System border color

[folibis]

Now I work on custom widget and I want to draw some element on it. Shortly, it looks like button.
But I don't wont to use hardcoded color instead I want to draw it with system colors.
I looked in documentation but did'nt found it.
So how can I get system palette, or rather border color, like border color of QLineEdit?

[spirit]

For obtaining "system" palette use QApplication::palette. Also, take a look at QStyle, because this one is responsible for rendering widgets.

[folibis]

Yes, I know about QApplication:alette and also about QStyle. But i dind'nt found a way to obtain system color for borders

[spirit]

Did you check how a button is rendered in QStyle?
I guess you need QPalette::shadow.
See, QWindowsStyle

...
case PE_FrameDefaultButton: {
        QPen oldPen = p->pen();
        p->setPen(opt->palette.shadow().color());
        QRect rect = opt->rect;
        rect.adjust(0, 0, -1, -1);
        p->drawRect(rect);
        p->setPen(oldPen);
        break;
    }
...

...
case PE_FrameDefaultButton: {
        QPen oldPen = p->pen();
        p->setPen(opt->palette.shadow().color());
        QRect rect = opt->rect;
        rect.adjust(0, 0, -1, -1);
        p->drawRect(rect);
        p->setPen(oldPen);
        break;
    }
...

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[RokeJulianLockhart]

Did you check how a button is rendered in QStyle?
I guess you need QPalette::shadow.
See, QWindowsStyle

Does this differ per QStyle, like https://discuss.kde.org/t/what-colou...julianlockhart alludes to? I ask because

PyQt6.QtGui.QPen().setColor(PyQt6.QtGui.QColor(PyQt6.QtWidgets.QApplication.palette().color(PyQt6.QtGui.QPalette.ColorRole.Accent)))

PyQt6.QtGui.QPen().setColor(PyQt6.QtGui.QColor(PyQt6.QtWidgets.QApplication.palette().color(PyQt6.QtGui.QPalette.ColorRole.Accent)))

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gives me #000000 with

plasma-breeze-qt6-6.3.5-1.fc42

plasma-breeze-qt6-6.3.5-1.fc42

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