Added FbTk::relaySignal, which relays new signals to old Subject type signals.

1 files changed, 62 insertions, 0 deletions

diff --git a/src/FbTk/RelaySignal.hh b/src/FbTk/RelaySignal.hh
new file mode 100644
index 0000000..e9b7281
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+++ b/src/FbTk/RelaySignal.hh
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+// RelaySignal.hh
+// Copyright (c) 2010 Fluxbox Team (fluxgen at fluxbox dot org)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#ifndef FBTK_RELAY_SIGNAL_HH
+#define FBTK_RELAY_SIGNAL_HH
+
+#include "Signal.hh"
+#include "MemFun.hh"
+#include "Subject.hh"
+
+namespace FbTk {
+
+/**
+ * Relays a new signal type to the old subject type signal. When the new signal
+ * emits the subject notify() will be called.
+ * This function is temporary and just a helper during transition between old
+ * and new signal system.
+ *
+ * @param from The original source of the signal.
+ * @param to_subject The destination Subject.
+ */
+template < typename Signal >
+void relaySignal(Signal& from, FbTk::Subject& to_subject) {
+    from.connect(MemFunIgnoreArgs(to_subject, &FbTk::Subject::notify));
+}
+
+/**
+ * Relays a new signal type to the old subject type signal. When the new signal
+ * emits the subject notify() will be called.
+ * This function is temporary and just a helper during transition between old
+ * and new signal system.
+ *
+ * @param tracker Keeps track of signals
+ * @param from The original source of the signal.
+ * @param to_subject The destination Subject
+ */
+template < typename Signal >
+void relaySignal(SignalTracker& tracker, Signal& from, FbTk::Subject& to_subject) {
+    tracker.join(from, MemFunIgnoreArgs(to_subject, &FbTk::Subject::notify));
+}
+
+} // end namespace FbTk
+
+#endif // FBTK_RELAY_SIGNAL_HH