C# Class System.Windows.Controls.InteractionHelper

The InteractionHelper provides controls with support for all of the common interactions like mouse movement, mouse clicks, key presses, etc., and also incorporates proper event semantics when the control is disabled.

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Private Properties

Property	Type	Description
OnIsEnabledChanged	void
OnIsReadOnlyChanged	void
OnLoaded	void
UpdateVisualState	void

Public Methods

Method	Description
AllowGotFocus ( RoutedEventArgs e ) : bool	Check if the control's GotFocus event should be handled.
AllowKeyDown ( KeyEventArgs e ) : bool	Check if the control's KeyDown event should be handled.
AllowKeyUp ( KeyEventArgs e ) : bool	Check if the control's KeyUp event should be handled.
AllowLostFocus ( RoutedEventArgs e ) : bool	Check if the control's LostFocus event should be handled.
AllowMouseEnter ( MouseEventArgs e ) : bool	Check if the control's MouseEnter event should be handled.
AllowMouseLeave ( MouseEventArgs e ) : bool	Check if the control's MouseLeave event should be handled.
AllowMouseLeftButtonDown ( MouseButtonEventArgs e ) : bool	Check if the control's MouseLeftButtonDown event should be handled.
AllowMouseLeftButtonUp ( MouseButtonEventArgs e ) : bool	Check if the control's MouseLeftButtonUp event should be handled.
InteractionHelper ( Control control ) : System.Diagnostics	Initializes a new instance of the InteractionHelper class.
OnApplyTemplateBase ( ) : void	Update the visual state of the control when its template is changed.
OnGotFocusBase ( ) : void	Base implementation of the virtual GotFocus event handler.
OnLostFocusBase ( ) : void	Base implementation of the virtual LostFocus event handler.
OnMouseEnterBase ( ) : void	Base implementation of the virtual MouseEnter event handler.
OnMouseLeaveBase ( ) : void	Base implementation of the virtual MouseLeave event handler.
OnMouseLeftButtonDownBase ( ) : void	Base implementation of the virtual MouseLeftButtonDown event handler.
OnMouseLeftButtonUpBase ( ) : void	Base implementation of the virtual MouseLeftButtonUp event handler.
UpdateVisualStateBase ( bool useTransitions ) : void	Update the visual state of the control.

Private Methods

Method	Description
OnIsEnabledChanged ( object sender, System.Windows.DependencyPropertyChangedEventArgs e ) : void	Handle changes to the control's IsEnabled property.
OnIsReadOnlyChanged ( bool value ) : void
OnLoaded ( object sender, RoutedEventArgs e ) : void	Handle the control's Loaded event.
UpdateVisualState ( bool useTransitions ) : void	Update the visual state of the control. UpdateVisualState works differently than the rest of the injected functionality. Most of the other events are overridden by the calling class which calls Allow, does what it wants, and then calls Base. UpdateVisualState is the opposite because a number of the methods in InteractionHelper need to trigger it in the calling class. We do this using the IUpdateVisualState internal interface.

Method Details

AllowGotFocus() public method

Check if the control's GotFocus event should be handled.

public AllowGotFocus ( RoutedEventArgs e ) : bool
e	System.Windows.RoutedEventArgs	Event arguments.
return	bool

AllowKeyDown() public method

Check if the control's KeyDown event should be handled.

public AllowKeyDown ( KeyEventArgs e ) : bool
e	KeyEventArgs	Event arguments.
return	bool

AllowKeyUp() public method

Check if the control's KeyUp event should be handled.

public AllowKeyUp ( KeyEventArgs e ) : bool
e	KeyEventArgs	Event arguments.
return	bool

AllowLostFocus() public method

Check if the control's LostFocus event should be handled.

public AllowLostFocus ( RoutedEventArgs e ) : bool
e	System.Windows.RoutedEventArgs	Event arguments.
return	bool

AllowMouseEnter() public method

Check if the control's MouseEnter event should be handled.

public AllowMouseEnter ( MouseEventArgs e ) : bool
e	MouseEventArgs	Event arguments.
return	bool

AllowMouseLeave() public method

Check if the control's MouseLeave event should be handled.

public AllowMouseLeave ( MouseEventArgs e ) : bool
e	MouseEventArgs	Event arguments.
return	bool

AllowMouseLeftButtonDown() public method

Check if the control's MouseLeftButtonDown event should be handled.

public AllowMouseLeftButtonDown ( MouseButtonEventArgs e ) : bool
e	MouseButtonEventArgs	Event arguments.
return	bool

AllowMouseLeftButtonUp() public method

Check if the control's MouseLeftButtonUp event should be handled.

public AllowMouseLeftButtonUp ( MouseButtonEventArgs e ) : bool
e	MouseButtonEventArgs	Event arguments.
return	bool

InteractionHelper() public method

Initializes a new instance of the InteractionHelper class.

public InteractionHelper ( Control control ) : System.Diagnostics
control	Control	Control receiving interaction.
return	System.Diagnostics

OnApplyTemplateBase() public method

Update the visual state of the control when its template is changed.

public OnApplyTemplateBase ( ) : void
return	void

OnGotFocusBase() public method

Base implementation of the virtual GotFocus event handler.

public OnGotFocusBase ( ) : void
return	void

OnLostFocusBase() public method

Base implementation of the virtual LostFocus event handler.

public OnLostFocusBase ( ) : void
return	void

OnMouseEnterBase() public method

Base implementation of the virtual MouseEnter event handler.

public OnMouseEnterBase ( ) : void
return	void

OnMouseLeaveBase() public method

Base implementation of the virtual MouseLeave event handler.

public OnMouseLeaveBase ( ) : void
return	void

OnMouseLeftButtonDownBase() public method

Base implementation of the virtual MouseLeftButtonDown event handler.

public OnMouseLeftButtonDownBase ( ) : void
return	void

OnMouseLeftButtonUpBase() public method

Base implementation of the virtual MouseLeftButtonUp event handler.

public OnMouseLeftButtonUpBase ( ) : void
return	void

UpdateVisualStateBase() public method

Update the visual state of the control.

public UpdateVisualStateBase ( bool useTransitions ) : void
useTransitions	bool	/// A value indicating whether to automatically generate transitions to /// the new state, or instantly transition to the new state. ///
return	void