import sys
from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplication
from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit,
QInputDialog, QApplication)
import sys
from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter, QColor, QPen
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplication
count=0
class Example(QMainWindow):
global count
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
btn1 = QPushButton('箭头', self)
btn1.move(20, 20)
btn1.clicked.connect(self.paintEvent)
btn2 = QPushButton('FC', self)
btn2.move(20, 60)
btn2.clicked.connect(self.paintEvent)
btn3 = QPushButton('Bi-LSTM', self)
btn3.move(20, 100)
btn3.clicked.connect(self.paintEvent)
btn4 = QPushButton('hidden units', self)
btn4.move(20, 140)
btn4.clicked.connect(self.paintEvent)
btn5 = QPushButton('设置', self)
btn5.move(118, 60)
btn5.clicked.connect(self.showDialog)
btn6 = QPushButton('设置', self)
btn6.move(118, 100)
btn6.clicked.connect(self.showDialog)
btn7 = QPushButton('设置', self)
btn7.move(118, 140)
btn7.clicked.connect(self.showDialog)
self.statusBar()
self.setGeometry(300, 300, 290, 150)
self.setWindowTitle('Input dialog')
self.show()
def showDialog(self):
text, ok = QInputDialog.getText(self, 'Input Dialog',
'Enter row*column:')
if ok:
self.le.setText(str(text))
def paintEvent(self,e):
qp = QPainter()
qp.begin(self)
self.drawRe(qp,200,200,20,20)
qp.end()
def drawRe(self, qp,a,b,c,d):
pen = QPen(Qt.black, 2, Qt.SolidLine)
qp.setPen(pen)
qp.drawRect(a,b,c,d)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

怎么才能点击按钮绘制矩形

我这个没点击就绘制了

求大佬