StreamGeometryContext.PolyBezierTo Methode

public:
 abstract void PolyBezierTo(System::Collections::Generic::IList<System::Windows::Point> ^ points, bool isStroked, bool isSmoothJoin);

public abstract void PolyBezierTo(System.Collections.Generic.IList<System.Windows.Point> points, bool isStroked, bool isSmoothJoin);

abstract member PolyBezierTo : System.Collections.Generic.IList<System.Windows.Point> * bool * bool -> unit

Public MustOverride Sub PolyBezierTo (points As IList(Of Point), isStroked As Boolean, isSmoothJoin As Boolean)

Parameters

Uitzonderingen

Voorbeelden

In het volgende voorbeeld ziet u hoe u meerdere verbonden Bezier-curven tekent met behulp van de PolyBezierTo methode.

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Collections.Generic;

namespace SDKSample
{
    public partial class StreamGeometryPolyBezierToExample : Page
    {
        public StreamGeometryPolyBezierToExample()
        {
            // Create a path to draw a geometry with.
            Path myPath = new Path();
            myPath.Stroke = Brushes.Black;
            myPath.StrokeThickness = 1;

            // Create a StreamGeometry to use to specify myPath.
            StreamGeometry geometry = new StreamGeometry();
            geometry.FillRule = FillRule.EvenOdd;

            // Open a StreamGeometryContext that can be used to describe this StreamGeometry 
            // object's contents.
            using (StreamGeometryContext ctx = geometry.Open())
            {
                // Set the begin point of the shape.
                ctx.BeginFigure(new Point(10, 100), true /* is filled */, false /* is closed */);

                // Create a collection of Point structures that will be used with the PolyBezierTo 
                // Method to create the Bezier curve.
                List<Point> pointList = new List<Point>();

                // First Bezier curve is specified with these three points.

                // First control point for first Bezier curve.
                pointList.Add(new Point(100,0));

                // Second control point for first Bezier curve.
                pointList.Add(new Point(200, 200));

                // Destination point for first Bezier curve.
                pointList.Add(new Point(300, 100));

                // Second Bezier curve is specified with these three points.

                // First control point for second Bezier curve.
                pointList.Add(new Point(400, 0));

                // Second control point for second Bezier curve.
                pointList.Add(new Point(500, 200));

                // Destination point for second Bezier curve.
                pointList.Add(new Point(600, 100));

                // Create a Bezier curve using the collection of Point Structures.
                ctx.PolyBezierTo(pointList, true /* is stroked */, false /* is smooth join */);
            }

            // Freeze the geometry (make it unmodifiable)
            // for additional performance benefits.
            geometry.Freeze();
            
            // specify the shape (Bezier curve) of the path using the StreamGeometry.
            myPath.Data = geometry;

            // Add path shape to the UI.
            StackPanel mainPanel = new StackPanel();
            mainPanel.Children.Add(myPath);
            this.Content = mainPanel;
        }
    }
}

Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Collections.Generic

Namespace SDKSample
    Partial Public Class StreamGeometryPolyBezierToExample
        Inherits Page
        Public Sub New()
            ' Create a path to draw a geometry with.
            Dim myPath As New Path()
            myPath.Stroke = Brushes.Black
            myPath.StrokeThickness = 1

            ' Create a StreamGeometry to use to specify myPath.
            Dim geometry As New StreamGeometry()
            geometry.FillRule = FillRule.EvenOdd

            ' Open a StreamGeometryContext that can be used to describe this StreamGeometry 
            ' object's contents.
            Using ctx As StreamGeometryContext = geometry.Open()
                ' Set the begin point of the shape.
                ctx.BeginFigure(New Point(10, 100), True, False) ' is closed  -  is filled 

                ' Create a collection of Point structures that will be used with the PolyBezierTo 
                ' Method to create the Bezier curve.
                Dim pointList As New List(Of Point)()

                ' First Bezier curve is specified with these three points.

                ' First control point for first Bezier curve.
                pointList.Add(New Point(100,0))

                ' Second control point for first Bezier curve.
                pointList.Add(New Point(200, 200))

                ' Destination point for first Bezier curve.
                pointList.Add(New Point(300, 100))

                ' Second Bezier curve is specified with these three points.

                ' First control point for second Bezier curve.
                pointList.Add(New Point(400, 0))

                ' Second control point for second Bezier curve.
                pointList.Add(New Point(500, 200))

                ' Destination point for second Bezier curve.
                pointList.Add(New Point(600, 100))

                ' Create a Bezier curve using the collection of Point Structures.
                ctx.PolyBezierTo(pointList, True, False) ' is smooth join  -  is stroked 

            End Using

            ' Freeze the geometry (make it unmodifiable)
            ' for additional performance benefits.
            geometry.Freeze()

            ' specify the shape (Bezier curve) of the path using the StreamGeometry.
            myPath.Data = geometry

            ' Add path shape to the UI.
            Dim mainPanel As New StackPanel()
            mainPanel.Children.Add(myPath)
            Me.Content = mainPanel
        End Sub
    End Class
End Namespace

Opmerkingen

Het eerste punt in points specificeert het eerste besturingspunt, de volgende specificeert het tweede besturingspunt, het derde punt het eindpunt, het volgende punt specificeert het eerste besturingspunt van de volgende curve, enzovoort.

Deze methode gebruikt het eindpunt van het vorige segment als uitgangspunt. Als dit het eerste segment in een afbeelding is, wordt het punt gebruikt dat door de BeginFigure methode is opgegeven als beginpunt.

Een StreamGeometry kan niet worden geserialiseerd als deze een Transform of meer niet-gestreken of niet-gevulde segmenten bevat.

Zie ook

• ArcTo(Point, Size, Double, Boolean, SweepDirection, Boolean, Boolean)
• BezierTo(Point, Point, Point, Boolean, Boolean)
• QuadraticBezierTo(Point, Point, Boolean, Boolean)
• PolyQuadraticBezierTo(IList<Point>, Boolean, Boolean)