Getting parent dialog variable value in child dialog

[subrat17june]

I have a parent dialog. and i am launching a child dialog from within the parent dialog. code below

// inside parent dialog
QString pValue;
ChildDialog = new ChildDialog(this);
ChildDialog->exex();


// inside child dialog
QString cValue = need to get the value of pValue declared in parent dialog.

i want to pass the value of a QString value from the parent dialog to child dialog..
how can i access the QString value in my ChildDialog???
how can i pass/ access the value from the parent dialog ??

Thanks.

[Lykurg]

You can define a setter-method or pass pValue as an argument to the constructor of the child dialog.

[subrat17june]

well i have done so...

but getting some errors.

// in header
class ChildDialog : public QDialog
{
Q_OBJETC
public: QString path;
explicit ChildDialog(const QString value, QWidget *parent = 0) : QDialog(parent), path(value){}
~ChildDialog();
}

//in cpp file
ChildDialg::ChildDialog(QWidget *parent) : QDialog(parent), ui(new Ui::ChildDialog)
{ ui->SetupUi(this);
}

Showing error, prototype for ChildDialog::ChildDialog(QWidget*) does not match any in class ChildIDialog

where have i written wrong??

[ChrisW67]

where have i written wrong??

You forgot your [code][/code] tags.
You retyped rather than copy-and-pasted your code. I will try to ignore the obvious syntax errors.

This:

explicit ChildDialog(const QString value, QWidget *parent = 0) : QDialog(parent), path(value) {}

explicit ChildDialog(const QString value, QWidget *parent = 0) : QDialog(parent), path(value) {}

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gives a declaration and (empty) definition of a constructor requiring one or two arguments.

This tries to define a constructor that is not declared anywhere:

ChildDialg::ChildDialog(QWidget *parent) : QDialog(parent), ui(new Ui::ChildDialog)
{ 
}

ChildDialg::ChildDialog(QWidget *parent) : QDialog(parent), ui(new Ui::ChildDialog)
{ 
}

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giving you the self descriptive error:

Prototype for ChildDialog::ChildDialog(QWidget*) does not match any in class ChildIDialog

Prototype for ChildDialog::ChildDialog(QWidget*) does not match any in class ChildIDialog

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[subrat17june]

changed it now..

//in header file

public:
    QString fPath
    explicit ChildDialog(const QString value, QWidget *parent = 0) ;

public:
    QString fPath
    explicit ChildDialog(const QString value, QWidget *parent = 0) ;

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ChildDialg::ChildDialog(QString value,QWidget *parent) : QDialog(parent),fPath(value) ui(new Ui::ChildDialog)
    {
    }

ChildDialg::ChildDialog(QString value,QWidget *parent) : QDialog(parent),fPath(value) ui(new Ui::ChildDialog)
    {
    }

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now i am getting the error
multiple definition of ChildDialog::ChildDialog(QString,QWidget*)
using the statements below to launch the ChildDialog in my maindialog

QString pValue;
ChildDialog = new ChildDialog(pValue,this);
ChildDialog->exex();

QString pValue;
ChildDialog = new ChildDialog(pValue,this);
ChildDialog->exex();

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what went wrong here?

[Lykurg]

https://qt-project.org/forums/viewthread/28580/

Well, it is not polite to waste peoples time. How about only ask at one place and wait for answers? This way several people waste time on writing similar answers. I'm out.

[subrat17june]

Really sorry for that...
needed a quick answer so had posted in both the forums