mackie: redesign display logic entirely

Strips now maintain a pair of pending display strings (upper and lower).
A periodic timeout writes the pending value to the actual hardware if it
differs from the current string. This new design makes it easy to put a
message on the display and then after some period of time, revert to
whatever was there before.

1 files changed, 4 insertions, 0 deletions

diff --git a/libs/surfaces/mackie/meter.h b/libs/surfaces/mackie/meter.h
index 9a5d88ed23..17972fb480 100644
--- a/libs/surfaces/mackie/meter.h
+++ b/libs/surfaces/mackie/meter.h
@@ -34,9 +34,12 @@ class Meter : public Control
 public:
 	Meter (int id, std::string name, Group & group)
 		: Control  (id, name, group)
+		, _enabled (false)
 		, overload_on (false) {}
 
+
 	void send_update (Surface&, float dB);
+	bool enabled () const { return _enabled; }
 
 	MidiByteArray zero();
 
@@ -45,6 +48,7 @@ public:
 	void notify_metering_state_changed(Surface& surface, bool transport_is_rolling, bool metering_active);
 
   private:
+	bool _enabled;
 	bool overload_on;
 };