Question

plotter是一个DynamicDataDisplay.ChatterPlot变量。它添加了几行如下：

 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，除了更新数据点之外，我还能改变LineGraph变量的画笔颜色吗？我想这应该是在plotter.XXX.color？

之类的地方

Answer 1

您可以像这样更改线条的颜色：

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;

然后，您的线将更新为您提供的笔的颜色。

Answer 2

基本上，我通过在重新分配颜色之前将颜色设置为透明来解决此问题。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折线图。

DynamicDataDisplay D3 LineGraph颜色变化

2 个答案: