auto resize widget when mainwindow is resized

[nomercy89]

Hi all. Using Qt designer, I drew my mainwindow and in a new file, my custom widget.. It's name is "Form" (of corse Form extend QWidget class). In my mainwindow i have a QWidget pattern, it's name is "widgetadd".. and in my mainwindow i have created by code my custom widget using:
Form * f = new Form(ui->widgetadd);

My FORM has a GridLayout and if i try to resize it in designer, all label and QLineEdit resizing.
The problem is when i run my project, when i resize mainwindow my widget doesnt't resize!
Could someone help me?

Result when i run my project:

[mrjj]

Hi
Did you insert the widget into the layout ?
You should add the (form) widget to widgetadd's layout.
something like
if (widgetadd->layout())
widgetadd->layout()->addWidget(f);