Diff: kbd_mgr/KeyboardStateEventServer.h

Revision:

3:1310c57aca77

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kbd_mgr/KeyboardStateEventServer.h	Thu Feb 03 22:01:57 2011 +0000
@@ -0,0 +1,43 @@
+#ifndef KEYBOARD_STATE_EVENT_SERVER_H_
+#define KEYBOARD_STATE_EVENT_SERVER_H_
+
+#include "kbd_mgr/KeyboardEventServer.h"
+#include "kbd_mgr/KeyboardStateHandler.h"
+
+namespace kbd_mgr {
+
+/**
+ * @brief A keyboard state handler that reports only state changes.
+ */    
+class KeyboardStateEventServer : public KeyboardEventServer<KeyboardStateHandler> {
+public:
+    /**
+     * @brief Attaches the monitor to a function.
+     * @param fn       Event handler called to report keyboard state change.
+     */
+    void attach(FunctionKeyboardStateHandler::HandlerFunction fn) {
+        setHandler(new FunctionKeyboardStateHandler(fn));
+    }
+    
+    /**
+     * @brief Attaches the monitor to a method of an object.
+     * @param obj      Event handler object
+     * @param fn       Event handler method called to report keyboard state after each complete scan.
+     */
+    template <class T>
+    void attach(T *obj, typename MemberKeyboardStateHandler<T>::MemberFunction fn) {
+        setHandler(new MemberKeyboardStateHandler<T>(obj, fn));
+    }
+    
+    using  KeyboardEventServer<KeyboardStateHandler>::attach;
+    
+    void invokeHandler(const KeyboardState &state) {
+        if (this->hasHandler()) {
+            this->handler()->handleState(state);
+        }
+    }
+};
+
+} // kbd_mgr
+
+#endif // KEYBOARD_STATE_EVENT_SERVER_H_