PolyQuadraticBezierSegment Class

Reference

Definition

Namespace:: System.Windows.Media

Assembly:: PresentationCore.dll

Important

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Represents a set of quadratic Bezier segments.

public ref class PolyQuadraticBezierSegment sealed : System::Windows::Media::PathSegment

public sealed class PolyQuadraticBezierSegment : System.Windows.Media.PathSegment

type PolyQuadraticBezierSegment = class
    inherit PathSegment

Public NotInheritable Class PolyQuadraticBezierSegment
Inherits PathSegment

Inheritance: Object

DispatcherObject

DependencyObject

Freezable

Animatable

PathSegment
PolyQuadraticBezierSegment

Examples

The following example shows how to use PolyQuadraticBezierSegment to create two quadratic Bezier curve segments.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <StackPanel>
    <Canvas>
      <Path Stroke="Black" StrokeThickness="1">
        <Path.Data>
          <PathGeometry>
            <PathGeometry.Figures>
              <PathFigureCollection>

                <!-- The StartPoint specifies the starting point of the first curve. -->
                <PathFigure StartPoint="10,100">
                  <PathFigure.Segments>
                    <PathSegmentCollection>

                      <!-- The PolyQuadraticBezierSegment specifies two Bezier curves.
                           The first curve is from 10,100 (start point specified above)
                           to 300,100 with a control point of 200,200. The second curve
                           is from 200,200 (end of the last curve) to 30,400 with a 
                           control point of 0,200. -->
                      <PolyQuadraticBezierSegment Points="200,200 300,100 0,200 30,400" />
                    </PathSegmentCollection>
                  </PathFigure.Segments>
                </PathFigure>
              </PathFigureCollection>
            </PathGeometry.Figures>
          </PathGeometry>
        </Path.Data>
      </Path>
    </Canvas>
  </StackPanel>
</Page>

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

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

            // Create a PathFigure to be used for the PathGeometry of myPath.
            PathFigure myPathFigure = new PathFigure();

            // Set the starting point for the PathFigure specifying that the
            // geometry starts at point 10,100.
            myPathFigure.StartPoint = new Point(10, 100);

            // Create a PointCollection that holds the Points used to specify 
            // the points of the PolyQuadraticBezierSegment below.
            PointCollection myPointCollection = new PointCollection(4);
            myPointCollection.Add(new Point(200, 200));
            myPointCollection.Add(new Point(300, 100));
            myPointCollection.Add(new Point(0, 200));
            myPointCollection.Add(new Point(30, 400));

            // The PolyQuadraticBezierSegment specifies two Bezier curves.
            // The first curve is from 10,100 (start point specified above)
            // to 300,100 with a control point of 200,200. The second curve
            // is from 200,200 (end of the last curve) to 30,400 with a 
            // control point of 0,200.
            PolyQuadraticBezierSegment myBezierSegment = new PolyQuadraticBezierSegment();
            myBezierSegment.Points = myPointCollection;

            PathSegmentCollection myPathSegmentCollection = new PathSegmentCollection();
            myPathSegmentCollection.Add(myBezierSegment);

            myPathFigure.Segments = myPathSegmentCollection;

            PathFigureCollection myPathFigureCollection = new PathFigureCollection();
            myPathFigureCollection.Add(myPathFigure);

            PathGeometry myPathGeometry = new PathGeometry();
            myPathGeometry.Figures = myPathFigureCollection;

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

            // specify the shape (quadratic Bezier curve) of the path using the StreamGeometry.
            myPath.Data = myPathGeometry;

            // 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 PolyQuadraticBezierSegmentExample
        Inherits Page
        Public Sub New()

            ' Create a PathFigure to be used for the PathGeometry of myPath.
            Dim myPathFigure As New PathFigure()

            ' Set the starting point for the PathFigure specifying that the
            ' geometry starts at point 10,100.
            myPathFigure.StartPoint = New Point(10, 100)

            ' Create a PointCollection that holds the Points used to specify 
            ' the points of the PolyQuadraticBezierSegment below.
            Dim myPointCollection As New PointCollection(4)
            myPointCollection.Add(New Point(200, 200))
            myPointCollection.Add(New Point(300, 100))
            myPointCollection.Add(New Point(0, 200))
            myPointCollection.Add(New Point(30, 400))

            ' The PolyQuadraticBezierSegment specifies two Bezier curves.
            ' The first curve is from 10,100 (start point specified above)
            ' to 300,100 with a control point of 200,200. The second curve
            ' is from 200,200 (end of the last curve) to 30,400 with a 
            ' control point of 0,200.
            Dim myBezierSegment As New PolyQuadraticBezierSegment()
            myBezierSegment.Points = myPointCollection

            Dim myPathSegmentCollection As New PathSegmentCollection()
            myPathSegmentCollection.Add(myBezierSegment)

            myPathFigure.Segments = myPathSegmentCollection

            Dim myPathFigureCollection As New PathFigureCollection()
            myPathFigureCollection.Add(myPathFigure)

            Dim myPathGeometry As New PathGeometry()
            myPathGeometry.Figures = myPathFigureCollection

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

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

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

Remarks

This class enables you to specify a collection of points to create multiple quadratic Bezier curve segments. With a QuadraticBezierSegment, you can specify only two points to create a single quadratic Bezier curve segment.

Constructors

PolyQuadraticBezierSegment()	Initializes a new instance of the PolyQuadraticBezierSegment class.
PolyQuadraticBezierSegment(IEnumerable<Point>, Boolean)	Initializes a new instance of the PolyQuadraticBezierSegment class with the specified collection of Point objects and a value specifying whether the segments are stroked.

Fields

PointsProperty

Identifies the Points dependency property.

Properties

CanFreeze	Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable)
DependencyObjectType	Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject)
Dispatcher	Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject)
HasAnimatedProperties	Gets a value that indicates whether one or more AnimationClock objects is associated with any of this object's dependency properties. (Inherited from Animatable)
IsFrozen	Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable)
IsSealed	Gets a value that indicates whether this instance is currently sealed (read-only). (Inherited from DependencyObject)
IsSmoothJoin	Gets or sets a value that indicates whether the join between this PathSegment and the previous PathSegment is treated as a corner when it is stroked with a Pen. (Inherited from PathSegment)
IsStroked	Gets or sets a value that indicates whether the segment is stroked. (Inherited from PathSegment)
Points	Gets or sets the PointCollection that defines this PolyQuadraticBezierSegment object.

Methods

ApplyAnimationClock(DependencyProperty, AnimationClock)	Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the SnapshotAndReplace handoff behavior is used. (Inherited from Animatable)
ApplyAnimationClock(DependencyProperty, AnimationClock, HandoffBehavior)	Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable)
BeginAnimation(DependencyProperty, AnimationTimeline)	Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the SnapshotAndReplace handoff behavior is used. (Inherited from Animatable)
BeginAnimation(DependencyProperty, AnimationTimeline, HandoffBehavior)	Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable)
CheckAccess()	Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject)
ClearValue(DependencyProperty)	Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject)
ClearValue(DependencyPropertyKey)	Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject)
Clone()	Creates a modifiable clone of this PolyQuadraticBezierSegment, making deep copies of this object's values. When copying dependency properties, this method copies resource references and data bindings (but they might no longer resolve) but not animations or their current values.
CloneCore(Freezable)	Makes the instance a clone (deep copy) of the specified Freezable using base (non-animated) property values. (Inherited from Freezable)
CloneCurrentValue()	Creates a modifiable clone of this PolyQuadraticBezierSegment object, making deep copies of this object's current values. Resource references, data bindings, and animations are not copied, but their current values are.
CloneCurrentValueCore(Freezable)	Makes the instance a modifiable clone (deep copy) of the specified Freezable using current property values. (Inherited from Freezable)
CoerceValue(DependencyProperty)	Coerces the value of the specified dependency property. This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject. (Inherited from DependencyObject)
CreateInstance()	Initializes a new instance of the Freezable class. (Inherited from Freezable)
CreateInstanceCore()	When implemented in a derived class, creates a new instance of the Freezable derived class. (Inherited from Freezable)
Equals(Object)	Determines whether a provided DependencyObject is equivalent to the current DependencyObject. (Inherited from DependencyObject)
Freeze()	Makes the current object unmodifiable and sets its IsFrozen property to `true`. (Inherited from Freezable)
FreezeCore(Boolean)	Makes this Animatable object unmodifiable or determines whether it can be made unmodifiable. (Inherited from Animatable)
GetAnimationBaseValue(DependencyProperty)	Returns the non-animated value of the specified DependencyProperty. (Inherited from Animatable)
GetAsFrozen()	Creates a frozen copy of the Freezable, using base (non-animated) property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable)
GetAsFrozenCore(Freezable)	Makes the instance a frozen clone of the specified Freezable using base (non-animated) property values. (Inherited from Freezable)
GetCurrentValueAsFrozen()	Creates a frozen copy of the Freezable using current property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable)
GetCurrentValueAsFrozenCore(Freezable)	Makes the current instance a frozen clone of the specified Freezable. If the object has animated dependency properties, their current animated values are copied. (Inherited from Freezable)
GetHashCode()	Gets a hash code for this DependencyObject. (Inherited from DependencyObject)
GetLocalValueEnumerator()	Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject)
GetType()	Gets the Type of the current instance. (Inherited from Object)
GetValue(DependencyProperty)	Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject)
InvalidateProperty(DependencyProperty)	Re-evaluates the effective value for the specified dependency property. (Inherited from DependencyObject)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
OnChanged()	Called when the current Freezable object is modified. (Inherited from Freezable)
OnFreezablePropertyChanged(DependencyObject, DependencyObject)	Ensures that appropriate context pointers are established for a DependencyObjectType data member that has just been set. (Inherited from Freezable)
OnFreezablePropertyChanged(DependencyObject, DependencyObject, DependencyProperty)	This member supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code. (Inherited from Freezable)
OnPropertyChanged(DependencyPropertyChangedEventArgs)	Overrides the DependencyObject implementation of OnPropertyChanged(DependencyPropertyChangedEventArgs) to also invoke any Changed handlers in response to a changing dependency property of type Freezable. (Inherited from Freezable)
ReadLocalValue(DependencyProperty)	Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject)
ReadPreamble()	Ensures that the Freezable is being accessed from a valid thread. Inheritors of Freezable must call this method at the beginning of any API that reads data members that are not dependency properties. (Inherited from Freezable)
SetCurrentValue(DependencyProperty, Object)	Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject)
SetValue(DependencyProperty, Object)	Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject)
SetValue(DependencyPropertyKey, Object)	Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject)
ShouldSerializeProperty(DependencyProperty)	Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property. (Inherited from DependencyObject)
ToString()	Returns a string that represents the current object. (Inherited from Object)
VerifyAccess()	Enforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject)
WritePostscript()	Raises the Changed event for the Freezable and invokes its OnChanged() method. Classes that derive from Freezable should call this method at the end of any API that modifies class members that are not stored as dependency properties. (Inherited from Freezable)
WritePreamble()	Verifies that the Freezable is not frozen and that it is being accessed from a valid threading context. Freezable inheritors should call this method at the beginning of any API that writes to data members that are not dependency properties. (Inherited from Freezable)

Events

Changed

Occurs when the Freezable or an object it contains is modified.

(Inherited from Freezable)

Applies to

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