CallBack function in C Libraries.

[fiensproto]

Hello. I want to use a c library. It is a complete graphic widget set.

Here code working. But i have problem with the callback function. The callback is executed while ClikOnForm is executed but i get a error message (see after code )
____________________________________________________________________

file fpgui-test.py

from ctypes import*

def TheProc(c_int): fpgui.fpgFormWindowTitle(0, 'Boum')
return 0

CMPFUNC = CFUNCTYPE(c_int)

TheProcF = CMPFUNC(TheProc)

fpgui = cdll.LoadLibrary("fpgui-32.dll")

fpgui.fpgInitialize() fpgui.fpgSetStyle('Demo Style') fpgui.fpgFormCreate(0, -1) fpgui.fpgFormSetPosition(0, 300,100,400,200) fpgui.fpgFormWindowTitle(0, 'Hello world!')

fpgui.fpgFormOnClick(0,TheProcF)

fpgui.fpgButtonCreate(0,0,-1) ; fpgui.fpgButtonSetPosition(0,0, 15, 10 , 150 , 40) fpgui.fpgButtonSetText(0,0, 'BUTTON1')

fpgui.fpgButtonCreate(0,1,-1) ; fpgui.fpgButtonSetPosition(0,1, 15, 70 , 150, 40) fpgui.fpgButtonSetText(0,1, 'Clickme')

fpgui.fpgFormShow(0) fpgui.fpgRun()

Here the error message if i click on form :

Traceback (most recent call last): File "_ctypes/callbacks.c", line 314, in 'calling callback function' TypeError: TheProc() takes exactly 1 argument (0 given)

What is wrong ?

Many thanks.

 

[Mark H Harris]

def TheProc(c_int): fpgui.fpgFormWindowTitle(0, 'Boum')
return 0

TheProcF = CMPFUNC(TheProc)

Traceback (most recent call last): File "_ctypes/callbacks.c",
line 314, in 'calling callback function' TypeError: TheProc() takes
exactly 1 argument (0 given)

What is wrong ?

You defined TheProc(c_init) to take exactly 1 argument.

But when you called it, you didn't provide the argument.

So, you got a traceback indicating that TheProc() takes exactly one
argument.

Give the function call its required argument and the error will go
away... well, at least that one.


Cheers

 

[fiensproto]

Give the function call its required argument and the error will go

away... well, at least that one.

Yep, many thanks for the answer.
But... im totally beginner with Python.
I develop in Pascal and C and want to understand the basics of Python.

In concrete, what must i change in the code ?

Many thanks.

 

[88888 Dihedral]

Yep, many thanks for the answer.

But... im totally beginner with Python.

I develop in Pascal and C and want to understand the basics of Python.



In concrete, what must i change in the code ?



Many thanks.

Python is a dynamical typed functional
language with OOP supports in the
revisons, and well suited in the
giga-byte dram capacity
personal toy era that can relplace
her mother lisp's unrealized AI
project .