From 2b0f2ae36ea62b406cd0b603786306628bd48fae Mon Sep 17 00:00:00 2001
From: Kizarm <mrazik@volny.cz>
Date: Thu, 14 Nov 2024 15:12:23 +0100
Subject: [PATCH] continual indicator

---
 V203/usb/scope/software/displaywidget.cpp | 13 +++++++++++++
 V203/usb/scope/software/displaywidget.h   |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/V203/usb/scope/software/displaywidget.cpp b/V203/usb/scope/software/displaywidget.cpp
index 4a6704b..159fd32 100644
--- a/V203/usb/scope/software/displaywidget.cpp
+++ b/V203/usb/scope/software/displaywidget.cpp
@@ -19,6 +19,7 @@ static const double ChannelsSteps [] = {
 static constexpr double   REF_Y  = 3.3;                 // maximum napětí převodníku
 static constexpr double   MAX_Y  = double (1 << 12);    // 12. bit rozlišení - 4096 steps
 static constexpr double   HALF_Y = 0.5 * MAX_Y;
+static constexpr double   QSCL_Y = 0.5 * HALF_Y;
 static constexpr double   STEP_Y = REF_Y / MAX_Y;       // jeden krok ve Voltech
 static constexpr unsigned T_SIZE = 1u << 10;
 static constexpr unsigned T_MASK = T_SIZE - 1u;
@@ -40,6 +41,7 @@ DisplayWidget::DisplayWidget(QWidget * p) : QWidget(p), pcol(), ACopy(), BCopy()
     for (QPointF & e : ChA) { const QPointF p (n++, 0); e = p; }
     n = 0;
     for (QPointF & e : ChB) { const QPointF p (n++, 0); e = p; }
+    m_continual = false;
 }
 DisplayWidget::~DisplayWidget() {
 }
@@ -158,6 +160,7 @@ void DisplayWidget::resizeEvent(QResizeEvent * event) {
 void DisplayWidget::paintEvent(QPaintEvent * event) {
   QPainter p (this);
   p.drawImage(event->rect(), background);
+  drawCurrent(p);
   QPen pa (pcol.colA, 2);
   QPen pb (pcol.colB, 2);
   p.setPen(pb);
@@ -169,6 +172,14 @@ void DisplayWidget::paintEvent(QPaintEvent * event) {
   ma.translate(0, m_offset.a - HALF_Y);
   p.drawPolyline (ma.map(ChA));
 }
+void DisplayWidget::drawCurrent(QPainter & p) {
+  if (!m_continual) return;
+  const QPen pen (QColor(192,192,192));
+  p.setPen (pen);
+  QLineF vl (QPointF(m_timeCount, -QSCL_Y), QPointF(m_timeCount, +QSCL_Y));
+  p.drawLine (m_forward.map (vl));    // Stávající poloha v kontinuálním módu
+}
+
 void DisplayWidget::setTrigger(TrigerSettings * ts) {
   m_ts = ts;
 }
@@ -184,6 +195,7 @@ void DisplayWidget::reloadData () {
   const size_t Amin = Alen < T_SIZE ? Alen : T_SIZE;
   const size_t Bmin = Blen < T_SIZE ? Blen : T_SIZE;
   if ((Alen == 1u) and (Blen == 1u)) { // kontinuální mód
+    m_continual = true;
     const QPointF pta (m_timeCount, ACopy [0]), ptb (m_timeCount, BCopy [0]);
     ChA[m_timeCount] = pta;
     ChB[m_timeCount] = ptb;
@@ -191,6 +203,7 @@ void DisplayWidget::reloadData () {
     m_timeCount &= T_MASK;
     return;
   }
+  m_continual = false;
   for (unsigned n=0u; n<Amin; n++) {
     QPointF & p = ChA [n];
     p.setY (ACopy [n]);
diff --git a/V203/usb/scope/software/displaywidget.h b/V203/usb/scope/software/displaywidget.h
index 97177b5..69d4bd0 100644
--- a/V203/usb/scope/software/displaywidget.h
+++ b/V203/usb/scope/software/displaywidget.h
@@ -45,6 +45,7 @@ class DisplayWidget : public QWidget {
     MARKER_VOLT_B,
   }          marker_type;
   unsigned   m_timeCount;
+  bool       m_continual;
   public:
     explicit DisplayWidget (QWidget * p);
     virtual ~DisplayWidget ();
@@ -68,6 +69,7 @@ class DisplayWidget : public QWidget {
   signals:
     void SettingsChanged (int n);
   protected:
+    void drawCurrent    (QPainter & p);
     void drawBackground ();
     void reloadData     ();
     void reloadMatrix   (const QSize & sz);