Interaction between dialog boxes and main window
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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 AdvanceZain
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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
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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
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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().
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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.
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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.
