Class MouseControllerDispatcher

MouseControllerDispatcher has no dependency on ScrollControl. You can use it with any FrameworkElement-derived class. You only need to forward mouse events to methods from IMouseEventsTarget interface or add MouseControllerDispatcher to MouseEventTargetCollection.

VirtualizingCellsControl uses a derived CellMouseControllerDispatcher class which adds support for changing context of a mouse operation when pressing mouse inside a textbox or other UIElement and then switching to a cell selection mode when moving mouse outside textbox.

Inheritance

System.Object

NonFinalizeDisposable

MouseControllerDispatcher

CellMouseControllerDispatcher

Implements

System.IDisposable

System.Collections.IEnumerable

IMouseEventsTarget

Inherited Members

NonFinalizeDisposable.Dispose()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

Namespace: Syncfusion.Windows.Controls.Scroll

Assembly: Syncfusion.GridCommon.WPF.dll

Syntax

public class MouseControllerDispatcher : NonFinalizeDisposable, IDisposable, IEnumerable, IMouseEventsTarget

Constructors

MouseControllerDispatcher(FrameworkElement)

Initializes a new MouseControllerDispatcher object and associates it with the parent control.

Declaration

public MouseControllerDispatcher(FrameworkElement owner)

Parameters

Type	Name	Description
System.Windows.FrameworkElement	owner

Fields

CanHandleMouseDown

Declaration

public bool CanHandleMouseDown

Field Value

Type
System.Boolean

Properties

ActiveController

Returns a reference to the active mouse controller that is receiving MouseDown, MouseMove and MouseUp messages when the user has pressed a mouse button.

Declaration

public IMouseController ActiveController { get; set; }

Property Value

Type
IMouseController

CancelCaptureInfo

Gets the cancel capture info.

Declaration

public ICaptureContext CancelCaptureInfo { get; }

Property Value

Type	Description
ICaptureContext	The cancel capture info.

Cursor

Returns the cursor to be displayed.

Declaration

public Cursor Cursor { get; }

Property Value

Type
System.Windows.Input.Cursor

IgnoreMouse

Gets a value indicating whether mouse events should be ignored.

Declaration

public bool IgnoreMouse { get; }

Property Value

Type	Description
System.Boolean	true if mouse events should be ignored; otherwise, false.

InCancelMode

Gets a value indicating whether instance is in CancelMode.

Declaration

public bool InCancelMode { get; }

Property Value

Type	Description
System.Boolean	true if in CancelMode; otherwise, false.

InMouseDown

Gets a value indicating whether instance is in MouseDown.

Declaration

public bool InMouseDown { get; }

Property Value

Type	Description
System.Boolean	true if in MouseDown; otherwise, false.

InMouseMove

Gets a value indicating whether instance is in MouseMove.

Declaration

public bool InMouseMove { get; }

Property Value

Type	Description
System.Boolean	true if in MouseMove; otherwise, false.

InMouseUp

Gets a value indicating whether instance is in MouseUp.

Declaration

public bool InMouseUp { get; }

Property Value

Type	Description
System.Boolean	true if in MouseUp; otherwise, false.

IsCaptureCanceled

Gets a value indicating whether this instance is mouse captured by child element.

Declaration

public bool IsCaptureCanceled { get; }

Property Value

Type	Description
System.Boolean	true if this instance is mouse captured by child element; otherwise, false.

IsMouseCapturedByChildElement

Gets a value indicating whether this instance is mouse captured by child element.

Declaration

public virtual bool IsMouseCapturedByChildElement { get; }

Property Value

Type	Description
System.Boolean	true if this instance is mouse captured by child element; otherwise, false.

IsMouseHovering

Gets a value indicating whether this instance is mouse hovering.

Declaration

public virtual bool IsMouseHovering { get; }

Property Value

Type	Description
System.Boolean	true if this instance is mouse hovering; otherwise, false.

IsMouseTracking

Gets a value indicating whether the mouse tracking feature is enabled.

Declaration

public bool IsMouseTracking { get; }

Property Value

Type	Description
System.Boolean	true if mouse tracking feature is enabled; otherwise, false.

LastHitTestCode

Returns the last HitTest value returned that was non-zero. Check this property if you need to make decision on your mouse controller's HitTest.

Declaration

public int LastHitTestCode { get; }

Property Value

Type
System.Int32

MouseDownLocation

Gets the mouse down location.

Declaration

public Point MouseDownLocation { get; }

Property Value

Type	Description
System.Windows.Point	The mouse down location.

MouseDownTick

Gets the mouse down tick (Environment.TickCount at mouse down).

Declaration

public int MouseDownTick { get; }

Property Value

Type	Description
System.Int32	The mouse down tick.

MouseHoverController

Returns the controller that currently receives mouse hovering messages.

Declaration

protected IMouseController MouseHoverController { get; }

Property Value

Type
IMouseController

OverrideMouseCursor

Declaration

public bool OverrideMouseCursor { get; set; }

Property Value

Type
System.Boolean

Owner

Returns a reference to the associated control.

Declaration

public FrameworkElement Owner { get; }

Property Value

Type
System.Windows.FrameworkElement

TrackMouse

Enables support for mouse tracking.

Declaration

public Rect TrackMouse { get; set; }

Property Value

Type
System.Windows.Rect

Remarks

Specify the bounds where the mouse tracking should start. As soon as the user moves the mouse over the specified region, MouseControllerDispatcher will simulate a mouse down event. When the user presses any mouse button MouseControllerDispatcher will simulate a mouse up and resets the mouse tracking mode. After the inital click on a mouse button, mouse processing will work as usual.

note

Mouse tracking lets you easily simulate the behavior of windows combo boxes.

Methods

Add(IMouseController)

Registers a mouse controller.

Declaration

public void Add(IMouseController controller)

Parameters

Type	Name	Description
IMouseController	controller

CancelMode()

Cancel any mouse processing.

Declaration

public void CancelMode()

Clear()

Declaration

public void Clear()

Contains(IMouseController)

Indicates whether a mouse controller has previously been registered.

Declaration

public bool Contains(IMouseController controller)

Parameters

Type	Name	Description
IMouseController	controller

Returns

Type
System.Boolean

CreateCaptureInfo(Point)

Creates the capture info when the mouse is pressed inside a child UIElement.

Declaration

protected virtual ICaptureContext CreateCaptureInfo(Point point)

Parameters

Type	Name	Description
System.Windows.Point	point	The point.

Returns

Type
ICaptureContext

CreateSuspendState()

Creates the suspend state when CancelMode() was called.

Declaration

protected virtual MouseControllerDispatcher.SuspendState CreateSuspendState()

Returns

Type
MouseControllerDispatcher.SuspendState

Dispose(Boolean)

Resets the dispatcher and calls Dispose for any registered mouse controller and unregisters all mouse controllers.

Declaration

protected override void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

Overrides

NonFinalizeDisposable.Dispose(Boolean)

Find(String)

Searchs a mouse controller by comparing with the name returned from IMouseController.Name.

Declaration

public IMouseController Find(string name)

Parameters

Type	Name	Description
System.String	name

Returns

Type
IMouseController

HitTest(MouseControllerEventArgs, out IMouseController)

HitTest loops through all controllers and call HitTest on each of them. Only one mouse controller can get voted to receive mouse messages.

Declaration

public int HitTest(MouseControllerEventArgs mouseEventArgs, out IMouseController controller)

Parameters

Type	Name	Description
MouseControllerEventArgs	mouseEventArgs	The MouseControllerEventArgs instance containing the event data.
IMouseController	controller	The controller.

Returns

Type	Description
System.Int32	The result identifying the hit-test context.

HitTest(Point)

HitTest loops through all controllers and call HitTest on each of them. Only one mouse controller can get voted to receive mouse messages.

Declaration

public int HitTest(Point point)

Parameters

Type	Name	Description
System.Windows.Point	point	The point in client coordinates to be hit tested.

Returns

Type	Description
System.Int32	The result identifying the hit-test context.

Remarks

The current result of the vote gets passed to the next mouse controller. If a controller wants to handle mouse events, it can decide based on the existing vote if it has higher priority for it to handle mouse messages than the existing vote.

HitTest(Point, Nullable<MouseButton>, Int32, out IMouseController)

HitTest loops through all controllers and call HitTest on each of them. Only one mouse controller can get voted to receive mouse messages.

Declaration

public int HitTest(Point point, MouseButton? mouseButton, int clicks, out IMouseController controller)

Parameters

Type	Name	Description
System.Windows.Point	point	The point in client coordinates to be hit tested.
System.Nullable<System.Windows.Input.MouseButton>	mouseButton	The mouse button that is pressed.
System.Int32	clicks	1 for single-click; 2 for double click.
IMouseController	controller	A placeholder where a reference to the winning IMouseController is returned.

Returns

Type	Description
System.Int32	The result identifying the hit-test context.

HitTest(Point, MouseButton)

HitTest loops through all controllers and call HitTest on each of them. Only one mouse controller can get voted to receive mouse messages.

Declaration

public int HitTest(Point point, MouseButton mouseButton)

Parameters

Type	Name	Description
System.Windows.Point	point	The point in client coordinates to be hit tested.
System.Windows.Input.MouseButton	mouseButton	The mouse button that is pressed.

Returns

Type	Description
System.Int32	The result identifying the hit-test context.

HitTest(Point, MouseButton, out IMouseController)

HitTest loops through all controllers and call HitTest on each of them. Only one mouse controller can get voted to receive mouse messages.

Declaration

public int HitTest(Point point, MouseButton mouseButton, out IMouseController controller)

Parameters

Type	Name	Description
System.Windows.Point	point	The point in client coordinates to be hit tested.
System.Windows.Input.MouseButton	mouseButton	The mouse button that is pressed.
IMouseController	controller	A placeholder where a reference to the winning IMouseController is returned.

Returns

Type	Description
System.Int32	The result identifying the hit-test context.

OnActiveControllerChanged(EventArgs)

Raises the ActiveControllerChanged event.

Declaration

protected virtual void OnActiveControllerChanged(EventArgs e)

Parameters

Type	Name	Description
System.EventArgs	e	A System.EventArgs that contains the event data.

OnDrop(DragEventArgs)

Declaration

public void OnDrop(DragEventArgs e)

Parameters

Type	Name	Description
System.Windows.DragEventArgs	e

OnMouseDown(MouseButtonEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.MouseDownEvent�attached event is raised on the host element.

Declaration

public void OnMouseDown(MouseButtonEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseButtonEventArgs	e	The System.Windows.Input.MouseButtonEventArgs instance containing the event data.

OnMouseEnter(MouseEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.MouseEnterEvent�attached event is raised on the host element.

Declaration

public void OnMouseEnter(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseEventArgs	e	The System.Windows.Input.MouseEventArgs instance containing the event data.

OnMouseLeave(MouseEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.MouseLeaveEvent�attached event is raised on the host element.

Declaration

public void OnMouseLeave(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseEventArgs	e	The System.Windows.Input.MouseEventArgs instance containing the event data.

OnMouseMove(MouseEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.MouseMoveEvent�attached event is raised on the host element.

Declaration

public void OnMouseMove(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseEventArgs	e	The System.Windows.Input.MouseEventArgs instance containing the event data.

OnMouseUp(MouseButtonEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.MouseUpEvent�attached event is raised on the host element.

Declaration

public void OnMouseUp(MouseButtonEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseButtonEventArgs	e	The System.Windows.Input.MouseButtonEventArgs instance containing the event data.

OnMouseWheel(MouseWheelEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.MouseWheelEvent�attached event is raised on the host element.

Declaration

public void OnMouseWheel(MouseWheelEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseWheelEventArgs	e	The System.Windows.Input.MouseWheelEventArgs instance containing the event data.

OnPreviewMouseDown(MouseButtonEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.PreviewMouseDownEvent�attached event is raised on the host element.

Declaration

public void OnPreviewMouseDown(MouseButtonEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseButtonEventArgs	e	The System.Windows.Input.MouseButtonEventArgs instance containing the event data.

OnPreviewMouseMove(MouseEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.PreviewMouseMoveEvent�attached event is raised on the host element.

Declaration

public void OnPreviewMouseMove(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseEventArgs	e	The System.Windows.Input.MouseEventArgs instance containing the event data.

OnPreviewMouseUp(MouseButtonEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.PreviewMouseUpEvent�attached event is raised on the host element.

Declaration

public void OnPreviewMouseUp(MouseButtonEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseButtonEventArgs	e	The System.Windows.Input.MouseButtonEventArgs instance containing the event data.

OnPreviewMouseWheel(MouseWheelEventArgs)

Invoked when an unhandled System.Windows.Input.Mouse.PreviewMouseWheelEvent�attached event is raised on the host element.

Declaration

public void OnPreviewMouseWheel(MouseWheelEventArgs e)

Parameters

Type	Name	Description
System.Windows.Input.MouseWheelEventArgs	e	The System.Windows.Input.MouseWheelEventArgs instance containing the event data.

OnTrackMouseChanged(EventArgs)

Raises the TrackMouseChanged event.

Declaration

protected virtual void OnTrackMouseChanged(EventArgs e)

Parameters

Type	Name	Description
System.EventArgs	e	A System.EventArgs that contains the event data.

QueryWantsMouseInput(MouseDevice)

Queries the WantsMouseInputProperty attached property of the element the mouse is directly over.

Declaration

protected virtual bool QueryWantsMouseInput(MouseDevice mouseDevice)

Parameters

Type	Name	Description
System.Windows.Input.MouseDevice	mouseDevice	The mouse device.

Returns

Type
System.Boolean

Remove(IMouseController)

Removes a mouse controller.

Declaration

public void Remove(IMouseController controller)

Parameters

Type	Name	Description
IMouseController	controller

ResetTrackMouse()

Resets support for mouse tracking.

Declaration

public void ResetTrackMouse()

Remarks

Call this method after a user interaction that should switch the control back into normal mouse behavior. For example, when the control gets the focus or when the user clicks a scrollbar.

RestoreMode()

Restores the previously saved mode from suspend state created with CreateSuspendState().

Declaration

public void RestoreMode()

ResumeMouse()

Resumes handline mouse events.

Declaration

public void ResumeMouse()

SetHost(FrameworkElement)

Sets the host.

Declaration

public void SetHost(FrameworkElement host)

Parameters

Type	Name	Description
System.Windows.FrameworkElement	host	The host.

SetMouseHoverController(IMouseController, MouseEventArgs)

Sets the controller that will receive mouse hovering messages. If the controller is changed, MouseHoverLeave and MouseHoverEnter calls are made.

Declaration

protected void SetMouseHoverController(IMouseController value, MouseEventArgs e)

Parameters

Type	Name	Description
IMouseController	value
System.Windows.Input.MouseEventArgs	e

StartTrackMouse()

Call this from controllers MouseUp method when you want to enable mouse tracking when user release mouse button (e.g. let user click on a line and then resize the line without mouse being pressed down).

Declaration

public void StartTrackMouse()

SuspendMouse()

Suspends handling mouse events.

Declaration

public void SuspendMouse()

ToString()

Declaration

public override string ToString()

Returns

Type
System.String

Overrides

System.Object.ToString()

Events

ActiveControllerChanged

Indicates that the active controller has changed.

Declaration

public event EventHandler ActiveControllerChanged

Event Type

Type
System.EventHandler

Remarks

Active controller is the controller that is receiving MouseDown, MouseMove and MouseUp messages when the user has pressed a mouse button.

TrackMouseChanged

Indicates that the value of the TrackMouse property has changed.

Declaration

public event EventHandler TrackMouseChanged

Event Type

Type
System.EventHandler

Explicit Interface Implementations

IEnumerable.GetEnumerator()

Declaration

IEnumerator IEnumerable.GetEnumerator()

Returns

Type
System.Collections.IEnumerator

Implements

System.IDisposable

System.Collections.IEnumerable

IMouseEventsTarget

Extension Methods

FunctionalExtensions.ForEach<T>(IEnumerable, Action<T>)

FunctionalExtensions.ToList<T>(IEnumerable)