[Qt-interest] adressing something to the mainWindow from a dialog

[Malyushytsky, Alex]

Please take into the count that correctly asked question is at least half of a right answer. And I afraid I might not understand it right.


So asssume you have vaiable 'var' in your MainWindow class.

class MainWindow
{
...........
 int var;
...........
}

Remember that variable 'var' makes sence only withing MainWindow object.
Even you have only one object, you should have allocate it somewhere, probably like this:

MainWindow* mainWindow = new ........;

So first thing you need is a pointer to your mainWindow object.
How you get it, depends on the code, here I would assume that you can access it, by storing the pointer in a global variable. (I don't recommend this way, it is just chosen for simplicity).


Once you have an access to a pointer to MainWindow object in your module (a dialog window):

 - if var variable is public, you can get and set it directly, like mainWindow->var = 3; int mainWindow->var = 4;
 - if it is protected or private, you can either add public methods (functions) to MainWindow which will return or set value of val, etc.


Now I hope this helps.
But I would ask you to remember that QT interest forum is not a place for basic C++ questions.
The reason is that most of people read and post here in their free time.
And they don't like to dig through non-qt related questions all the time, because they were currently interested in specific product, even they were willing to help you.
There are special forums for C++ beginners. Try to find one. You might find much more help there too.

Best regards,
              Alex


________________________________________
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Giancarlo Amati
Sent: Monday, April 06, 2009 9:17 AM
To: qt-interest at trolltech.com
Subject: [Qt-interest] adressing something to the mainWindow from a dialog

Hello everybody,

i have this problem, I have a dialog windows from where I want to adress a variable which beloges to may MainWindow class linked to the main application. Is there a way to do it?

Kind regards.
Giancarlo
________________________________________
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