stretching and anchoring of a widget

nitzan

In my centralWidget I want to have a widget that is anchored to the top left and is stretching along with the main window (/centralWidget).

I can't seem to find how to do that inside the QT Creator design view.
Do I have to do that programmatically?

(using QT Creator 3.4.3 with QT 5.5.0 under linux)

Thanks.

mcosta

Hi,

usually you can do this using layouts.
Can you post a sketch of what you want achieve??

nitzan

The thing is that in the Qt Creator design view there's no way to set anchors or stretching with the layout, as far as I managed to find.

Here's an image of what I want to have:
scatch

The green part is the widget, as you can see even when the window get bigger the widget still fills the width of the parent.

I hope that makes it clear.
Thanks.

David.G

The green widget should be set to preferred (expand width) and fixed (fixed height) with minimum/maximum values.

Have you tried

// after ui setup
ui->centralWidget->layout()->setAlignment(Qt::AlignTop);

on your centralWidget's Layout? More on flags, here.

I hope that helps

nitzan

The problem is that the green widget isn't resizing when the window is and so its width stays fixed, even though the sizePolicy for it is:

horizontal policy: preferred
vertical policy: fixed
horizontal stretch: 1
vertical stretch: 0

I haven't used the Qt::AlignTop as the widget stays aligned to top as it is, that's not an issue, only the width is the problem.
I just want it to fill the parent.

Thanks.

mcosta

Hi,

I suggest to use Expanding as Horizontal Policy

nitzan

@mcosta that seems to have no effect on things.
the same result as before.