From 93dc4722b5f56f7e147b24bd1264fb7044ea5b62 Mon Sep 17 00:00:00 2001
From: Mark Watkins <jedimark@users.sourceforge.net>
Date: Mon, 21 Jul 2014 17:14:02 +1000
Subject: [PATCH] Show context based information in above graph text while alt
 is pressed. Clean up location of mouse time calculation

---
 sleepyhead/Graphs/gGraph.cpp     | 20 ++++++++++++++++++++
 sleepyhead/Graphs/gGraph.h       |  3 +++
 sleepyhead/Graphs/gGraphView.h   |  7 +++++++
 sleepyhead/Graphs/gLineChart.cpp | 26 +++++++++++---------------
 4 files changed, 41 insertions(+), 15 deletions(-)

diff --git a/sleepyhead/Graphs/gGraph.cpp b/sleepyhead/Graphs/gGraph.cpp
index 11995756..97038456 100644
--- a/sleepyhead/Graphs/gGraph.cpp
+++ b/sleepyhead/Graphs/gGraph.cpp
@@ -671,6 +671,11 @@ void gGraph::timedRedraw(int ms)
     m_graphview->timedRedraw(ms);
 }
 
+qint64 gGraph::currentTime() const
+{
+    return m_graphview->currentTime();
+}
+
 void gGraph::mouseMoveEvent(QMouseEvent *event)
 {
     // qDebug() << m_title << "Move" << event->pos() << m_graphview->pointClicked();
@@ -696,6 +701,21 @@ void gGraph::mouseMoveEvent(QMouseEvent *event)
     double xx = max_x - min_x;
     double xmult = xx / w;
 
+    {
+        xmult = (m_blockzoom ? (rmax_x - rmin_x) : (max_x - min_x)) / w;
+
+        double  a = x;
+
+        if (a < left) a = left;
+        if (a > left+w) a = left+w;
+
+        a -= left;
+        a *= xmult;
+        a += m_blockzoom ? rmin_x : min_x;
+
+        m_graphview->setCurrentTime(a);
+    }
+
     if (m_graphview->m_selected_graph == this) {  // Left Mouse button dragging
         if (event->buttons() & Qt::LeftButton) {
 
diff --git a/sleepyhead/Graphs/gGraph.h b/sleepyhead/Graphs/gGraph.h
index d14b8a4f..17fc5f26 100644
--- a/sleepyhead/Graphs/gGraph.h
+++ b/sleepyhead/Graphs/gGraph.h
@@ -104,6 +104,9 @@ class gGraph : public QObject
     //! \brief Returns true if none of the included layers have data attached
     bool isEmpty();
 
+    qint64 currentTime() const;
+
+
     //! \brief Add Layer l to graph object, allowing you to specify position,
     //         margin sizes, order, movability status and offsets
     void AddLayer(Layer *l, LayerPosition position = LayerCenter,
diff --git a/sleepyhead/Graphs/gGraphView.h b/sleepyhead/Graphs/gGraphView.h
index b129af69..94af3dbb 100644
--- a/sleepyhead/Graphs/gGraphView.h
+++ b/sleepyhead/Graphs/gGraphView.h
@@ -374,6 +374,11 @@ class gGraphView
     //! \brief Used internally by graph mousehandler to set modifier state
     void setMetaSelect(bool b) { m_metaselect = b; }
 
+    //! \brief The current time the mouse pointer is hovering over
+    inline qint64 currentTime() { return m_currenttime; }
+
+    inline void setCurrentTime(qint64 time) { m_currenttime = time; }
+
     inline QPoint currentMousePos() const { return m_mouse; }
 
     // for profiling purposes, a count of lines drawn in a single frame
@@ -489,6 +494,8 @@ class gGraphView
     bool m_blockUpdates;
 
     QPoint m_mouse;
+    qint64 m_currenttime;
+
 
     QTime m_animationStarted;
 
diff --git a/sleepyhead/Graphs/gLineChart.cpp b/sleepyhead/Graphs/gLineChart.cpp
index 5523539f..24729e58 100644
--- a/sleepyhead/Graphs/gLineChart.cpp
+++ b/sleepyhead/Graphs/gLineChart.cpp
@@ -275,25 +275,21 @@ void gLineChart::paint(QPainter &painter, gGraph &w, const QRegion &region)
     }
 
     if (w.graphView()->metaSelect()) {
+        qint64 time = w.currentTime();
 
-
-        QPoint mouse = w.graphView()->currentMousePos();
-        double pos = mouse.x() - left;
-        if (pos > 0) {
-            qint64 xpos = minx + (pos * (xx / double(width)));
-
+        if ((time > minx) && (time < maxx)) {
+            double xpos = (time - minx) * xmult;
             painter.setPen(QPen(QBrush(QColor(Qt::gray)),1));
-            painter.drawLine(mouse.x(), top-w.marginTop()-3, mouse.x(), top+height+w.bottom-1);
-
-
-            QString text = getMetaString(CPAP_Pressure, xpos);
-
-            int wid, h;
-            GetTextExtent(text, wid, h);
-            w.renderText(text, left + width/2 - wid/2, top-h+5);
-
+            painter.drawLine(left+xpos, top-w.marginTop()-3, left+xpos, top+height+w.bottom-1);
         }
 
+
+        QString text = getMetaString(m_codes[0], time);
+
+        int wid, h;
+        GetTextExtent(text, wid, h);
+        w.renderText(text, left + width/2 - wid/2, top-h+5);
+
     }
 
     EventDataType lastpx, lastpy;