| wps2000 |
2016-10-15 00:04 |
解决第4章“信号和槽”中的例子"connections"对PyQt5+python3兼容性的问题
先上原来的代码：
===================================================================
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
if sys.version_info[:2] < (2, 5):
def partial(func, arg):
def callme():
return func(arg)
return callme
else:
from functools import partial
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
button1 = QPushButton("One")
button2 = QPushButton("Two")
button3 = QPushButton("Three")
button4 = QPushButton("Four")
button5 = QPushButton("Five")
self.label = QLabel("Click a button...")
layout = QHBoxLayout()
layout.addWidget(button1)
layout.addWidget(button2)
layout.addWidget(button3)
layout.addWidget(button4)
layout.addWidget(button5)
layout.addStretch()
layout.addWidget(self.label)
self.setLayout(layout)
self.connect(button1, SIGNAL("clicked()"), self.one)
self.button2callback = partial(self.anyButton, "Two")
self.connect(button2, SIGNAL("clicked()"),
self.button2callback)
self.button3callback = lambda who="Three": self.anyButton(who)
self.connect(button3, SIGNAL("clicked()"),
self.button3callback)
self.connect(button4, SIGNAL("clicked()"), self.clicked)
self.connect(button5, SIGNAL("clicked()"), self.clicked)
self.setWindowTitle("Connections")
def one(self):
self.label.setText("You clicked button 'One'")
def anyButton(self, who):
self.label.setText("You clicked button '%s'" % who)
def clicked(self):
button = self.sender()
if button is None or not isinstance(button, QPushButton):
return
self.label.setText("You clicked button '%s'" % button.text())
app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()
============================================================
再上改后的代码：
===============================================================
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
if sys.version_info[:2] < (2, 5):
def partial(func, arg):
def callme():
return func(arg)
return callme
else:
from functools import partial
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
button1 = QPushButton("One")
button2 = QPushButton("Two")
button3 = QPushButton("Three")
button4 = QPushButton("Four")
button5 = QPushButton("Five")
self.label = QLabel("Click a button...")
layout = QHBoxLayout()
layout.addWidget(button1)
layout.addWidget(button2)
layout.addWidget(button3)
layout.addWidget(button4)
layout.addWidget(button5)
layout.addStretch()
layout.addWidget(self.label)
self.setLayout(layout)
button1.clicked.connect(self.one)
self.button2callback = partial(self.anyButton, "Two")
button2.clicked.connect(self.button2callback)
self.button3callback = lambda :self.anyButton("Three")
button3.clicked.connect(self.button3callback)
button4.clicked.connect(self.clicked)
button5.clicked.connect(self.clicked)
self.setWindowTitle("Connections")
def one(self):
self.label.setText("You clicked button 'One'")
def anyButton(self, who):
self.label.setText("You clicked button '%s'" % who)
def clicked(self):
button = self.sender()
if button is None or not isinstance(button, QPushButton):
return
self.label.setText("You clicked button '%s'" % button.text())
app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()
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