Automatic resizing of child widgets

[JovianGhost]

Hi all,

First time poster here. Decided to give Qt a shot, after getting fed up with wxWidgets' absolutely horrid GUI designer and clunky macros.

I've installed Qt 4.6.2 and Qt Creator on my Windows box, and I've been experimenting with the GUI editor. It's fantastic! But I've run into a situation.
I've got my QMainWindow and I need a treeview and an MDI client widget. So first thing I tried to do was add a QHBoxLayout, and successfully added a QTreeView and QMdiArea into it (this is all in the WYSIWYG editor.)

That's fine, but I'd like the QHBoxLayout to completely fill up the client area of the window, and resize automatically as the parent window gets resized. I looked through the properties and tried a few, but couldn't find anything relevant. Is there a way to do this automatically, or do I have to intercept the parent window's resize event, and manually resize my layout box?

I then tried adding a QDockWidget and putting the QTreeView into it. But again the QTreeView doesn't fill its parent. Can I do this automatically, or is this the same story as before?

[aamer4yu]

Does your main window has a layout ? What did you add the QHBoxLayout to ?

[ChrisW67]

In Designer select the main window and look for the layout tools on the toolbar. You should be able to dispense with your explicitly added QHBoxLayout and rely on the layout Designer attaches to the main window client area.

[JovianGhost]

Does your main window has a layout ? What did you add the QHBoxLayout to ?

I added the QHBoxLayout directly to the window, as the central widget.

In Designer select the main window and look for the layout tools on the toolbar. You should be able to dispense with your explicitly added QHBoxLayout and rely on the layout Designer attaches to the main window client area.

I see that toolbar, but every one of the layout buttons are greyed out!
If I right-click the window and choose "Lay out", the only item that's available is "Adjust size".

[edit]
Ok nevermind, I figured out what I was doing wrong-- first I have to add the widgets THEN choose the layout. Dammit I'm an idiot.

Thanks guys!