Some problem of my app in emulator

[WayneHuang]

That is my code by python.I exec it in the emulator of Symbian 9.1 S60 3rd Edition.

this is the order of my commend.

start python shell
run my code
exit my code
exit python shell

and then the error message of "cone 8" show in the screen.

I couldn't find any error from the code below.

Wait for your help.

import appuifw
import graphics
import e32

class MyApp(object):
    def __init__(self):
        self.app_lock=e32.Ao_lock()
        appuifw.app.exit_key_handler=self.exit_key_handler

        appuifw.app.title=u'Hello World'
        appuifw.app.screen='full'
        appuifw.app.menu=[(u'normal',self.itema),
                          (u'large',self.itemb),
                          (u'full',self.itemc)]

        self.img=None
        self.canvas=appuifw.Canvas(redraw_callback=self.redraw)
        
        appuifw.app.body=self.canvas
        self.img=graphics.Image.new(self.canvas.size)
        self.img.clear(0x00ff00)
        appuifw.app.body.blit(self.img)

    def loop(self):
        self.app_lock.wait()
        return

    def exit_key_handler(self):
        self.app_lock.signal()
        return
    def redraw(self):
        
        return
    def itema(self):
        appuifw.app.screen='normal'
        return
    def itemb(self):
        appuifw.app.screen='large'
        return
    def itemc(self):
        appuifw.app.screen='full'

    
app=MyApp()
app.loop()

[JOM]

start python shell
run my code
exit my code
exit python shell

and then the error message of "cone 8" show in the screen.

    def loop(self):
        self.app_lock.wait()
        return
...
    def exit_key_handler(self):
        self.app_lock.signal()
        return
...    
app=MyApp()
app.loop()

Just a wild guess: you exit during app_lock.wait(). Manual says:

class Ao lock()

Creates an Ao lock instance. A Symbian active object based synchronization service. This can
be used in the main thread without blocking the handling of UI events. The application should
not exit while a thread is waiting in Ao lock. If Ao lock.wait is called while another wait call
is already in progress, an AssertionError is raised.

Cheers,

--jouni

[WayneHuang]

I don't agree with you.
If the code is below,there is no error in the screen.

Is the bug of PyS60 or my code?

P.S. It is O.K. to run the demo of PyS60 named "ball.py"

import e32

class MyApp(object):
    def __init__(self):
        self.app_lock=e32.Ao_lock()
        appuifw.app.exit_key_handler=self.exit_key_handler

        appuifw.app.title=u'Hello World'
        appuifw.app.screen='full'
        appuifw.app.menu=[(u'normal',self.itema),
                          (u'large',self.itemb),
                          (u'full',self.itemc)]

        self.img=None
        self.canvas=appuifw.Canvas()
        
        appuifw.app.body=self.canvas
        self.img=graphics.Image.new(self.canvas.size)
        self.img.clear(0x00ff00)
        appuifw.app.body.blit(self.img)

    def loop(self):
        self.app_lock.wait()
        return

    def exit_key_handler(self):
        self.app_lock.signal()
        return

    def itema(self):
        appuifw.app.screen='normal'
        return
    def itemb(self):
        appuifw.app.screen='large'
        return
    def itemc(self):
        appuifw.app.screen='full'

    
app=MyApp()
app.loop()

[shubhendra]

Hi WayneHuang,
Welcome to forum first of all.
See i am using emulator 8.0a/S60_2nd_FP2 with PyS60 Version 1.4.3 and your original script is working perfectly in my emulator.

import appuifw
import graphics
import e32

class MyApp(object):
    def __init__(self):
        self.app_lock=e32.Ao_lock()
        appuifw.app.exit_key_handler=self.exit_key_handler

        appuifw.app.title=u'Hello World'
        appuifw.app.screen='full'
        appuifw.app.menu=[(u'normal',self.itema),
                          (u'large',self.itemb),
                          (u'full',self.itemc)]

        self.img=None
        self.canvas=appuifw.Canvas(redraw_callback=self.redraw)
        
        appuifw.app.body=self.canvas
        self.img=graphics.Image.new(self.canvas.size)
        self.img.clear(0x00ff00)
        appuifw.app.body.blit(self.img)

    def loop(self):
        self.app_lock.wait()
        return

    def exit_key_handler(self):
        self.app_lock.signal()
        return
    def redraw(self):
        
        return
    def itema(self):
        appuifw.app.screen='normal'
        return
    def itemb(self):
        appuifw.app.screen='large'
        return
    def itemc(self):
        appuifw.app.screen='full'

    
app=MyApp()
app.loop()

Except one error i.e.

TypeError: redraw() takes exactly 1 argument (2 given)

[WayneHuang]

That is my mistake.
You could use "def redraw(self,rect)" instead of "def redraw(self)".

But the error is showing too. Have no idea about it.

I use Emulator of S60 3rd edition MR.
I don't know wheather it is the problem of emulator.

CONE 8. that is a good question. :-)

[JOM]

Hmph,

CONE 8 is resource leak, which means that python was not able to free all resource allocations at exit time. This happens occasionally, when the code is too complex. In such cases we have to help python...

    def exit_key_handler(self):
        del self.img
        del self.canvas
        self.app_lock.signal()
        return

Seems to work,

--jouni

[WayneHuang]

Thanks,JOM. It is O.K.

By the way, Shall we use 'del' to release all resource before we exit the PyS60?

[JOM]

By the way, Shall we use 'del' to release all resource before we exit the PyS60?

Python is supposed to do that by itself, but occasionally it won't.. so just in case you might want to release, close and delete everything you have reserved, opened and created.

Whether it's actually "del" or something else, depends on resource

Cheers,

--jouni