Creating rounded QPushButton

[kiteh]

I am trying to create a rounded QPushButton in pythonic format.

Read some solutions which are in C++ and while trying to convert them in Python terms, it does not seems to be working.

btn = QtGui.QPushButton()

btn.setAttribute(QtCore.Qt.WA_TranslucentBackground)

btn.setStyleSheet(

    "border: 1px solid black;"

    "border-radius: 150px;"

    "color: lightGray; "

    "font-size: 35px;"

)

There are indeed some changes effected on the button but I am still seeing sharp edges (squarish).

Wondering if anyone has attempt this?

P.S - If possible, I would not want to create a class just for the sake of creating a circular button

[Justin Israel]

The 'border-radius' value is going to be relative to the size of the button, so if you set it too high (as you do in this example), it ends up just drawing a square. You will notice that if you resize the button in different dimensions it can end up drawing rounded corners. But overall I would say using 'border-radius' is not going to be a good way to achieve a completely circular button. I can think of a number of different ways to accomplish this goal:

1. Custom QAbstractButton class with a paintEvent that draws a circle
2. A QPushbutton with a stylesheet using "border-image: url("/path/to/image.png") 0 0 0 0 stretch stretch;", although this looks kind of awful with the aliasing on the drawing
3. Flat QPushButton with an icon that has a pre-made circle graphic

I can give an example of option 3:

# This could either be a file on disk,

# or a :/resource/file.png

# or you could use QPixmap and QPainter to draw the graphic dynamically

ico = QtGui.QIcon("/path/to/circle.png")

btn = QtGui.QPushButton()

btn.setIcon(btn)

btn.setFixedSize(64, 64)

btn.setIconSize(btn.size())

btn.setFlat(True)

btn.setStyleSheet("""

    border: 0;

    color: lightGray;

    font-size: 35px;

""")

This will give you a button that has an icon set to the same size as the fixed size. Icons won't automatically scale unless you create a sub-class, so you have to go with just a fixed button size.

Justin

 

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[kiteh]

Got it, thanks!