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按钮的单键事件处理程序

2012-11-21 73 views
1

我想用一些按钮创建一个GUI应用程序，并希望以相同的方式处理按钮按下事件（即所有按键的单个事件句柄）。但我不明白button_hanlder怎样才能理解哪个按钮被按下。按钮的单键事件处理程序

这里是代码

from PyQt4 import QtCore, QtGui 

try: 
    _fromUtf8 = QtCore.QString.fromUtf8 
except AttributeError: 
    _fromUtf8 = lambda s: s 

class Ui_MainWindow(object): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName(_fromUtf8("MainWindow")) 
     MainWindow.resize(800, 600) 
     self.centralwidget = QtGui.QWidget(MainWindow) 
     self.centralwidget.setObjectName(_fromUtf8("centralwidget")) 
     self.pushButton = QtGui.QPushButton(self.centralwidget) 
     self.pushButton.setGeometry(QtCore.QRect(350, 190, 98, 27)) 
     self.pushButton.setObjectName(_fromUtf8("pushButton")) 
     self.pushButton_2 = QtGui.QPushButton(self.centralwidget) 
     self.pushButton_2.setGeometry(QtCore.QRect(240, 220, 98, 27)) 
     self.pushButton_2.setObjectName(_fromUtf8("pushButton_2")) 
     self.pushButton_3 = QtGui.QPushButton(self.centralwidget) 
     self.pushButton_3.setGeometry(QtCore.QRect(350, 250, 98, 27)) 
     self.pushButton_3.setObjectName(_fromUtf8("pushButton_3")) 
     self.pushButton_4 = QtGui.QPushButton(self.centralwidget) 
     self.pushButton_4.setGeometry(QtCore.QRect(460, 220, 98, 27)) 
     self.pushButton_4.setObjectName(_fromUtf8("pushButton_4")) 
     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtGui.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 25)) 
     self.menubar.setObjectName(_fromUtf8("menubar")) 
     self.menuFile = QtGui.QMenu(self.menubar) 
     self.menuFile.setObjectName(_fromUtf8("menuFile")) 
     MainWindow.setMenuBar(self.menubar) 
     self.statusbar = QtGui.QStatusBar(MainWindow) 
     self.statusbar.setObjectName(_fromUtf8("statusbar")) 
     MainWindow.setStatusBar(self.statusbar) 
     self.menubar.addAction(self.menuFile.menuAction()) 

     self.retranslateUi(MainWindow) 
     QtCore.QObject.connect(self.pushButton_2, QtCore.SIGNAL(_fromUtf8("pressed()")), self.button_handler) 
     QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("pressed()")), self.button_handler) 
     QtCore.QObject.connect(self.pushButton_4, QtCore.SIGNAL(_fromUtf8("pressed()")), self.button_handler) 
     QtCore.QObject.connect(self.pushButton_3, QtCore.SIGNAL(_fromUtf8("pressed()")), self.button_handler) 
     QtCore.QMetaObject.connectSlotsByName(MainWindow) 

    def retranslateUi(self, MainWindow): 
     MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8)) 
     self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Up", None, QtGui.QApplication.UnicodeUTF8)) 
     self.pushButton_2.setText(QtGui.QApplication.translate("MainWindow", "Right", None, QtGui.QApplication.UnicodeUTF8)) 
     self.pushButton_3.setText(QtGui.QApplication.translate("MainWindow", "Down", None, QtGui.QApplication.UnicodeUTF8)) 
     self.pushButton_4.setText(QtGui.QApplication.translate("MainWindow", "Left", None, QtGui.QApplication.UnicodeUTF8)) 
     self.menuFile.setTitle(QtGui.QApplication.translate("MainWindow", "File", None, QtGui.QApplication.UnicodeUTF8)) 

    def button_handler(self): 
     # Which button was pressed? 

if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv) 
    MainWindow = QtGui.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_())

我想在button_handler确定用按钮标题按下了哪个按钮，例如。

来源

2012-11-21 Mikhail Boiko

回答

1

的QButtonGroup是专为这一点。它将与任何类型的按钮，它继承QAbstractButton，如QPushButton，QRadioButton，QCheckBox等

只是所有的按钮使用addButton添加到按钮组，然后buttonClicked信号连接到处理工作。

注意：将所有按钮放在容器小部件中可能是一个好主意，例如QGroupBox,QFrame或仅仅是一个普通的QWidget。这将允许你遍历容器的孩子们，并自动所有的按钮添加到按钮组。

例如代码：

btngroup.py：

from PyQt4 import QtGui, QtCore 
from btngroup_ui import Ui_ButtonGroup 

class Window(QtGui.QWidget, Ui_ButtonGroup): 
    def __init__(self): 
     QtGui.QWidget.__init__(self) 
     self.setupUi(self) 
     self.buttonGroup = QtGui.QButtonGroup(self) 
     for button in self.buttonBox.findChildren(QtGui.QAbstractButton): 
      self.buttonGroup.addButton(button) 
     self.buttonGroup.buttonClicked.connect(self.handleButtonClicked) 

    def handleButtonClicked(self, button): 
     print('"%s" was clicked' % button.text()) 

if __name__ == '__main__': 

    import sys 
    app = QtGui.QApplication(sys.argv) 
    window = Window() 
    window.show() 
    sys.exit(app.exec_())

btngroup_ui.py：

# -*- coding: utf-8 -*- 

# Form implementation generated from reading ui file 'btngroup.ui' 
# 
# Created: Wed Nov 21 17:50:42 2012 
#  by: PyQt4 UI code generator 4.9.5 
# 
# WARNING! All changes made in this file will be lost! 

from PyQt4 import QtCore, QtGui 

try: 
    _fromUtf8 = QtCore.QString.fromUtf8 
except AttributeError: 
    _fromUtf8 = lambda s: s 

class Ui_ButtonGroup(object): 
    def setupUi(self, ButtonGroup): 
     ButtonGroup.setObjectName(_fromUtf8("ButtonGroup")) 
     ButtonGroup.resize(240, 167) 
     self.horizontalLayout = QtGui.QHBoxLayout(ButtonGroup) 
     self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout")) 
     self.buttonBox = QtGui.QWidget(ButtonGroup) 
     self.buttonBox.setObjectName(_fromUtf8("buttonBox")) 
     self.verticalLayout = QtGui.QVBoxLayout(self.buttonBox) 
     self.verticalLayout.setMargin(0) 
     self.verticalLayout.setObjectName(_fromUtf8("verticalLayout")) 
     self.buttonA = QtGui.QPushButton(self.buttonBox) 
     self.buttonA.setObjectName(_fromUtf8("buttonA")) 
     self.verticalLayout.addWidget(self.buttonA) 
     self.buttonB = QtGui.QPushButton(self.buttonBox) 
     self.buttonB.setObjectName(_fromUtf8("buttonB")) 
     self.verticalLayout.addWidget(self.buttonB) 
     self.buttonC = QtGui.QPushButton(self.buttonBox) 
     self.buttonC.setObjectName(_fromUtf8("buttonC")) 
     self.verticalLayout.addWidget(self.buttonC) 
     self.buttonD = QtGui.QPushButton(self.buttonBox) 
     self.buttonD.setObjectName(_fromUtf8("buttonD")) 
     self.verticalLayout.addWidget(self.buttonD) 
     self.horizontalLayout.addWidget(self.buttonBox) 

     self.retranslateUi(ButtonGroup) 
     QtCore.QMetaObject.connectSlotsByName(ButtonGroup) 

    def retranslateUi(self, ButtonGroup): 
     ButtonGroup.setWindowTitle(QtGui.QApplication.translate("ButtonGroup", "Button Group", None, QtGui.QApplication.UnicodeUTF8)) 
     self.buttonA.setText(QtGui.QApplication.translate("ButtonGroup", "Button A", None, QtGui.QApplication.UnicodeUTF8)) 
     self.buttonB.setText(QtGui.QApplication.translate("ButtonGroup", "Button B", None, QtGui.QApplication.UnicodeUTF8)) 
     self.buttonC.setText(QtGui.QApplication.translate("ButtonGroup", "Button C", None, QtGui.QApplication.UnicodeUTF8)) 
     self.buttonD.setText(QtGui.QApplication.translate("ButtonGroup", "Button D", None, QtGui.QApplication.UnicodeUTF8))

来源

2012-11-21 18:26:47 ekhumoro

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