ArcSegment 類別

定義

表示兩個點之間的橢圓形弧線。Represents an elliptical arc between two points.

public ref class ArcSegment sealed : System::Windows::Media::PathSegment
public sealed class ArcSegment : System.Windows.Media.PathSegment
type ArcSegment = class
    inherit PathSegment
Public NotInheritable Class ArcSegment
Inherits PathSegment
繼承

備註

使用 PathFigure 物件來儲存 ArcSegment 物件和其他區段。Use a PathFigure object to store ArcSegment objects and other segments.

橢圓形弧線是由其起點和終點、X 軸和 y 半徑、X 軸旋轉因數、表示弧線是否應大於180度的值,以及描述弧線繪製方向的值所定義。An elliptical arc is defined by its start and end points, x- and y-radius, x-axis rotation factor, a value indicating whether the arc should be greater than 180 degrees, and a value describing the direction in which the arc is drawn. ArcSegment類別不包含 arc 起點的屬性,它只會定義它所代表之弧線的目的地點。The ArcSegment class does not contain a property for the starting point of the arc; it only defines the destination point of the arc it represents. 弧線的起點是 PathFigure 要加入之的目前點 ArcSegmentThe beginning point of the arc is the current point of the PathFigure to which the ArcSegment is added.

下圖說明不同的端點、 SizeRotationAngle 設定。The following illustrations demonstrate the different end point, Size, and RotationAngle settings.

具有不同 Point 設定的 ArcSegmentArcSegments with different Point settings

具有不同 Size 設定的 ArcSegmentArcSegments with different Size settings

具有不同 RotationAngle 設定的 ArcSegmentArcSegments with different RotationAngle settings

IsLargeArc 和 SweepDirectionIsLargeArc and SweepDirection

針對特定位置、大小和旋轉的大部分弧形,可以繪製四個不同的弧線; IsLargeArcSweepDirection 屬性會指出要使用的弧線。For most arcs of a particular position, size, and rotation, there are four different arcs that can be drawn; the IsLargeArc and SweepDirection properties indicate which arc to use.

在四個候選的弧線掃描中,兩個代表具有180度或更大量的大型弧線,而兩個代表較小的弧形,其掃描180度或更少。Of the four candidate arc sweeps, two represent large arcs with sweeps of 180 degrees or greater, and two represent smaller arcs with sweeps 180 degrees or less. 如果 IsLargeArctrue ,則會選擇兩個較大的弧線掃描之一; 如果為,則會 false 選擇其中一個較小的弧線掃描。If IsLargeArc is true, then one of the two larger arc sweeps is chosen; otherwise, if is false, one of the smaller arc sweeps is chosen. 剩餘的兩個 arc 候選項目會以不同的方向繪製: CounterclockwiseClockwiseThe remaining two arc candidates are each drawn in a different direction: Counterclockwise or Clockwise. SweepDirection屬性會指定要使用哪一個。The SweepDirection property specifies which one to use.

下圖顯示不同的 IsLargeArcSweepDirection 設定。The following illustrations show different IsLargeArc and SweepDirection settings.

具有不同 IsLargeArc 設定的 ArcSegmentArcSegments with different IsLargeArc settings
ArcSegment 具有不同 IsLargeArc 設定的物件ArcSegment objects with different IsLargeArc settings

具有不同 SweepDirection 設定的 ArcSegmentArcSegments with different SweepDirection settings
ArcSegment 具有不同 SweepDirection 設定的物件ArcSegment objects with different SweepDirection settings

Freezable 功能Freezable Features

ArcSegment是物件的類型 FreezableAn ArcSegment is a type of Freezable object. 如需功能的相關資訊 Freezable ,例如凍結和複製,請參閱可 凍結的物件總覽For information about Freezable features, such as freezing and cloning, see the Freezable Objects Overview.

建構函式

ArcSegment()

初始化 ArcSegment 類別的新執行個體。Initializes a new instance of the ArcSegment class.

ArcSegment(Point, Size, Double, Boolean, SweepDirection, Boolean)

初始化 ArcSegment 類別的新執行個體。Initializes a new instance of the ArcSegment class.

欄位

IsLargeArcProperty

識別 IsLargeArc 相依性屬性。Identifies the IsLargeArc dependency property.

PointProperty

識別 Point 相依性屬性。Identifies the Point dependency property.

RotationAngleProperty

識別 RotationAngle 相依性屬性。Identifies the RotationAngle dependency property.

SizeProperty

識別 Size 相依性屬性。Identifies the Size dependency property.

SweepDirectionProperty

識別 SweepDirection 相依性屬性。Identifies the SweepDirection dependency property.

屬性

CanFreeze

取得值,指出是否可以將物件設為不可修改。Gets a value that indicates whether the object can be made unmodifiable.

(繼承來源 Freezable)
DependencyObjectType

取得包裝此執行個體之 CLRCLR 型別的 DependencyObjectTypeGets the DependencyObjectType that wraps the CLRCLR type of this instance.

(繼承來源 DependencyObject)
Dispatcher

取得與這個 Dispatcher 關聯的 DispatcherObjectGets the Dispatcher this DispatcherObject is associated with.

(繼承來源 DispatcherObject)
HasAnimatedProperties

取得值,這個值表示是否有一個或多個 AnimationClock 物件與這個物件的任何一個相依性屬性相關聯。Gets a value that indicates whether one or more AnimationClock objects is associated with any of this object's dependency properties.

(繼承來源 Animatable)
IsFrozen

取得值,該值表示物件目前是否可修改。Gets a value that indicates whether the object is currently modifiable.

(繼承來源 Freezable)
IsLargeArc

取得或設定值,指出弧形是否應大於 180 度。Gets or sets a value that indicates whether the arc should be greater than 180 degrees.

IsSealed

取得值,這個值表示此執行個體目前是否已密封 (唯讀)。Gets a value that indicates whether this instance is currently sealed (read-only).

(繼承來源 DependencyObject)
IsSmoothJoin

取得或設定值,這個值表示使用 PathSegment 加上描邊時,是否將這個 PathSegment 與前一個 Pen 之間的聯結視為邊角。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.

(繼承來源 PathSegment)
IsStroked

取得或設定值,這個值表示是否將片段描邊。Gets or sets a value that indicates whether the segment is stroked.

(繼承來源 PathSegment)
Point

取得或設定橢圓形弧線的端點。Gets or sets the endpoint of the elliptical arc.

RotationAngle

取得或設定橢圓形繞著 X 軸旋轉的量 (以度為單位)。Gets or sets the amount (in degrees) by which the ellipse is rotated about the x-axis.

Size

取得或設定作為 Size 結構之弧線的 X 和 Y 半徑。Gets or sets the x- and y-radius of the arc as a Size structure.

SweepDirection

取得或設定值,指定是否在 ClockwiseCounterclockwise 方向繪製弧形。Gets or sets a value that specifies whether the arc is drawn in the Clockwise or Counterclockwise direction.

方法

ApplyAnimationClock(DependencyProperty, AnimationClock)

AnimationClock 套用至指定的 DependencyPropertyApplies an AnimationClock to the specified DependencyProperty. 如果屬性已有動畫效果,即使用 SnapshotAndReplace 遞移式行為。If the property is already animated, the SnapshotAndReplace handoff behavior is used.

(繼承來源 Animatable)
ApplyAnimationClock(DependencyProperty, AnimationClock, HandoffBehavior)

AnimationClock 套用至指定的 DependencyPropertyApplies an AnimationClock to the specified DependencyProperty. 如果已建立屬性的動畫,則會使用指定的 HandoffBehaviorIf the property is already animated, the specified HandoffBehavior is used.

(繼承來源 Animatable)
BeginAnimation(DependencyProperty, AnimationTimeline)

將動畫套用至指定的 DependencyPropertyApplies an animation to the specified DependencyProperty. 呈現下一個畫面格後,就會啟動動畫。The animation is started when the next frame is rendered. 如果指定的屬性已有動畫效果,即使用 SnapshotAndReplace 遞移式行為。If the specified property is already animated, the SnapshotAndReplace handoff behavior is used.

(繼承來源 Animatable)
BeginAnimation(DependencyProperty, AnimationTimeline, HandoffBehavior)

將動畫套用至指定的 DependencyPropertyApplies an animation to the specified DependencyProperty. 呈現下一個畫面格後,就會啟動動畫。The animation is started when the next frame is rendered. 如果已建立指定之屬性的動畫,則會使用指定的 HandoffBehaviorIf the specified property is already animated, the specified HandoffBehavior is used.

(繼承來源 Animatable)
CheckAccess()

判斷呼叫的執行是否可以存取這個 DispatcherObjectDetermines whether the calling thread has access to this DispatcherObject.

(繼承來源 DispatcherObject)
ClearValue(DependencyProperty)

清除屬性的區域數值。Clears the local value of a property. 要清除的屬性是由 DependencyProperty 識別項所指定。The property to be cleared is specified by a DependencyProperty identifier.

(繼承來源 DependencyObject)
ClearValue(DependencyPropertyKey)

清除唯讀屬性的區域數值。Clears the local value of a read-only property. 要清除的屬性是由 DependencyPropertyKey 所指定。The property to be cleared is specified by a DependencyPropertyKey.

(繼承來源 DependencyObject)
Clone()

建立這個 ArcSegment 的可修改複製品,深層複製這個物件的值。Creates a modifiable clone of this ArcSegment, making deep copies of this object's values. 當複製相依性屬性時,這個方法會複製資源參考和資料繫結 (但可能無法再解析),但不會複製動畫或它們目前的值。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)

使用基底 (非動畫) 屬性值,將執行個體設為指定 Freezable 的複製品 (深層複製)。Makes the instance a clone (deep copy) of the specified Freezable using base (non-animated) property values.

(繼承來源 Freezable)
CloneCurrentValue()

建立這個 ArcSegment 物件的可修改複製品,製作這個物件目前值的深層複本。Creates a modifiable clone of this ArcSegment object, making deep copies of this object's current values. 不會複製資源參考、資料繫結和動畫,但是會複製其目前值。Resource references, data bindings, and animations are not copied, but their current values are.

CloneCurrentValueCore(Freezable)

使用目前的屬性值,讓執行個體成為指定之 Freezable 的可修改複本 (深層複本)。Makes the instance a modifiable clone (deep copy) of the specified Freezable using current property values.

(繼承來源 Freezable)
CoerceValue(DependencyProperty)

強制轉型所指定相依性屬性的值。Coerces the value of the specified dependency property. 完成方式是叫用存在於呼叫 DependencyObject 之相依性屬性的屬性中繼資料中所指定的任何 CoerceValueCallback 函式。This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject.

(繼承來源 DependencyObject)
CreateInstance()

初始化 Freezable 類別的新執行個體。Initializes a new instance of the Freezable class.

(繼承來源 Freezable)
CreateInstanceCore()

在衍生類別中實作時,建立 Freezable 衍生類別的新執行個體。When implemented in a derived class, creates a new instance of the Freezable derived class.

(繼承來源 Freezable)
Equals(Object)

判斷提供的 DependencyObject 和目前的 DependencyObject 是否相等。Determines whether a provided DependencyObject is equivalent to the current DependencyObject.

(繼承來源 DependencyObject)
Freeze()

將目前的物件設為不可修改,並將其 IsFrozen 屬性設定為 trueMakes the current object unmodifiable and sets its IsFrozen property to true.

(繼承來源 Freezable)
FreezeCore(Boolean)

將這個 Animatable 物件設定為不可修改,或決定是否可以將它設定為不可修改。Makes this Animatable object unmodifiable or determines whether it can be made unmodifiable.

(繼承來源 Animatable)
GetAnimationBaseValue(DependencyProperty)

傳回指定之 DependencyProperty 的非動畫實值。Returns the non-animated value of the specified DependencyProperty.

(繼承來源 Animatable)
GetAsFrozen()

使用基底 (非動畫) 屬性值,建立 Freezable 的凍結複本。Creates a frozen copy of the Freezable, using base (non-animated) property values. 因為複本已凍結,所以會以傳址方式複製任何凍結子物件。Because the copy is frozen, any frozen sub-objects are copied by reference.

(繼承來源 Freezable)
GetAsFrozenCore(Freezable)

使用基底 (非動畫) 屬性值,將執行個體設為指定 Freezable 的凍結複本。Makes the instance a frozen clone of the specified Freezable using base (non-animated) property values.

(繼承來源 Freezable)
GetCurrentValueAsFrozen()

使用目前屬性值,建立 Freezable 的凍結複本。Creates a frozen copy of the Freezable using current property values. 因為複本已凍結,所以會以傳址方式複製任何凍結子物件。Because the copy is frozen, any frozen sub-objects are copied by reference.

(繼承來源 Freezable)
GetCurrentValueAsFrozenCore(Freezable)

將目前執行個體設為所指定 Freezable 的凍結複本。Makes the current instance a frozen clone of the specified Freezable. 如果物件具有動畫相依性屬性,則會複製其目前的動畫值。If the object has animated dependency properties, their current animated values are copied.

(繼承來源 Freezable)
GetHashCode()

取得這個 DependencyObject 的雜湊碼。Gets a hash code for this DependencyObject.

(繼承來源 DependencyObject)
GetLocalValueEnumerator()

建立特定的列舉值,以判斷哪些相依性屬性在此 DependencyObject 上具有本機設定的值。Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject.

(繼承來源 DependencyObject)
GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
GetValue(DependencyProperty)

傳回 DependencyObject 的這個執行個體上之相依性屬性的目前有效值。Returns the current effective value of a dependency property on this instance of a DependencyObject.

(繼承來源 DependencyObject)
InvalidateProperty(DependencyProperty)

重新評估指定相依性屬性的有效值。Re-evaluates the effective value for the specified dependency property.

(繼承來源 DependencyObject)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
OnChanged()

目前的 Freezable 物件遭到修改時進行呼叫。Called when the current Freezable object is modified.

(繼承來源 Freezable)
OnFreezablePropertyChanged(DependencyObject, DependencyObject)

確定已為剛剛設定的 DependencyObjectType 資料成員,建立適當的內容指標。Ensures that appropriate context pointers are established for a DependencyObjectType data member that has just been set.

(繼承來源 Freezable)
OnFreezablePropertyChanged(DependencyObject, DependencyObject, DependencyProperty)

這個成員支援 Windows Presentation Foundation (WPF)Windows Presentation Foundation (WPF) 基礎結構,但是您不可以從程式碼直接使用它。This member supports the Windows Presentation Foundation (WPF)Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code.

(繼承來源 Freezable)
OnPropertyChanged(DependencyPropertyChangedEventArgs)

覆寫 OnPropertyChanged(DependencyPropertyChangedEventArgs)DependencyObject 實作也可以叫用任何 Changed 處理常式,以回應類型 Freezable 的變更相依性屬性。Overrides the DependencyObject implementation of OnPropertyChanged(DependencyPropertyChangedEventArgs) to also invoke any Changed handlers in response to a changing dependency property of type Freezable.

(繼承來源 Freezable)
ReadLocalValue(DependencyProperty)

傳回相依性屬性的區域值 (如果存在)。Returns the local value of a dependency property, if it exists.

(繼承來源 DependencyObject)
ReadPreamble()

確定 Freezable 是從有效的執行緒進行存取。Ensures that the Freezable is being accessed from a valid thread. 如果 API 會讀取非相依性屬性的資料成員,則 Freezable 的繼承者必須在該 API 的開頭呼叫這個方法。Inheritors of Freezable must call this method at the beginning of any API that reads data members that are not dependency properties.

(繼承來源 Freezable)
SetCurrentValue(DependencyProperty, Object)

設定相依性屬性的值,而不需要變更其值來源。Sets the value of a dependency property without changing its value source.

(繼承來源 DependencyObject)
SetValue(DependencyProperty, Object)

設定相依性屬性的區域值 (由相依性屬性的識別碼所指定)。Sets the local value of a dependency property, specified by its dependency property identifier.

(繼承來源 DependencyObject)
SetValue(DependencyPropertyKey, Object)

設定唯讀相依性屬性的區域數值 (由相依性屬性的 DependencyPropertyKey 識別項所指定)。Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property.

(繼承來源 DependencyObject)
ShouldSerializeProperty(DependencyProperty)

傳回值,這個值表示序列化程序是否應該序列化所提供相依性屬性的值。Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property.

(繼承來源 DependencyObject)
ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(繼承來源 Object)
VerifyAccess()

請強制執行可以存取這個 DispatcherObject 的呼叫執行緒。Enforces that the calling thread has access to this DispatcherObject.

(繼承來源 DispatcherObject)
WritePostscript()

引發 FreezableChanged 事件,並叫用其 OnChanged() 方法。Raises the Changed event for the Freezable and invokes its OnChanged() method. 在任何 API 修改未以相依性屬性儲存的類別成員之後,衍生自 Freezable 的類別應該在 API 的結尾呼叫這個方法。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.

(繼承來源 Freezable)
WritePreamble()

確認 Freezable 未凍結,而且是從有效的執行緒內容進行存取。Verifies that the Freezable is not frozen and that it is being accessed from a valid threading context. 在任何 API 將資料寫入至非相依性屬性的資料成員之前,Freezable 繼承者應該在 API 的開頭呼叫這個方法。Freezable inheritors should call this method at the beginning of any API that writes to data members that are not dependency properties.

(繼承來源 Freezable)

事件

Changed

發生於 Freezable 或所含的物件遭到修改時。Occurs when the Freezable or an object it contains is modified.

(繼承來源 Freezable)

適用於

另請參閱