PYQT5画线 [英] PYQT5 drawing line
本文介绍了PYQT5画线的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
def __init__(self):
super().__init__()
self.title = 'Main menu'
self.left = 80
self.top = 80
self.width = 1500
self.height = 1000
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
painter = QPainter(self)
painter.setBrush(Qt.black)
painter.setPen(QPen(Qt.black, 2, Qt.SolidLine))
painter.drawLine(200,200,400,400)
self.show()
我试图画一条直线,但它什么也没画.我怎样才能画出来?
I am trying to draw a straight line but It is not drawing nothing. How can I draw it?
推荐答案
void QWidget::paintEvent(QPaintEvent *event)
void QWidget::paintEvent(QPaintEvent *event)
可以在子类中重新实现此事件处理程序,以接收在事件中传递的绘制事件.
This event handler can be reimplemented in a subclass to receive paint events passed in event.
import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
class Widget(QWidget):
def __init__(self):
super().__init__()
def paintEvent(self, event):
painter = QPainter(self)
painter.setPen(Qt.red)
painter.drawLine(10,10,100,140)
painter.setPen(Qt.blue)
painter.drawRect(120,10,80,80)
rectf = QRectF(230.0,10.0,80.0,80.0)
painter.drawRoundedRect(rectf,20,20)
p1 = [QPoint(10,100),QPoint(220,110),QPoint(220,190)]
painter.drawPolyline(QPolygon(p1))
p2 = [QPoint(120,110),QPoint(220,110),QPoint(220,190)]
painter.drawPolygon(QPolygon(p2))
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Widget()
ex.resize(400, 280)
ex.show()
sys.exit(app.exec_())
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