How QApplication() and QWidget() are connected?
This is an example code that I copied, it creates QApplication object and QWidget object, but there is no link between the two objects. I expected something like app.setWidget(did)
to teach PySide/PyQt controller about the widget that was created.
# http://zetcode.com/gui/pysidetutorial/firstprograms/
# 1. PySide.QtGui is the class
import sys
from PySide import QtGui
# 2. setup the application
app = QtGui.QApplication(sys.argv)
# 3. create the widget and setup
wid = QtGui.QWidget()
wid.resize(250, 150)
wid.setWindowTitle('Simple')
# 4. Show the widget
wid.show()
# 5. execute the app
sys.exit(app.exec_())
What's the magic behind this?
See Question&Answers more detail:os