BitmapCacheBrush 類別

定義

使用快取的內容來繪製區域。Paints an area with cached content.

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

範例

下列程式碼範例顯示如何將與產生關聯 BitmapCache BitmapCacheBrushThe following code example shows how to associate a BitmapCache with a BitmapCacheBrush. 您可以使用 BitmapCacheBrush 多個元素上的資源,並達到良好的效能。You can use the BitmapCacheBrush resource on multiple elements and achieve good performance. 如需完整的程式代碼清單,請參閱 如何:使用快取的元素做為筆刷For the complete code listing, see How to: Use a Cached Element as a Brush.

<Window.Resources>
    <RichTextBox x:Key="cachedRichTextBox"  >
        <RichTextBox.CacheMode>
            <BitmapCache EnableClearType="True" RenderAtScale="1" SnapsToDevicePixels="True" />
        </RichTextBox.CacheMode>
    </RichTextBox>

    <BitmapCacheBrush x:Key="cachedRichTextBoxBrush" Target="{StaticResource cachedRichTextBox}">
        <BitmapCacheBrush.BitmapCache>
            <BitmapCache EnableClearType="False" RenderAtScale="0.4" SnapsToDevicePixels="False" />
        </BitmapCacheBrush.BitmapCache>
    </BitmapCacheBrush>        
</Window.Resources>

備註

使用 BitmapCacheBrush 類別來有效率地重複使用快取的元素。Use the BitmapCacheBrush class to reuse a cached element efficiently. 當您需要在多個元素上繪製複雜內容時,這會很有用。This is useful when you need to paint complex content onto multiple elements. 使用 BitmapCache 類別來快取複雜的元素。Use the BitmapCache class to cache a complex element.

將指派給 Visual Target 屬性,並選擇性地將指派給 BitmapCache BitmapCache 屬性。Assign a Visual to the Target property and optionally assign a BitmapCache to the BitmapCache property. CacheMode筆刷和目標互動的會 Visual 產生不同的行為。The CacheMode of the brush and the target Visual interact to produce different behaviors. 下表描述此互動。The following table describes this interaction.

目標沒有 CacheModeTarget has no CacheMode 目標具有 CacheModeTarget has CacheMode
筆刷沒有 CacheModeBrush has no CacheMode 目標視覺效果正常呈現;筆刷會使用預設快取行為。Target visual renders normally; brush uses default cache behavior. 目標視覺效果會轉譯成自己的快取;轉譯時,筆刷會使用目標的快取。Target visual renders into its own cache; brush uses target's cache when rendering.
筆刷具有 CacheModeBrush has CacheMode 目標視覺效果正常呈現;筆刷會將目標轉譯成自己的快取,並使用此呈現。Target visual renders normally; brush renders target into its own cache and uses this to render. 目標視覺效果會轉譯成自己的快取;筆刷會將目標轉譯為筆刷本身的快取,並使用此來呈現。Target visual renders into its own cache; brush renders target into brush's own cache and uses this to render.

BitmapCacheBrush類別與 VisualBrush 類別類似,但一律會從目標專案上的快取 BitmapCacheBrush ,或由屬性所定義的快取來呈現 BitmapCacheThe BitmapCacheBrush class is similar to the VisualBrush class, but BitmapCacheBrush always renders from a cache on the target element, or from a cache defined by the BitmapCache property. BitmapCacheBrush類別也支援已變更的區域。The BitmapCacheBrush class also supports dirty regions.

下表顯示類別的預設點陣圖快取設定 BitmapCacheBrushThe following table shows the default bitmap cache settings for the BitmapCacheBrush class.

點陣圖快取屬性Bitmap Cache Property 預設值Default Setting
SnapsToDevicePixels false
EnableClearType false
RenderAtScale 11

SnapsToDevicePixels類別會忽略屬性 BitmapCacheBrushThe SnapsToDevicePixels property is ignored by the BitmapCacheBrush class.

BitmapCacheBrush類別會忽略根目錄上的下列屬性 VisualThe BitmapCacheBrush class ignores the following properties on the root Visual. 這個行為與類別不同 VisualBrushThis behavior differs from the VisualBrush class.

建構函式

BitmapCacheBrush()

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

BitmapCacheBrush(Visual)

使用指定的 BitmapCacheBrush 初始化 Visual 類別的新執行個體。Initializes a new instance of the BitmapCacheBrush class with the specified Visual.

欄位

AutoLayoutContentProperty

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

BitmapCacheProperty

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

TargetProperty

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

屬性

AutoLayoutContent

取得或設定值,這個值指出配置是否要套用至這個筆刷的內容。Gets or sets a value that indicates whether layout is applied to the contents of this brush.

BitmapCache

取得或設定表示快取內容的 CacheModeGets or sets a CacheMode that represents cached content.

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)
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)
Opacity

取得或設定 Brush 的不透明度。Gets or sets the degree of opacity of a Brush.

(繼承來源 Brush)
RelativeTransform

取得或設定使用相對座標套用到筆刷的轉換。Gets or sets the transformation that is applied to the brush using relative coordinates.

(繼承來源 Brush)
Target

取得或設定要快取的目標視覺化部分。Gets or sets the target visual to cache.

Transform

取得或設定套用到筆刷的轉換。Gets or sets the transformation that is applied to the brush. 在已經對應及定位筆刷輸出之後,套用這個轉換。This transformation is applied after the brush's output has been mapped and positioned.

(繼承來源 Brush)

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 BitmapCacheBrush 的可修改複製,製作這個物件值的深層複製。Creates a modifiable clone of the BitmapCacheBrush, making deep copies of the object's values. 當複製這個物件的相依性屬性時,這個方法會複製運算式 (但可能已不再解析),但不會複製動畫或其目前值。When copying the object's dependency properties, this method copies expressions (which 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()

使用 BitmapCacheBrush 的目前值,建立它的可修改複製品 (深層複本)。Creates a modifiable clone (deep copy) of the BitmapCacheBrush using its current values.

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()

傳回這個 Brush 的字串表示。Return string representation of this Brush.

(繼承來源 Brush)
ToString(IFormatProvider)

根據指定的文化特性特定格式資訊,建立這個物件的字串表示。Creates a string representation of this object based on the specified culture-specific formatting information.

(繼承來源 Brush)
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)

明確介面實作

IFormattable.ToString(String, IFormatProvider)

使用指定的格式,格式化目前執行個體的值。Formats the value of the current instance using the specified format.

(繼承來源 Brush)

適用於

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