Example 019: Graph showing large quantity of data

1// This example builds upon the basic CreateSimpleGraph '000' example chart //
2CreateSimpleGraph(Pego1);
3 
4// Enable Manipulation and Mouse Wheel Zoom Smoothing //
5Pego1.PeUserInterface.Scrollbar.MouseWheelZoomSmoothness = 5;
6Pego1.PeUserInterface.Scrollbar.PinchZoomSmoothness = 2;
7 
8Pego1.PeUserInterface.Scrollbar.MouseWheelZoomFactor = 1.2f;
9Pego1.PeUserInterface.Scrollbar.PinchZoomFactor = 1.1F;
10 
11// Enable MouseWheel Zooming
12Pego1.PeUserInterface.Scrollbar.MouseWheelFunction = MouseWheelFunction.HorizontalZoom;
13 
14// Disable some features not ideal for larger data sets.
15Pego1.PePlot.Option.PointGradientStyle = PlotGradientStyle.NoGradient;
16Pego1.PeColor.PointBorderColor = Color.FromArgb(0, 0, 0, 0);
17Pego1.PePlot.Option.LineSymbolThickness = 0;
18 
19// Enable ZoomWindow '
20Pego1.PePlot.ZoomWindow.Show = true;
21 
22// pass the data, this time with FastCopyFrom call //
23Pego1.PeData.Subsets = 1;
24Pego1.PeData.Points = 100000;
25 
26// Prepare data in temp array, make sure it is Single (4 byte floats) **'
27float[] MyYData = new float[100000];
28int j, k;
29for(j = 0; j < 100000; j++)
30    MyYData[j] = (float)(System.Math.Sin(0.0003 * j) * 500.0);
31 
32// Change some of the data so we can see some //'
33// variations in data //'
34for(j = 0; j < 100000; j+=10000)
35{
36    for(k = 0; k <= 5000; k++)
37        MyYData[j + k] = MyYData[j + k] - 50 + ((float)(Rand_Num.NextDouble()) * 100);
38}
39 
40// Perform the transfer of data //'
41Pego1.PeData.Y.FastCopyFrom(MyYData);
42 
43// This empties PointLabels array and invokes virtual point labels //'
44// which are the point number.
45Pego1.PeString.PointLabels[-1] = "0";
46 
47// Set plotting method to line and allow zooming //'
48Pego1.PePlot.Method = GraphPlottingMethod.Line;
49Pego1.PeUserInterface.Allow.Zooming = AllowZooming.Horizontal;
50Pego1.PeUserInterface.Dialog.PlotCustomization = false;
51 
52// This allows plotting of zero values //'
53Pego1.PeData.NullDataValue = -99999;
54 
55Pego1.PeLegend.SubsetLineTypes[0] = LineType.ThinSolid;
56 
57Pego1.PePlot.MarkDataPoints = false;
58 
59Pego1.PeColor.BitmapGradientMode = false;
60Pego1.PeColor.QuickStyle = QuickStyle.LightShadow;
61Pego1.PePlot.DataShadows = DataShadows.None;
62Pego1.PeUserInterface.Dialog.AllowEmfExport = false;
63Pego1.PeUserInterface.Dialog.AllowWmfExport = false;
64 
65Pego1.PeConfigure.RenderEngine = RenderEngine.Direct3D;
66 
67Pego1.PeFunction.ReinitializeResetImage();
68Pego1.Invalidate();
69// Optionally call Pego1.Refresh() if you are not seeing changes immediately