Interaction between dialog boxes and main window

[Zain]

Hello All,

Please help me to get interaction(passing some values) between dialog-dialog and dialog-main window.
It would be very helpful if you provide some code or links for similar examples.

Any suggestion appreciated.
Thanks in Advance

Zain

[AcerExtensa]

It is not really clear what you mean, some code will be helpful. In any way the answer will be: use signal/slot connection to communicate between objects... Here is video tutorial: "C++ Qt 04 - Signals and Slots":http://www.youtube.com/watch?v=JtyCM4BTbYo

[Zain]

Thanks for the reply,

I am trying to make it more clear:

• I am trying to create some dialogs, which will return some value to the another dialog (which exec() or show the first dialog )when we close these.

I have tried to write the close event , but don't know how a dialog returns a value to its parent.

I want to have a three level dialog calling system .(mainWindow -> dialog -> subDialog).
And the values will be returned in a manner like.(subDialog -> dialog -> mainWindow).

Please help me for this.

Any suggestion appreciated.

Thanks and Regards

Zain

[tilsitt]

Like AcerExtensa told you: use signals and slots.

In your case, you could emit a signal from subDialog in closeEvent, which will be connected to dialog and then from dialog to mainWindow.

Another way could be to use a defined value with QDialog::done().

[vittalonline]

if you want passing arguments.. this example illustrates pass a int value as an argument in
signal/slot mechanism.

in header file

Q_PROPERTY(int curState READ curState NOTIFY changeState)

public:
int curState();

signals:
void changeState(int);

---

in CPP

int ClassName::curState() // write a get method in cpp
{
return crstate;
}

Now you can use signal/slot mechanism whatever you want either
interaction(passing some values) between dialog-dialog and dialog-main window
or other.

[vittalonline]

in the above code
emit a signal "changeState" from Dialogbox in closeEvent, which will be pass value from dialog to dialog or from dialog to mainWindow.