public override Expression Build(IEnumerable <Expression> arguments)
{
var source = arguments.First();
var parameterType = source.Type.GetGenericArguments()[0];
var valueParameter = Expression.Parameter(typeof(object));
var viewParameter = Expression.Parameter(typeof(RollingGraphVisualizer));
var elementVariable = Expression.Variable(parameterType);
Controller = new VisualizerController();
Controller.Capacity = Capacity.GetValueOrDefault();
var selectedIndex = GraphHelper.SelectIndexMember(elementVariable, IndexSelector, out Controller.IndexLabel);
Controller.IndexType = selectedIndex.Type;
if (selectedIndex.Type != typeof(double) && selectedIndex.Type != typeof(string))
{
selectedIndex = Expression.Convert(selectedIndex, typeof(double));
}
var selectedValues = GraphHelper.SelectDataValues(elementVariable, ValueSelector, out Controller.ValueLabels);
var showBody = Expression.Block(new[] { elementVariable },
Expression.Assign(elementVariable, Expression.Convert(valueParameter, parameterType)),
Expression.Call(viewParameter, nameof(RollingGraphVisualizer.AddValues), null, selectedIndex, selectedValues));
Controller.AddValues = Expression.Lambda <Action <object, RollingGraphVisualizer> >(showBody, valueParameter, viewParameter).Compile();
return(Expression.Call(typeof(RollingGraphBuilder), nameof(Process), new[] { parameterType }, source));
}
public override Expression Build(IEnumerable <Expression> arguments)
{
var source = arguments.First();
var parameterType = source.Type.GetGenericArguments()[0];
var valueParameter = Expression.Parameter(typeof(object));
var viewParameter = Expression.Parameter(typeof(LineGraphVisualizer));
var elementVariable = Expression.Variable(parameterType);
Controller = new VisualizerController();
Controller.Capacity = Capacity.GetValueOrDefault();
Controller.SymbolType = SymbolType;
Controller.LineWidth = LineWidth;
var selectedValues = GraphHelper.SelectDataPoints(elementVariable, ValueSelector, out Controller.ValueLabels);
var addValuesBody = Expression.Block(new[] { elementVariable },
Expression.Assign(elementVariable, Expression.Convert(valueParameter, parameterType)),
Expression.Call(viewParameter, nameof(LineGraphVisualizer.AddValues), null, selectedValues));
Controller.AddValues = Expression.Lambda <Action <object, LineGraphVisualizer> >(addValuesBody, valueParameter, viewParameter).Compile();
return(Expression.Call(typeof(LineGraphBuilder), nameof(Process), new[] { parameterType }, source));
}
