View.DragShadowBuilder Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Creates an image that the system displays during the drag and drop operation.
[Android.Runtime.Register("android/view/View$DragShadowBuilder", DoNotGenerateAcw=true)]
public class View.DragShadowBuilder : Java.Lang.Object[<Android.Runtime.Register("android/view/View$DragShadowBuilder", DoNotGenerateAcw=true)>]
type View.DragShadowBuilder = class
inherit Object- Inheritance
- Attributes
Remarks
Creates an image that the system displays during the drag and drop operation. This is called a "drag shadow". The default implementation for a DragShadowBuilder based on a View returns an image that has exactly the same appearance as the given View. The default also positions the center of the drag shadow directly under the touch point. If no View is provided (the constructor with no parameters is used), and #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics() and #onDrawShadow(Canvas) onDrawShadow() are not overridden, then the default is an invisible drag shadow.
You are not required to use the View you provide to the constructor as the basis of the drag shadow. The #onDrawShadow(Canvas) onDrawShadow() method allows you to draw anything you want as the drag shadow.
You pass a DragShadowBuilder object to the system when you start the drag. The system calls #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics() to get the size and position of the drag shadow. It uses this data to construct a android.graphics.Canvas object, then it calls #onDrawShadow(Canvas) onDrawShadow() so that your application can draw the shadow image in the Canvas.
<div class="special reference"> <h3>Developer Guides</h3>
For a guide to implementing drag and drop features, read the Drag and Drop developer guide.
</div>
Java documentation for android.view.View.DragShadowBuilder.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Constructors
| View.DragShadowBuilder() |
Construct a shadow builder object with no associated View. |
| View.DragShadowBuilder(IntPtr, JniHandleOwnership) |
A constructor used when creating managed representations of JNI objects; called by the runtime. |
| View.DragShadowBuilder(View) |
Constructs a shadow image builder based on a View. |
Properties
| Class |
Returns the runtime class of this |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| JniIdentityHashCode | (Inherited from Object) |
| JniPeerMembers | |
| PeerReference | (Inherited from Object) |
| ThresholdClass |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. |
| ThresholdType |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. |
| View |
Returns the View object that had been passed to the
|
Methods
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| Dispose() | (Inherited from Object) |
| Dispose(Boolean) | (Inherited from Object) |
| Equals(Object) |
Indicates whether some other object is "equal to" this one. (Inherited from Object) |
| GetHashCode() |
Returns a hash code value for the object. (Inherited from Object) |
| JavaFinalize() |
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) |
| Notify() |
Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object) |
| NotifyAll() |
Wakes up all threads that are waiting on this object's monitor. (Inherited from Object) |
| OnDrawShadow(Canvas) |
Draws the shadow image. |
| OnProvideShadowMetrics(Point, Point) |
Provides the metrics for the shadow image. |
| SetHandle(IntPtr, JniHandleOwnership) |
Sets the Handle property. (Inherited from Object) |
| ToArray<T>() | (Inherited from Object) |
| ToString() |
Returns a string representation of the object. (Inherited from Object) |
| UnregisterFromRuntime() | (Inherited from Object) |
| Wait() |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object) |
| Wait(Int64) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Wait(Int64, Int32) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
Explicit Interface Implementations
| IJavaPeerable.Disposed() | (Inherited from Object) |
| IJavaPeerable.DisposeUnlessReferenced() | (Inherited from Object) |
| IJavaPeerable.Finalized() | (Inherited from Object) |
| IJavaPeerable.JniManagedPeerState | (Inherited from Object) |
| IJavaPeerable.SetJniIdentityHashCode(Int32) | (Inherited from Object) |
| IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates) | (Inherited from Object) |
| IJavaPeerable.SetPeerReference(JniObjectReference) | (Inherited from Object) |
Extension Methods
| JavaCast<TResult>(IJavaObject) |
Performs an Android runtime-checked type conversion. |
| JavaCast<TResult>(IJavaObject) | |
| GetJniTypeName(IJavaPeerable) | |