StreamGeometryContext.BezierTo(Point, Point, Point, Boolean, Boolean) Méthode

public:
 abstract void BezierTo(System::Windows::Point point1, System::Windows::Point point2, System::Windows::Point point3, bool isStroked, bool isSmoothJoin);

public abstract void BezierTo(System.Windows.Point point1, System.Windows.Point point2, System.Windows.Point point3, bool isStroked, bool isSmoothJoin);

abstract member BezierTo : System.Windows.Point * System.Windows.Point * System.Windows.Point * bool * bool -> unit

Public MustOverride Sub BezierTo (point1 As Point, point2 As Point, point3 As Point, isStroked As Boolean, isSmoothJoin As Boolean)

Paramètres

Exceptions

Exemples

L’exemple suivant montre comment dessiner une courbe de Bezier à l’aide de la BezierTo méthode.

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

namespace SDKSample
{
    public partial class StreamGeometryBezierToExample : Page
    {
        public StreamGeometryBezierToExample()
        {

            // 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 Bezier curve using the 3 specifed points where the first two points
                // are control points and the last point is the destination point for the curve.
                ctx.BezierTo(new Point(100, 0), new Point(200,200), new Point(300,100), 
                             true /* is stroked */, false /* is smooth join */);
            }

            // Create a path to draw a geometry with.
            Path myPath = new Path();
            myPath.Stroke = Brushes.Black;
            myPath.StrokeThickness = 1;

            // 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

Namespace SDKSample
    Partial Public Class StreamGeometryBezierToExample
        Inherits Page
        Public Sub New()

            ' 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 Bezier curve using the 3 specifed points where the first two points
                ' are control points and the last point is the destination point for the curve.
                ctx.BezierTo(New Point(100, 0), New Point(200,200), New Point(300,100), True, False) ' is smooth join  -  is stroked 

            End Using

            ' Create a path to draw a geometry with.
            Dim myPath As New Path()
            myPath.Stroke = Brushes.Black
            myPath.StrokeThickness = 1

            ' 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

Remarques

Une courbe bezier cubique est définie par un point de départ, un point de terminaison et deux points de contrôle. Le premier point de contrôle détermine la courbure du premier semestre du segment, et le deuxième point de contrôle détermine la courbure de la seconde moitié du segment.

Cette méthode utilise le point de terminaison du segment précédent comme point de départ. S’il s’agit du premier segment d’une figure, il utilise le point spécifié par la BeginFigure méthode comme point de départ.

Impossible StreamGeometry de sérialiser s’il contient un Transform segment non trait ou non rempli.

Voir aussi

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