Opening another created gui pyqt

[aladagemre]

I'm sorry, I just pasted a code where I used Qt Designer and imported the resulting gui.py (pyuic4 gui.ui gui.py) file. So forget it if you don't use Qt Designer. If you use it, you might want to take a look at here (13.1 Using the Generated Code)

Here's a minimal example where all the stuff is done by code:

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
 
class OtherWindow(QMainWindow):
    def __init__(self):
	QMainWindow.__init__(self)
	layout = QHBoxLayout()
	lineEdit = QLineEdit()
	lineEdit.setText("Just to fill up the dialog")
	layout.addWidget(lineEdit)
 
	self.widget = QWidget()
        self.widget.setLayout(layout)
 
        self.setCentralWidget(self.widget)
	self.setWindowTitle("Win2")
 
class MainWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)        
	layout = QHBoxLayout()
	button = QPushButton()
        layout.addWidget(button)
 
        self.widget = QWidget()
        self.widget.setLayout(layout)
 
        self.setCentralWidget(self.widget)
        self.setWindowTitle("Win1")
 
        self.connect(button, SIGNAL('clicked()'), self.newWindow)
    def newWindow(self):
	self.myOtherWindow = OtherWindow()
	self.myOtherWindow.show()
 
if __name__ == "__main__":
 
    app = QApplication(sys.argv)
    mainWindow = MainWindow()   
    mainWindow.setGeometry(100, 100, 200, 200)
    mainWindow.show()
    sys.exit(app.exec_())

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class OtherWindow(QMainWindow):
    def __init__(self):
	QMainWindow.__init__(self)
	layout = QHBoxLayout()
	lineEdit = QLineEdit()
	lineEdit.setText("Just to fill up the dialog")
	layout.addWidget(lineEdit)
	
	self.widget = QWidget()
        self.widget.setLayout(layout)

        self.setCentralWidget(self.widget)
	self.setWindowTitle("Win2")

class MainWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)        
	layout = QHBoxLayout()
	button = QPushButton()
        layout.addWidget(button)
	
        self.widget = QWidget()
        self.widget.setLayout(layout)

        self.setCentralWidget(self.widget)
        self.setWindowTitle("Win1")

        self.connect(button, SIGNAL('clicked()'), self.newWindow)
    def newWindow(self):
	self.myOtherWindow = OtherWindow()
	self.myOtherWindow.show()
    
if __name__ == "__main__":

    app = QApplication(sys.argv)
    mainWindow = MainWindow()   
    mainWindow.setGeometry(100, 100, 200, 200)
    mainWindow.show()
    sys.exit(app.exec_())

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So the key point is the latter part:

...
        self.connect(button, SIGNAL('clicked()'), self.newWindow)
    def newWindow(self):
	self.myOtherWindow = OtherWindow()
	self.myOtherWindow.show()

...
        self.connect(button, SIGNAL('clicked()'), self.newWindow)
    def newWindow(self):
	self.myOtherWindow = OtherWindow()
	self.myOtherWindow.show()

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In the init of MainWindow, you connect the clicked signal of button to newWindow method.

newWindow method just creates a second window and shows it. That's it.