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#!/usr/bin/env python3
# qtvcp
#
# Copyright (c) 2017 Chris Morley <chrisinnanaimo@hotmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
#################################################################################
from PyQt5.QtCore import pyqtProperty, pyqtSlot, Qt, QTimer, QSize
from PyQt5.QtGui import QColor, QPainter, QBrush, QRadialGradient
from PyQt5.QtWidgets import QWidget
from qtvcp.widgets.widget_baseclass import _HalWidgetBase, hal
from qtvcp import logger
# Instantiate the libraries with global reference
# LOG is for running code logging
LOG = logger.getLogger(__name__)
# Set the log level for this module
# LOG.setLevel(logger.INFO) # One of DEBUG, INFO, WARNING, ERROR, CRITICAL
class LED(QWidget, _HalWidgetBase):
def __init__(self, parent=None):
super(LED, self).__init__(parent)
self._diamX = 0
self._diamY = 0
self._diameter = 15
self._color = QColor("red")
self._off_color = QColor("black")
self._border_color = QColor("black")
self._alignment = Qt.AlignCenter
self.state = False
self.flash = False
self._state = False
self._flashing = False
self._flashRate = 200
self._timer = QTimer()
self._timer.timeout.connect(self.toggleState)
self.setDiameter(self._diameter)
self._halpin_option = True
def _hal_init(self):
if (self._halpin_option):
if self._pin_name_ == '':
pname = self.HAL_NAME_
else:
pname = self._pin_name_
self.hal_pin = self.HAL_GCOMP_.newpin(pname, hal.HAL_BIT, hal.HAL_IN)
self.hal_pin.value_changed.connect(lambda s: self.change_state(s))
# not sure we need a flash pin
#self.hal_pin_flash = self.HAL_GCOMP_.newpin(self.HAL_NAME_+'-flash', hal.HAL_BIT, hal.HAL_IN)
#self.hal_pin_flash.value_changed.connect( lambda s: self.setFlashing(s))
@pyqtSlot(bool)
def change_state(self, data):
self.state = data
if data and self.flash:
self.setFlashing(True)
elif data and not self.flash:
self.setState(True)
else:
self.setFlashing(False)
self.setState(False)
def paintEvent(self, event):
painter = QPainter()
x = 0
y = 0
if self._alignment & Qt.AlignLeft:
x = 0
elif self._alignment & Qt.AlignRight:
x = self.width() - self._diameter
elif self._alignment & Qt.AlignHCenter:
x = (self.width() - self._diameter) // 2
elif self._alignment & Qt.AlignJustify:
x = 0
if self._alignment & Qt.AlignTop:
y = 0
elif self._alignment & Qt.AlignBottom:
y = self.height() - self._diameter
elif self._alignment & Qt.AlignVCenter:
y = (self.height() - self._diameter) // 2
gradient = QRadialGradient(x + self._diameter / 2, y + self._diameter / 2,
self._diameter * 0.4, self._diameter * 0.4, self._diameter * 0.4)
gradient.setColorAt(0, Qt.white)
if self._state:
gradient.setColorAt(1, self._color)
else:
gradient.setColorAt(1, self._off_color)
painter.begin(self)
brush = QBrush(gradient)
painter.setPen(self._border_color)
painter.setRenderHint(QPainter.Antialiasing, True)
painter.setBrush(brush)
painter.drawEllipse(x, y, self._diameter - 1, self._diameter - 1)
painter.end()
def minimumSizeHint(self):
return QSize(self._diameter, self._diameter)
def sizeHint(self):
return QSize(self._diameter, self._diameter)
def getDiameter(self):
return self._diameter
def set_halpin_option(self, value):
self._halpin_option = value
def get_halpin_option(self):
return self._halpin_option
def reset_halpin_option(self):
self._halpin_option = True
@pyqtSlot(int)
def setDiameter(self, value):
self._diameter = value
self.update()
def getColor(self):
return self._color
@pyqtSlot(QColor)
def setColor(self, value):
self._color = value
self.update()
def getOffColor(self):
return self._off_color
@pyqtSlot(QColor)
def setOffColor(self, value):
self._off_color = value
self.update()
def getBorderColor(self):
return self._border_color
@pyqtSlot(QColor)
def setBorderColor(self, value):
self._border_color = value
self.update()
def getAlignment(self):
return self._alignment
@pyqtSlot(Qt.Alignment)
def setAlignment(self, value):
self._alignment = value
self.update()
def resetAlignment(self):
self._alignment = Qt.AlignCenter
@pyqtSlot(bool)
@pyqtSlot(int)
def setState(self, value):
self.state = self._state = value
self.update()
def getState(self):
return self.state
def resetState(self):
self.state = self._state = False
@pyqtSlot()
def toggleState(self):
self._state = not self._state
self.update()
def isFlashing(self):
return self._flashing
@pyqtSlot(bool)
def setFlashing(self, value):
self._flashing = value
if self._flashRate > 0 and value:
if self._timer.isActive():
return
self._timer.start(self._flashRate)
else:
self._timer.stop()
# make sure when flashing stops led ends up at state
self._state = self.state
self.update()
# flash when state on
def setFlashState(self, value):
self.flash = value
self.update()
def getFlashState(self):
return self.flash
def getFlashRate(self):
return self._flashRate
@pyqtSlot(int)
def setFlashRate(self, value):
self._flashRate = value
self.update()
def set_pin_name(self, value):
self._pin_name_ = value
def get_pin_name(self):
return self._pin_name_
def reset_pin_name(self):
self._pin_name_ = ''
pin_name = pyqtProperty(str, get_pin_name, set_pin_name, reset_pin_name)
halpin_option = pyqtProperty(bool, get_halpin_option, set_halpin_option, reset_halpin_option)
diameter = pyqtProperty(int, getDiameter, setDiameter)
color = pyqtProperty(QColor, getColor, setColor)
off_color = pyqtProperty(QColor, getOffColor, setOffColor)
border_color = pyqtProperty(QColor, getBorderColor, setBorderColor)
alignment = pyqtProperty(Qt.Alignment, getAlignment, setAlignment, resetAlignment)
currentstate = pyqtProperty(bool, getState, setState, resetState)
flashing = pyqtProperty(bool, getFlashState, setFlashState)
flashRate = pyqtProperty(int, getFlashRate, setFlashRate)
if __name__ == "__main__":
import sys
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
led = LED()
led.show()
# Flash always when method called test
#led.setFlashing(True)
# this shouldn't matter
#led.setState(False)
# Flash only when state on test
led.setFlashState(True)
# only flash when this is true
led.change_state(False)
sys.exit(app.exec_())
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