PreProcessInputEventArgs Class
Definition
Important
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Provides data for preprocess input events.
public ref class PreProcessInputEventArgs sealed : System::Windows::Input::ProcessInputEventArgspublic sealed class PreProcessInputEventArgs : System.Windows.Input.ProcessInputEventArgstype PreProcessInputEventArgs = class
inherit ProcessInputEventArgsPublic NotInheritable Class PreProcessInputEventArgs
Inherits ProcessInputEventArgs- Inheritance
Remarks
Canceling a pre-process input stops the input from being processed further. Listen for the PreNotifyInput to determine if another handler canceled a pre-process input.
The input staging area processes input into WPF events.
All PreProcessInput event handlers are called, even if one of the handlers cancels the input. To verify if a handler further up the tree canceled the input, listen for the PreNotifyInput event.
PreProcessInputEventArgs is used with the PreProcessInput event.
Input is processed in WPF in the follow stages:
Pre-process stage. The input manager raises the PreProcessInput event.
Pre-notify stage. The input manager raises the PreNotifyInput event.
The WPF input event or events are raised.
Post-notify stage. The input manager raises the PostNotifyInput event.
Post-process stage. The input manager raises the PostProcessInput event.
Properties
| Canceled |
Determines whether processing of the input event was canceled. |
| InputManager |
Gets the input manager processing the input event. (Inherited from NotifyInputEventArgs) |
| StagingItem |
Gets the staging area input item being processed by the input manager. (Inherited from NotifyInputEventArgs) |
Methods
| Cancel() |
Cancels the processing of the input event. |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| PeekInput() |
Gets, but does not pop, the input event on the top of the staging area stack. (Inherited from ProcessInputEventArgs) |
| PopInput() |
Removes the input event off the top of the staging area stack. (Inherited from ProcessInputEventArgs) |
| PushInput(InputEventArgs, StagingAreaInputItem) |
Puts the specified input event onto the top of the specified staging area stack. (Inherited from ProcessInputEventArgs) |
| PushInput(StagingAreaInputItem) |
Puts the specified input event onto the top of the staging area stack. (Inherited from ProcessInputEventArgs) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
