使用PySide开发GUI

Question

I am trying to get buttons and a menu bar inside a GUI application. When I run my code the GUI is seen with the menu bar but the button is not seen. Here is my sample code. And the code compiles without any error.

import sys
from PySide.QtGui import *
from PySide.QtCore import *

class guiwindow(QMainWindow):

    def __init__(self):
        super(guiwindow,self).__init__()

        self.menubar()

    def menubar(self):
        textEdit = QWidget()
        self.setCentralWidget(textEdit)

        exitAction = QAction('Exit', self)
        exitAction.setShortcut('Ctrl+Q')
        exitAction.setStatusTip('Exit application')
        exitAction.triggered.connect(self.close)

        self.statusBar()

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(exitAction)

        self.setGeometry(400, 100, 1200, 800)
        self.setWindowTitle("Menubar + Buttons")


        button = QPushButton("Test")
        hbox = QHBoxLayout()
        hbox.addStretch(1)
        hbox.addWidget(button)
        self.setLayout(hbox)  
        self.show()


def main():
    app = QApplication(sys.argv)
    ex = guiwindow()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Answer 1

Generally, in GUI programming you'll have to be faimliar with the concept of parent and child widgets. If you want your button to be inside your window, then the later should be a child of the former.

So use:

button = QPushButton("Test", parent=self)

Instead of:

button = QPushButton("Test")

Hope this helps!