From: Bernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Date: Sun, 27 Jun 2004 18:19:11 +0000 (+0000)
Subject: A usable UI.
X-Git-Url: https://git.ucc.asn.au/?p=zanchey%2Fdispense2.git;a=commitdiff_plain;h=49b70d20b2aad8be178f1002460947cc81228277

A usable UI.
---

diff --git a/sql-edition/servers/HorizScroll.py b/sql-edition/servers/HorizScroll.py
new file mode 100644
index 0000000..69644fb
--- /dev/null
+++ b/sql-edition/servers/HorizScroll.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+import string
+import sys
+import time
+
+class HorizScroll:
+	def __init__(self, text):
+		self.text = text
+		pass
+
+	def expand(self, padding=None, paddingchar=" ", dir=None, wraparound=False):
+		if len(self.text) <= 10:
+			return [text]
+
+		if not padding:
+			padding = len(self.text) / 2 + 1
+
+		format = "%-" + str(padding) + "." + str(padding) + "s"
+		pad = string.replace(format % " "," ",paddingchar)
+		padtext = self.text + pad
+		if wraparound:
+			numiters = len(self.text) - 1
+		else:
+			numiters = len(padtext)
+
+		expansion = []
+
+		for x in range(0,numiters):
+			  expansion.append("%-10.10s" % (padtext[x:] + padtext[:x]))
+		
+		if dir == -1:
+			expansion.reverse()
+
+		return expansion
+
+if __name__ == '__main__':
+	h = HorizScroll("hello cruel world")
+	eh = h.expand()
+	while 1:
+		for x in eh:
+			sys.stdout.write("\r")
+			print "%-10.10s" % x,
+			sys.stdout.flush()
+			time.sleep(0.1)
+
diff --git a/sql-edition/servers/VendServer.py b/sql-edition/servers/VendServer.py
index 09bfe66..c48d2bc 100755
--- a/sql-edition/servers/VendServer.py
+++ b/sql-edition/servers/VendServer.py
@@ -8,6 +8,7 @@ from popen2 import popen2
 from LATClient import LATClient
 from VendingMachine import VendingMachine
 from ConfigParser import ConfigParser
+from HorizScroll import HorizScroll
 
 GREETING = 'UCC SNACKS'
 PIN_LENGTH = 4
@@ -46,6 +47,26 @@ class DispenseDatabase:
 			self.process_requests()
 			notify = self.db.getnotify()
 
+def scroll_options(username, mk, welcome = False):
+	if welcome:
+		msg = [(center('WELCOME'), False, 0.8),
+			   (center(username), False, 0.8)]
+	else:
+		msg = []
+	choices = ' '*10+'CHOICES: '
+	coke_machine = file('/home/other/coke/coke_contents')
+	cokes = coke_machine.readlines()
+	for c in cokes:
+		c = c.strip()
+		(slot_num, price, slot_name) = c.split(' ', 2)
+		if slot_name == 'dead': continue
+		choices += '%s8-%s (%sc) '%(slot_num, slot_name, price)
+	choices += '55-DOOR '
+	choices += 'OR A SNACK. '
+	choices += '99 TO READ AGAIN.'
+	msg.append((choices, False, None))
+	mk.set_messages(msg)
+
 def get_pin(uid):
 	try:
 		info = pwd.getpwuid(uid)
@@ -98,6 +119,8 @@ def center(str):
 
 class MessageKeeper:
 	def __init__(self, vendie):
+		# Each element of scrolling_message should be a 3-tuple of
+		# ('message', True/False if it is to be repeated, time to display)
 		self.scrolling_message = []
 		self.v = vendie
 		self.next_update = None
@@ -114,6 +137,18 @@ class MessageKeeper:
 		if not forced and self.next_update != None and time() < self.next_update:
 			return
 		if len(self.scrolling_message) > 0:
+			if len(self.scrolling_message[0][0]) > 10:
+				(m, r, t) = self.scrolling_message[0]
+				a = []
+				exp = HorizScroll(m).expand(padding = 10)
+				if t == None:
+					t = 0.1
+				else:
+					t = t / len(exp)
+				for x in exp:
+					a.append((x, r, t))
+				del self.scrolling_message[0]
+				self.scrolling_message = a + self.scrolling_message
 			newmsg = self.scrolling_message[0]
 			if newmsg[2] != None:
 				self.next_update = time() + newmsg[2]
@@ -124,6 +159,9 @@ class MessageKeeper:
 				self.scrolling_message.append(self.scrolling_message[0])
 			del self.scrolling_message[0]
 
+	def done(self):
+		return len(self.scrolling_message) == 0
+
 if __name__ == '__main__':
 	cp = ConfigParser()
 	cp.read('/etc/dispense/servers.conf')
@@ -163,7 +201,7 @@ if __name__ == '__main__':
 
 		if logout_timeout != None:
 			time_left = logout_timeout - time()
-			if time_left < 10 and last_timeout_refresh > time_left:
+			if time_left < 10 and (last_timeout_refresh > time_left or last_timeout_refresh is None):
 				mk.set_message('LOGOUT: '+str(int(time_left)))
 				last_timeout_refresh = int(time_left)
 
@@ -174,6 +212,11 @@ if __name__ == '__main__':
 			cur_selection = ''
 			mk.set_message(GREETING)
 
+		if logout_timeout and not mk.done(): logout_timeout = None
+		if cur_user and cur_pin and mk.done() and logout_timeout == None:
+			# start autologout
+			logout_timeout = time() + 10
+
 		mk.update_display()
 
 		e = v.next_event(0)
@@ -232,13 +275,7 @@ if __name__ == '__main__':
 					if username:
 						v.beep(0, False)
 						cur_selection = ''
-
-						msg = [(center('WELCOME'), False, 0.8),
-							   (center(username), False, 0.9)]
-						msg.append(('CHOICES :', True, 1))
-						msg.append(('55 - DOOR', True, 1))
-						msg.append(('OR A SNACK', True, 1))
-						mk.set_messages(msg)
+						scroll_options(username, mk, True)
 						continue
 					else:
 						v.beep(40, False)
@@ -263,7 +300,7 @@ if __name__ == '__main__':
 			elif len(cur_selection) == 1:
 				if key == 11:
 					cur_selection = ''
-					mk.set_message('SELECT: ')
+					scroll_options(username, mk)
 					continue
 				else:
 					cur_selection += chr(key + ord('0'))
@@ -272,6 +309,10 @@ if __name__ == '__main__':
 					if cur_selection == '55':
 						v.display('GOT DOOR?')
 						os.system('su - "%s" -c "dispense door"'%username)
+					elif cur_selection == '99':
+						scroll_options(username, mk)
+						cur_selection = ''
+						continue
 					elif cur_selection[1] == '8':
 						v.display('GOT COKE?')
 						os.system('su - "%s" -c "dispense %s"'%(username, cur_selection[0]))