getting data from a Dialog

[graciano]

Hi
I'm using public member-functions to get data from a called Dialog.

#ifndef A_H
#define A_H
 
#include <QtGui/QDialog>
 
namespace Ui {
    class a;
}
 
class a : public QDialog {
    Q_OBJECT
public:
    a(QWidget *parent = 0);
    ~a();
    QString getA();
protected:
    void changeEvent(QEvent *e);
private:
    Ui::a *m_ui;
};
 
#endif // A_H

#ifndef A_H
#define A_H

#include <QtGui/QDialog>

namespace Ui {
    class a;
}

class a : public QDialog {
    Q_OBJECT
public:
    a(QWidget *parent = 0);
    ~a();
    QString getA();
protected:
    void changeEvent(QEvent *e);
private:
    Ui::a *m_ui;
};

#endif // A_H

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Calling the Dialog ...

void Dialog::calla()
{
    a x;
    x.exec();
    ui->a_lineEdit->setText(x.getA());
}

void Dialog::calla()
{
    a x;
    x.exec();
    ui->a_lineEdit->setText(x.getA());
}

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Could someone point me other ways to do this!

Thanks

[franz]

I think you have chosen the best way to obtain data from a class; by using a getter function.

However, since you seem to want to synchronize the text in two widgets, you can consider connecting a textChanged() signal from your dialog to the lineEdit's setText() slot. In your case that wouldn't really reduce your code, though.

[graciano]

And if i want this working the opposite direction?
Let's say i want that objects created from class a get some data from de base class.
This is a constructor issue ... isn'it?

#include "a.h"
#include "ui_a.h"
 
a::a(QWidget *parent) :
    QDialog(parent),
    m_ui(new Ui::a)
{
    m_ui->setupUi(this);
    m_ui->label.setText("data from the calling dialog!?!");
}

#include "a.h"
#include "ui_a.h"

a::a(QWidget *parent) :
    QDialog(parent),
    m_ui(new Ui::a)
{
    m_ui->setupUi(this);
    m_ui->label.setText("data from the calling dialog!?!");
}

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[Lykurg]

read about setter and getter functions. In your case it would be like:

class a : public QDialog {
    Q_OBJECT
public:
  //...
  void setSomeThing(QString str);
 
};
 
void a::setSomeThing(QString str)
{
  // if needed check the content of str
  ui->someLineEdit->setText(str);
}

class a : public QDialog {
    Q_OBJECT
public:
  //...
  void setSomeThing(QString str);

};

void a::setSomeThing(QString str)
{
  // if needed check the content of str
  ui->someLineEdit->setText(str);
}

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[graciano]

yess ... but the content of that str is somewhere in other Dialog that called this one.
Am i missing something obvious?

[Lykurg]

Am i missing something obvious?

Yes ;-)

void Dialog::calla()
{
    a x;
    x.setSomeThing("foo bar");
    x.exec();
    ui->a_lineEdit->setText(x.getA());
}

void Dialog::calla()
{
    a x;
    x.setSomeThing("foo bar");
    x.exec();
    ui->a_lineEdit->setText(x.getA());
}

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[graciano]

Wellll ... guess i need vacations.
"I'll be back "