dynamicdatadisdisplay D3线条图颜色改变

Question

plotter为DynamicDataDisplay.ChatterPlot变量。它添加了如下几行:

 LineGraph lgChA = plotter.AddLineGraph(dsChA, Colors.Red, 1, "Data");
 LineGraph lgChB = plotter.AddLineGraph(dsChB, Colors.Green, 1, "Data");

图表是实时更新的，所以我只更新数据源，如下所示:

if (_dataXChA != null && _dataXChA.Length > 1)
        {
            EnumerableDataSource<double> xChA = new EnumerableDataSource<double>(_dataXChA);
            xChA.SetXMapping(xVal => xVal);
            if (_dataYChA != null && _dataYChA.Length == _dataXChA.Length)
            {
                EnumerableDataSource<double> yChA = new EnumerableDataSource<double>(_dataYChA);
                yChA.SetYMapping(yVal => yVal);
                CompositeDataSource dsChA = new CompositeDataSource(xChA, yChA);
                //((LineGraph)plotter.brus = dsChA; 
                ((LineGraph)plotter.Children.ElementAt(startIndex)).DataSource = dsChA;                    
                plotter.FitToView();
            }
        }
        if (_dataXChB != null && _dataXChB.Length > 1)
        {
            EnumerableDataSource<double> xChB = new EnumerableDataSource<double>(_dataXChB);
            xChB.SetXMapping(xVal => xVal);
            if (_dataYChB != null && _dataYChB.Length == _dataXChB.Length)
            {
                EnumerableDataSource<double> yChB = new EnumerableDataSource<double>(_dataYChB);
                yChB.SetYMapping(yVal => yVal);                    
                CompositeDataSource dsChB = new CompositeDataSource(xChB, yChB);
                ((LineGraph)plotter.Children.ElementAt(startIndex + 1)).DataSource = dsChB; 
                plotter.FitToView();
            }
        }

但我想知道，除了更新数据点，无论如何我都可以改变LineGraph变量的画笔颜色吗?我猜应该在某个地方，比如plot . xxx .color ?

Answer 1

你可以像这样改变你的线条的颜色:

LineGraph lgChA = plotter.AddLineGraph(dsChA, Colors.Red, 1, "Data");
Pen newColour = new Pen(Brushes.Red, 1.0);
//or whatever colour you want to change it to, second parameter is line thickness
lgChA.LinePen = newColour;

你的线条将更新为你给它的笔的颜色。

Answer 2

所以基本上，我通过在每次重新分配颜色之前将颜色设置为透明来解决这个问题。像这样:

for (int i = 0; i < LiveImage.MAX_CHANNELS; i++)    // color reset
                {
                    ((LineGraph)plotter.Children.ElementAt(startIndex + i)).LinePen = new Pen(new SolidColorBrush(Colors.Transparent), 1);
            }

关键是不要添加任何线形图