我正在使用PyQt5,我想根据用户对现有按钮的单击来绘制文本。
文本直接显示在Qwidget上,我希望在单击按钮后立即显示文本。怎么做?
我的代码是这样的:
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.text = "Just For Test"
self.setGeometry(300, 300, 280, 170)
self.setWindowTitle('Drawing text')
self.btn1 = QPushButton("Button 1", self)
self.btn1.move(10, 10)
self.show()
def paintEvent(self,event):
qp = QPainter()
qp.begin(self)
self.drawText(event, qp)
qp.end()
def drawText(self, event, qp):
qp.setPen(QColor(168, 34, 3))
qp.setFont(QFont('Decorative', 10))
qp.drawText(event.rect(), Qt.AlignCenter, self.text)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
首先,将文本设置为空:
self.text = ""
然后,创建按钮单击事件很重要:
self.btn1 = QPushButton("Button 1", self)
self.btn1.clicked.connect(self.button_click)
单击按钮创建要调用的函数:
def button_click(self):
self.text = "Just For Test"
self.repaint()
重新绘制将刷新您的QPaint