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:

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.