enlighten me on the use of Q_PROPERTY!!

[nupul]

Actually you will still need to write such methods. Q_PROPERTY just informs Qt about them.

how does this help? i mean how is it different from declaring a private attribute and corresponding methods..Any advantage?

[jacek]

Any advantage?

Look at the Qt Designer --- it doesn't know anything about custom widgets, yet if you create a custom widget plugin, you will be able to change that widgets' properties. How would you implement this without Q_PROPERTY?