Class GridAutoScroller

Represents a class which handles the automatic scrolling of content when the user drags the pressed mouse to an edge of the control.

Inheritance

System.Object

GridAutoScroller

Namespace: Syncfusion.UI.Xaml.CellGrid

Assembly: Syncfusion.SfCellGrid.WPF.dll

Syntax

public class GridAutoScroller : Object

Constructors

GridAutoScroller()

Initializes a new instance of the GridAutoScroller class.

Declaration

public GridAutoScroller()

Properties

AllowScrollingOnOutsideBounds

Gets or sets the value that indicates whether perform auto scrolling outside the bounds or inside the scroll margin.

Declaration

public bool AllowScrollingOnOutsideBounds { get; set; }

Property Value

Type	Description
System.Boolean	True or False.

AutoScrollBounds

Gets or sets the outer scrolling area. Typically the client area of the control.

Declaration

public Rect AutoScrollBounds { get; set; }

Property Value

Type	Description
System.Windows.Rect	Outer Scroll area.

HorizontalScrollBar

Gets the state describing the horizontal scrollbar.

Declaration

public IScrollBar HorizontalScrollBar { get; }

Property Value

Type	Description
IScrollBar	The horizontal scrollbar state.

InsideScrollBounds

Gets the inside scrolling area. The control will scroll if the user drags the mouse outside this area.

Declaration

public virtual Rect InsideScrollBounds { get; }

Property Value

Type	Description
System.Windows.Rect	Inside Scroll area.

InsideScrollMargin

Gets or Sets the default margin for the scrolling area when the user moves the mouse to the margin between InsideScrollBounds and AutoScrollBounds

Declaration

public Size InsideScrollMargin { get; set; }

Property Value

Type	Description
System.Windows.Size	Margin of Scroll area.

IntervalTime

Gets or sets the timer interval for auto scrolling.

Declaration

public TimeSpan IntervalTime { get; set; }

Property Value

Type	Description
System.TimeSpan	Time interval.

IsEnabled

Gets or sets the value whether to enable or disable the AutoScroller.

Declaration

public bool IsEnabled { get; set; }

Property Value

Type	Description
System.Boolean	True or False.

Orientation

Disables or specifies the direction for automatic scrolling when the user drags the mouse cursor out of the scrolling area.

Declaration

public AutoScrollOrientation Orientation { get; set; }

Property Value

Type
AutoScrollOrientation

VerticalScrollBar

Gets the state describing for the vertical scroll bar.

Declaration

public IScrollBar VerticalScrollBar { get; }

Property Value

Type	Description
IScrollBar	The vertical scroll bar state.

Methods

add_AutoScrollerValueChanged(GridAutoScroller.AutoScrollerValueChangedEventHandler)

Declaration

public void add_AutoScrollerValueChanged(GridAutoScroller.AutoScrollerValueChangedEventHandler value)

Parameters

Type	Name	Description
GridAutoScroller.AutoScrollerValueChangedEventHandler	value

AutoScroll(Point)

Calculates the auto scroll index and scrolls to a particular position in the grid.

Declaration

protected virtual void AutoScroll(Point mousePoint)

Parameters

Type	Name	Description
System.Windows.Point	mousePoint	Position of the mouse.

OnAutoScrollingChanged(EventArgs)

Raises the AutoScrollingChanged event.

Declaration

protected virtual void OnAutoScrollingChanged(EventArgs e)

Parameters

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

RaiseAutoScrollerValueChanged(Boolean, Boolean, Boolean, Boolean, RowColumnIndex)

Invokes the AutoScroller Value changed event.

Declaration

protected virtual void RaiseAutoScrollerValueChanged(bool isLineUp, bool isLineDown, bool isLineLeft, bool isLineRight, RowColumnIndex rowColumnIndex)

Parameters

Type	Name	Description
System.Boolean	isLineUp	true when scrolling direction is up.
System.Boolean	isLineDown	true when scrolling direction is down.
System.Boolean	isLineLeft	true when scrolling direction is left.
System.Boolean	isLineRight	true when scrolling direction is right.
RowColumnIndex	rowColumnIndex	scrolling row column index

remove_AutoScrollerValueChanged(GridAutoScroller.AutoScrollerValueChangedEventHandler)

Declaration

public void remove_AutoScrollerValueChanged(GridAutoScroller.AutoScrollerValueChangedEventHandler value)

Parameters

Type	Name	Description
GridAutoScroller.AutoScrollerValueChangedEventHandler	value

ResetInsideScrollMargins()

Resets the InsideScrollMargin property to its default value.

Declaration

public void ResetInsideScrollMargins()

Events

AutoScrollerValueChanged

Occurs when the auto scroller value changed .

Declaration

public event GridAutoScroller.AutoScrollerValueChangedEventHandler AutoScrollerValueChanged

Event Type

Type
GridAutoScroller.AutoScrollerValueChangedEventHandler

AutoScrollingChanged

Occurs when the AutoScrolling property is changed.

Declaration

public event EventHandler AutoScrollingChanged

Event Type

Type
System.EventHandler

Remarks

If you want to prevent autoscrolling, you should handle this event and reset the AutoScrolling property.