Documentation

Interface IRadScrollViewport

This interface defines all necessary methods for custom scrolling. Performing each scroll operation via the method DoScroll(Point, Point) (thus allowing custom logic to be used) is called logical scrolling. The only way to enable logical scrolling in RadScrollViewer is via implementation of this interface.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.UI.dll

Syntax

public interface IRadScrollViewport

Methods

DoScroll(Point, Point)

Declaration
void DoScroll(Point oldValue, Point newValue)
Parameters
System.Drawing.Point oldValue

System.Drawing.Point newValue

GetExtentSize()

Gets the real size of the content that the viewport must visualize.

Declaration
Size GetExtentSize()
Returns
System.Drawing.Size

GetScrollParams(Size, Size)

Retrieves the scroll parameters.

Declaration
ScrollPanelParameters GetScrollParams(Size viewportSize, Size extentSize)
Parameters
System.Drawing.Size viewportSize

System.Drawing.Size extentSize

Returns
ScrollPanelParameters

InvalidateViewport()

Invalidates the viewport.

Declaration
void InvalidateViewport()

ResetValue(Point, Size, Size)

Calculate scroll value. This method is used while resizing the scroll panel.

Declaration
Point ResetValue(Point currentValue, Size viewportSize, Size extentSize)
Parameters
System.Drawing.Point currentValue

System.Drawing.Size viewportSize

System.Drawing.Size extentSize

Returns
System.Drawing.Point

ScrollOffsetForChildVisible(RadElement, Point)

Calculates the necessary offset in order to make the given child visible.

Declaration
Size ScrollOffsetForChildVisible(RadElement childElement, Point currentScrollValue)
Parameters
RadElement childElement

System.Drawing.Point currentScrollValue

Returns
System.Drawing.Size

Extension Methods