[mutter/wip/tablet-protocol-v2: 69/70] backends: Implement the "Show OSD" action.

[Carlos Garnacho <carlosg src gnome org>]

commit 07e4aa294112cd3bade2f95fd7d75b5e6ec82b41
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jun 22 19:16:18 2016 +0200

    backends: Implement the "Show OSD" action.
    
    This goes through the MetaDisplay:show-pad-osd signal.

 src/backends/meta-input-settings-private.h |    3 ++
 src/backends/meta-input-settings.c         |   52 +++++++++++++++++++++++++++-
 2 files changed, 54 insertions(+), 1 deletions(-)
---
diff --git a/src/backends/meta-input-settings-private.h b/src/backends/meta-input-settings-private.h
index 40c681c..61e2441 100644
--- a/src/backends/meta-input-settings-private.h
+++ b/src/backends/meta-input-settings-private.h
@@ -126,6 +126,9 @@ gboolean                   meta_input_settings_handle_pad_button         (MetaIn
 gchar *                    meta_input_settings_get_pad_button_action_label (MetaInputSettings 
*input_settings,
                                                                             ClutterInputDevice *pad,
                                                                             guint               button);
+void                       meta_input_settings_show_pad_osd                (MetaInputSettings  
*input_settings,
+                                                                            ClutterInputDevice *pad,
+                                                                            gboolean            
edition_mode);
 
 #ifdef HAVE_LIBWACOM
 WacomDevice * meta_input_settings_get_tablet_wacom_device (MetaInputSettings *settings,
diff --git a/src/backends/meta-input-settings.c b/src/backends/meta-input-settings.c
index c23c0f4..e9bde14 100644
--- a/src/backends/meta-input-settings.c
+++ b/src/backends/meta-input-settings.c
@@ -72,6 +72,9 @@ struct _MetaInputSettingsPrivate
 #ifdef HAVE_LIBWACOM
   WacomDeviceDatabase *wacom_db;
 #endif
+
+  ClutterActor *osd;
+  ClutterInputDevice *osd_pad;
 };
 
 typedef void (*ConfigBoolFunc)   (MetaInputSettings  *input_settings,
@@ -1085,6 +1088,9 @@ meta_input_settings_device_removed (ClutterDeviceManager *device_manager,
 
   priv = meta_input_settings_get_instance_private (input_settings);
   g_hash_table_remove (priv->mappable_devices, device);
+
+  if (device == priv->osd_pad)
+    clutter_actor_destroy (priv->osd);
 }
 
 static void
@@ -1445,6 +1451,18 @@ meta_input_settings_is_pad_button_grabbed (MetaInputSettings  *input_settings,
           G_DESKTOP_PAD_BUTTON_ACTION_NONE);
 }
 
+static void
+osd_weak_ref_notify (gpointer user_data,
+                     GObject *destroyed_object)
+{
+  MetaInputSettings *input_settings = user_data;
+  MetaInputSettingsPrivate *priv;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+  priv->osd_pad = NULL;
+  priv->osd = NULL;
+}
+
 gboolean
 meta_input_settings_handle_pad_button (MetaInputSettings  *input_settings,
                                        ClutterInputDevice *pad,
@@ -1461,6 +1479,9 @@ meta_input_settings_handle_pad_button (MetaInputSettings  *input_settings,
 
   priv = meta_input_settings_get_instance_private (input_settings);
 
+  if (priv->osd)
+    return FALSE;
+
   action = meta_input_settings_get_pad_button_action (input_settings, pad, button);
 
   switch (action)
@@ -1469,8 +1490,11 @@ meta_input_settings_handle_pad_button (MetaInputSettings  *input_settings,
       if (is_press)
         meta_input_settings_cycle_tablet_output (input_settings, pad);
       return TRUE;
-    case G_DESKTOP_PAD_BUTTON_ACTION_KEYBINDING:
     case G_DESKTOP_PAD_BUTTON_ACTION_HELP:
+      if (is_press)
+        meta_input_settings_show_pad_osd (input_settings, pad, FALSE);
+      return TRUE;
+    case G_DESKTOP_PAD_BUTTON_ACTION_KEYBINDING:
     case G_DESKTOP_PAD_BUTTON_ACTION_NONE:
     default:
       return FALSE;
@@ -1513,3 +1537,29 @@ meta_input_settings_get_pad_button_action_label (MetaInputSettings *input_settin
       return NULL;
     }
 }
+
+void
+meta_input_settings_show_pad_osd (MetaInputSettings  *input_settings,
+                                  ClutterInputDevice *pad,
+                                  gboolean            edition_mode)
+{
+  MetaInputSettingsPrivate *priv;
+  DeviceMappingInfo *info;
+  ClutterActor *osd;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+
+  if (priv->osd)
+    clutter_actor_destroy (priv->osd);
+
+  info = g_hash_table_lookup (priv->mappable_devices, pad);
+  g_signal_emit_by_name (meta_get_display (), "show-pad-osd",
+                         pad, info->settings, edition_mode, &osd);
+
+  if (osd)
+    {
+      g_object_weak_ref (G_OBJECT (osd), osd_weak_ref_notify, input_settings);
+      priv->osd_pad = pad;
+      priv->osd = osd;
+    }
+}