DragEvent Class
Definition
Important
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Represents an event that is sent out by the system at various times during a drag and drop operation.
[Android.Runtime.Register("android/view/DragEvent", DoNotGenerateAcw=true)]
public class DragEvent : Java.Lang.Object, Android.OS.IParcelable, IDisposable, Java.Interop.IJavaPeerable[<Android.Runtime.Register("android/view/DragEvent", DoNotGenerateAcw=true)>]
type DragEvent = class
inherit Object
interface IParcelable
interface IJavaObject
interface IDisposable
interface IJavaPeerable- Inheritance
- Attributes
- Implements
Remarks
Represents an event that is sent out by the system at various times during a drag and drop operation. It is a data structure that contains several important pieces of data about the operation and the underlying data.
View objects that receive a DragEvent call #getAction(), which returns an action type that indicates the state of the drag and drop operation. This allows a View object to react to a change in state by changing its appearance or performing other actions. For example, a View can react to the #ACTION_DRAG_ENTERED action type by by changing one or more colors in its displayed image.
During a drag and drop operation, the system displays an image that the user drags. This image is called a drag shadow. Several action types reflect the position of the drag shadow relative to the View receiving the event.
Most methods return valid data only for certain event actions. This is summarized in the following table. Each possible #getAction() value is listed in the first column. The other columns indicate which method or methods return valid data for that getAction() value:
<table> <tr> <th scope="col">getAction() Value</th> <th scope="col">getClipDescription()</th> <th scope="col">getLocalState()</th> <th scope="col">getX()</th> <th scope="col">getY()</th> <th scope="col">getClipData()</th> <th scope="col">getResult()</th> </tr> <tr> <td>ACTION_DRAG_STARTED</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> </tr> <tr> <td>ACTION_DRAG_ENTERED</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> </tr> <tr> <td>ACTION_DRAG_LOCATION</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> </tr> <tr> <td>ACTION_DRAG_EXITED</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> </tr> <tr> <td>ACTION_DROP</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;">X</td> <td style="text-align: center;"> </td> </tr> <tr> <td>ACTION_DRAG_ENDED</td> <td style="text-align: center;"> </td> <td style="text-align: center;">X</td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> <td style="text-align: center;"> </td> <td style="text-align: center;">X</td> </tr> </table>
The android.view.DragEvent#getAction(), android.view.DragEvent#getLocalState()android.view.DragEvent#describeContents(), android.view.DragEvent#writeToParcel(Parcel,int), and android.view.DragEvent#toString() methods always return valid data.
<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.DragEvent.
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
| DragEvent(IntPtr, JniHandleOwnership) |
A constructor used when creating managed representations of JNI objects; called by the runtime. |
Properties
| Action |
Inspect the action value of this event. |
| Class |
Returns the runtime class of this |
| ClipData |
Returns the |
| ClipDescription |
Returns the |
| Creator |
A container for creating a DragEvent from a Parcel. |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| JniIdentityHashCode | (Inherited from Object) |
| JniPeerMembers | |
| LocalState |
Returns the local state object sent to the system as part of the call to
|
| PeerReference | (Inherited from Object) |
| Result |
Returns an indication of the result of the drag and drop operation. |
| 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. |
Methods
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| DescribeContents() |
Returns information about the |
| 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) |
| GetX() |
Gets the X coordinate of the drag point. |
| GetY() |
Gets the Y coordinate of the drag point. |
| 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) |
| 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, 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) |
| 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) |
| WriteToParcel(Parcel, ParcelableWriteFlags) |
Creates a |
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) | |