startapp.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# quitter.py - provide a button to quit this "program"

import sys
import platform

from PySide.QtGui import QMainWindow, QPushButton, QApplication, QMessageBox, QTextEdit, QWidget, QVBoxLayout, QHBoxLayout
from PySide import QtCore
from PySide.QtGui import QStackedWidget
import PySide

class MainWindow(QMainWindow):

    def __init__(self, parent=None):

        super(MainWindow, self).__init__(parent)

        self.mainWidget = MainWidget(MainWindow)
        self.searchWidget = SearchWidget()
        self.sWidget = QStackedWidget()
        self.sWidget.addWidget(self.mainWidget)
        self.sWidget.addWidget(self.searchWidget)
        self.setCentralWidget(self.sWidget)

        self.initUI()

    def initUI(self):

        self.resize(300,500)
        self.statusBar()
        self.statusBar().showMessage('Elo Elo')
        self.setWindowTitle('StartApp Welcome')

    """ Esc zamyka program (keyPressEvent) """

    def keyPressEvent(self, e):

        if e.key() == QtCore.Qt.Key_Escape:
            self.close()


class MainWidget(QWidget):

    def __init__(self, parent=None):

        super(MainWidget,self).__init__(parent)
        self.initUI()

    def initUI(self):

        searchButton = QPushButton('searchButton',self)
        optionButton = QPushButton('optionButton',self)
        quitButton = QPushButton('quitButton',self)
        listButton = QPushButton('listButton',self)

        searchButton.clicked.connect(self.goSearch)

        hbox = QHBoxLayout()
        hbox.addWidget(listButton)
        hbox.addWidget(quitButton)

        vbox = QVBoxLayout()
        vbox.addStretch(1)
        vbox.addWidget(searchButton)
        vbox.addWidget(optionButton)
        vbox.addLayout(hbox)

        self.setLayout(vbox)

    def goSearch(self):
        self.parent().sWidget.setCurrentWidget(self.parent().searchWidget)

    #def buttonClicked(self):
    #
    #    sender = self.sender()
    #    MainWindow.statusBar().showMessage(sender.text() + ' was pressed')

class SearchWidget(QWidget):

    def __init__(self, parent=MainWindow):

        super(SearchWidget,self).__init__()
        self.initUI()

    def initUI(self):

        backButton = QPushButton('GoBack', self)
        backButton.clicked.connect(self.goBack)

    def goBack(self):
        #mainWidget = MainWidget()
        self.parent().sWidget.setCurrentWidget(self.parent().mainWidget)

def main():

    app = QApplication(sys.argv)
    frame = MainWindow()
    frame.show()
    app.exec_()

if __name__ == '__main__':
    main()