User Chart refresh on filter changes

.. quite a few of the standard signals are ignored. this one fixes
   up refresh when the home filters are changed.

src/Charts/GenericPlot.cpp

@@ -529,6 +529,10 @@ GenericPlot::addCurve(QString name, QVector<double> xseries, QVector<double> yse
             QLineSeries *add = new QLineSeries();
             add->setName(name);
 
+            // get setup for click thru
+            connect(add, SIGNAL(clicked(QPointF)), selector, SLOT(seriesClicked())); // catch series clicks
+            filenames.insert(add, fseries);
+
             // aesthetics
             add->setBrush(Qt::NoBrush);
             QPen pen(color);

src/Charts/GenericSelectTool.cpp

@@ -414,7 +414,7 @@ GenericSelectTool::clicked(QPointF pos)
     bool updatescene = false;
 
     // click on a point to click-thru
-    if (hoverpoint.index != -1) { // hovering and clicked
+    if (hoverpoint.index != -1) { // scatter plot
         emit seriesClicked(hoverseries, hoverpoint);
 
         // not sure need to do this....

src/Charts/UserChart.cpp

@@ -54,6 +54,8 @@ UserChart::UserChart(Context *context, bool rangemode) : GcChartWindow(context),
         connect(this, SIGNAL(rideItemChanged(RideItem*)), this, SLOT(setRide(RideItem*)));
     } else {
         connect(this, SIGNAL(dateRangeChanged(DateRange)), SLOT(setDateRange(DateRange)));
+        connect(context, SIGNAL(homeFilterChanged()), this, SLOT(refresh()));
+        connect(context, SIGNAL(filterChanged()), this, SLOT(refresh()));
     }
 
     // need to refresh when chart settings change
@@ -139,6 +141,8 @@ UserChart::setRide(RideItem *item)
  void
  UserChart::refresh()
  {
+    if (!amVisible()) { stale=true; return; }
+
     // ok, we've run out of excuses, looks like we need to plot
     chart->initialiseChart(chartinfo.title, chartinfo.type, chartinfo.animate, chartinfo.legendpos, chartinfo.stack, chartinfo.orientation);