QLabel setpalette not working in cellWidget

[Kutyus]

Hi!

I want to set the background color of QLabel in the QTableWidget cell using the QLabel setPalette method, nothing happens, what could be the reason?

label = new QLabel(this);
label->setAutoFillBackground(true);
p = label->palette();
p.setColor(QPalette::Window, Qt::red);
p.setColor(QPalette::WindowText, Qt::red);
label->setPalette(p);
setCellWidget(0, 1, label);

Thanks in advance.

[SGaist]

Hi,

Please write your question in English as it is the main language of the forum.

Or use the Hungarian sub-forum if you want to stay in your native language.

[Kutyus]

@SGaist Sorry, my mistake, I inserted a bad clipboard.

[SGaist]

Why are you using a QLabel as cell widget ?

[Kutyus]

@SGaist
I monitor bluetooth LE devices with qtablewidget. Would I put the device icon in the cell and the background would be green or red, depending on whether it is connected?

[mrjj]

@Kutyus
Hi
but TableWidget already supports other colors for the background ?

So cant you just use that ?

Or did i miss something ? :)

You do it via the items.

QBrush brush1(QColor(0, 255, 127, 255));
brush1.setStyle(Qt::SolidPattern);
QTableWidgetItem *item = new QTableWidgetItem(); ( or take existing )
item->setBackground(brush1);

[Kutyus]

@mrjj
The Tablewidgetitem setbackground works, but I don't have a tablewidgetitem, I have a cellwidget, I can't color the background.

[Christian Ehrlicher]

@Kutyus said in QLabel setpalette not working in cellWidget:

Would I put the device icon in the cell and the background would be green or red, depending on whether it is connected?

Don't use a cell widget but simply use what QTableWidgetItem has - it's enough for your use case (text, an icon and setting the (background) color)

[mrjj]

@Kutyus
But do you need that cell widget ?
I mean the item can have icon and color but maybe you also show
other stuff not easy to make with item alone ?

[Kutyus]

@mrjj said in QLabel setpalette not working in cellWidget:

But do you need that cell widget ?
I mean the item can have icon and color but maybe you also show
other stuff not easy to make with item alone ?

I tried this solution because I couldn't find how to center the icon.

[mrjj]

@Kutyus
Hi
Ok, well centering the icon is not supported out of the box
and you would need to use a Delegate for that with custom painting.
https://forum.qt.io/topic/83265/centering-decorationrole-icon-in-qtableview-cell/9

Anyway, if the palette is not working you can use a stylesheet to set labels color.

[Kutyus]

@mrjj
Thanks for the tip, and with this we managed to solve it:
https://stackoverflow.com/questions/32216568/how-to-set-icon-center-in-qtableview