Unable to fully remove border of PyQt QGraphicsView

问题

I have tried calling self.setStyleSheet("background: transparent; border: transparent;") on a QGraphicsView, but it still leaves a 1 pixel border on the top edge. I have also tried replacing border: transparent; with border-style: none;, but it didn't work either.

Here is a screenshot of the problem:

What command will fully remove the border from the QGraphicsView?

回答1:

You can use one of the following css rule:

graphicsView.setStyleSheet("border-width: 0px; border-style: solid")

or

graphicsView.setStyleSheet("border: 0px")

Your border should disappear.

import sys
from PyQt4.QtGui import *

class Ui(QWidget):

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)

        graphicsView = QGraphicsView()
        graphicsView.setStyleSheet("border: 0px")

        grid = QGridLayout()
        grid.addWidget(graphicsView)

        self.setLayout(grid)

app = QApplication(sys.argv)
ui = Ui()
ui.show()
sys.exit(app.exec_())

Here is the widget with the default style:

And now the widget with the style applied:

回答2:

If the QGraphicsView is the top level window, try:

self.setContentsMargins(QMargins())

If not, you call the same function on every layouts and widgets (the function is defined in both classes) between the QGraphicsView and the top level window.

PS: QMargins() is part of QtCore, and when its constructor is called without any parameters, the four margins are set to 0.

来源：https://stackoverflow.com/questions/7325911/unable-to-fully-remove-border-of-pyqt-qgraphicsview