showMessage() clearMessage()

-- coding: utf-8 --

'''
【简介】
PyQt5中 QStatusBar 例子

'''

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class StatusDemo(QMainWindow):
def init(self, parent=None):
super(StatusDemo, self).init(parent)
bar = self.menuBar()
file = bar.addMenu("File")
file.addAction("show")
file.triggered[QAction].connect(self.processTrigger)
self.setCentralWidget(QTextEdit())
self.statusBar = QStatusBar()
self.setWindowTitle("QStatusBar 例子")
self.setStatusBar(self.statusBar)

def processTrigger(self, q):
    if (q.text() == "show"):
        self.statusBar.showMessage(q.text() + " 菜单选项被点击了", 5000)

if name == 'main':
app = QApplication(sys.argv)
demo = StatusDemo()
demo.show()
sys.exit(app.exec_())