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AbstractWaterfall.cpp
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/* -*- c++ -*- */
/* + + + This Software is released under the "Simplified BSD License" + + +
* Copyright 2010 Moe Wheatley. All rights reserved.
* Copyright 2011-2013 Alexandru Csete OZ9AEC
* Copyright 2018 Gonzalo José Carracedo Carballal - Minimal modifications for integration
* Copyright 2023-2024 Sultan Qasim Khan - Abstract class for OpenGL and QPainter waterfalls
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Moe Wheatley ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Moe Wheatley OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of Moe Wheatley.
*/
#include <cmath>
#include <QColor>
#include <QDateTime>
#include <QDebug>
#include <QFont>
#include <QPainter>
#include <QtGlobal>
#include <QToolTip>
#include <QDebug>
#include <cstring>
#include "AbstractWaterfall.h"
#include "SuWidgetsHelpers.h"
// Comment out to enable plotter debug messages
//#define PLOTTER_DEBUG
#define STATUS_TIP \
"Click, drag or scroll on spectrum to tune. " \
"Drag and scroll X and Y axes for pan and zoom. " \
"Drag filter edges to adjust filter."
///////////////////////////// AbstractWaterfall ////////////////////////////////////////
AbstractWaterfall::AbstractWaterfall(QWidget *parent) : QOpenGLWidget(parent)
{
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
setFocusPolicy(Qt::StrongFocus);
setAttribute(Qt::WA_PaintOnScreen,false);
setAutoFillBackground(false);
setAttribute(Qt::WA_OpaquePaintEvent, false);
setAttribute(Qt::WA_NoSystemBackground, true);
setMouseTracking(true);
setTooltipsEnabled(false);
setStatusTip(tr(STATUS_TIP));
m_PeakHoldActive = false;
m_PeakHoldValid = false;
m_FftCenter = 0;
m_CenterFreq = 144500000;
m_DemodCenterFreq = 144500000;
m_DemodHiCutFreq = 5000;
m_DemodLowCutFreq = -5000;
m_FLowCmin = -25000;
m_FLowCmax = -1000;
m_FHiCmin = 1000;
m_FHiCmax = 25000;
m_symetric = true;
m_ClickResolution = 100;
m_FilterClickResolution = 100;
m_CursorCaptureDelta = CUR_CUT_DELTA;
m_FilterBoxEnabled = true;
m_CenterLineEnabled = true;
m_BookmarksEnabled = true;
m_Locked = false;
m_freqDragLocked = false;
m_Span = 96000;
m_SampleFreq = 96000;
m_HorDivs = 12;
m_VerDivs = 6;
m_PandMaxdB = m_WfMaxdB = 0.f;
m_PandMindB = m_WfMindB = -150.f;
m_CumWheelDelta = 0;
m_FreqUnits = 1000000;
m_CursorCaptured = NOCAP;
m_Running = false;
m_DrawOverlay = true;
m_2DPixmap = QPixmap(0,0);
m_OverlayPixmap = QPixmap(0,0);
m_Size = QSize(0,0);
m_SpectrumPlotHeight = 0;
m_WaterfallHeight = 0;
m_GrabPosition = 0;
m_Percent2DScreen = 30; //percent of screen used for 2D display
m_VdivDelta = 30;
m_HdivDelta = 70;
m_ZeroPoint = 0;
m_dBPerUnit = 1;
m_FreqDigits = 3;
m_Peaks = QMap<int,int>();
setPeakDetection(false, 2);
m_PeakHoldValid = false;
setFftPlotColor(QColor(0xFF,0xFF,0xFF,0xFF));
setFftBgColor(QColor(PLOTTER_BGD_COLOR));
setFftAxesColor(QColor(PLOTTER_GRID_COLOR));
setFilterBoxColor(QColor(PLOTTER_FILTER_BOX_COLOR));
setTimeStampColor(QColor(0xFF,0xFF,0xFF,0xFF));
setFftFill(false);
// always update waterfall
tlast_wf_ms = 0;
msec_per_wfline = 0;
wf_span = 0;
fft_rate = 15;
m_fftData = nullptr;
m_fftDataSize = 0;
m_infoTextColor = m_FftTextColor;
}
AbstractWaterfall::~AbstractWaterfall()
{
}
QSize AbstractWaterfall::minimumSizeHint() const
{
return QSize(50, 50);
}
QSize AbstractWaterfall::sizeHint() const
{
return QSize(180, 180);
}
void AbstractWaterfall::mouseMoveEvent(QMouseEvent* event)
{
QPoint pt = event->pos();
/* mouse enter / mouse leave events */
if (m_OverlayPixmap.rect().contains(pt))
{
//is in Overlay bitmap region
if (event->buttons() == Qt::NoButton)
{
bool onTag = false;
if(pt.y() < 15 * 10) // FIXME
{
for(int i = 0; i < m_BookmarkTags.size() && !onTag; i++)
{
if (m_BookmarkTags[i].first.contains(event->pos()))
onTag = true;
}
}
// if no mouse button monitor grab regions and change cursor icon
if (onTag)
{
setCursor(QCursor(Qt::PointingHandCursor));
m_CursorCaptured = BOOKMARK;
}
else if (isPointCloseTo(pt.x(), m_DemodFreqX, m_CursorCaptureDelta))
{
// in move demod box center frequency region
if (CENTER != m_CursorCaptured)
setCursor(QCursor(Qt::SizeHorCursor));
m_CursorCaptured = CENTER;
if (m_TooltipsEnabled)
QToolTip::showText(
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
event->globalPosition().toPoint(),
#else
event->globalPos(),
#endif
QString("Demod: %1 kHz")
.arg(m_DemodCenterFreq/1.e3f, 0, 'f', 3),
this);
}
else if (isPointCloseTo(pt.x(), m_DemodHiCutFreqX, m_CursorCaptureDelta))
{
// in move demod hicut region
if (RIGHT != m_CursorCaptured)
setCursor(QCursor(Qt::SizeFDiagCursor));
m_CursorCaptured = RIGHT;
if (m_TooltipsEnabled)
QToolTip::showText(
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
event->globalPosition().toPoint(),
#else
event->globalPos(),
#endif
QString("High cut: %1 Hz")
.arg(m_DemodHiCutFreq),
this);
}
else if (isPointCloseTo(pt.x(), m_DemodLowCutFreqX, m_CursorCaptureDelta))
{
// in move demod lowcut region
if (LEFT != m_CursorCaptured)
setCursor(QCursor(Qt::SizeBDiagCursor));
m_CursorCaptured = LEFT;
if (m_TooltipsEnabled)
QToolTip::showText(
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
event->globalPosition().toPoint(),
#else
event->globalPos(),
#endif
QString("Low cut: %1 Hz")
.arg(m_DemodLowCutFreq),
this);
}
else if (isPointCloseTo(pt.x(), m_YAxisWidth/2, m_YAxisWidth/2))
{
if (YAXIS != m_CursorCaptured)
setCursor(QCursor(Qt::OpenHandCursor));
m_CursorCaptured = YAXIS;
if (m_TooltipsEnabled)
QToolTip::hideText();
}
else if (isPointCloseTo(pt.y(), m_XAxisYCenter, m_CursorCaptureDelta+5))
{
if (XAXIS != m_CursorCaptured)
setCursor(QCursor(Qt::OpenHandCursor));
m_CursorCaptured = XAXIS;
if (m_TooltipsEnabled)
QToolTip::hideText();
}
else
{ //if not near any grab boundaries
if (NOCAP != m_CursorCaptured)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
}
if (m_TooltipsEnabled)
QToolTip::showText(
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
event->globalPosition().toPoint(),
#else
event->globalPos(),
#endif
QString("F: %1 kHz")
.arg(freqFromX(pt.x())/1.e3f, 0, 'f', 3),
this);
}
m_GrabPosition = 0;
}
}
else
{
// not in Overlay region
if (event->buttons() == Qt::NoButton)
{
if (NOCAP != m_CursorCaptured)
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
m_GrabPosition = 0;
}
if (m_TooltipsEnabled)
{
QDateTime tt;
tt.setMSecsSinceEpoch(msecFromY(pt.y()));
QToolTip::showText(
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
event->globalPosition().toPoint(),
#else
event->globalPos(),
#endif
QString("%1\n%2 kHz")
.arg(tt.toString("yyyy.MM.dd hh:mm:ss.zzz"))
.arg(freqFromX(pt.x())/1.e3f, 0, 'f', 3),
this);
}
}
// process mouse moves while in cursor capture modes
if (YAXIS == m_CursorCaptured)
{
if (event->buttons() & Qt::LeftButton)
{
setCursor(QCursor(Qt::ClosedHandCursor));
// move Y scale up/down
float delta_px = m_Yzero - pt.y();
float delta_db = delta_px * fabs(m_PandMindB - m_PandMaxdB) /
(float)m_SpectrumPlotHeight;
m_PandMindB -= delta_db;
m_PandMaxdB -= delta_db;
if (out_of_range(m_PandMindB, m_PandMaxdB))
{
m_PandMindB += delta_db;
m_PandMaxdB += delta_db;
}
else
{
emit pandapterRangeChanged(m_PandMindB, m_PandMaxdB);
updateOverlay();
m_PeakHoldValid = false;
m_Yzero = pt.y();
}
}
}
else if (XAXIS == m_CursorCaptured)
{
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
if (event->buttons() & (Qt::LeftButton | Qt::MiddleButton))
#else
if (event->buttons() & (Qt::LeftButton | Qt::MidButton))
#endif // QT_VERSION
{
setCursor(QCursor(Qt::ClosedHandCursor));
// pan viewable range or move center frequency
int delta_px = m_Xzero - pt.x();
qint64 delta_hz = delta_px * m_Span / m_Size.width();
if ((event->buttons() & m_freqDragBtn) ||
(event->modifiers() & Qt::ShiftModifier))
{
if (!m_Locked && !m_freqDragLocked) {
qint64 centerFreq = boundCenterFreq(roundFreq(
m_CenterFreq + delta_hz, m_ClickResolution));
delta_hz = centerFreq - m_CenterFreq;
m_CenterFreq += delta_hz;
m_DemodCenterFreq += delta_hz;
// Scroll the spectrum only if data flow is stopped.
// When running, the hardware may be delayed in retuning, so some new
// PSDs at the old centre frequency may still arrive, causing visual
// jumping/shaking of the spectrum.
if (!m_Running)
m_tentativeCenterFreq += delta_hz;
if (delta_hz != 0)
emit newCenterFreq(m_CenterFreq);
}
} else {
setFftCenterFreq(m_FftCenter + delta_hz);
}
if (delta_hz != 0) {
updateOverlay();
m_PeakHoldValid = false;
m_Xzero = pt.x();
}
}
}
else if (LEFT == m_CursorCaptured)
{
// moving in demod lowcut region
if (event->buttons() & (Qt::LeftButton | Qt::RightButton))
{
// moving in demod lowcut region with left button held
if (m_GrabPosition != 0)
{
m_DemodLowCutFreq = freqFromX(pt.x() - m_GrabPosition ) - m_DemodCenterFreq;
m_DemodLowCutFreq = roundFreq(m_DemodLowCutFreq, m_FilterClickResolution);
if (m_symetric && (event->buttons() & Qt::LeftButton)) // symetric adjustment
{
m_DemodHiCutFreq = -m_DemodLowCutFreq;
}
clampDemodParameters();
emit newFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
updateOverlay();
}
else
{
// save initial grab postion from m_DemodFreqX
m_GrabPosition = pt.x()-m_DemodLowCutFreqX;
}
}
else if (event->buttons() & ~Qt::NoButton)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
}
}
else if (RIGHT == m_CursorCaptured)
{
// moving in demod highcut region
if (event->buttons() & (Qt::LeftButton | Qt::RightButton))
{
// moving in demod highcut region with right button held
if (m_GrabPosition != 0)
{
m_DemodHiCutFreq = freqFromX( pt.x()-m_GrabPosition ) - m_DemodCenterFreq;
m_DemodHiCutFreq = roundFreq(m_DemodHiCutFreq, m_FilterClickResolution);
if (m_symetric && (event->buttons() & Qt::LeftButton)) // symetric adjustment
{
m_DemodLowCutFreq = -m_DemodHiCutFreq;
}
clampDemodParameters();
emit newFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
updateOverlay();
}
else
{
// save initial grab postion from m_DemodFreqX
m_GrabPosition = pt.x() - m_DemodHiCutFreqX;
}
}
else if (event->buttons() & ~Qt::NoButton)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
}
}
else if (CENTER == m_CursorCaptured)
{
// moving inbetween demod lowcut and highcut region
if (event->buttons() & Qt::LeftButton)
{ // moving inbetween demod lowcut and highcut region with left button held
if (m_GrabPosition != 0)
{
if (!m_Locked) {
m_DemodCenterFreq = roundFreq(freqFromX(pt.x() - m_GrabPosition),
m_ClickResolution );
emit newDemodFreq(m_DemodCenterFreq,
m_DemodCenterFreq - m_CenterFreq);
updateOverlay();
m_PeakHoldValid = false;
}
}
else
{
// save initial grab postion from m_DemodFreqX
m_GrabPosition = pt.x() - m_DemodFreqX;
}
}
else if (event->buttons() & ~Qt::NoButton)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
}
}
else
{
// cursor not captured
m_GrabPosition = 0;
}
if (!this->rect().contains(pt))
{
if (NOCAP != m_CursorCaptured)
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
}
}
// Called by QT when screen needs to be redrawn
void AbstractWaterfall::paintEvent(QPaintEvent *ev)
{
QOpenGLWidget::paintEvent(ev);
QPainter painter(this);
qint64 StartFreq = m_CenterFreq + m_FftCenter - m_Span / 2;
qint64 EndFreq = StartFreq + m_Span;
painter.setRenderHint(QPainter::Antialiasing);
painter.drawPixmap(0, 0, m_2DPixmap);
this->drawWaterfall(painter);
// Draw named channel cutoffs
if (m_channelsEnabled) {
for (auto i = m_channelSet.find(StartFreq); i != m_channelSet.cend(); ++i) {
auto p = i.value();
int x_fCenter = xFromFreq(p->frequency);
int x_fMin = xFromFreq(p->frequency + p->lowFreqCut);
int x_fMax = xFromFreq(p->frequency + p->highFreqCut);
if (EndFreq < p->frequency + p->lowFreqCut)
break;
WFHelpers::drawChannelCutoff(
painter,
m_SpectrumPlotHeight,
x_fMin,
x_fMax,
x_fCenter,
p->markerColor,
p->cutOffColor,
!p->bandLike);
}
}
// Draw demod filter box
if (m_FilterBoxEnabled) {
this->drawFilterBox(painter, m_SpectrumPlotHeight);
this->drawFilterCutoff(painter, m_SpectrumPlotHeight);
}
if (m_TimeStampsEnabled)
paintTimeStamps(
painter,
QRect(2, m_SpectrumPlotHeight, this->width(), this->height()));
}
int AbstractWaterfall::getNearestPeak(QPoint pt)
{
QMap<int, int>::const_iterator i = m_Peaks.lowerBound(pt.x() - PEAK_CLICK_MAX_H_DISTANCE);
QMap<int, int>::const_iterator upperBound = m_Peaks.upperBound(pt.x() + PEAK_CLICK_MAX_H_DISTANCE);
float dist = 1.0e10;
int best = -1;
for ( ; i != upperBound; i++)
{
int x = i.key();
int y = i.value();
if (abs(y - pt.y()) > PEAK_CLICK_MAX_V_DISTANCE)
continue;
float d = powf(y - pt.y(), 2) + powf(x - pt.x(), 2);
if (d < dist)
{
dist = d;
best = x;
}
}
return best;
}
/** Set waterfall span in milliseconds */
void AbstractWaterfall::setWaterfallSpan(quint64 span_ms)
{
qreal dpi_factor = isHdpiAware() ? screen()->devicePixelRatio() : 1;
wf_span = span_ms;
if (m_WaterfallHeight > 0)
msec_per_wfline = wf_span / (m_WaterfallHeight * dpi_factor);
clearWaterfall();
}
/** Get waterfall time resolution in milleconds / line. */
double AbstractWaterfall::getWfTimeRes()
{
if (msec_per_wfline)
return msec_per_wfline;
else
return 1000.0 / fft_rate; // Auto mode
}
void AbstractWaterfall::setFftRate(int rate_hz)
{
fft_rate = rate_hz;
clearWaterfall();
}
// Called when a mouse button is pressed
void AbstractWaterfall::mousePressEvent(QMouseEvent * event)
{
QPoint pt = event->pos();
if (NOCAP == m_CursorCaptured)
{
if (isPointCloseTo(pt.x(), m_DemodFreqX, m_CursorCaptureDelta))
{
// move demod box center frequency region
m_CursorCaptured = CENTER;
m_GrabPosition = pt.x() - m_DemodFreqX;
}
else if (isPointCloseTo(pt.x(), m_DemodLowCutFreqX, m_CursorCaptureDelta))
{
// filter low cut
m_CursorCaptured = LEFT;
m_GrabPosition = pt.x() - m_DemodLowCutFreqX;
}
else if (isPointCloseTo(pt.x(), m_DemodHiCutFreqX, m_CursorCaptureDelta))
{
// filter high cut
m_CursorCaptured = RIGHT;
m_GrabPosition = pt.x() - m_DemodHiCutFreqX;
}
else
{
if (event->buttons() == Qt::LeftButton)
{
if (!m_Locked) {
int best = -1;
if (m_PeakDetection > 0)
best = getNearestPeak(pt);
if (best != -1)
m_DemodCenterFreq = freqFromX(best);
else
m_DemodCenterFreq = roundFreq(freqFromX(pt.x()), m_ClickResolution);
// if cursor not captured set demod frequency and start demod box capture
emit newDemodFreq(m_DemodCenterFreq, m_DemodCenterFreq - m_CenterFreq);
// save initial grab postion from m_DemodFreqX
// setCursor(QCursor(Qt::CrossCursor));
m_CursorCaptured = CENTER;
m_GrabPosition = 1;
updateOverlay();
}
}
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
else if (event->buttons() == Qt::MiddleButton)
#else
else if (event->buttons() == Qt::MidButton)
#endif // QT_VERSION
{
if (!m_Locked && !m_freqDragLocked) {
// set center freq
m_CenterFreq
= boundCenterFreq(roundFreq(freqFromX(pt.x()), m_ClickResolution));
m_DemodCenterFreq = m_CenterFreq;
emit newCenterFreq(m_CenterFreq);
emit newDemodFreq(m_DemodCenterFreq, m_DemodCenterFreq - m_CenterFreq);
updateOverlay();
}
}
else if (event->buttons() == Qt::RightButton)
{
// reset frequency zoom
resetHorizontalZoom();
updateOverlay();
}
}
}
else
{
if (m_CursorCaptured == YAXIS)
// get ready for moving Y axis
m_Yzero = pt.y();
else if (m_CursorCaptured == XAXIS)
{
m_Xzero = pt.x();
if (event->buttons() == Qt::RightButton)
{
// reset frequency zoom
resetHorizontalZoom();
updateOverlay();
}
}
else if (m_CursorCaptured == BOOKMARK)
{
if (!m_Locked) {
for (int i = 0; i < m_BookmarkTags.size(); i++)
{
if (m_BookmarkTags[i].first.contains(event->pos()))
{
BookmarkInfo info = m_BookmarkTags[i].second;
if (!info.modulation.isEmpty()) {
emit newModulation(info.modulation);
}
m_DemodCenterFreq = info.frequency;
emit newDemodFreq(m_DemodCenterFreq, m_DemodCenterFreq - m_CenterFreq);
if (info.bandwidth() != 0) {
emit newFilterFreq(info.lowFreqCut, info.highFreqCut);
}
break;
}
}
}
}
}
}
void AbstractWaterfall::mouseReleaseEvent(QMouseEvent * event)
{
QPoint pt = event->pos();
if (!m_OverlayPixmap.rect().contains(pt))
{
// not in Overlay region
if (NOCAP != m_CursorCaptured)
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NOCAP;
m_GrabPosition = 0;
}
else
{
if (YAXIS == m_CursorCaptured)
{
setCursor(QCursor(Qt::OpenHandCursor));
m_Yzero = -1;
}
else if (XAXIS == m_CursorCaptured)
{
setCursor(QCursor(Qt::OpenHandCursor));
m_Xzero = -1;
}
}
}
// Make a single zoom step on the X axis.
void AbstractWaterfall::zoomStepX(float step, int x)
{
// calculate new range shown on FFT, at least 5 bins
qint64 new_range = qBound(m_fftDataSize > 0 ? 5.0 * m_SampleFreq / m_fftDataSize : 10.0,
(double)(m_Span) * step,
(double)(m_SampleFreq));
// Frequency where event occured is kept fixed under mouse
double ratio = (double)x / (double)m_Size.width();
qint64 fixed_hz = freqFromX(x);
qint64 f_min = (fixed_hz - ratio * new_range) + 0.5; // +0.5 for rounding
qint64 f_max = f_min + new_range;
// Keep edges of plot in valid frequency range
qint64 min_limit = m_CenterFreq - m_SampleFreq/2;
qint64 max_limit = m_CenterFreq + m_SampleFreq/2;
if (f_min < min_limit) {
f_min = min_limit;
f_max = f_min + new_range;
} else if (f_max > max_limit) {
f_max = max_limit;
f_min = f_max - new_range;
}
qint64 fc = (f_min + f_max) / 2;
updateOverlay();
// Explicitly set m_Span instead of calling setSpanFreq(), which also calls
// setFftCenterFreq() and updateOverlay() internally. Span needs to be set
// before frequency limits can be checked in setFftCenterFreq().
m_Span = new_range;
setFftCenterFreq(fc - m_CenterFreq);
emit newZoomLevel(getZoomLevel());
m_PeakHoldValid = false;
}
// Zoom on X axis (absolute level)
void AbstractWaterfall::zoomOnXAxis(float level)
{
float current_level = (float)m_SampleFreq / (float)m_Span;
zoomStepX(current_level / level, xFromFreq(m_DemodCenterFreq));
}
// Called when a mouse wheel is turned
void AbstractWaterfall::wheelEvent(QWheelEvent * event)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
QPointF pt = event->position();
#else
QPointF pt = event->pos();
#endif // QT_VERSION
// delta is in eigths of a degree, 15 degrees is one step
double numSteps = event->angleDelta().y() / (8.0 * 15.0);
if (m_CursorCaptured == YAXIS)
{
// Vertical zoom. Wheel down: zoom out, wheel up: zoom in
// During zoom we try to keep the point (dB or kHz) under the cursor fixed
qreal zoom_fac = pow(0.9, numSteps);
qreal ratio = pt.y() / m_SpectrumPlotHeight;
qreal db_range = m_PandMaxdB - m_PandMindB;
qreal y_range = m_SpectrumPlotHeight;
qreal db_per_pix = db_range / y_range;
qreal fixed_db = m_PandMaxdB - pt.y() * db_per_pix;
db_range = qBound(
10.,
db_range * zoom_fac,
SCAST(qreal, FFT_MAX_DB - FFT_MIN_DB));
m_PandMaxdB = fixed_db + ratio * db_range;
if (m_PandMaxdB > FFT_MAX_DB)
m_PandMaxdB = FFT_MAX_DB;
m_PandMindB = m_PandMaxdB - db_range;
if (m_PandMindB < FFT_MIN_DB)
m_PandMindB = FFT_MIN_DB;
m_PeakHoldValid = false;
emit pandapterRangeChanged(m_PandMindB, m_PandMaxdB);
}
else if (m_CursorCaptured == XAXIS)
{
zoomStepX(pow(0.9, numSteps), pt.x());
}
else if (event->modifiers() & Qt::ControlModifier)
{
// filter width
m_DemodLowCutFreq -= numSteps * m_ClickResolution;
m_DemodHiCutFreq += numSteps * m_ClickResolution;
clampDemodParameters();
emit newFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
}
else if (event->modifiers() & Qt::ShiftModifier)
{
if (!m_Locked) {
// filter shift
m_DemodLowCutFreq += numSteps * m_ClickResolution;
m_DemodHiCutFreq += numSteps * m_ClickResolution;
clampDemodParameters();
emit newFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
}
}
else
{
if (!m_Locked) {
// small steps will be lost by roundFreq, let them accumulate
m_CumWheelDelta += event->angleDelta().y();
if (abs(m_CumWheelDelta) < 8*15)
return;
numSteps = m_CumWheelDelta / (8.0 * 15.0);
// inc/dec demod frequency
m_DemodCenterFreq += (numSteps * m_ClickResolution);
m_DemodCenterFreq = roundFreq(m_DemodCenterFreq, m_ClickResolution );
emit newDemodFreq(m_DemodCenterFreq, m_DemodCenterFreq-m_CenterFreq);
}
}
updateOverlay();
m_CumWheelDelta = 0;
}
// Called when screen size changes so must recalculate bitmaps
void AbstractWaterfall::resizeEvent(QResizeEvent* event)
{
qreal dpi_factor = screen()->devicePixelRatio();
// mandatory to call for QOpenGLWidget to resize framebuffer
if (event != nullptr)
QOpenGLWidget::resizeEvent(event);
if (!size().isValid())
return;
if (m_Size != size())
{
// if changed, resize pixmaps to new screensize
m_Size = size();
m_SpectrumPlotHeight = m_Percent2DScreen * m_Size.height() / 100;
m_WaterfallHeight = m_Size.height() - m_SpectrumPlotHeight;
m_OverlayPixmap = QPixmap(m_Size.width() * dpi_factor,
m_SpectrumPlotHeight * dpi_factor);
m_OverlayPixmap.setDevicePixelRatio(dpi_factor);
m_OverlayPixmap.fill(Qt::black);
m_PeakHoldValid = false;
if (wf_span > 0)
msec_per_wfline = wf_span / (m_WaterfallHeight * (isHdpiAware() ? dpi_factor : 1));
}
updateOverlay();
}
void AbstractWaterfall::paintTimeStamps(
QPainter &painter,
QRect const &where)
{
QFontMetrics metrics(m_Font);
int y = where.y();
int textWidth;
int textHeight = metrics.height();
int items = 0;
int leftSpacing = 0;
qreal dpi_factor = isHdpiAware() ? screen()->devicePixelRatio() : 1;
auto it = m_TimeStamps.begin();
painter.setFont(m_Font);
y += m_TimeStampCounter / dpi_factor;
if (m_TimeStampMaxHeight < where.height())
m_TimeStampMaxHeight = where.height();
painter.setPen(m_TimeStampColor);
#if QT_VERSION >= QT_VERSION_CHECK(5, 11, 0)
leftSpacing = metrics.horizontalAdvance("00:00:00.000");
#else
leftSpacing = metrics.width("00:00:00.000");
#endif // QT_VERSION_CHECK
while (y < m_TimeStampMaxHeight + textHeight && it != m_TimeStamps.end()) {
QString const &timeStampText =
m_TimeStampsUTC ? it->utcTimeStampText : it->timeStampText;
#if QT_VERSION >= QT_VERSION_CHECK(5, 11, 0)
textWidth = metrics.horizontalAdvance(timeStampText);
#else
textWidth = metrics.width(it->timeStampText);
#endif // QT_VERSION_CHECK
if (it->marker) {
painter.drawText(
where.x() + where.width() - textWidth - 2,
y - 2,
timeStampText);
painter.drawLine(where.x() + leftSpacing, y, where.width() - 1, y);
} else {
painter.drawText(where.x(), y - 2, timeStampText);
painter.drawLine(where.x(), y, textWidth + where.x(), y);
}
y += it->counter / dpi_factor;
++it;
++items;
}
// TimeStamps from here could not be painted due to geometry restrictions.
// we silently discard them.
while (items < m_TimeStamps.size())
m_TimeStamps.removeLast();
}
void
AbstractWaterfall::drawChannelBoxAndCutoff(
QPainter &painter,
int h,
qint64 fMin,
qint64 fMax,
qint64 fCenter,
QColor boxColor,
QColor markerColor,
QColor cutOffColor,
QString text,
QColor textColor)
{
int x_fCenter = xFromFreq(fCenter);
int x_fMin = xFromFreq(fMin);
int x_fMax = xFromFreq(fMax);
WFHelpers::drawChannelBox(
painter,
h,
x_fMin,
x_fMax,
x_fCenter,
boxColor,
markerColor,
text,
textColor);
WFHelpers::drawChannelCutoff(
painter,
h,
x_fMin,
x_fMax,
x_fCenter,
markerColor,
cutOffColor);
}
void
AbstractWaterfall::drawFilterBox(QPainter &painter, int h)
{
m_DemodFreqX = xFromFreq(m_DemodCenterFreq);
m_DemodLowCutFreqX = xFromFreq(m_DemodCenterFreq + m_DemodLowCutFreq);
m_DemodHiCutFreqX = xFromFreq(m_DemodCenterFreq + m_DemodHiCutFreq);
WFHelpers::drawChannelBox(
painter,
h,
m_DemodLowCutFreqX,
m_DemodHiCutFreqX,
m_DemodFreqX,
m_FilterBoxColor,
QColor(PLOTTER_FILTER_LINE_COLOR),
"",
QColor());
}