PDPSharp 图表位置和背景

Question

如何获得 X 轴和 Y 轴开始的图形的 x、y 位置（折线图中点 0,0 的 x、y 位置）？此位置可能会根据 Y 轴上的文本值而改变。

图片仅供参考。

如何更改图表的背景颜色（目前为线性蓝色）（我使用 PDFsharp NuGet 包）？

示例代码：

ChartFrame chartFrame = new ChartFrame();
chartFrame.Location = new XPoint(xOffset, yLoc);
double chartHeight = Math.Min(250, (page.Height - yLoc - 10));
chartFrame.Size = new XSize((page.Width - (xOffset * 2)), chartHeight);

Chart chart = new Chart(ChartType.Line);
//chart.PlotArea.FillFormat.Color = XColor.FromArgb(255, 255, 255, 255); //plot background???

Series series = chart.SeriesCollection.AddSeries();
series.ChartType = ChartType.Line;
series.MarkerStyle = PdfSharp.Charting.MarkerStyle.None;
series.Name = "Horizontal"; //Series 1
series.MarkerBackgroundColor = XColor.FromArgb(255, 0, 0, 255); //blue
series.MarkerSize = 1;
series.Add(line1);

series = chart.SeriesCollection.AddSeries();
series.ChartType = ChartType.Line;
series.MarkerStyle = PdfSharp.Charting.MarkerStyle.None;
series.Name = "Vertical"; //Series 2
series.MarkerBackgroundColor = XColor.FromArgb(255, 0, 170, 0); //green
series.MarkerSize = 1;
series.Add(line2);

series = chart.SeriesCollection.AddSeries();
series.ChartType = ChartType.Line;
series.MarkerStyle = PdfSharp.Charting.MarkerStyle.None;
series.Name = "3D position"; //Series 3
series.MarkerBackgroundColor = XColor.FromArgb(255, 255, 0, 0); //red
series.MarkerSize = 1;
series.Add(line3);

chart.XAxis.MajorTickMark = TickMarkType.Outside;
chart.XAxis.Title.Caption = "No. Events"; //X-Axis

chart.YAxis.MajorTickMark = TickMarkType.Outside;
chart.YAxis.HasMajorGridlines = true;
double yOffset = ((maxYscale - minYscale) / 6);
if (yOffset < 0.01f)
    yOffset = 0.01f;
chart.YAxis.MinimumScale = 0;
chart.YAxis.MaximumScale = Math.Round(Math.Round((maxYscale + yOffset), 3), 2);
double jump = Math.Round(yOffset, 2);
if (jump < 0.01f)
    jump = 0.01f;
chart.YAxis.MajorTick = jump;
chart.YAxis.TickLabels.Format = "#0.00";
//chart.YAxis.HasMinorGridlines = true;
chart.YAxis.Title.Caption = "[m]"; //Y-Axis
chart.YAxis.HasMajorGridlines = true;

chart.PlotArea.LineFormat.Color = XColors.DarkGray;
chart.PlotArea.LineFormat.Width = 1;
chart.PlotArea.LineFormat.Visible = true;

chart.Legend.Docking = DockingType.Bottom;
chart.Legend.LineFormat.Visible = true;

XSeries xseries = chart.XValues.AddXSeries();
xseries.Add(eventLine);

chartFrame.Add(chart);
chartFrame.Draw(gfx);

Answer 1

回复：对于 X、Y 位置：我快速检查了 YAxis 上的文本长度，然后根据该值计算新的 X、Y 位置。回复：背景颜色：这些颜色在 ChartFrame class（绘制方法）中进行了硬编码。所以 PDFSharp 的 nugget 包不好，你需要下载库源代码。搜索“XColor.FromArgb(0xFFD0DEEF)”并根据需要更新源代码。

PDPSharp 图表位置和背景

PDPSharp chart location and background

c#

pdfsharp