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Insert colored path in block

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PdfProcessing
This is a migrated thread and some comments may be shown as answers.
Dirk
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Dirk asked on 19 Jan 2018, 02:49 PM

Hi,

I'm just evaluating this library.
I want to create a PDF with path objects, but I'm not able set any color.
I'm converting a WPF Path (System.Media.Windows.geometry) with the PdfGeometryHelper.ConvertPathGeometry (Telerik example)) to a Telerik Path geometry:

      var wpfWindpwsPath= Geometry.Parse("F1 M 7.5,11.500 L 21.500,11.500 L 21.500,15.500 L 7.500,15.500 L 7.500,11.500 Z");
      var wpfWindpwsPathGeometry = wpfWindpwsPath.GetFlattenedPathGeometry();
      var wpfTelerikPathGeometry = PdfGeometryHelper.ConvertPathGeometry(wpfWindpwsPathGeometry);

      var block = addTableCell.Blocks.AddBlock();
      Telerik.Windows.Documents.Fixed.Model.Graphics.Path path = new Telerik.Windows.Documents.Fixed.Model.Graphics.Path();
      path.Fill = new RgbColor(156, 156, 155);
      path.Geometry = wpfTelerikPathGeometry;

//not possible
      block.InsertPath(path);

// this is possible, but color is black

      block.InsertPath(path.Geometry);

 

How can I set a color?

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Dirk
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answered on 23 Jan 2018, 12:06 PM

I've still found an answer.

I only have to set

block.GraphicProperties.StrokeThickness = 1;
block.GraphicProperties.StrokeColor = new RgbColor(156, 156, 155);

But I now have an addional question:

I want to add multiple paths with different colors to the same block.
For example a cross with a black and a red line.

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Deyan
Telerik team
answered on 24 Jan 2018, 12:09 PM
Hello Dirk,

PathGeometry instances may have only a single color even with multiple figures. However, you may use FormSource in order to insert more complex content in a Block. The CreateBlockWithPaths method from the following code snippet shows how to create Block with simple geometry and with a FormSource. Sample export of such Block may be seen in the PDF file from the attached archive "PathGeometry_vs_FormSource.zip".
private static Block CreateBlockWithPaths()
{
    Block block = new Block();
 
    block.GraphicProperties.IsFilled = false;
    block.GraphicProperties.IsStroked = true;
    block.GraphicProperties.StrokeColor = new RgbColor(0, 0, 255);
    block.GraphicProperties.StrokeThickness = 1;
 
    block.InsertText("PathGeometry: ");
    PathGeometry pathWithTwoFigures = GetPathWithMultipleFigures();
    block.InsertPath(pathWithTwoFigures);
             
    block.InsertText(" vs FormSource: ");
    FormSource formWithTwoColors = GetFormWithTwoColoredPaths();
    block.InsertForm(formWithTwoColors);
 
    return block;
}
 
private static FormSource GetFormWithTwoColoredPaths()
{
    FormSource formSource = new FormSource();
    PathGeometry spiralGeometry, rectanglesGeometry;
    GetGoldenSpiralGeometry(10, out spiralGeometry, out rectanglesGeometry);
    formSource.Size = rectanglesGeometry.Bounds.Size;
 
    FixedContentEditor formEditor = new FixedContentEditor(formSource);
    formEditor.GraphicProperties.IsStroked = true;
 
    formEditor.GraphicProperties.IsFilled = true;
    formEditor.GraphicProperties.FillColor = new RgbColor(100, 0, 180, 0);
    formEditor.GraphicProperties.StrokeColor = new RgbColor(0, 180, 0);
    formEditor.GraphicProperties.StrokeThickness = 5;
    formEditor.DrawPath(rectanglesGeometry);
 
    formEditor.GraphicProperties.IsFilled = false;
    formEditor.GraphicProperties.StrokeColor = new RgbColor(255, 0, 0);
    formEditor.GraphicProperties.StrokeThickness = 2;
    formEditor.DrawPath(spiralGeometry);
 
    return formSource;
}
 
private static PathGeometry GetPathWithMultipleFigures()
{
    PathGeometry spiralGeometry, rectanglesGeometry;
    GetGoldenSpiralGeometry(10, out spiralGeometry, out rectanglesGeometry);
    rectanglesGeometry.Figures.Add(spiralGeometry.Figures[0]);      
 
    return rectanglesGeometry;
}
 
private static void GetGoldenSpiralGeometry(int arcsCount, out PathGeometry spiralGeometry, out PathGeometry rectanglesGeometry)
{
    double sin45 = 1 / Math.Sqrt(2);
 
    Vector[] directions =
    {
        new Vector(1, -1) * sin45,
        new Vector(1, 1) * sin45,
        new Vector(-1, 1) * sin45,
        new Vector(-1, -1) * sin45
    };
 
    double length = 100;
    double fi = (Math.Sqrt(5) - 1) / 2;
 
    spiralGeometry = new PathGeometry();
    rectanglesGeometry = new PathGeometry();
    PathFigure spiralFigure = spiralGeometry.Figures.AddPathFigure();
    spiralFigure.StartPoint = new Point(0, length);
    Point previousPoint = spiralFigure.StartPoint;
 
    for (int i = 0; i < arcsCount; i++)
    {
        Vector delta = directions[i % 4] * (length / sin45);
        Point point = previousPoint + delta;
 
        PathFigure rectanglePath = rectanglesGeometry.Figures.AddPathFigure();
        Rect rect = new Rect(previousPoint, point);
        rectanglePath.StartPoint = rect.TopLeft;
        rectanglePath.Segments.AddLineSegment().Point = rect.TopRight;
        rectanglePath.Segments.AddLineSegment().Point = rect.BottomRight;
        rectanglePath.Segments.AddLineSegment().Point = rect.BottomLeft;
        rectanglePath.IsClosed = true;
 
        ArcSegment arc = spiralFigure.Segments.AddArcSegment();
        arc.RadiusX = length;
        arc.RadiusY = length;
        arc.SweepDirection = SweepDirection.Clockwise;
        arc.RotationAngle = 45;
        arc.Point = point;
 
        previousPoint = point;
        length *= fi;
    }
}

I hope this is helpful. If you have any other questions or concerns do not hesitate to contact us again.

Regards,
Deyan
Progress Telerik

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Dirk
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Dirk
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Deyan
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