kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
482 wiersze
19 KiB
Python
482 wiersze
19 KiB
Python
# NanoVNASaver
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#
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# A python program to view and export Touchstone data from a NanoVNA
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# Copyright (C) 2019, 2020 Rune B. Broberg
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# Copyright (C) 2020,2021 NanoVNA-Saver Authors
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import math
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import logging
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from typing import List, Optional
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from PyQt5 import QtWidgets, QtGui
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from NanoVNASaver.Formatting import format_frequency_chart
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from NanoVNASaver.Marker.Widget import Marker
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from NanoVNASaver.RFTools import Datapoint
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from NanoVNASaver.SITools import Format, Value
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from NanoVNASaver.Charts.Chart import Chart
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from NanoVNASaver.Charts.Frequency import FrequencyChart
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logger = logging.getLogger(__name__)
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class RealImaginaryChart(FrequencyChart):
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def __init__(self, name=""):
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super().__init__(name)
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self.leftMargin = 45
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self.rightMargin = 45
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self.dim.width = 230
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self.dim.height = 250
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self.fstart = 0
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self.fstop = 0
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self.span_real = 0.01
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self.span_imag = 0.01
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self.max_real = 0
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self.max_imag = 0
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self.maxDisplayReal = 100
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self.maxDisplayImag = 100
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self.minDisplayReal = 0
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self.minDisplayImag = -100
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#
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# Build the context menu
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#
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self.y_menu.clear()
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self.y_action_automatic = QtWidgets.QAction("Automatic")
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self.y_action_automatic.setCheckable(True)
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self.y_action_automatic.setChecked(True)
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self.y_action_automatic.changed.connect(
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lambda: self.setFixedValues(self.y_action_fixed_span.isChecked()))
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self.y_action_fixed_span = QtWidgets.QAction("Fixed span")
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self.y_action_fixed_span.setCheckable(True)
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self.y_action_fixed_span.changed.connect(
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lambda: self.setFixedValues(self.y_action_fixed_span.isChecked()))
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mode_group = QtWidgets.QActionGroup(self)
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mode_group.addAction(self.y_action_automatic)
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mode_group.addAction(self.y_action_fixed_span)
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self.y_menu.addAction(self.y_action_automatic)
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self.y_menu.addAction(self.y_action_fixed_span)
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def copy(self):
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new_chart: RealImaginaryChart = super().copy()
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new_chart.maxDisplayReal = self.maxDisplayReal
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new_chart.maxDisplayImag = self.maxDisplayImag
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new_chart.minDisplayReal = self.minDisplayReal
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new_chart.minDisplayImag = self.minDisplayImag
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return new_chart
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def drawValues(self, qp: QtGui.QPainter):
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if not self.data and not self.reference:
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return
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pen = QtGui.QPen(Chart.color.sweep)
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pen.setWidth(self.dim.point)
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line_pen = QtGui.QPen(Chart.color.sweep)
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line_pen.setWidth(self.dim.line)
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highlighter = QtGui.QPen(QtGui.QColor(20, 0, 255))
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highlighter.setWidth(1)
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self._set_start_stop()
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# Draw bands if required
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if self.bands.enabled:
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self.drawBands(qp, self.fstart, self.fstop)
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min_real, max_real, min_imag, max_imag = self.find_scaling()
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self.max_real = max_real
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self.max_imag = max_imag
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self.span_real = (max_real - min_real) or 0.01
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self.span_imag = (max_imag - min_imag) or 0.01
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self.drawHorizontalTicks(qp)
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fmt = Format(max_nr_digits=3)
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qp.drawText(3, self.dim.height + self.topMargin,
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str(Value(min_real, fmt=fmt)))
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qp.drawText(self.leftMargin + self.dim.width + 8,
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self.dim.height + self.topMargin,
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str(Value(min_imag, fmt=fmt)))
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self.drawFrequencyTicks(qp)
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primary_pen = pen
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secondary_pen = QtGui.QPen(Chart.color.sweep_secondary)
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if self.data:
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c = QtGui.QColor(Chart.color.sweep)
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c.setAlpha(255)
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pen = QtGui.QPen(c)
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pen.setWidth(2)
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qp.setPen(pen)
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qp.drawLine(20, 9, 25, 9)
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c = QtGui.QColor(Chart.color.sweep_secondary)
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c.setAlpha(255)
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pen.setColor(c)
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qp.setPen(pen)
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qp.drawLine(self.leftMargin + self.dim.width, 9,
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self.leftMargin + self.dim.width + 5, 9)
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primary_pen.setWidth(self.dim.point)
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secondary_pen.setWidth(self.dim.point)
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line_pen.setWidth(self.dim.line)
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for i, data in enumerate(self.data):
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x = self.getXPosition(data)
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y_re = self.getReYPosition(data)
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y_im = self.getImYPosition(data)
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qp.setPen(primary_pen)
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if self.isPlotable(x, y_re):
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qp.drawPoint(x, y_re)
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qp.setPen(secondary_pen)
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if self.isPlotable(x, y_im):
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qp.drawPoint(x, y_im)
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if self.flag.draw_lines and i > 0:
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prev_x = self.getXPosition(self.data[i - 1])
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prev_y_re = self.getReYPosition(self.data[i - 1])
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prev_y_im = self.getImYPosition(self.data[i - 1])
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# Real part first
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line_pen.setColor(Chart.color.sweep)
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qp.setPen(line_pen)
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if self.isPlotable(x, y_re):
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if self.isPlotable(prev_x, prev_y_re):
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qp.drawLine(x, y_re, prev_x, prev_y_re)
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else:
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new_x, new_y = self.getPlotable(
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x, y_re, prev_x, prev_y_re)
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qp.drawLine(x, y_re, new_x, new_y)
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elif self.isPlotable(prev_x, prev_y_re):
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new_x, new_y = self.getPlotable(prev_x, prev_y_re, x, y_re)
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qp.drawLine(prev_x, prev_y_re, new_x, new_y)
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# Imag part second
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line_pen.setColor(Chart.color.sweep_secondary)
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qp.setPen(line_pen)
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if self.isPlotable(x, y_im):
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if self.isPlotable(prev_x, prev_y_im):
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qp.drawLine(x, y_im, prev_x, prev_y_im)
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else:
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new_x, new_y = self.getPlotable(
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x, y_im, prev_x, prev_y_im)
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qp.drawLine(x, y_im, new_x, new_y)
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elif self.isPlotable(prev_x, prev_y_im):
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new_x, new_y = self.getPlotable(prev_x, prev_y_im, x, y_im)
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qp.drawLine(prev_x, prev_y_im, new_x, new_y)
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primary_pen.setColor(Chart.color.reference)
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line_pen.setColor(Chart.color.reference)
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secondary_pen.setColor(Chart.color.reference_secondary)
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qp.setPen(primary_pen)
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if self.reference:
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c = QtGui.QColor(Chart.color.reference)
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c.setAlpha(255)
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pen = QtGui.QPen(c)
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pen.setWidth(2)
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qp.setPen(pen)
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qp.drawLine(20, 14, 25, 14)
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c = QtGui.QColor(Chart.color.reference_secondary)
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c.setAlpha(255)
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pen = QtGui.QPen(c)
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pen.setWidth(2)
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qp.setPen(pen)
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qp.drawLine(self.leftMargin + self.dim.width, 14,
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self.leftMargin + self.dim.width + 5, 14)
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for i, reference in enumerate(self.reference):
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if reference.freq < self.fstart or reference.freq > self.fstop:
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continue
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x = self.getXPosition(reference)
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y_re = self.getReYPosition(reference)
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y_im = self.getImYPosition(reference)
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qp.setPen(primary_pen)
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if self.isPlotable(x, y_re):
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qp.drawPoint(x, y_re)
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qp.setPen(secondary_pen)
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if self.isPlotable(x, y_im):
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qp.drawPoint(x, y_im)
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if self.flag.draw_lines and i > 0:
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prev_x = self.getXPosition(self.reference[i - 1])
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prev_y_re = self.getReYPosition(self.reference[i - 1])
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prev_y_im = self.getImYPosition(self.reference[i - 1])
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line_pen.setColor(Chart.color.reference)
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qp.setPen(line_pen)
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# Real part first
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if self.isPlotable(x, y_re):
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if self.isPlotable(prev_x, prev_y_re):
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qp.drawLine(x, y_re, prev_x, prev_y_re)
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else:
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new_x, new_y = self.getPlotable(
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x, y_re, prev_x, prev_y_re)
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qp.drawLine(x, y_re, new_x, new_y)
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elif self.isPlotable(prev_x, prev_y_re):
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new_x, new_y = self.getPlotable(prev_x, prev_y_re, x, y_re)
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qp.drawLine(prev_x, prev_y_re, new_x, new_y)
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line_pen.setColor(Chart.color.reference_secondary)
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qp.setPen(line_pen)
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# Imag part second
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if self.isPlotable(x, y_im):
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if self.isPlotable(prev_x, prev_y_im):
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qp.drawLine(x, y_im, prev_x, prev_y_im)
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else:
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new_x, new_y = self.getPlotable(
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x, y_im, prev_x, prev_y_im)
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qp.drawLine(x, y_im, new_x, new_y)
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elif self.isPlotable(prev_x, prev_y_im):
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new_x, new_y = self.getPlotable(prev_x, prev_y_im, x, y_im)
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qp.drawLine(prev_x, prev_y_im, new_x, new_y)
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# Now draw the markers
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for m in self.markers:
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if m.location != -1:
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x = self.getXPosition(self.data[m.location])
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y_re = self.getReYPosition(self.data[m.location])
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y_im = self.getImYPosition(self.data[m.location])
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self.drawMarker(x, y_re, qp, m.color,
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self.markers.index(m) + 1)
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self.drawMarker(x, y_im, qp, m.color,
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self.markers.index(m) + 1)
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def drawHorizontalTicks(self, qp):
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# We want one horizontal tick per 50 pixels, at most
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fmt = Format(max_nr_digits=3)
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horizontal_ticks = self.dim.height // 50
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for i in range(horizontal_ticks):
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y = self.topMargin + i * self.dim.height // horizontal_ticks
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qp.setPen(QtGui.QPen(Chart.color.foreground))
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qp.drawLine(self.leftMargin - 5, y,
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self.leftMargin + self.dim.width + 5, y)
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qp.setPen(QtGui.QPen(Chart.color.text))
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re = self.max_real - i * self.span_real / horizontal_ticks
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im = self.max_imag - i * self.span_imag / horizontal_ticks
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qp.drawText(3, y + 4, f"{Value(re, fmt=fmt)}")
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qp.drawText(
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self.leftMargin + self.dim.width + 8,
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y + 4,
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f"{Value(im, fmt=fmt)}")
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def find_scaling(self):
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# Find scaling
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if self.fixedValues:
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min_real = self.minDisplayReal
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max_real = self.maxDisplayReal
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min_imag = self.minDisplayImag
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max_imag = self.maxDisplayImag
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return min_real, max_real, min_imag, max_imag
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min_real = 1000
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min_imag = 1000
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max_real = 0
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max_imag = -1000
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for d in self.data:
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imp = self.value(d)
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re, im = imp.real, imp.imag
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if math.isinf(re): # Avoid infinite scales
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continue
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max_real = max(max_real, re)
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min_real = min(min_real, re)
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max_imag = max(max_imag, im)
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min_imag = min(min_imag, im)
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# Also check min/max for the reference sweep
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for d in self.reference:
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if d.freq < self.fstart or d.freq > self.fstop:
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continue
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imp = self.value(d)
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re, im = imp.real, imp.imag
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if math.isinf(re): # Avoid infinite scales
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continue
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max_real = max(max_real, re)
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min_real = min(min_real, re)
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max_imag = max(max_imag, im)
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min_imag = min(min_imag, im)
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# Always have at least 8 numbered horizontal lines
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max_real = math.ceil(max_real)
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min_real = math.floor(min_real)
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max_imag = math.ceil(max_imag)
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min_imag = math.floor(min_imag)
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min_imag, max_imag = self.imag_scaling_constraints(min_imag, max_imag)
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return min_real, max_real, min_imag, max_imag
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def imag_scaling_constraints(self, min_imag, max_imag):
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if max_imag - min_imag < 8:
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missing = 8 - (max_imag - min_imag)
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max_imag += math.ceil(missing / 2)
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min_imag -= math.floor(missing / 2)
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if 0 > max_imag > -2:
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max_imag = 0
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if 0 < min_imag < 2:
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min_imag = 0
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if (max_imag - min_imag) > 8 and min_imag < 0 < max_imag:
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# We should show a "0" line for the reactive part
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span = max_imag - min_imag
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step_size = span / 8
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if max_imag < step_size:
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# The 0 line is the first step after the top.
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# Scale accordingly.
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max_imag = -min_imag / 7
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elif -min_imag < step_size:
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# The 0 line is the last step before the bottom.
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# Scale accordingly.
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min_imag = -max_imag / 7
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else:
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# Scale max_imag to be a whole factor of min_imag
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num_min = math.floor(min_imag / step_size * -1)
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num_max = 8 - num_min
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max_imag = num_max * (min_imag / num_min) * -1
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return min_imag, max_imag
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def getImYPosition(self, d: Datapoint) -> int:
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im = self.value(d).imag
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return int(self.topMargin + (self.max_imag - im) / self.span_imag
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* self.dim.height)
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def getReYPosition(self, d: Datapoint) -> int:
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re = self.value(d).real
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return int(self.topMargin + (self.max_real - re) / self.span_real
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* self.dim.height if math.isfinite(re) else self.topMargin)
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def valueAtPosition(self, y) -> List[float]:
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absy = y - self.topMargin
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valRe = -1 * ((absy / self.dim.height *
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self.span_real) - self.max_real)
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valIm = -1 * ((absy / self.dim.height *
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self.span_imag) - self.max_imag)
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return [valRe, valIm]
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def zoomTo(self, x1, y1, x2, y2):
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val1 = self.valueAtPosition(y1)
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val2 = self.valueAtPosition(y2)
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if len(val1) == len(val2) == 2 and val1[0] != val2[0]:
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self.minDisplayReal = round(min(val1[0], val2[0]), 2)
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self.maxDisplayReal = round(max(val1[0], val2[0]), 2)
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self.minDisplayImag = round(min(val1[1], val2[1]), 2)
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self.maxDisplayImag = round(max(val1[1], val2[1]), 2)
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self.setFixedValues(True)
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freq1 = max(1, self.frequencyAtPosition(x1, limit=False))
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freq2 = max(1, self.frequencyAtPosition(x2, limit=False))
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if freq1 > 0 and freq2 > 0 and freq1 != freq2:
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self.minFrequency = min(freq1, freq2)
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self.maxFrequency = max(freq1, freq2)
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self.setFixedSpan(True)
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self.update()
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def getNearestMarker(self, x, y) -> Optional[Marker]:
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if not self.data:
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return None
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shortest = 10e6
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nearest = None
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for m in self.markers:
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mx, _ = self.getPosition(self.data[m.location])
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myr = self.getReYPosition(self.data[m.location])
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myi = self.getImYPosition(self.data[m.location])
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dx = abs(x - mx)
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dy = min(abs(y - myr), abs(y - myi))
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distance = math.sqrt(dx**2 + dy**2)
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if distance < shortest:
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shortest = distance
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nearest = m
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return nearest
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def setMinimumRealValue(self):
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min_val, selected = QtWidgets.QInputDialog.getDouble(
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self, "Minimum real value",
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"Set minimum real value", value=self.minDisplayReal,
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decimals=2)
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if not selected:
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return
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if not (self.fixedValues and min_val >= self.maxDisplayReal):
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self.minDisplayReal = min_val
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if self.fixedValues:
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self.update()
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def setMaximumRealValue(self):
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max_val, selected = QtWidgets.QInputDialog.getDouble(
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self, "Maximum real value",
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"Set maximum real value", value=self.maxDisplayReal,
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decimals=2)
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if not selected:
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return
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if not (self.fixedValues and max_val <= self.minDisplayReal):
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self.maxDisplayReal = max_val
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if self.fixedValues:
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self.update()
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def setMinimumImagValue(self):
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min_val, selected = QtWidgets.QInputDialog.getDouble(
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self, "Minimum imaginary value",
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"Set minimum imaginary value", value=self.minDisplayImag,
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decimals=2)
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if not selected:
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return
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if not (self.fixedValues and min_val >= self.maxDisplayImag):
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self.minDisplayImag = min_val
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if self.fixedValues:
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self.update()
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def setMaximumImagValue(self):
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max_val, selected = QtWidgets.QInputDialog.getDouble(
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self, "Maximum imaginary value",
|
|
"Set maximum imaginary value", value=self.maxDisplayImag,
|
|
decimals=2)
|
|
if not selected:
|
|
return
|
|
if not (self.fixedValues and max_val <= self.minDisplayImag):
|
|
self.maxDisplayImag = max_val
|
|
if self.fixedValues:
|
|
self.update()
|
|
|
|
def setFixedValues(self, fixed_values: bool):
|
|
self.fixedValues = fixed_values
|
|
if (fixed_values and
|
|
(self.minDisplayReal >= self.maxDisplayReal or
|
|
self.minDisplayImag > self.maxDisplayImag)):
|
|
self.fixedValues = False
|
|
self.y_action_automatic.setChecked(True)
|
|
self.y_action_fixed_span.setChecked(False)
|
|
self.update()
|
|
|
|
def contextMenuEvent(self, event):
|
|
self.action_set_fixed_start.setText(
|
|
f"Start ({format_frequency_chart(self.minFrequency)})")
|
|
self.action_set_fixed_stop.setText(
|
|
f"Stop ({format_frequency_chart(self.maxFrequency)})")
|
|
self.action_set_fixed_minimum_real.setText(
|
|
f"Minimum R ({self.minDisplayReal})")
|
|
self.action_set_fixed_maximum_real.setText(
|
|
f"Maximum R ({self.maxDisplayReal})")
|
|
self.action_set_fixed_minimum_imag.setText(
|
|
f"Minimum jX ({self.minDisplayImag})")
|
|
self.action_set_fixed_maximum_imag.setText(
|
|
f"Maximum jX ({self.maxDisplayImag})")
|
|
self.menu.exec_(event.globalPos())
|
|
|
|
def value(self, p: Datapoint) -> complex:
|
|
raise NotImplementedError()
|