#!/usr/bin/env python3
import PyQt5.QtGui as QtGui
import PyQt5.QtCore as QtCore
import numpy as numpy
class Guide:
def __init__(self, pen=None):
if pen is None:
pen = QtGui.QPen()
assert isinstance(pen, QtGui.QPen)
self.pen = pen
def drawShape(self, pen):
assert isinstance(pen, QtGui.QPainter)
pen.save()
pen.setPen(self.pen)
class LineGuide(Guide):
def __init__(self, origin, direction, pen=None):
super().__init__(pen)
self.origin = origin
self.direction = direction
def drawShape(self, pen):
super().drawShape(pen)
p1 = self.origin + (9999 * QtCore.QPointF(numpy.cos(self.direction), numpy.sin(self.direction)))
p2 = self.origin - (9999 * QtCore.QPointF(numpy.cos(self.direction), numpy.sin(self.direction)))
pen.drawLine(QtCore.QLineF(p1, p2))
pen.restore()
class ArcGuide(Guide):
@classmethod
def radTo16Deg(cls, radians):
return int(round(numpy.rad2deg(radians) * 16))
def __init__(self, center=None, radius=1, startAng=0, endAng=(2*numpy.pi), pen=None):
if center is None:
center = QtCore.QPointF(0, 0)
super().__init__(pen)
self.center = center
self.radius = int(radius)
self.startAng = startAng
self.endAng = endAng
def drawShape(self, pen):
super().drawShape(pen)
assert isinstance(pen, QtGui.QPainter)
x, y = int(round(self.center.x())), int(round(self.center.y()))
pen.drawArc(x - self.radius, y - self.radius, 2 * self.radius, 2 * self.radius, ArcGuide.radTo16Deg(self.startAng),
-ArcGuide.radTo16Deg(self.endAng - self.startAng))
pen.restore()
