From 214e18812b4c87fb856be700383f61a1c88554a2 Mon Sep 17 00:00:00 2001
From: "Ryan@SOLARIS-DAQ" <rtang@fsu.edu>
Date: Fri, 24 Mar 2023 18:07:48 -0400
Subject: [PATCH] added Coordinate Lable in Scope

---
 scope.cpp |  4 ++--
 scope.h   | 21 ++++++++++++++++++++-
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/scope.cpp b/scope.cpp
index b889cc5..9306c56 100644
--- a/scope.cpp
+++ b/scope.cpp
@@ -275,8 +275,8 @@ Scope::Scope(Digitizer2Gen **digi, unsigned int nDigi, ReadDataThread ** readDat
 
   //------------- Key binding
   rowID ++;
-  QLabel * lbhints = new QLabel("Type 'r' to restore view.", this);
-  layout->addWidget(lbhints, rowID, 0, 1, 3);
+  QLabel * lbhints = new QLabel("Type 'r' to restore view, '+/-' Zoom in/out, arrow key to pan.", this);
+  layout->addWidget(lbhints, rowID, 0, 1, 4);
   
   QLabel * lbinfo = new QLabel("Trace update every " + QString::number(updateTraceThread->GetWaitTimeSec()) + " sec.", this);
   lbinfo->setAlignment(Qt::AlignRight);
diff --git a/scope.h b/scope.h
index b3f2ccb..1eb07b4 100644
--- a/scope.h
+++ b/scope.h
@@ -6,6 +6,7 @@
 #include <QChart>
 #include <QChartView>
 #include <QSpinBox>
+#include <QLabel>
 #include <QPushButton>
 #include <QCheckBox>
 #include <QLineEdit>
@@ -59,6 +60,12 @@ public:
   TraceView(QChart * chart, QWidget * parent = nullptr): QChartView(chart, parent){
     m_isTouching = false;
     this->setRubberBand(QChartView::RectangleRubberBand);
+
+    m_coordinateLabel = new QLabel(this);
+    m_coordinateLabel->setStyleSheet("QLabel { color : black; }");
+    m_coordinateLabel->setVisible(false);
+    m_coordinateLabel->setAlignment(Qt::AlignTop | Qt::AlignLeft);
+    setMouseTracking(true);
   }
 
 protected:
@@ -74,14 +81,25 @@ protected:
     QChartView::mousePressEvent(event);
   }
   void mouseMoveEvent(QMouseEvent *event){
+
+    QPointF chartPoint = this->chart()->mapToValue(event->pos());
+    QString coordinateText = QString("x: %1, y: %2").arg(QString::number(chartPoint.x(), 'f', 0)).arg(QString::number(chartPoint.y(), 'f', 0));
+    m_coordinateLabel->setText(coordinateText);
+    m_coordinateLabel->move(event->pos() + QPoint(10, -10));
+    m_coordinateLabel->setVisible(true);
     if (m_isTouching) return;
     QChartView::mouseMoveEvent(event);
+
   }
   void mouseReleaseEvent(QMouseEvent *event){
     if (m_isTouching)  m_isTouching = false;
     chart()->setAnimationOptions(QChart::SeriesAnimations);
     QChartView::mouseReleaseEvent(event);
   }
+  void leaveEvent(QEvent *event) override {
+    m_coordinateLabel->setVisible(false);
+    QChartView::leaveEvent(event);
+  }
   void keyPressEvent(QKeyEvent *event){
     switch (event->key()) {
       case Qt::Key_Plus:  chart()->zoomIn(); break;
@@ -94,9 +112,10 @@ protected:
       default: QGraphicsView::keyPressEvent(event); break;
     }
   }
-
+  
 private:
   bool m_isTouching;
+  QLabel * m_coordinateLabel;
 };
 
 //^=======================================