PolyQuadraticBezierSegment 类

定义

命名空间:

Windows.UI.Xaml.Media

表示一系列二次贝塞尔线段。

public ref class PolyQuadraticBezierSegment sealed : PathSegment

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.UI.Xaml.Markup.ContentProperty(Name="Points")]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class PolyQuadraticBezierSegment final : PathSegment

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.UI.Xaml.Markup.ContentProperty(Name="Points")]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class PolyQuadraticBezierSegment : PathSegment

Public NotInheritable Class PolyQuadraticBezierSegment
Inherits PathSegment

<PolyQuadraticBezierSegment .../>

继承

Object Platform::Object IInspectable DependencyObject PathSegment PolyQuadraticBezierSegment

属性

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute ContentPropertyAttribute

Windows 要求

设备系列	Windows 10 (在 10.0.10240.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v1.0 中引入)

示例

此示例使用 PolyQuadraticBezierSegment 创建两条曲线来指定坐标。

<Canvas>
    <Path Stroke="Black" StrokeThickness="4">
        <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>

构造函数

PolyQuadraticBezierSegment()

初始化 PolyQuadraticBezierSegment 类的新实例。

属性

Dispatcher	获取与此 对象关联的 CoreDispatcher 。 CoreDispatcher 表示可以访问 UI 线程上的 DependencyObject 的工具，即使代码是由非 UI 线程启动的。 (继承自 DependencyObject)
Points	获取或设置定义此 PolyQuadraticBezierSegment 对象的 Point 集合。
PointsProperty	标识 Points 依赖属性。

方法

ClearValue(DependencyProperty)	清除依赖属性的本地值。 (继承自 DependencyObject)
GetAnimationBaseValue(DependencyProperty)	返回为依赖属性建立的任何基值，该基值适用于动画未处于活动状态的情况。 (继承自 DependencyObject)
GetValue(DependencyProperty)	从 DependencyObject 返回依赖属性的当前有效值。 (继承自 DependencyObject)
ReadLocalValue(DependencyProperty)	如果设置了本地值，则返回依赖属性的本地值。 (继承自 DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)	注册一个通知函数，用于侦听此 DependencyObject 实例上特定 DependencyProperty 的更改。 (继承自 DependencyObject)
SetValue(DependencyProperty, Object)	设置 DependencyObject 上依赖属性的本地值。 (继承自 DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)	取消以前通过调用 RegisterPropertyChangedCallback 注册的更改通知。 (继承自 DependencyObject)

另请参阅

• PathSegment
• QuadraticBezierSegment
• Path
• PathGeometry
• 基于 XAML 矢量的绘图示例
• 绘制图形