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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
##
## This file is part of the example classes of the Qt Toolkit.
##
## This file may be used under the terms of the GNU General Public
## License version 2.0 as published by the Free Software Foundation
## and appearing in the file LICENSE.GPL included in the packaging of
## this file. Please review the following information to ensure GNU
## General Public Licensing requirements will be met:
## http://www.trolltech.com/products/qt/opensource.html
##
## If you are unsure which license is appropriate for your use, please
## review the following information:
## http://www.trolltech.com/products/qt/licensing.html or contact the
## sales department at sales@trolltech.com.
##
## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
#############################################################################
from PyQt4 import QtCore, QtGui
class WigglyWidget(QtGui.QWidget):
def __init__(self, parent=None):
super(WigglyWidget, self).__init__(parent)
self.setBackgroundRole(QtGui.QPalette.Midlight)
self.setAutoFillBackground(True)
newFont = self.font()
newFont.setPointSize(newFont.pointSize() + 20)
self.setFont(newFont)
self.timer = QtCore.QBasicTimer()
self.text = ''
self.step = 0;
self.timer.start(60, self)
def paintEvent(self, event):
sineTable = (0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38)
metrics = QtGui.QFontMetrics(self.font())
x = (self.width() - metrics.width(self.text)) / 2
y = (self.height() + metrics.ascent() - metrics.descent()) / 2
color = QtGui.QColor()
painter = QtGui.QPainter(self)
for i, ch in enumerate(self.text):
index = (self.step + i) % 16
color.setHsv((15 - index) * 16, 255, 191)
painter.setPen(color)
painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400), ch)
x += metrics.width(ch)
def setText(self, newText):
self.text = newText
def timerEvent(self, event):
if event.timerId() == self.timer.timerId():
self.step += 1
self.update()
else:
super(WigglyWidget, self).timerEvent(event)
class Dialog(QtGui.QDialog):
def __init__(self, parent=None):
super(Dialog, self).__init__(parent)
wigglyWidget = WigglyWidget()
lineEdit = QtGui.QLineEdit()
layout = QtGui.QVBoxLayout()
layout.addWidget(wigglyWidget)
layout.addWidget(lineEdit)
self.setLayout(layout)
lineEdit.textChanged.connect(wigglyWidget.setText)
lineEdit.setText("Hello world!")
self.setWindowTitle("Wiggly")
self.resize(360, 145)
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
dialog = Dialog()
dialog.show();
sys.exit(app.exec_())
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