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Comments on Qt Button changes drastically when setting its `border-radius`.

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Qt Button changes drastically when setting its `border-radius`.

+7
−0

In a Qt application I have nothing more than a window with a button as its direct child.

I set its background color and all is fine:

Window::Window(QWidget *parent) : QWidget(parent)
{
    button1 = new QPushButton(this);
    button1->setText("1234");
    button1->setStyleSheet("*{background:plum;}");
}

Button

But if I also set its border-radius,

Window::Window(QWidget *parent) : QWidget(parent)
{
    button1 = new QPushButton(this);
    button1->setText("1234");
    button1->setStyleSheet("*{background:plum;border-radius:0;}");
}

the button becomes different in other aspects, namely the background is not a gradient anymore, the border is gone and it is much smaller.

Button after zeroing border-radius

All I expected was for its shape to become rectangular.

What am I missing?

I consulted the Qt stylesheet reference, but that only added to my confusion, since it states that if not specified border-radius is (already) zero.

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1 comment thread

Hint (1 comment)
Hint
Alexei‭ wrote almost 2 years ago

Never worked with Qt, but I am wondering if setStyleSheet sets the entire styling for the element instead of merging existing styling (maybe inherited from some global styling). Possible relevant discussion here which suggests that "The function to set a stylesheet explicitly is called setStylesheet... It sets the given style... previous styles (style changes) are lost."