Initial check in of EditorHook script transparent_regions.lua

scripts/transparent_regions.lua

@@ -0,0 +1,28 @@
+ardour {
+	["type"]    = "EditorHook",
+	name        = "Make all Regions Transparent",
+	author      = "Ardour Lua Task Force",
+	description = "While the transport is looping, all regions become transparent.",
+}
+
+function signals ()
+	return LuaSignal.Set():add (
+		{
+			[LuaSignal.TransportStateChange] = true,
+			[LuaSignal.TransportLooped] = true,
+		}
+	)
+end
+
+function factory ()
+	return function (signal, ref, ...)
+	local all_regions = ARDOUR.RegionFactory.regions()
+	for _, r in all_regions:iter() do
+		local ar = r:to_audioregion ();
+		if ar:isnil () then goto next end
+		if ar:opaque () then 
+			ar:set_opaque (false)
+		end
+		::next::
+	end
+end end