[giogiogio]

how could i have a countdown in my app?
i would have a countdown in my app,and show it in the screen(over an image)??there is a function?or how i could?

THK

[desijatt]

I am assuming you are using javaME. If thats he case, you could display it on the screen using either a Form or Canvas. You would have to read the api for that.

[giogiogio]

I am assuming you are using javaME

what is it??

[lfd]

Hi giogiogio,

You can use the canvas object for that. Check the doc (PythonForS60_doc_1_3_17.pdf) to understand how it works.

In your redraw_callback function you need to, first draw the image you want to by using the blit function . That would make it the " background " image. Then draw some text to display the countdown.

LFD

[giogiogio]

THK!!
but..........

In your redraw_callback function you need to, first draw the image you want to by using the blit function . That would make it the " background " image.

this i know...i know how to have a backgroud-image...

Then draw some text to display the countdown.

my problem is that!...how i could make a countdown??

[giogiogio]

in my app i need a countdown.when it is over i need to launch a soud....how?
THK

[jethro.fn]

You can use e32.Ao_timer() for creating a countdown. Module audio can be used to play a sound. Here's an example you can study:

#!/usr/bin/env python
# -*- coding: iso8859-1 -*-

# countdown.py - Counts down seconds from 100, then plays a sound
# by Jussi Ylänen
#
# v1.00 2007-02-03
# Initial version

import e32
import appuifw
import audio

# Load a sound file.
sound = audio.Sound.open("E:\\Sounds\\Digital\\explosion.wav")

# Create a timer and a callback function for it.
countervalue = 100
counter = e32.Ao_timer()
def counterhandler():
    global counter, countervalue, listbox, sound

    # Update counter value.
    countervalue -= 1
    listbox.set_list([u"%03d" % countervalue])

    # Comment out, if you don't want the light to stay on during countdown.
    e32.reset_inactivity()

    if countervalue > 0:
        # Re-schedule a new timer event.
        counter.after(1, counterhandler)
    else:
        # Counter reached 0, play sound and delete the timer object.
        e32.ao_yield()  # Redraw before starting sound. Looks better that way.
        sound.play()
        counter = None

# Create a lock for exit handling. Normally the program just waits for the lock.
exitlock = e32.Ao_lock()
def exithandler():
    exitlock.signal()
appuifw.app.exit_key_handler = exithandler

# Add a single menu item: "Exit".
appuifw.app.menu = [(u"Exit", exithandler)]

# Create a listbox UI.
def selecthandler():
    # Do nothing on select.
    pass
listbox = appuifw.Listbox([u"%03d" % countervalue], selecthandler)
appuifw.app.body = listbox
e32.ao_yield()  # Force a screen redraw.

# Schedule an initial timer event after one second. From then on,
# the callback will re-schedule the timer once a second.
counter.after(1, counterhandler)

# Main loop: do nothing, except wait for program exit (set in exithandler()).
exitlock.wait()

# Stop and delete a running timer.
if counter:
    counter.cancel()
del counter

# Stop sound and delete the object.
sound.stop()
sound.close()
del sound

# Request a graceful program exit.
appuifw.app.set_exit()

This example runs a little slower than once a second, due to the way the timer object is re-scheduled. If you need accurate timekeeping, check the actual elapsed time in counterhandler() using time.time() or by any other means.

You need to provide your own sound ("E:\Sound\Digital\explosion.wav"). The example uses listbox UI because it is the simplest. You can of course use text or canvas UIs as well.