Expose custom parameters to QSS

[b2soft]

Hi. I have custom widget, like CustomWidget : public QWidget

I have QTreeView inside in this CustomWidget (as a part of my custom widget), QTreeView's item delegate invokes data() method, where I return one of 2 colors: black for regular text, and red color, if there is an error.

Question is, how can I expose such colors to QSS in some way?
like CustomWidget::default { color: black; } and CustomWidget::error { color: red; }?

...
else if (role == Qt::TextColorRole)
{
	QColor color(Qt::red); //this will produce red text in my widget's tree items
	if (item->GetParent()->GetType() == TreeItem::k_typeGroup)
		color = Qt::blue;

	bool visible = IsVisible();
        QColor c = visible ? Qt::gray : Qt::lightGray;

	return color;
}

Thanks in advance

[raven-worx]

@b2soft
create 2 QColor properties for your custom widget. Then in your model retun those properties and use this QSS:

CustomWidget {
     qproperty-default: "#FFFFFF";
    qproperty-error: "red";
}

[b2soft]

@raven-worx ,
I create Q_PROPERTY for such colors in this way:

class BrowserModel : public QAbstractItemModel
{
Q_OBJECT

public:
Q_PROPERTY( QColor textColor MEMBER m_textColor );
QColor m_textColor{ Qt::black };
...
}

Note, that BrowserModel is a member of BrowserWnd QDockWidget, but such strings have no effect:

BrowserModel
{
	qproperty-textColor: #ff0000;
}

[raven-worx]

@b2soft
as in my example: pass the value as string or rgb(255, 0, 0)

[b2soft]

@raven-worx
Did not help. I have no idea why. Assume ,that code is kinda similar to this question's code: https://stackoverflow.com/questions/30170922/how-can-i-get-the-background-color-returned-by-model-take-precedence-over-the-st

I have a custom widget. That contains QTreeView and for this QTreeView BrowserModel is set.
I want to customize BrowserModel ::data() returning colors using QSS

[raven-worx]

@b2soft said in Expose custom parameters to QSS:
in order to make something like this to work:

BrowserModel
{
qproperty-textColor: #ff0000;
}

you need to specify Q_OBJECT in your custom class. At least in the code snippet you've posted this is not the case.

[b2soft]

@raven-worx edited, sorry (actual class is pretty big, missed the Q_OBJECT in the topic)

[JonB]

@b2soft

I want to customize BrowserModel ::data() returning colors using QSS

@raven-worx knows much more than I, but I don't get this. role == Qt::TextColorRole will want to return a QBrush (http://doc.qt.io/qt-5/qt.html#ItemDataRole-enum). How is that linked to returning a string to use for a name in a stylesheet? :confused: