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############################################################################
##
## Copyright (C) 2020 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## BSD License Usage
## Alternatively, you may use this file under the terms of the BSD license
## as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
############################################################################
from PySide6.QtCore import QBasicTimer, Property
from PySide6.QtGui import QColor, QFontMetrics, QPainter, QPalette
from PySide6.QtWidgets import QWidget
class WigglyWidget(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self._step = 0
self._text = ""
self.setBackgroundRole(QPalette.Midlight)
self.setAutoFillBackground(True)
new_font = self.font()
new_font.setPointSize(new_font.pointSize() + 20)
self.setFont(new_font)
self._timer = QBasicTimer()
def isRunning(self):
return self._timer.isActive()
def setRunning(self, r):
if r == self.isRunning():
return
if r:
self._timer.start(60, self)
else:
self._timer.stop()
def paintEvent(self, event):
if not self._text:
return
sineTable = [0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100,
-92, -71, -38]
metrics = QFontMetrics(self.font())
x = (self.width() - metrics.horizontalAdvance(self.text)) / 2
y = (self.height() + metrics.ascent() - metrics.descent()) / 2
color = QColor()
painter = QPainter(self)
for i in range(len(self.text)):
index = (self._step + i) % 16
color.setHsv((15 - index) * 16, 255, 191)
painter.setPen(color)
dy = (sineTable[index] * metrics.height()) / 400
c = self._text[i]
painter.drawText(x, y - dy, str(c))
x += metrics.horizontalAdvance(c)
def timerEvent(self, event):
if event.timerId() == self._timer.timerId():
self._step += 1
self.update()
else:
QWidget.timerEvent(event)
def text(self):
return self._text
def setText(self, text):
self._text = text
running = Property(bool, isRunning, setRunning)
text = Property(str, text, setText)
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