Changeset 8fe1e2 for src/Patterns/Observer/Observable.hpp

Timestamp:

Dec 13, 2011, 9:46:12 AM (14 years ago)

Author:

Frederik Heber <heber@…>

Children:

75d156

Parents:

549b62

git-author:

Frederik Heber <heber@…> (12/02/11 09:58:19)

git-committer:

Frederik Heber <heber@…> (12/13/11 09:46:12)

Message:

Added Observable::signOn() to get int wrapped in class PriorityLevel.

• PriorityLevel makes the valid range check.
• also this is preparatory for using size_t channelno instead of the ref to the notification in signing on to channels.
• this is required for relaying notifications.

File:

• src/Patterns/Observer/Observable.hpp (modified) (4 diffs)

src/Patterns/Observer/Observable.hpp

@@ -18 +18 @@
 #include <string>
 
+#include "Range.hpp"
 #include "Observer/defs.hpp"
 #include "Observer/Observer.hpp"
@@ -35 +36 @@
   virtual ~Observable();
 
+  /** This class is only used to distinguish from size_t in the overload.
+   *
+   * It encapsulates a const int (the priority level) and checks valid bounds
+   * in constructor.
+   *
+   */
+  class PriorityLevel {
+  public:
+    explicit PriorityLevel(const int i);
+    ~PriorityLevel();
+
+    const int level;
+  private:
+    static range<int> ValidRange;
+  };
+
   /**
    * Sign an Observer on to this Observable. The Observer will be notified
@@ -46 +63 @@
    * ussually no need to order the update sequence.
    */
-  virtual void signOn(Observer *target, int priority=0) const;
+  virtual void signOn(Observer *target, PriorityLevel priority = PriorityDefault) const;
 
   /**
@@ -95 +112 @@
   static ChannelMap NotificationChannels;
 
+  static PriorityLevel PriorityDefault;
+
 private:
   typedef std::multimap<int,Observer*> callees_t;