how to get lineEdit content which is created dynamically?

[aurora]

In my program i'm creating lineEdit widget dynamically whenever a user enters "ADD" button.
But i'm not able to access the text of that dynamically created lineEdit.
my code is as follows...

on_pushButton_ADD_clicked()
{
QLineEdit *lineEdit = new QLineEdit;
    QLabel *label = new QLabel;
  ui->gridLayout->addWidget( label,LayoutCount,0 );
    ui->gridLayout->addWidget( lineEdit,LayoutCount,1 );
.................
}

on_pushButton_ADD_clicked()
{
QLineEdit *lineEdit = new QLineEdit;
    QLabel *label = new QLabel;
  ui->gridLayout->addWidget( label,LayoutCount,0 );
    ui->gridLayout->addWidget( lineEdit,LayoutCount,1 );
.................
}

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for accessing the dynamically created lineEdit i'm trying as follows..

KeyList.append(ui->gridLayout->lineEdit->text());

KeyList.append(ui->gridLayout->lineEdit->text());

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But i'm getting error....
Please help me.!!!!!!

[FelixB]

you get an error because "gridlayout" has no member "lineEdit". See the documentation of QGridLayout, it has a method "widgetAt(int x, int y)" - or something like that. It returns a QWidget which must be casted to QLineEdit.

Pseudocode:

for(unsigned int y=0; y<MAX; y++)
  if(QLineEdit* edit = qobject_cast<QLineEdit*>(ui->gridlayout->widgetAt(layoutCount,y)))
    // do something with the lineEdit

for(unsigned int y=0; y<MAX; y++)
  if(QLineEdit* edit = qobject_cast<QLineEdit*>(ui->gridlayout->widgetAt(layoutCount,y)))
    // do something with the lineEdit

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hth,
Felix

[aurora]

you get an error because "gridlayout" has no member "lineEdit". See the documentation of QGridLayout, it has a method "widgetAt(int x, int y)" - or something like that. It returns a QWidget which must be casted to QLineEdit.

Pseudocode:

for(unsigned int y=0; y<MAX; y++)
  if(QLineEdit* edit = qobject_cast<QLineEdit*>(ui->gridlayout->widgetAt(layoutCount,y)))
    // do something with the lineEdit

for(unsigned int y=0; y<MAX; y++)
  if(QLineEdit* edit = qobject_cast<QLineEdit*>(ui->gridlayout->widgetAt(layoutCount,y)))
    // do something with the lineEdit

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hth,
Felix

SORRY....that does not work....there is a method called " ItemAtPosition(int x, int y)", it returns a layout item...but i'm not able to get the lineEdit....which is at that position....so getting error...

[FelixB]

OMG, have a look at the docs of QLayoutItem.

QLayoutItem has a member "QWidget* widget()". What do you think could this method do?

[nish]

rather than playing with the layout i suggest you to keep track of your lineEdits in a QList or a QStack. As soon as you add a new lineEdit, insert the pointer into the list and then you can access the lineEdits anywhere.

[aurora]

rather than playing with the layout i suggest you to keep track of your lineEdits in a QList or a QStack. As soon as you add a new lineEdit, insert the pointer into the list and then you can access the lineEdits anywhere.

i tried to do like this.....

QList<QWidget *> lineEditList;
 QLineEdit *lineEdit = new QLineEdit;
 
    lineEditList.append(lineEdit);
//doing remaining operation....

QList<QWidget *> lineEditList;
 QLineEdit *lineEdit = new QLineEdit;

    lineEditList.append(lineEdit);
//doing remaining operation....

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wnd while accessing list ...

QString temp=lineEditList.at(i)->text();

QString temp=lineEditList.at(i)->text();

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but this does not works....i'm getting error..

[FelixB]

but this does not works....i'm getting error..

what error do you get? somethings wrong with my crystal ball...

[aurora]

what error do you get? somethings wrong with my crystal ball...

ERROR:'class QWidget' has no member named 'text'!

[FelixB]

of course not. have a second look at my example in the second post. maybe you'll find something that might solve your problem...

[nish]

if you are storing only LineEdits then why not use QList<QLineEdit*> ?? And read about dynamic_cast or qobject_cast.

[aurora]

ya...thank u...QList<QLineEdit *> lineEditList
worked for me....
But now i'm also using combobox with that.....
so i declared like this,

QList<QComboBox *> TagList;

QList<QComboBox *> TagList;

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but getting error saying that "'ComboBox' was not declared in this scope"!!!!

[nish]

then store only QWidgets, and do a qobject_cast and see if the object is lineEdit or combobox

[FelixB]

but getting error saying that "'ComboBox' was not declared in this scope"!!!!

I assume you mean "'QComboBox'...".

do you include the header of QComboBox?