How to use the exec statement

[JB]

Alex Martelli wrote:

> If you explain what
> you're trying to do with exec, it's possible that better
> suggestions can be advanced regarding how to perform that.

Thx. I am playing with a very simple application using PyQt.

The main window has a single central widget which is a 
QSplitter. The QSplitter consists of two parts. One is a 
QTextEdit and the other is simply a QWidget. The user can 
enter text in (or into?) the QTextEdit. At the moment the 
text consists of Python statements, like a = ... or 
dosomething(x,y,z,...). Then, when a toolbar button is 
pressed, the statements should be executed by exec and then 
something is done in the other window.

I thought that the definition of the QMainWindow and the 
QSplitter widget (that is the definition of my derived 
classes) should be in the main module and the definition of 
the other classes in one or several other windows.

Probably, I shall have to call a function in the main 
module, when the execution has to start and this function 
will then call another function in the second module. This 
second function will call exec.
Is this sensible?

(off topic remark: I was stunned when I found out that in Qt 
setting the world matrix of a painter will not influece the 
way straight lines are drawn via drawLine (the arguments of 
drawLine are always integers). This is not very nice and I 
consider it a shortcoming of a brillant tool kit.)


-- 
Janos Blazi


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