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Duy Khang

How can I change stylesheet of a line edit when I click into itself or how can i get mouse event . Thanks!

mrjj

Hi

You have to create a custom class that inherits QLineedit and
then you override
https://doc.qt.io/qt-5/qwidget.html#mousePressEvent

Depending on what you want its might also be possible to some degree with stylesheet but
that more for hover events. (holding mouse over the lineedit)

class MyLineEdit : public QLineEdit
{
    Q_OBJECT
public:
    explicit MyLineEdit(QWidget *parent = nullptr)
        : QLineEdit(parent) {}
protected:
    void mousePressEvent(QMouseEvent *event) override
    {
        QLineEdit::mousePressEvent(event); // call the base to allow normal operation too
        setStyleSheet(xxx);
    }

};

You could also use an eventfiler to catch events.
https://doc.qt.io/qt-5/eventsandfilters.html

Then you dont need the subclass but its get a bit messy if you have many LineEdits etc and its not as self-contained as the subclass.

Duy Khang

@mrjj for an example, I have many lineEdit object: lineEditname, lineEditage, lineEditaddress, lineEditPhoneNumber and I want when click one of them, it will change styleSheet of its. How can I do it?

JonB

@Duy-Khang
So if you want to do that make all your line edits be @mrjj's MyLineEdit, then the code he shows there will apply to all of them

Duy Khang

@JonB thank you