How to connect the signal valueChanged from QLineEdit to a custom slot in Qt
c++, qlineedit, qt, signals-slots
Solution
`QLineEdit` does not seem to have `valueChanged` signal, but `textChanged` (refer to the Qt documentation for complete list of supported signals). You need to change your `connect()` function call too. It should be:
connect(myLineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(customSlot()));
If you need the handle the new text value in your slot, you can define it as `customSlot(const QString &newValue)` instead, so your connection will look like:
connect(myLineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(customSlot(const QString &)));
Problem
I need to connect the valueChanged signal from QLineEdit to a custom slot programatically. I know how to do the connection by using Qt Designer and doing the connection with graphical interface but I would like to do it programmatically so I can learn more about the Signals and Slots. This is what I have that doesn't work. .cpp file ``` // constructor connect(myLineEdit, SIGNAL(valueChanged(static QString)), this, SLOT(customSlot())); void MainWindow::customSlot() { qDebug()<< "Calling Slot"; } ``` .h file ``` private slots: void customSlot(); ``` What am I missing here? Thanks