[Interest] QTextEdit is too slow - hints needed

[JM]

Hi all,

I am using QTextEdit to display log text files, just like the Unix command tail 
-f. 
My current implementation just displays the last 5 lines and then follows the 
growing
log file, displaying lines as they come.
Now, I am asked to make QTextEdit display the whole file when the user opens a 
file.
A log file can be very large. I tested it with a 2mbyte file, and inserting 
data to QTextEdit
caused the GUI to freeze for almost 1 minute.
This is not acceptable, and I am looking for a solution. I have the following 
questions:

-) what is the fastest way to insert lots of text into QTextEdit?
-) should I go to the route of implementing my own QTextDisplay? If so, 
should I use QAbstractScrollArea as class base? Any pointer to how to use it?

Thanks in advance,
JM
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[Interest] Best Practices returning data from a dialog

[JM]

Hi all,

What are the best practices to return from a common dialog window?
At the moment I have already solved with a Slot connected to the closure of the 
dialog,
that invokes methods to retreive data. But what are the best practices?
What are the pros and cons of every solution?

TIA, 
JM


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