void UpdateGraph(GraphDataProvider provider)
{
var shape = this.shapeTable[provider];
RebuildGraphGeometry(provider, shape.PathGeometry);
shape.InvalidateVisual();
}
void RebuildGraphGeometry(GraphDataProvider provider, PathGeometry geometry)
{
ulong startTime = this.TimeAxis.VisibleTimeStart;
ulong endTime = this.TimeAxis.VisibleTimeEnd;
ulong granularity;
// "granularity" is the time period at which nodes start to disappear. The graph data provider
// will return at most 3 nodes in one granularity unit of time (min, max, last).
granularity = (ulong)((endTime - startTime) / (this.graphGrid.ActualWidth / 12));
var pathFigure = new PathFigure {
IsClosed = true
};
var nodes = provider.GetNodesInTimespan(startTime, endTime, granularity);
double height = this.graphGrid.ActualHeight;
double x = 0, lastY = 0;
bool first = true;
foreach (var node in nodes)
{
x = this.TimeAxis.TimeToScreen(node.StartTime);
double y = height - this.SideBar.YToPixels(node.Y);
if (first)
{
pathFigure.StartPoint = new Point(x, height);
pathFigure.Segments.Add(new LineSegment(new Point(x, y), false));
first = false;
}
else
{
if (this.SquarePeaks)
{
pathFigure.Segments.Add(new LineSegment(new Point(x, lastY), true));
}
pathFigure.Segments.Add(new LineSegment(new Point(x, y), true));
}
lastY = y;
}
geometry.Figures.Clear();
if (first)
{
// No data in this time window
return;
}
pathFigure.Segments.Add(new LineSegment(new Point(x, height), false));
geometry.Figures.Add(pathFigure);
}
static void OnIsSelectedChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
GraphDataProvider provider = obj as GraphDataProvider;
if (provider != null)
{
if (provider.IsSelected)
{
provider.ZIndex = ++nextZIndex;
}
provider.SetRenderValues();
}
}
public bool AddDataSource(IGraphDataSource graphDataSource)
{
if (graphDataProviders.Count == MaxDataSources)
{
// Maximum number of data sources has already been reached
return(false);
}
var provider = new GraphDataProvider {
DataSource = graphDataSource, IsGraphed = true
};
provider.PenData = graphDataPens.FirstOrDefault(p => !usedPens.Contains(p));
if (!(graphDataSource is IHiddenGraphDataSource))
{
this.usedPens.Add(provider.PenData);
}
this.graphDataProviders.Add(provider);
provider.DataChanged += OnProviderDataChanged;
var shape = new GraphShape {
Stroke = provider.PenData.Brush, StrokeDashCap = PenLineCap.Round, StrokeLineJoin = PenLineJoin.Round
};
shape.SetBinding(Shape.StrokeThicknessProperty, new Binding {
Source = provider, Path = new PropertyPath(GraphDataProvider.StrokeThicknessProperty)
});
shape.SetBinding(Shape.StrokeDashArrayProperty, new Binding {
Source = provider, Path = new PropertyPath(GraphDataProvider.StrokeDashArrayProperty)
});
shape.SetBinding(Shape.FillProperty, new Binding {
Source = provider, Path = new PropertyPath(GraphDataProvider.FillProperty)
});
shape.SetBinding(Panel.ZIndexProperty, new Binding {
Source = provider, Path = new PropertyPath(GraphDataProvider.ZIndexProperty)
});
this.shapeTable.Add(provider, shape);
if (this.canvas != null)
{
this.canvas.Children.Add(shape);
}
OnProviderDataChanged(provider, EventArgs.Empty);
return(true);
}
public GraphDataBar()
{
this.SideBar = new GraphDataSideBar(this);
this.SideBar.VerticalAlignment = VerticalAlignment.Top;
this.SideBar.YAxisChanged += OnYAxisChanged;
this.SideBar.YAxisDefaultRequested += OnYAxisDefaultRequested;
this.readOnlyProviders = new ReadOnlyObservableCollection <GraphDataProvider>(graphDataProviders);
CollectionViewSource.GetDefaultView(readOnlyProviders).Filter = (item =>
{
GraphDataProvider gdp = item as GraphDataProvider;
return(!(gdp.DataSource is IHiddenGraphDataSource));
});
this.timeStart = 0;
this.DataRangeStop = 0;
this.timeEnd = this.MinimumGraphTime;
InitPausePointShape();
}
static void OnDataSourceChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
GraphDataProvider provider = obj as GraphDataProvider;
if (provider != null)
{
var oldSource = e.OldValue as IGraphDataSource;
if (oldSource != null)
{
oldSource.DataChanged -= provider.OnDataChanged;
}
var newSource = e.NewValue as IGraphDataSource;
if (newSource != null)
{
newSource.DataChanged += provider.OnDataChanged;
}
}
}
void RebuildGraphGeometry(GraphDataProvider provider, PathGeometry geometry)
{
ulong startTime = this.TimeAxis.VisibleTimeStart;
ulong endTime = this.TimeAxis.VisibleTimeEnd;
ulong granularity;
// "granularity" is the time period at which nodes start to disappear. The graph data provider
// will return at most 3 nodes in one granularity unit of time (min, max, last).
granularity = (ulong)((endTime - startTime) / (this.graphGrid.ActualWidth / 12));
var pathFigure = new PathFigure { IsClosed = true };
var nodes = provider.GetNodesInTimespan(startTime, endTime, granularity);
double height = this.graphGrid.ActualHeight;
double x = 0, lastY = 0;
bool first = true;
foreach (var node in nodes)
{
x = this.TimeAxis.TimeToScreen(node.StartTime);
double y = height - this.SideBar.YToPixels(node.Y);
if (first)
{
pathFigure.StartPoint = new Point(x, height);
pathFigure.Segments.Add(new LineSegment(new Point(x, y), false));
first = false;
}
else
{
if (this.SquarePeaks)
{
pathFigure.Segments.Add(new LineSegment(new Point(x, lastY), true));
}
pathFigure.Segments.Add(new LineSegment(new Point(x, y), true));
}
lastY = y;
}
geometry.Figures.Clear();
if (first)
{
// No data in this time window
return;
}
pathFigure.Segments.Add(new LineSegment(new Point(x, height), false));
geometry.Figures.Add(pathFigure);
}
void UpdateGraph(GraphDataProvider provider)
{
var shape = this.shapeTable[provider];
RebuildGraphGeometry(provider, shape.PathGeometry);
shape.InvalidateVisual();
}
public bool AddDataSource(IGraphDataSource graphDataSource)
{
if (graphDataProviders.Count == MaxDataSources)
{
// Maximum number of data sources has already been reached
return false;
}
var provider = new GraphDataProvider { DataSource = graphDataSource, IsGraphed = true };
provider.PenData = graphDataPens.FirstOrDefault(p => !usedPens.Contains(p));
if (!(graphDataSource is IHiddenGraphDataSource))
{
this.usedPens.Add(provider.PenData);
}
this.graphDataProviders.Add(provider);
provider.DataChanged += OnProviderDataChanged;
var shape = new GraphShape { Stroke = provider.PenData.Brush, StrokeDashCap = PenLineCap.Round, StrokeLineJoin = PenLineJoin.Round };
shape.SetBinding(Shape.StrokeThicknessProperty, new Binding { Source = provider, Path = new PropertyPath(GraphDataProvider.StrokeThicknessProperty) });
shape.SetBinding(Shape.StrokeDashArrayProperty, new Binding { Source = provider, Path = new PropertyPath(GraphDataProvider.StrokeDashArrayProperty) });
shape.SetBinding(Shape.FillProperty, new Binding { Source = provider, Path = new PropertyPath(GraphDataProvider.FillProperty) });
shape.SetBinding(Panel.ZIndexProperty, new Binding { Source = provider, Path = new PropertyPath(GraphDataProvider.ZIndexProperty) });
this.shapeTable.Add(provider, shape);
if (this.canvas != null)
{
this.canvas.Children.Add(shape);
}
OnProviderDataChanged(provider, EventArgs.Empty);
return true;
}