Some theme comment updates.

diff --git a/theme.lua b/theme.lua
index 1abaae9c32e955695a986a16a0383aae835672e5..e8adb6cde8390d8e7f13c80e25899ef23fda29df 100644 (file)
--- a/theme.lua
+++ b/theme.lua
@@ -306,6 +306,8 @@ end
 -- API ENTRY POINT
 -- Returns, given a channel number, which signal it corresponds to (starting from 0).
 -- Should return -1 if the channel does not correspond to a simple signal.
+-- (The information is used for whether right-click on the channel should bring up
+-- an input selector or not.)
 -- Called once for each channel, at the start of the program.
 -- Will never be called for live (0) or preview (1).
 function channel_signal(channel)
@@ -354,6 +356,7 @@ function get_transitions(t)
        finish_transitions(t)
 
        if live_signal_num == preview_signal_num then
+               -- No transitions possible.
                return {}
        end
 
@@ -383,6 +386,9 @@ function get_transitions(t)
        return {"Cut"}
 end
 
+-- API ENTRY POINT
+-- Called when the user clicks a transition button. For our case,
+-- we only do cuts, so we ignore the parameters; just switch live and preview.
 function transition_clicked(num, t)
        if num == 0 then
                -- Cut.