[英]How to create new PyQt4 windows from an existing window?
我一直在嘗試使用python3和Qt4從現有窗口調用一個新窗口。
我使用Qt Designer(主應用程序和另一個)創建了兩個窗口,我將Qt Designer生成的.ui文件轉換為.py腳本 - 但我似乎無法從主應用程序創建新窗口。
我試過這樣做:
############### MAIN APPLICATION SCRIPT ################
from PyQt4 import QtCore, QtGui
import v2
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName(_fromUtf8("Form"))
Form.resize(194, 101)
self.button1 = QtGui.QPushButton(Form)
self.button1.setGeometry(QtCore.QRect(50, 30, 99, 23))
self.button1.setObjectName(_fromUtf8("button1"))
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
Form.setWindowTitle(QtGui.QApplication.translate("Form", "Form", None, QtGui.QApplication.UnicodeUTF8))
self.button1.setText(QtGui.QApplication.translate("Form", "Ventana", None, QtGui.QApplication.UnicodeUTF8))
self.button1.connect(self.button1, QtCore.SIGNAL(_fromUtf8("clicked()")), self.mbutton1)
def mbutton1(self):
v2.main()
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
Form = QtGui.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())
################## SECOND WINDOW #######################
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName(_fromUtf8("Form"))
Form.resize(400, 300)
self.label = QtGui.QLabel(Form)
self.label.setGeometry(QtCore.QRect(160, 40, 57, 14))
self.label.setObjectName(_fromUtf8("label"))
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
Form.setWindowTitle(QtGui.QApplication.translate("Form", "Form", None, QtGui.QApplication.UnicodeUTF8))
self.label.setText(QtGui.QApplication.translate("Form", "LABEL 2", None, QtGui.QApplication.UnicodeUTF8))
def main():
import sys
app = QtGui.QApplication(sys.argv)
Form = QtGui.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())
但我收到此錯誤消息:
QCoreApplication::exec: The event loop is already running
QPixmap: Must construct a QApplication before a QPaintDevice
盡管pyuic
可以使用-x, --execute
選項創建可執行腳本,但它主要用於測試。
的主要目的pyuic
是創建Qt的Desgner 靜態 Python模塊ui
文件,讓你所包含GUI類導入應用程序。
假設您已經使用Qt Designer創建了兩個ui
文件,並將它們命名為v1.ui
和v2.ui
然后,您將創建兩個python模塊,如下所示:
pyuic4 -o v1.py v1.ui
pyuic4 -o v2.py v2.ui
接下來,您將編寫一個單獨的main.py
腳本,該腳本從模塊中導入GUI類,並根據需要創建它們的實例。
所以你的main.py
看起來像這樣:
from PyQt4 import QtGui
from v1 import Ui_Form1
from v2 import Ui_Form2
class Form1(QtGui.QWidget, Ui_Form1):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.setupUi(self)
self.button1.clicked.connect(self.handleButton)
self.window2 = None
def handleButton(self):
if self.window2 is None:
self.window2 = Form2(self)
self.window2.show()
class Form2(QtGui.QWidget, Ui_Form2):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.setupUi(self)
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
window = Form1()
window.show()
sys.exit(app.exec_())
請注意,我稍微更改了GUI類的名稱以避免命名空間沖突。 為了讓GUI類更好的名字,剛剛設置的objectName
中的Qt Desgner頂級類的屬性。 在你做出改變之后別忘了重新運行pyuic
!
您只能創建一個QApplication
。 創建后,您可以創建所需的窗口數。
例如:
from PyQt4 import QtGui, QtCore
class MyWindow(QtGui.QDialog): # any super class is okay
def __init__(self, parent=None):
super(MyWindow, self).__init__(parent)
self.button = QtGui.QPushButton('Press')
layout = QtGui.QHBoxLayout()
layout.addWidget(self.button)
self.setLayout(layout)
self.button.clicked.connect(self.create_child)
def create_child(self):
# here put the code that creates the new window and shows it.
child = MyWindow(self)
child.show()
if __name__ == '__main__':
# QApplication created only here.
app = QtGui.QApplication([])
window = MyWindow()
window.show()
app.exec_()
每次單擊該按鈕都會創建一個新窗口。
您可以調整上面的示例以使用您使用Designer創建的窗口。
在旁注:
永遠不要編輯pyuic的結果。 不應更改這些文件。 這意味着:不要將mbutton1
方法添加到Ui_Form
。
如果你有文件mywindow_ui.py
,是由pyuic創建,然后創建該文件mywindow.py
,並把這樣的事情:
from PyQt4 import QtCore, QtGui
from mywindow_ui import Ui_MyWindow
class MyWindow(QtGui.QWidget, Ui_MyWindow): #or whatever Q*class it is
def __init__(self, parent=None):
super(MyWindow, self).__init__(parent)
self.setupUi(self)
def create_child(self): #here should go your mbutton1
# stuff
#etc.
現在從你的主文件main.py
你做到:
from PyQt4 import QtGui
from mywindow import MyWindow
# ...
if __name__ == '__main__':
app = QtGui.QApplication([])
window = MyWindow()
window.show()
app.exec_()
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