when using InstallEventFilter(),QLineEdit is invisible!

hi,guys!
now i meet a problem that when i use installEventFilter() function to a QLineEdit like "lineEdit->installEventFilter(this);"
if i run my program the QLineEdit is invisible! i never meet this situation before!who can give me some advice!thanks!
the code as follows:

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->lineEdit->installEventFilter(this);
}

show your eventFilter() function

EDIT:- oh.. u attached it. let me see.

if this condition is false

Code:

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if (event->type() == QEvent::KeyPress)

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then your function does not return anything. may be this is the issue.

Quote:

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Originally Posted by MrDeath

if this condition is false

Code:

---

if (event->type() == QEvent::KeyPress)

---

then your function does not return anything. may be this is the issue.

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Thanks~that's the reason~:)