File indexing completed on 2024-12-08 11:06:57

 /***************************************************************************
  *   Copyright (C) 2005 by David Saxton                                    *
  *   david@bluehaze.org                                                    *
  *                                                                         *
  *   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.                                   *
  ***************************************************************************/
 
 #include "oscilloscopeview.h"
 #include "oscilloscope.h"
 #include "oscilloscopedata.h"
 #include "probepositioner.h"
 #include "simulator.h"
 
 #include <KConfigGroup>
 #include <KLocalizedString>
 #include <KSharedConfig>
 // #include <k3popupmenu.h>
 
 #include <QCheckBox>
 #include <QCursor>
 #include <QLabel>
 #include <QMenu>
 #include <QPaintEvent>
 #include <QPainter>
 #include <QPixmap>
 #include <QScrollBar>
 #include <QTimer>
 
 #include <algorithm>
 #include <cmath>
 
 #include <ktechlab_debug.h>
 
 using namespace std;
 
 inline uint64_t min(uint64_t a, uint64_t b)
 {
     return a < b ? a : b;
 }
 
 OscilloscopeView::OscilloscopeView(QWidget *parent)
     : QFrame(parent /*, Qt::WNoAutoErase */)
     , b_needRedraw(true)
     , m_pixmap(nullptr)
     , m_fps(10)
     , m_sliderValueAtClick(-1)
     , m_clickOffsetPos(-1)
     , m_pSimulator(Simulator::self())
     , m_halfOutputHeight(0.0)
 {
     // KGlobal::config()->setGroup("Oscilloscope");
     KConfigGroup grOscill(KSharedConfig::openConfig(), "Oscilloscope");
     m_fps = grOscill.readEntry("FPS", 25);
 
     // setBackgroundMode(Qt::NoBackground); // 2018.12.07
     setBackgroundRole(QPalette::NoRole);
     setMouseTracking(true);
 
     m_updateViewTmr = new QTimer(this);
     connect(m_updateViewTmr, SIGNAL(timeout()), this, SLOT(updateViewTimeout()));
 }
 
 OscilloscopeView::~OscilloscopeView()
 {
     delete m_pixmap;
 }
 
 void OscilloscopeView::updateView()
 {
     if (m_updateViewTmr->isActive())
         return;
 
     m_updateViewTmr->setSingleShot(true);
     m_updateViewTmr->start(1000 / m_fps /*, true */);
 }
 
 void OscilloscopeView::updateViewTimeout()
 {
     b_needRedraw = true;
     repaint(/* false  - 2018.12.07 */);
     updateTimeLabel();
 }
 
 void OscilloscopeView::updateTimeLabel()
 {
     if (testAttribute(Qt::WA_UnderMouse)) {
         int x = mapFromGlobal(QCursor::pos()).x();
         double time = (double(Oscilloscope::self()->scrollTime()) / LOGIC_UPDATE_RATE) + (x / Oscilloscope::self()->pixelsPerSecond());
         Oscilloscope::self()->timeLabel->setText(QString::number(time, 'f', 6));
     } else
         Oscilloscope::self()->timeLabel->setText(QString());
 }
 
 void OscilloscopeView::resizeEvent(QResizeEvent *e)
 {
     delete m_pixmap;
     m_pixmap = new QPixmap(e->size());
     b_needRedraw = true;
     QFrame::resizeEvent(e);
 }
 
 void OscilloscopeView::mousePressEvent(QMouseEvent *event)
 {
     switch (event->button()) {
     case Qt::LeftButton: {
         event->accept();
         m_clickOffsetPos = event->pos().x();
         m_sliderValueAtClick = Oscilloscope::self()->horizontalScroll->value();
         setCursor(Qt::SizeAllCursor);
         return;
     }
 
     case Qt::RightButton: {
         event->accept();
 
         QMenu fpsMenu;
         // fpsMenu.insertTitle( i18n("Framerate")); // 2017.12.27 - use setTitle
         // fpsMenu.insertItem( i18n("Framerate"), 1 );   // 2018.12.07 - use actions
         // fpsMenu.setItemEnabled(1, false);
         {
             QAction *a = fpsMenu.addAction(i18n("Framerate"));
             a->setData(1);
             a->setEnabled(false);
         }
         // fpsMenu.insertSeparator(); // 2018.12.07
         fpsMenu.addSeparator();
 
         const int fps[] = {10, 25, 50, 75, 100};
 
         for (uint i = 0; i < 5; ++i) {
             const int num = fps[i];
             // fpsMenu.insertItem( i18n("%1 fps", QString::number(num)), num);   // 2018.12.07
             // fpsMenu.setItemChecked( num, num == m_fps);
             QAction *a = fpsMenu.addAction(i18n("%1 fps", QString::number(num)));
             a->setData(num);
         }
 
         connect(&fpsMenu, SIGNAL(triggered(QAction *)), this, SLOT(slotSetFrameRate(QAction *)));
         fpsMenu.exec(event->globalPos());
         return;
     }
 
     default: {
         QFrame::mousePressEvent(event);
         return;
     }
     }
 }
 
 void OscilloscopeView::mouseMoveEvent(QMouseEvent *event)
 {
     event->accept();
     updateTimeLabel();
 
     if (m_sliderValueAtClick != -1) {
         int dx = event->pos().x() - m_clickOffsetPos;
         int dTick = int(dx * Oscilloscope::self()->sliderTicksPerSecond() / Oscilloscope::self()->pixelsPerSecond());
         Oscilloscope::self()->horizontalScroll->setValue(m_sliderValueAtClick - dTick);
     }
 }
 
 void OscilloscopeView::mouseReleaseEvent(QMouseEvent *event)
 {
     if (m_sliderValueAtClick == -1)
         return QFrame::mouseReleaseEvent(event);
 
     event->accept();
     m_sliderValueAtClick = -1;
     setCursor(Qt::ArrowCursor);
 }
 
 void OscilloscopeView::slotSetFrameRate(QAction *action)
 {
     int fps = action->data().toInt();
     m_fps = fps;
     // KGlobal::config()->setGroup("Oscilloscope");
     KConfigGroup grOscill(KSharedConfig::openConfig(), "Oscilloscope");
     grOscill.writeEntry("FPS", m_fps);
 }
 
 // returns a % b
 static double lld_modulus(int64_t a, double b)
 {
     return double(a) - int64_t(a / b) * b;
 }
 
 void OscilloscopeView::paintEvent(QPaintEvent *e)
 {
     QRect r = e->rect();
 
     if (b_needRedraw) {
         updateOutputHeight();
         const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
 
         if (!m_pixmap) {
             qCWarning(KTL_LOG) << " unexpected null m_pixmap in " << this;
             return;
         }
 
         QPainter p;
         // m_pixmap->fill( paletteBackgroundColor());
         m_pixmap->fill(palette().color(backgroundRole()));
         const bool startSuccess = p.begin(m_pixmap);
         if ((!startSuccess) || (!p.isActive())) {
             qCWarning(KTL_LOG) << " painter is not active";
         }
 
         p.setClipRegion(e->region());
 
         // BEGIN Draw vertical marker lines
         const double divisions = 5.0;
         const double min_sep = 10.0;
 
         double spacing = pixelsPerSecond / (std::pow(divisions, std::floor(std::log(pixelsPerSecond / min_sep) / std::log(divisions))));
 
         // Pixels offset is the number of pixels that the view is scrolled along
         const int64_t pixelsOffset = int64_t(Oscilloscope::self()->scrollTime() * pixelsPerSecond / LOGIC_UPDATE_RATE);
         double linesOffset = -lld_modulus(pixelsOffset, spacing);
 
         int blackness = 256 - int(184.0 * spacing / (min_sep * divisions * divisions));
         p.setPen(QColor(blackness, blackness, blackness));
 
         for (double i = linesOffset; i <= frameRect().width(); i += spacing)
             p.drawLine(int(i), 1, int(i), frameRect().height() - 2);
 
         spacing *= divisions;
         linesOffset = -lld_modulus(pixelsOffset, spacing);
 
         blackness = 256 - int(184.0 * spacing / (min_sep * divisions * divisions));
         p.setPen(QColor(blackness, blackness, blackness));
 
         for (double i = linesOffset; i <= frameRect().width(); i += spacing)
             p.drawLine(int(i), 1, int(i), frameRect().height() - 2);
 
         spacing *= divisions;
         linesOffset = -lld_modulus(pixelsOffset, spacing);
 
         blackness = 256 - int(184.0);
         p.setPen(QColor(blackness, blackness, blackness));
 
         for (double i = linesOffset; i <= frameRect().width(); i += spacing)
             p.drawLine(int(i), 1, int(i), frameRect().height() - 2);
         // END Draw vertical marker lines
 
         drawLogicData(p);
         drawFloatingData(p);
 
         p.setPen(Qt::black);
         p.drawRect(frameRect());
 
         b_needRedraw = false;
     }
 
     // bitBlt( this, r.x(), r.y(), m_pixmap, r.x(), r.y(), r.width(), r.height()); // 2018.12.07
     QPainter p;
     const bool paintStarted = p.begin(this);
     if (!paintStarted) {
         qCWarning(KTL_LOG) << " failed to start painting ";
     }
     p.drawImage(r, m_pixmap->toImage(), r);
 }
 
 void OscilloscopeView::updateOutputHeight()
 {
     m_halfOutputHeight = int((Oscilloscope::self()->probePositioner->probeOutputHeight() - (probeArrowWidth / Oscilloscope::self()->numberOfProbes())) / 2) - 1;
 }
 
 void OscilloscopeView::drawLogicData(QPainter &p)
 {
     const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
 
     const LogicProbeDataMap::iterator end = Oscilloscope::self()->m_logicProbeDataMap.end();
     for (LogicProbeDataMap::iterator it = Oscilloscope::self()->m_logicProbeDataMap.begin(); it != end; ++it) {
         // When searching for the next logic value to display, we look along
         // until there is a recorded point which is at least one pixel along
         // If we are zoomed out far, there might be thousands of data points
         // between each pixel. It is time consuming searching for the next point
         // to display one at a time, so we record the average number of data points
         // between pixels ( = deltaAt / totalDeltaAt)
         int64_t deltaAt = 1;
         int totalDeltaAt = 1;
 
         LogicProbeData *probe = it.value();
 
         vector<LogicDataPoint> *data = probe->m_data;
         if (!data->size())
             continue;
 
         const int midHeight = Oscilloscope::self()->probePositioner->probePosition(probe);
         const int64_t timeOffset = Oscilloscope::self()->scrollTime();
 
         // Draw the horizontal line indicating the midpoint of our output
         p.setPen(QColor(228, 228, 228));
         p.drawLine(0, midHeight, width(), midHeight);
 
         // Set the pen colour according to the colour the user has selected for the probe
         p.setPen(probe->color());
 
         // The smallest time step that will display in our oscilloscope
         const int minTimeStep = int(LOGIC_UPDATE_RATE / pixelsPerSecond);
 
         int64_t at = probe->findPos(timeOffset);
         const int64_t maxAt = probe->m_data->size();
         int64_t prevTime = (*data)[at].time;
         int prevX = (at > 0) ? 0 : int((prevTime - timeOffset) * (pixelsPerSecond / LOGIC_UPDATE_RATE));
         bool prevHigh = (*data)[at].value;
         int prevY = midHeight + int(prevHigh ? -m_halfOutputHeight : +m_halfOutputHeight);
 
         while (at < maxAt) {
             // Search for the next pos which will show up at our zoom level
             int64_t previousAt = at;
             int64_t dAt = deltaAt / totalDeltaAt;
 
             while ((dAt > 1) && (at < maxAt) && ((int64_t((*data)[at].time) - prevTime) != minTimeStep)) {
                 // Search forwards until we overshoot
                 while (at < maxAt && (int64_t((*data)[at].time) - prevTime) < minTimeStep)
                     at += dAt;
                 dAt /= 2;
 
                 // Search backwards until we undershoot
                 while ((at < maxAt) && (int64_t((*data)[at].time) - prevTime) > minTimeStep) {
                     at -= dAt;
                     if (at < 0)
                         at = 0;
                 }
                 dAt /= 2;
             }
 
             // Possibly increment the value of at found by one (or more if this is the first go)
             while ((previousAt == at) || ((at < maxAt) && (int64_t((*data)[at].time) - prevTime) < minTimeStep))
                 at++;
 
             if (at >= maxAt)
                 break;
 
             // Update the average values
             deltaAt += at - previousAt;
             totalDeltaAt++;
 
             bool nextHigh = (*data)[at].value;
             if (nextHigh == prevHigh)
                 continue;
 
             int64_t nextTime = (*data)[at].time;
             int nextX = int((nextTime - timeOffset) * (pixelsPerSecond / LOGIC_UPDATE_RATE));
             int nextY = midHeight + int(nextHigh ? -m_halfOutputHeight : +m_halfOutputHeight);
 
             p.drawLine(prevX, prevY, nextX, prevY);
             p.drawLine(nextX, prevY, nextX, nextY);
 
             prevHigh = nextHigh;
             prevTime = nextTime;
             prevX = nextX;
             prevY = nextY;
 
             if (nextX > width())
                 break;
         };
 
         // If we could not draw right to the end; it is because we exceeded
         // maxAt
         if (prevX < width())
             p.drawLine(prevX, prevY, width(), prevY);
     }
 }
 
 #define v_to_y int(midHeight - (logarithmic ? ((v > 0) ? log(v / lowerAbsValue) : -log(-v / lowerAbsValue)) : v) * sf)
 
 void OscilloscopeView::drawFloatingData(QPainter &p)
 {
     const double pixelsPerSecond = Oscilloscope::self()->pixelsPerSecond();
 
     const FloatingProbeDataMap::iterator end = Oscilloscope::self()->m_floatingProbeDataMap.end();
     for (FloatingProbeDataMap::iterator it = Oscilloscope::self()->m_floatingProbeDataMap.begin(); it != end; ++it) {
         FloatingProbeData *probe = it.value();
         vector<float> *data = probe->m_data;
 
         if (!data->size())
             continue;
 
         bool logarithmic = probe->scaling() == FloatingProbeData::Logarithmic;
         double lowerAbsValue = probe->lowerAbsValue();
         double sf = m_halfOutputHeight / (logarithmic ? log(probe->upperAbsValue() / lowerAbsValue) : probe->upperAbsValue());
 
         const int midHeight = Oscilloscope::self()->probePositioner->probePosition(probe);
         const int64_t timeOffset = Oscilloscope::self()->scrollTime();
 
         // Draw the horizontal line indicating the midpoint of our output
         p.setPen(QColor(228, 228, 228));
         p.drawLine(0, midHeight, width(), midHeight);
 
         // Set the pen colour according to the colour the user has selected for the probe
         p.setPen(probe->color());
 
         int64_t at = probe->findPos(timeOffset);
         const int64_t atEnd = probe->m_data->size();
         if (at > atEnd)
             at = atEnd;
         int64_t prevTime = probe->toTime(at);
 
         double v = 0;
         if (at < atEnd) {
             v = (*data)[(at > 0) ? at : 0];
         }
         int prevY = v_to_y;
         int prevX = int((prevTime - timeOffset) * (pixelsPerSecond / LOGIC_UPDATE_RATE));
 
         while (at < atEnd - 1) {
             at++;
 
             uint64_t nextTime = prevTime + uint64_t(LOGIC_UPDATE_RATE * LINEAR_UPDATE_PERIOD);
 
             double v = (*data)[(at > 0) ? at : 0];
             int nextY = v_to_y;
             int nextX = int((nextTime - timeOffset) * (pixelsPerSecond / LOGIC_UPDATE_RATE));
 
             p.drawLine(prevX, prevY, nextX, nextY);
 
             prevTime = nextTime;
             prevX = nextX;
             prevY = nextY;
 
             if (nextX > width())
                 break;
         };
 
         // If we could not draw right to the end; it is because we exceeded
         // maxAt
         if (prevX < width())
             p.drawLine(prevX, prevY, width(), prevY);
     }
 }
 
 #include "moc_oscilloscopeview.cpp"