key handling and handling event??

[bakidilek]

I want to learn more key handling without using event_callback.I have already checked keys_example.py and ex_use_of_keys_descr.py in mobilenin.com but I didn't understand anything. examples are too complex for me.can anybody explain key handling in a simplest way please?




thanks

[bogdan.galiceanu]

The easiest way to handle key events is using the keycapture module. I suggest you read about it in the PyS60 Library Reference. Basically you just define functions that are called when a specific key is pressed.

Here is an example:

import keycapture, appuifw, e32


def cb_capture(key):
	if(key==keycapture.EKeyLeftSoftkey):
		print "Left softkey pressed"
	elif(key==keycapture.EKeyRightSoftkey):
		print "Right softkey pressed"
		capturer.stop()
		app_lock.signal()

capturer=keycapture.KeyCapturer(cb_capture)
capturer.keys=([keycapture.EKeyLeftSoftkey, keycapture.EKeyRightSoftkey])

capturer.start()

app_lock=e32.Ao_lock()
app_lock.wait()

[gaba88]

hello bakidilek

just to add a bit in bogdans post you can also have a look at this article if it helps you.

Enjoy Pythoning
Gaba88

[bakidilek]

thanks for your replies.I know the keycapture module, keycapture module can handle keys even the app is running in background but I dont want to handle key when the app is running in background.and I know the canvas.bind method but I dont want to use canvas handling hethod too.I want to understand this code: http://www.mobilenin.com/pys60/resou...use_of_keys.py

can you explain it please?

thanks again and soryy about my English

[igordsm]

That code uses the Canvas method to get events. It simply created a Keyboard class that has a dictionary with the scancode of pressed keys. Then it assigned the method handle_event of a keyboard instance to the Canvas event_callback argument and made a app loop that shows a note if the desired key is pressed.

Is it clear?