QtGui.QFontDialog

The QtGui.QFontDialog is a dialog widget for selecting a font.

#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
ZetCode PyQt4 tutorial 

In this example, we select a font name
and change the font of a label. 

author: Jan Bodnar
website: zetcode.com 
last edited: October 2011
"""

import sys
from PyQt4 import QtGui


class Example(QtGui.QWidget):
    
    def __init__(self):
        super(Example, self).__init__()
        
        self.initUI()
        
    def initUI(self):      

        vbox = QtGui.QVBoxLayout()

        btn = QtGui.QPushButton(‘Dialog‘, self)
        btn.setSizePolicy(QtGui.QSizePolicy.Fixed,
            QtGui.QSizePolicy.Fixed)
        
        btn.move(20, 20)

        vbox.addWidget(btn)

        btn.clicked.connect(self.showDialog)
        
        self.lbl = QtGui.QLabel(‘Knowledge only matters‘, self)
        self.lbl.move(130, 20)

        vbox.addWidget(self.lbl)
        self.setLayout(vbox)          
        
        self.setGeometry(300, 300, 250, 180)
        self.setWindowTitle(‘Font dialog‘)
        self.show()
        
    def showDialog(self):

        font, ok = QtGui.QFontDialog.getFont()
        if ok:
            self.lbl.setFont(font)
        
def main():
    
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())


if __name__ == ‘__main__‘:
    main()

In our example, we have a button and a label. With QtGui.QFontDialog, we change the font of the label.

font, ok = QtGui.QFontDialog.getFont()

Here we pop up the font dialog. The getFont() method returns the font name and the ok parameter. It is equal to True if the user clicked OK; otherwise it is False.

if ok:
    self.label.setFont(font)

If we clicked ok, the font of the label would be changed.

QtGui.QFontDialog

原文：http://www.cnblogs.com/hushaojun/p/4435709.html