thermostat/pytec/waitingspinnerwidget.py

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2023-09-01 15:55:14 +08:00
"""
The MIT License (MIT)
Copyright (c) 2012-2014 Alexander Turkin
Copyright (c) 2014 William Hallatt
Copyright (c) 2015 Jacob Dawid
Copyright (c) 2016 Luca Weiss
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""
import math
from PyQt6.QtCore import *
from PyQt6.QtGui import *
from PyQt6.QtWidgets import *
class QtWaitingSpinner(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
# WAS IN initialize()
self._color = QColor(Qt.GlobalColor.black)
self._roundness = 100.0
self._minimumTrailOpacity = 3.14159265358979323846
self._trailFadePercentage = 80.0
self._revolutionsPerSecond = 1.57079632679489661923
self._numberOfLines = 20
self._lineLength = 5
self._lineWidth = 2
self._innerRadius = 5
self._currentCounter = 0
self._timer = QTimer(self)
self._timer.timeout.connect(self.rotate)
self.updateSize()
self.updateTimer()
# END initialize()
self.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground)
def paintEvent(self, QPaintEvent):
painter = QPainter(self)
painter.fillRect(self.rect(), Qt.GlobalColor.transparent)
painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
if self._currentCounter >= self._numberOfLines:
self._currentCounter = 0
painter.setPen(Qt.PenStyle.NoPen)
for i in range(0, self._numberOfLines):
painter.save()
painter.translate(self._innerRadius + self._lineLength, self._innerRadius + self._lineLength)
rotateAngle = float(360 * i) / float(self._numberOfLines)
painter.rotate(rotateAngle)
painter.translate(self._innerRadius, 0)
distance = self.lineCountDistanceFromPrimary(i, self._currentCounter, self._numberOfLines)
color = self.currentLineColor(distance, self._numberOfLines, self._trailFadePercentage,
self._minimumTrailOpacity, self._color)
painter.setBrush(color)
painter.drawRoundedRect(QRect(0, int(-self._lineWidth / 2), self._lineLength, self._lineWidth), self._roundness,
self._roundness, Qt.SizeMode.RelativeSize)
painter.restore()
def start(self):
if not self._timer.isActive():
self._timer.start()
self._currentCounter = 0
def stop(self):
if self._timer.isActive():
self._timer.stop()
self._currentCounter = 0
def setNumberOfLines(self, lines):
self._numberOfLines = lines
self._currentCounter = 0
self.updateTimer()
def setLineLength(self, length):
self._lineLength = length
self.updateSize()
def setLineWidth(self, width):
self._lineWidth = width
self.updateSize()
def setInnerRadius(self, radius):
self._innerRadius = radius
self.updateSize()
def color(self):
return self._color
def roundness(self):
return self._roundness
def minimumTrailOpacity(self):
return self._minimumTrailOpacity
def trailFadePercentage(self):
return self._trailFadePercentage
def revolutionsPersSecond(self):
return self._revolutionsPerSecond
def numberOfLines(self):
return self._numberOfLines
def lineLength(self):
return self._lineLength
def lineWidth(self):
return self._lineWidth
def innerRadius(self):
return self._innerRadius
def setRoundness(self, roundness):
self._roundness = max(0.0, min(100.0, roundness))
def setColor(self, color=Qt.GlobalColor.black):
self._color = QColor(color)
def setRevolutionsPerSecond(self, revolutionsPerSecond):
self._revolutionsPerSecond = revolutionsPerSecond
self.updateTimer()
def setTrailFadePercentage(self, trail):
self._trailFadePercentage = trail
def setMinimumTrailOpacity(self, minimumTrailOpacity):
self._minimumTrailOpacity = minimumTrailOpacity
def rotate(self):
self._currentCounter += 1
if self._currentCounter >= self._numberOfLines:
self._currentCounter = 0
self.update()
def updateSize(self):
self.size = (self._innerRadius + self._lineLength) * 2
self.setFixedSize(self.size, self.size)
def updateTimer(self):
self._timer.setInterval(int(1000 / (self._numberOfLines * self._revolutionsPerSecond)))
def lineCountDistanceFromPrimary(self, current, primary, totalNrOfLines):
distance = primary - current
if distance < 0:
distance += totalNrOfLines
return distance
def currentLineColor(self, countDistance, totalNrOfLines, trailFadePerc, minOpacity, colorinput):
color = QColor(colorinput)
if countDistance == 0:
return color
minAlphaF = minOpacity / 100.0
distanceThreshold = int(math.ceil((totalNrOfLines - 1) * trailFadePerc / 100.0))
if countDistance > distanceThreshold:
color.setAlphaF(minAlphaF)
else:
alphaDiff = color.alphaF() - minAlphaF
gradient = alphaDiff / float(distanceThreshold + 1)
resultAlpha = color.alphaF() - gradient * countDistance
# If alpha is out of bounds, clip it.
resultAlpha = min(1.0, max(0.0, resultAlpha))
color.setAlphaF(resultAlpha)
return color
if __name__ == '__main__':
app = QApplication([])
waiting_spinner = QtWaitingSpinner()
waiting_spinner.show()
waiting_spinner.start()
app.exec()