From 18f1de1b26371edbae4b3250836df413c0817aba Mon Sep 17 00:00:00 2001
From: Florian Streibelt <florian@freitagsrunde.org>
Date: Sat, 15 Oct 2011 05:38:14 +0200
Subject: [PATCH] screensaver now implemented in python (too) including idle
 message per state.

---
 client-barcode/freitagskasse.py | 91 ++++++++++++++++++++++++++++-----
 display-daemon/ser.c            |  2 +-
 2 files changed, 80 insertions(+), 13 deletions(-)

diff --git a/client-barcode/freitagskasse.py b/client-barcode/freitagskasse.py
index a8ec903..f1f1daa 100644
--- a/client-barcode/freitagskasse.py
+++ b/client-barcode/freitagskasse.py
@@ -38,6 +38,17 @@ display_fifo = None
 scroll_line1 = None
 scroll_line2 = None
 
+idlemessage = None
+
+offset_line1 = 0
+offset_line2 = 0
+
+brightness  = 5
+screensaver = 0
+
+SCREENSAVER_DIM     = 30
+SCREENSAVER_TIMEOUT = 90
+SCREENSAVER_OFF     = 300
 
 lock = allocate_lock()
 
@@ -59,25 +70,72 @@ def display_scroll_text(line,text):
 
 def display_handle_scroll(line,text,offset):
 	if (text):
-		send_display("\x1f\x24\x01%c%s" % (chr(line),text[offset:(20+offset)]))
 		l = len(text)
-		missing_chars=20+offset-l
-		if (missing_chars>0):
-			send_display(text[:missing_chars])
-		offset=((offset+1)%l)
+		if (l<21):
+			if (offset == 0):
+				send_display("\x1f\x24\x01%c%s" % (chr(line),text[offset:(20+offset)]))
+				offset=1
+		else:
+			send_display("\x1f\x24\x01%c%s" % (chr(line),text[offset:(20+offset)]))
+			missing_chars=20+offset-l
+			if (missing_chars>0):
+				send_display(text[:missing_chars])
+			offset=((offset+1)%l)
 	else:
 		offset=0	#reset offset
 	return offset
 
+
+def display_cmd_dim(x):
+	global brightness
+	if (brightness!=x):
+		if (x==0): #turn off:
+			send_display("\x1F\x45%c" % chr(255) )
+			brightness = x
+			return
+			
+		else:
+			if (brightness==0): #turn on, then set wanted brightness:
+				send_display("\x1F\x45%c" % chr(0) )
+			brightness = x
+			send_display("\x1F\x58%c" % chr(x-1) )
+
+
 def display_thread(x):
 	global scroll_line1,scroll_line2
 	global offset_line1,offset_line2
+	global screensaver
+	global idlemessage
+
 	offset_line1=0
 	offset_line2=0
 	while(True):
 		lock.acquire()
+
 		offset_line1 = display_handle_scroll(1,scroll_line1,offset_line1)
 		offset_line2 = display_handle_scroll(2,scroll_line2,offset_line2)
+
+		if (screensaver <= SCREENSAVER_OFF):
+			screensaver=screensaver+1
+
+		if ((screensaver >= SCREENSAVER_DIM) and (screensaver <= (SCREENSAVER_DIM+7))): #activate first stage of screensaver:
+			x = (8-( screensaver - SCREENSAVER_DIM))/2
+			display_cmd_dim(1+x)
+
+		if (screensaver == SCREENSAVER_TIMEOUT):
+			now = time.localtime()
+			send_display("\x0c\x1F\x54%c%c\x1f\x03" % (chr(now.tm_hour),chr(now.tm_min)));
+			if (scroll_line2):
+				scroll_line1=scroll_line2
+			else:
+				scroll_line1=idlemessage
+			scroll_line2=None
+			offset_line1=0
+			offset_line2=0				
+		
+		if (screensaver == SCREENSAVER_OFF):
+			display_cmd_dim(0)
+			
 		lock.release()
 		time.sleep(.5)
 
@@ -110,8 +168,13 @@ def send_display(s):
 def display_screen(title,message):
 	global scroll_line1,scroll_line2
 	global offset_line1,offset_line2
+	global screensaver
+
 	offset_line1=0
 	offset_line2=0
+	screensaver=0
+	display_cmd_dim(5)
+
 	if (len(title)<21):
 		scroll_line1=None
 		send_display("\x1f\x24\x01%c\x18%s" % (chr(1),'\xdb'*20) )
@@ -123,22 +186,22 @@ def display_screen(title,message):
 	else:
 		display_scroll_text(1,title)
 
-	if (len(message)<21):
-		scroll_line2=None
-		send_display("\x1f\x24%c%c\x18%s" % (chr(1),chr(2),message) )
-	else:
-		display_scroll_text(2,message)
+	display_scroll_text(2,message)
 
 
 #Front-End function to send data to the display.
 def print_display(s):
 	global scroll_line1,scroll_line2
 	global offset_line1,offset_line2
+	global screensaver
+
 	lock.acquire()
+	screensaver=0
 	offset_line1=0
 	offset_line2=0
 	scroll_line1=None
 	scroll_line2=None
+	display_cmd_dim(5)
 	send_display(s)
 	lock.release()
 
@@ -208,6 +271,7 @@ class Status:
 		self.transfers = None
 
 	def dump(self):
+
 		def sign(amount, plus='+'):
 			return '-' if amount < 0 else plus
 
@@ -443,12 +507,14 @@ def print_prompt():
 
 
 def handle(line, status):
+	global idlemessage
 	if line == 'exit':
 		clear()
-		print_display("\x1b\x40exit...")
+		print_display("\x0c")
 		sys.exit(0)
 
 	if status.logged_in():
+		idlemessage=" Comitten nicht vergessen! ***"
 		if line in CODES:
 			call = CODES[line]
 			method = call[0]
@@ -467,6 +533,7 @@ def handle(line, status):
 			else:
 				status.buy(item)
 	else:
+		idlemessage="Mir ist langweilig!"
 		try:
 			status.login(line)
 		except urllib2.HTTPError as e:
@@ -488,7 +555,7 @@ def main():
 	colorama.init()
 	status = Status()
 	global scroll_line1,scroll_line2
-	print_display("\x1b\x40Kassensystem \n startet...")
+	print_display("\x1b\x40\x1f\x43\x00")
 	start_new_thread(display_thread,(1,))
 
 	#display_scroll_text(1,"Line1: Text, dumm scrollend!")
diff --git a/display-daemon/ser.c b/display-daemon/ser.c
index 287f4e4..d01ab45 100644
--- a/display-daemon/ser.c
+++ b/display-daemon/ser.c
@@ -301,7 +301,7 @@ main (int argc, char **argv)
 
   //TODO: arg parser!
   fifo = strdup ("/tmp/display");
-  pausemsg = strdup("Bitte scanne Deine ID-Karte um Dich anzumelden *** "); 
+  pausemsg = NULL ; //strdup("Bitte scanne Deine ID-Karte um Dich anzumelden *** "); 
 
  if (argc != 2)
     {