feedback-vibra: Allow derived classes to override duration

This allows the derived classes to perform the length duration
calculation.  The parent class can thus still keep track of the total
feedback length.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

src/fbd-feedback-vibra.c

@@ -8,6 +8,7 @@
 
 #include "fbd-enums.h"
 #include "fbd-feedback-vibra.h"
+#include "fbd-feedback-vibra-priv.h"
 #include "fbd-feedback-manager.h"
 
 /**
@@ -133,13 +134,16 @@ fbd_feedback_vibra_class_init (FbdFeedbackVibraClass *klass)
   base_class->run = fbd_feedback_vibra_run;
   base_class->end = fbd_feedback_vibra_end;
 
+  /**
+   * FbdFeedbackVibra:duration:
+   *
+   * The total duration of the feedback event in milliseconds.
+   */
   props[PROP_DURATION] =
     g_param_spec_uint (
-      "duration",
-      "Duration",
-      "Vibra event duration in msecs",
+      "duration", "", "",
       0, G_MAXUINT, FBD_FEEDBACK_VIBRA_DEFAULT_DURATION,
-      G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+      G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
 
   g_object_class_install_properties (object_class, PROP_LAST_PROP, props);
 }
@@ -158,3 +162,20 @@ fbd_feedback_vibra_get_duration (FbdFeedbackVibra *self)
   priv = fbd_feedback_vibra_get_instance_private (self);
   return priv->duration;
 }
+
+
+void
+fbd_feedback_vibra_set_duration (FbdFeedbackVibra *self, guint duration)
+{
+  FbdFeedbackVibraPrivate *priv;
+
+  g_return_if_fail (FBD_IS_FEEDBACK_VIBRA (self));
+
+  priv = fbd_feedback_vibra_get_instance_private (self);
+
+  if (duration == priv->duration)
+    return;
+
+  priv->duration = duration;
+  g_object_notify_by_pspec (G_OBJECT (self), props[PROP_DURATION]);
+}