Class GridDragColumnHeaderMouseControllerBase

This is an abstract base class used by GridDragColumnHeaderMouseController. It implements the IMouseController interface to be used with MouseControllerDispatcher and provides common functions for hit-testing and drag and drop functionality used by the derived class.

Inheritance

System.Object

GridDragColumnHeaderMouseControllerBase

GridDragColumnHeaderMouseController

Implements

IMouseController

IGridFocusHelper

Inherited Members

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)

System.Object.ToString()

Namespace: Syncfusion.Windows.Forms.Grid

Assembly: Syncfusion.Grid.Windows.dll

Syntax

public abstract class GridDragColumnHeaderMouseControllerBase : IMouseController, IGridFocusHelper

Constructors

GridDragColumnHeaderMouseControllerBase()

Initializes a new instance of the GridDragColumnHeaderMouseControllerBase class.

Declaration

public GridDragColumnHeaderMouseControllerBase()

GridDragColumnHeaderMouseControllerBase(GridControlBaseImp)

Initializes a new instance of the GridDragColumnHeaderMouseControllerBase class with the grid it is bound to..

Declaration

public GridDragColumnHeaderMouseControllerBase(GridControlBaseImp grid)

Parameters

Type	Name	Description
GridControlBaseImp	grid

Properties

ClickCellsController

Gets the GridClickCellsMouseController which is used to forward mouse events to cell renderers.

Declaration

public GridClickCellsMouseController ClickCellsController { get; }

Property Value

Type
GridClickCellsMouseController

Cursor

The cursor to be displayed.

Declaration

public virtual Cursor Cursor { get; }

Property Value

Type
System.Windows.Forms.Cursor

DragHeaderVisible

Used internally. Gets or sets the dragHeaderVisible.

Declaration

public bool DragHeaderVisible { get; set; }

Property Value

Type
System.Boolean

Name

The name of mouse controller.

Declaration

public virtual string Name { get; }

Property Value

Type
System.String

Methods

CancelMode()

CancelMode is called for the active controller after a MouseDown message when the mouse operation is cancelled.

Declaration

public virtual void CancelMode()

GetAllowFixFocus()

Implement this method in your IMouseController and return False if it would interfere with your controller's state when the current cell is focused and possibly scrolled into view.

Declaration

public virtual bool GetAllowFixFocus()

Returns

Type	Description
System.Boolean	A System.Boolean that indicates if the grid is allowed to set the focus onto the current cells System.Windows.Forms.Control.

GetColumnAtMousePosition()

The column descriptor under the mouse position. Will be null if there is no header drawn below mouse.

Declaration

public int GetColumnAtMousePosition()

Returns

Type	Description
System.Int32	returns mouse position

GetGridControl()

Returns the grid it is bound to.

Declaration

protected virtual GridControlBaseImp GetGridControl()

Returns

Type	Description
GridControlBaseImp	The GridControlBase

GetRedArrowIndicatorLocation(Int32)

Gets the red arrow indicator location.

Declaration

public Point GetRedArrowIndicatorLocation(int colIndex)

Parameters

Type	Name	Description
System.Int32	colIndex	Index of the col.

Returns

Type	Description
System.Drawing.Point	returns point

HitTest(MouseEventArgs, IMouseController)

HitTest is called to determine whether your controller wants to handle the mouse events based current context.

Declaration

public virtual int HitTest(MouseEventArgs e, IMouseController controller)

Parameters

Type	Name	Description
System.Windows.Forms.MouseEventArgs	e	The System.Windows.Forms.MouseEventArgs instance containing the event data.
IMouseController	controller	The controller.

Returns

Type	Description
System.Int32	returns int value to determine whether your controller wants to handle the mouse events based current context

MouseDown(MouseEventArgs)

MouseDown is called when this controller signaled in HitTest that it wants to handle mouse events and the user pressed the mouse button.

Declaration

public virtual void MouseDown(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Forms.MouseEventArgs	e	A System.Windows.Forms.MouseEventArgs holding event data.

Remarks

MouseDown is called and this controller will become the active controller and receive all subsequent mouse message until the mouse button is released or the mouse operation is cancelled.

MouseHover(MouseEventArgs)

MouseHover is called when this controller signaled in HitTest that it wants to handle mouse events.

Declaration

public virtual void MouseHover(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Forms.MouseEventArgs	e	A System.Windows.Forms.MouseEventArgs holding the event data.

MouseHoverEnter()

MouseHoverEnter is called when this controller signaled in HitTest that it wants to handle mouse events.

Declaration

public virtual void MouseHoverEnter()

MouseHoverLeave(EventArgs)

MouseHoverLeave is called when hovering ends either because user dragged mouse out of the hit-test area or when context changes (e.g. user pressed the mouse button).

Declaration

public virtual void MouseHoverLeave(EventArgs e)

Parameters

Type	Name	Description
System.EventArgs	e	The event args.

MouseMove(MouseEventArgs)

MouseMove is called for the active controller after a MouseDown message when the user moves the mouse pointer.

Declaration

public virtual void MouseMove(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Forms.MouseEventArgs	e	A System.Windows.Forms.MouseEventArgs holding event data.

MouseUp(MouseEventArgs)

MouseUp is called for the active controller after a MouseDown message when the user releases the mouse button.

Declaration

public virtual void MouseUp(MouseEventArgs e)

Parameters

Type	Name	Description
System.Windows.Forms.MouseEventArgs	e	A System.Windows.Forms.MouseEventArgs holding event data.

ResetClickCellsController()

Clears out pending state of ClickCellsController, possibly sending MouseHoverLeave or CancelMode notification to cell renderer.

Declaration

public void ResetClickCellsController()

ShouldShowDragBitmap()

Should the show drag bitmap.

Declaration

public bool ShouldShowDragBitmap()

Returns

Type	Description
System.Boolean	returns Boolean value

ShouldShowRedArrowIndicator()

Determines based on mouse position if red arrow indicator should be shown

Declaration

public bool ShouldShowRedArrowIndicator()

Returns

Type	Description
System.Boolean	returns Boolean value

ShouldShowRemoveCursor()

Determines based on mouse position if remove cursor should be shown

Declaration

public bool ShouldShowRemoveCursor()

Returns

Type	Description
System.Boolean	returns Boolean value

UpdateRedArrowIndicator()

Used internally. Update the property values for RedArrowIndicator.

Declaration

public void UpdateRedArrowIndicator()

Implements

IMouseController

IGridFocusHelper