[英]My QPainter neither draws the lines nor throws an error, how can I fix this?
基本上我試圖在我的無框窗口周圍畫一個邊框。 它的大小是 550 和 407。我創建我的 QPainter 然后我的線條,最后我試圖繪制它們。
def draw_border(self):
painter = QPainter()
painter.begin(self)
pen = QPen(QColor(255, 1, 1))
painter.setPen(pen)
left = QLine(0, 0, 0, 407)
bottom = QLine(0, 407, 550, 407)
right = QLine(550, 407, 550, 0)
painter.drawLine(left)
painter.drawLine(bottom)
painter.drawLine(right)
painter.end()
我希望有三行:左、右和底部,但沒有任何反應。
我不知道錯誤在哪里,因為您沒有提供 MCVE,所以我只會提出我的解決方案,即重用小部件的 rect() 以便線條適應窗口的大小:
from PySide2 import QtGui, QtCore, QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
self.setWindowFlags(self.windowFlags() | QtCore.Qt.FramelessWindowHint)
def paintEvent(self, event):
painter = QtGui.QPainter(self)
pen = QtGui.QPen(QtGui.QColor(255, 1, 1))
painter.setPen(pen)
width = pen.width()
rect = self.rect().adjusted(0, -width, -width, -width)
painter.drawRect(rect)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.resize(550, 407)
w.show()
sys.exit(app.exec_())
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.