kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
134 wiersze
4.8 KiB
Python
134 wiersze
4.8 KiB
Python
# NanoVNASaver
|
|
#
|
|
# A python program to view and export Touchstone data from a NanoVNA
|
|
# Copyright (C) 2019, 2020 Rune B. Broberg
|
|
# Copyright (C) 2020,2021 NanoVNA-Saver Authors
|
|
#
|
|
# 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 3 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.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
import math
|
|
import logging
|
|
from typing import List
|
|
|
|
from PyQt5 import QtGui
|
|
|
|
from NanoVNASaver.RFTools import Datapoint
|
|
from NanoVNASaver.Charts.Chart import Chart
|
|
from NanoVNASaver.Charts.Frequency import FrequencyChart
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class MagnitudeChart(FrequencyChart):
|
|
def __init__(self, name=""):
|
|
super().__init__(name)
|
|
|
|
self.minDisplayValue = 0
|
|
|
|
self.fixedValues = True
|
|
self.y_action_fixed_span.setChecked(True)
|
|
self.y_action_automatic.setChecked(False)
|
|
|
|
self.minValue = 0
|
|
|
|
def drawValues(self, qp: QtGui.QPainter):
|
|
if not self.data and not self.reference:
|
|
return
|
|
|
|
self._set_start_stop()
|
|
|
|
# Draw bands if required
|
|
if self.bands.enabled:
|
|
self.drawBands(qp, self.fstart, self.fstop)
|
|
|
|
if self.fixedValues:
|
|
max_value = self.maxDisplayValue
|
|
min_value = self.minDisplayValue
|
|
else:
|
|
# Find scaling
|
|
min_value = 100
|
|
max_value = 0
|
|
for d in self.data:
|
|
mag = self.magnitude(d)
|
|
max_value = max(max_value, mag)
|
|
min_value = min(min_value, mag)
|
|
# Also check min/max for the reference sweep
|
|
for d in self.reference:
|
|
if d.freq < self.fstart or d.freq > self.fstop:
|
|
continue
|
|
max_value = max(max_value, mag)
|
|
min_value = min(min_value, mag)
|
|
min_value = 10 * math.floor(min_value / 10)
|
|
max_value = 10 * math.ceil(max_value / 10)
|
|
|
|
self.maxValue = max_value
|
|
self.minValue = min_value
|
|
|
|
self.span = (max_value - min_value) or 0.01
|
|
|
|
target_ticks = int(self.dim.height // 60)
|
|
for i in range(target_ticks):
|
|
val = min_value + i / target_ticks * self.span
|
|
y = self.topMargin + int((self.maxValue - val) / self.span
|
|
* self.dim.height)
|
|
qp.setPen(Chart.color.text)
|
|
if val != min_value:
|
|
digits = max(0, min(2, math.floor(3 - math.log10(abs(val)))))
|
|
vswrstr = (str(round(val)) if digits == 0 else
|
|
str(round(val, digits)))
|
|
qp.drawText(3, y + 3, vswrstr)
|
|
qp.setPen(QtGui.QPen(Chart.color.foreground))
|
|
qp.drawLine(self.leftMargin - 5, y,
|
|
self.leftMargin + self.dim.width, y)
|
|
|
|
qp.setPen(QtGui.QPen(Chart.color.foreground))
|
|
qp.drawLine(self.leftMargin - 5, self.topMargin,
|
|
self.leftMargin + self.dim.width, self.topMargin)
|
|
qp.setPen(Chart.color.text)
|
|
qp.drawText(3, self.topMargin + 4, str(max_value))
|
|
qp.drawText(3, self.dim.height + self.topMargin, str(min_value))
|
|
self.drawFrequencyTicks(qp)
|
|
|
|
qp.setPen(Chart.color.swr)
|
|
for vswr in self.swrMarkers:
|
|
if vswr <= 1:
|
|
continue
|
|
mag = (vswr - 1) / (vswr + 1)
|
|
y = self.topMargin + int((self.maxValue - mag) / self.span
|
|
* self.dim.height)
|
|
qp.drawLine(self.leftMargin, y,
|
|
self.leftMargin + self.dim.width, y)
|
|
qp.drawText(self.leftMargin + 3, y - 1, f"VSWR: {vswr}")
|
|
|
|
self.drawData(qp, self.data, Chart.color.sweep)
|
|
self.drawData(qp, self.reference, Chart.color.reference)
|
|
self.drawMarkers(qp)
|
|
|
|
def getYPosition(self, d: Datapoint) -> int:
|
|
mag = self.magnitude(d)
|
|
return self.topMargin + int(
|
|
(self.maxValue - mag) / self.span * self.dim.height)
|
|
|
|
def valueAtPosition(self, y) -> List[float]:
|
|
absy = y - self.topMargin
|
|
val = -1 * ((absy / self.dim.height * self.span) - self.maxValue)
|
|
return [val]
|
|
|
|
@staticmethod
|
|
def magnitude(p: Datapoint) -> float:
|
|
return math.sqrt(p.re**2 + p.im**2)
|
|
|
|
def copy(self):
|
|
new_chart = super().copy()
|
|
new_chart.span = self.span
|
|
return new_chart
|