_mouse_enter_cb (GtkWidget *widget,
+                    GdkEvent  *event,
+                    gpointer   user_data)
+{
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (widget);
+  gtk_style_context_add_class (context, "hover");
+
+  return GDK_EVENT_PROPAGATE;
+}
+
+static gboolean
+box_mouse_leave_cb (GtkWidget *widget,
+                    GdkEvent  *event,
+                    gpointer   user_data)
+{
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (widget);
+  gtk_style_context_remove_class (context, "hover");
+
+  return GDK_EVENT_PROPAGATE;
+}
+
 void
 gf_candidate_area_set_orientation (GfCandidateArea *area,
                                    IBusOrientation  orientation)
@@ -270,6 +296,10 @@ gf_candidate_area_init (GfCandidateArea *area)
 
       g_signal_connect (event_box, "button-release-event",
                         G_CALLBACK (button_clicked_cb), area);
+      g_signal_connect (event_box, "enter-notify-event",
+                        G_CALLBACK (box_mouse_enter_cb), area);
+      g_signal_connect (event_box, "leave-notify-event",
+                        G_CALLBACK (box_mouse_leave_cb), area);
     }
 
   area->button_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);