How to enabled button, when i changed lineedit`s text ?

[newermind]

First, My save button is disabled. And I have 10 qlineedits.

I try to enabled button, when i changed a lineedit`s text.

I did this;

connect( m_ui->line_edit_1, SIGNAL( textChanged(const QString &) ), this, SLOT( BUTON_IS_ENABLED ( ) ) );

Do I write this code, all lineedits connect ?

Can i do this, if change something in dialog, button is enabled ?

[yogeshgokul]

connect( m_ui->line_edit_1, SIGNAL( textChanged(const QString &) ), this, SLOT( BUTON_IS_ENABLED ( ) ) );

What is

BUTON_IS_ENABLED

Is this a slot of what?

[newermind]

BUTON_IS_ENABLED is my function.


BUTON_IS_ENABLED ( )
{
m_ui->save_button->setEnabled(true);
}

[wagmare]

BUTON_IS_ENABLED ( )

this should be a private slot like
void make_button_enable();

inside make_button_enable()
set button->setEnabled(true);

Do I write this code, all lineedits connect ?

yes u have to ... to truncate lines u can use QList<QLineEdit *> but it is very tedious for simple connect ()

[newermind]

In this dialog change anything, these are lineedits, textedits or combo box.

For i make button enabled, Do i have to control all widgets ?

[yogeshgokul]

In this dialog change anything, these are lineedits, textedits or combo box.
For i make button enabled, Do i have to control all widgets ?

It seems like, you want to enable buttons, for any keyboard event. So instead of controlling all widgets, use event filter. Look for QKeyEvent. In this event, enable all your buttons.

[aamer4yu]

Do I write this code, all lineedits connect ?

Yes.. connect( m_ui->line_edit_1, SIGNAL( textChanged(const QString &) ), this, SLOT( BUTON_IS_ENABLED ( ) ) ); is connectting only line_edit_1 to the slot..
U will need to connect all line edits to ur slot..

also make sure ur function is declared as a SLOT - private/public slots:

[XpycT]

Try this:
Change your slot from BUTON_IS_ENABLED ( ) to BUTON_IS_ENABLED ( const QString &text).
Then use

connect( m_ui->line_edit_1, SIGNAL( textChanged(const QString &) ), this, SLOT( BUTON_IS_ENABLED ( const QString &) ) );

connect( m_ui->line_edit_1, SIGNAL( textChanged(const QString &) ), this, SLOT( BUTON_IS_ENABLED ( const QString &) ) );

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and chane your slot to

BUTON_IS_ENABLED (  const QString &text )
{
m_ui->save_button->setEnabled(!text.isEmpty());
}

BUTON_IS_ENABLED (  const QString &text )
{
m_ui->save_button->setEnabled(!text.isEmpty());
}

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[aamer4yu]

That wont matter since you can have slot with less number of arguments than the signal !