better touch exit

monitorReceiver.lua

@@ -125,6 +125,9 @@ function get_messages(buffer)
     -- request data and measure elapsed time
     local timer_id = os.startTimer(options.timeout)
     system.modem.transmit(channel, channel, 'print')
+
+    -- keep track of exit condition
+    local touchExit = false
     while true do
         -- get next pull event
         local event, _, senderChannel, _, message, _ = os.pullEvent()
@@ -140,13 +143,21 @@ function get_messages(buffer)
             system.timeout = true
             return
         elseif event == 'monitor_touch' then
-            system.index = system.index % #system.components + 1
-            break
+            touchExit = true
         end
     end
 
     -- cancel timer on success
     os.cancelTimer(timer_id)
+
+    -- increment index and clear terminal on exit by touch
+    if touchExit then
+        term.clear()
+        system.index = system.index % #system.components + 1
+        return false
+    end
+
+    return true
 end
 
 -- main program
@@ -161,8 +172,7 @@ function main()
             term.setCursorPos(1, 1)
 
             local buffer = {}
-            get_messages(buffer)
-            display_messages(buffer)
+            if get_messages(buffer) then display_messages(buffer) end
         end
 
         -- reset terminal