internal bool ComputeScale(SimpleLineChart trigger)
{
bool changed = false;
ChartScaleInfo combined = null;
int index = this.scaleIndex;
// make sure they are all up to date.
foreach (var ptr in FindCharts())
{
ChartScaleInfo info = ptr.ComputeScaleSelf(index);
if (combined == null)
{
combined = info;
}
else
{
combined.Combine(info);
}
}
foreach (var ptr in FindCharts())
{
if (ptr.ApplyScale(combined))
{
if (ptr != trigger)
{
ptr.DelayedUpdate();
}
changed = true;
}
}
return(changed);
}
private static void FixNextPointers(Grid group)
{
// fix up the "next" pointers for removed chart.
SimpleLineChart first = null;
SimpleLineChart previous = null;
foreach (UIElement f in group.Children)
{
SimpleLineChart chart = f as SimpleLineChart;
if (chart != null)
{
if (first == null)
{
first = chart;
chart.Next = null;
}
else
{
previous.Next = chart;
chart.Next = first;
}
previous = chart;
}
}
foreach (UIElement f in group.Children)
{
SimpleLineChart chart = f as SimpleLineChart;
if (chart != null)
{
chart.InvalidateArrange();
}
}
}
public void RemoveChart(SimpleLineChart e)
{
if (e.Parent == theStack)
{
theStack.Children.Remove(e);
}
else if (e.Parent is Grid)
{
// it's a chart group then.
Grid group = (Grid)e.Parent;
group.Children.Remove(e);
SimpleLineChart chart = e as SimpleLineChart;
if (chart != null)
{
chart.Next = null;
}
if (group.Children.Count == 0)
{
theStack.Children.Remove(group);
}
else
{
FixNextPointers(group);
}
}
}
public IEnumerable <SimpleLineChart> FindCharts()
{
List <SimpleLineChart> result = new List <SimpleLineChart>();
foreach (UIElement f in this.Children)
{
SimpleLineChart chart = f as SimpleLineChart;
if (chart != null)
{
result.Add(chart);
}
}
return(result);
}
public IEnumerable <SimpleLineChart> FindCharts()
{
foreach (UIElement e in Snapshot(theStack.Children))
{
SimpleLineChart chart = e as SimpleLineChart;
if (chart != null)
{
yield return(chart);
}
ChartGroup group = e as ChartGroup;
if (group != null)
{
foreach (SimpleLineChart child in group.FindCharts())
{
yield return(child);
}
}
}
}
public void RemoveChart(SimpleLineChart e)
{
if (e.Parent == theStack)
{
theStack.Children.Remove(e);
}
else if (e.Parent is ChartGroup)
{
// it's a chart group then.
ChartGroup group = (ChartGroup)e.Parent;
group.Children.Remove(e);
SimpleLineChart chart = e as SimpleLineChart;
if (chart != null)
{
chart.Group = null;
}
if (group.Children.Count == 0)
{
theStack.Children.Remove(group);
}
group.InvalidateCharts();
}
}
public IEnumerable <SimpleLineChart> FindCharts()
{
foreach (UIElement e in Snapshot(theStack.Children))
{
SimpleLineChart chart = e as SimpleLineChart;
if (chart != null)
{
yield return(chart);
}
Grid group = e as Grid;
if (group != null)
{
foreach (UIElement f in Snapshot(group.Children))
{
chart = f as SimpleLineChart;
if (chart != null)
{
yield return(chart);
}
}
}
}
}
internal void AddChart(SimpleLineChart chart)
{
this.Children.Add(chart);
chart.Group = this;
InvalidateCharts();
}
private void LiveUpdate(SimpleLineChart chart, MavlinkLog currentFlightLog, LogItemSchema schema)
{
// this method is running on a background task and it's job is to read an infinite stream of
// data values from the log and show them in the live scrolling chart.
CancellationTokenSource canceller = new CancellationTokenSource();
chart.Closed += (s,e) =>
{
canceller.Cancel();
};
var query = currentFlightLog.LiveQuery(schema, canceller.Token);
foreach (DataValue item in query)
{
if (item == null)
{
return;
}
chart.SetCurrentValue(item);
}
}
// bugbug: should concatenate data from selected logs - then sort by X...
// bugbug: give them unique X values that are smooth over time. Alternatively we could
// give the entry Timestamp, but that seems to bunch up the values, so timeclock is not
// updating smoothly for some reason...
private void InitializeChartData(LogItemSchema schema, SimpleLineChart chart, List<DataValue> values)
{
int x = 0;
foreach (var d in values)
{
d.X = x++;
}
chart.SetData(new Model.DataSeries()
{
Name = schema.Name,
Values = values
});
}
private void GraphItem(LogItemSchema schema)
{
if (schema.IsNumeric)
{
ChartStack.Visibility = Visibility.Visible;
ChartStack.UpdateLayout();
SimpleLineChart chart = new SimpleLineChart();
chart.Margin = defaultChartMargin;
chart.Focusable = false;
chart.Closed += OnChartClosed;
chart.LineColor = HlsColor.GetRandomColor();
chart.StrokeThickness = 1;
chart.Tag = schema;
if (currentFlightLog != null && schema.Root == currentFlightLog.Schema)
{
List<DataValue> values = new List<DataValue>(currentFlightLog.GetDataValues(schema, DateTime.MinValue, TimeSpan.MaxValue));
InitializeChartData(schema, chart, values);
// now turn on live scrolling...
chart.LiveScrolling = true;
// now start watching the live update for new values that need to be added to this chart.
Task.Run(() =>
{
LiveUpdate(chart, currentFlightLog, schema);
});
}
else
{
List<DataValue> values = new List<DataValue>(GetSelectedDataValues(schema));
InitializeChartData(schema, chart, values);
}
if (chartGroup != null)
{
SimpleLineChart last = null;
if (chartGroup.Children.Count > 0)
{
last = chartGroup.Children[chartGroup.Children.Count - 1] as SimpleLineChart;
}
chartGroup.Children.Add(chart);
if (chartGroup.Parent == null)
{
ChartStack.AddChart(chartGroup);
}
if (last != null)
{
last.Next = chart;
}
}
else
{
ChartStack.AddChart(chart);
}
LayoutCharts();
Messages.Visibility = Visibility.Collapsed;
}
else
{
Paragraph p = new Paragraph();
foreach (var value in GetSelectedDataValues(schema))
{
p.Inlines.Add(new Run(value.Label));
p.Inlines.Add(new LineBreak());
}
var doc = Messages.Document;
doc.Blocks.Add(p);
Messages.Visibility = Visibility.Visible;
Messages.Focus();
}
}
public void AddChart(SimpleLineChart chart)
{
theStack.Children.Add(chart);
}
