Notes:
Lesson 3.4: Getting artistic
Now we’ve learned to use functions, as well as manipulating data, let’s get back to something a bit more visual. This time we’re going to get on with displaying graphics, controlling widgets and using classes.
# Include the system and graphical user interface modules import sys
from PySide.QtGui import * class MyWindow (QWidget): def __init__ (self):
super (MyWindow,self).__init__() # name the widget self.setWindowTitle( 'Window Events' ) # create a label (a bit of text) self.label = QLabel( 'Read Me' , self) button = QPushButton( 'Push Me' , self) button.clicked.connect(self.buttonClicked) # create a vertically orientated layout box # for the other widgets # create a button widget, position it and # connect a function when it is clicked
layout = QVBoxLayout(self) layout.addWidget(button) layout.addWidget(self.label) # track the mouse self.setMouseTracking( True ) def buttonClicked (self):
""" Update the text when the button is clicked """ self.label.setText("Clicked") def mouseMoveEvent (self, event): """ Update the text when the (tracked) mouse moves over MyWindow """ self.label.setText( str (event.x()) + "," + str (event.y())) # start an application and create a widget for the window, # giving it a name
application = QApplication(sys.argv) # construct a widget called MyWindow widget = MyWindow() # show the widget widget.show() # start the application so it can do things # with the widgets we've created application.exec_()
Experiments in Python
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