AcceptStart

GroupShape.AcceptStart method

Accepts a visitor for visiting the start of the GroupShape.

public override VisitorAction AcceptStart(DocumentVisitor visitor)
ParameterTypeDescription
visitorDocumentVisitorThe document visitor.

Return Value

The action to be taken by the visitor.

Examples

Shows how to create a group of shapes, and print its contents using a document visitor.

public void GroupOfShapes()
{
    Document doc = new Document();
    DocumentBuilder builder = new DocumentBuilder(doc);

    // If you need to create "NonPrimitive" shapes, such as SingleCornerSnipped, TopCornersSnipped, DiagonalCornersSnipped,
    // TopCornersOneRoundedOneSnipped, SingleCornerRounded, TopCornersRounded, DiagonalCornersRounded
    // please use DocumentBuilder.InsertShape methods.
    Shape balloon = new Shape(doc, ShapeType.Balloon)
    {
        Width = 200,
        Height = 200,
        Stroke = { Color = Color.Red }
    };

    Shape cube = new Shape(doc, ShapeType.Cube)
    {
        Width = 100,
        Height = 100,
        Stroke = { Color = Color.Blue }
    };

    GroupShape group = new GroupShape(doc);
    group.AppendChild(balloon);
    group.AppendChild(cube);

    Assert.True(group.IsGroup);

    builder.InsertNode(group);

    ShapeGroupPrinter printer = new ShapeGroupPrinter();
    group.Accept(printer);

    Console.WriteLine(printer.GetText());
}

/// <summary>
/// Prints the contents of a visited shape group to the console.
/// </summary>
public class ShapeGroupPrinter : DocumentVisitor
{
    public ShapeGroupPrinter()
    {
        mBuilder = new StringBuilder();
    }

    public string GetText()
    {
        return mBuilder.ToString();
    }

    public override VisitorAction VisitGroupShapeStart(GroupShape groupShape)
    {
        mBuilder.AppendLine("Shape group started:");
        return VisitorAction.Continue;
    }

    public override VisitorAction VisitGroupShapeEnd(GroupShape groupShape)
    {
        mBuilder.AppendLine("End of shape group");
        return VisitorAction.Continue;
    }

    public override VisitorAction VisitShapeStart(Shape shape)
    {
        mBuilder.AppendLine("\tShape - " + shape.ShapeType + ":");
        mBuilder.AppendLine("\t\tWidth: " + shape.Width);
        mBuilder.AppendLine("\t\tHeight: " + shape.Height);
        mBuilder.AppendLine("\t\tStroke color: " + shape.Stroke.Color);
        mBuilder.AppendLine("\t\tFill color: " + shape.Fill.ForeColor);
        return VisitorAction.Continue;
    }

    public override VisitorAction VisitShapeEnd(Shape shape)
    {
        mBuilder.AppendLine("\tEnd of shape");
        return VisitorAction.Continue;
    }

    private readonly StringBuilder mBuilder;
}

See Also

GroupShape.AcceptEnd