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[英]PySide PyQt MainWindow or Central Widget access from deeply nested widgets
[英]PyQT: How to access MainWindow widgets from an external function?
例如,單擊主窗口中的按鈕將調用test()函數以向主窗口中的textEdit框添加一些文本
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'felch1.ui'
#
# Created: Fri Aug 15 15:19:31 2014
# by: PyQt4 UI code generator 4.10.4
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
def test():
MainWindow.textEdit.append('button pushed')
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(30, 20, 131, 31))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.textEdit = QtGui.QTextEdit(self.centralwidget)
self.textEdit.setGeometry(QtCore.QRect(30, 80, 341, 441))
self.textEdit.setObjectName(_fromUtf8("textEdit"))
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 25))
self.menubar.setObjectName(_fromUtf8("menubar"))
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(MainWindow)
self.statusbar.setObjectName(_fromUtf8("statusbar"))
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), test)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.pushButton.setText(_translate("MainWindow", "test", None))
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_())
我知道我不應該與生成的文件打交道,只是試圖找出如何從該類之外的函數中引用主窗口對象。
我認為最簡單的方法是將test
作為Ui_MainWindow
的實例方法,並將MainWindow
對象也保存為Ui_MainWindow
的實例變量。
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(800, 600)
self.main_window = MainWindow
# blah blah
self.textEdit = QtGui.QTextEdit(self)
self.pushButton = QtGui.QPushButton(self)
self.pushButton.clicked.connect(self.test)
def test(self):
self.main_window.textEdit.append('button pushed')
如果您確實希望test
成為頂級功能,則還可以使用functools.partial
在執行test
回調時傳遞MainWindow
對象:
from functools import partial
def test(MainWindow):
MainWindow.textEdit.append('button pushed')
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(800, 600)
# blah blah
self.textEdit = QtGui.QTextEdit(self)
self.pushButton = QtGui.QPushButton(self)
test_func = partial(test, MainWindow) # Calling test_func(arg) actually calls test(MainWindow, arg)
self.pushButton.clicked.connect(test_func)
可能是將對象QtGui.QMainWindow
傳遞給您想要的方法,通過使用partial
傳遞您想要的參數將MainWindow對象傳遞給test()
;
from PyQt4 import QtCore, QtGui
from functools import partial
.
.
.
def test(MainWindow):
MainWindow.textEdit.append('button pushed')
def setupUi(self, MainWindow):
.
.
.
MainWindow.textEdit = QtGui.QTextEdit(self.centralwidget) # Pass to QMainWindows not self
MainWindow.textEdit.setGeometry(QtCore.QRect(30, 80, 341, 441))
MainWindow.textEdit.setObjectName(_fromUtf8("textEdit"))
MainWindow.setCentralWidget(self.centralwidget)
.
.
.
self.retranslateUi(MainWindow)
QtCore.QObject.connect(MainWindow.pushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), partial(test, MainWindow))
QtCore.QMetaObject.connectSlotsByName(MainWindow)
.
.
.
問候,
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