How to stop multiple appearance of a widget

[jpn]

We are creating the instance of the findbox in the application even before clicking it. Now for any reason if we donot click the button , doesn't that cause memory wastage?

Since you don't supply any parent for the widget, it doesn't get destroyed automatically. So you will have to delete it in the descructor.
A widget without a parent is always an independent window.. But why don't you just use a modeless dialog? Then you could pass your window as a parent, the dialog would show up centered to your window, and it would get automatically deleted..

[wysota]

hello Sir,
I have posted this thread long back but I couldnot get proper solution.

In that FAQ, it was written that "Assuming you have two form classes: Form1 and Form2 and that Form1 has a pushbutton "button" child and Form2 is derived from QDialog" .

But in my application, the find box which I want to show is not derived from QDialog. It is a widget to which many child widgets are added.

It's all the same for QWidget, you just have to pass 0 as the parent (meaning you'll get a memory leak if you don't free that memory yourself later). Why don't you use a QDialog subclass anyway?