The appearance of the scrollbar can be applied using GridOfficeScrollbars property. The columns and rows of the GridControl can be scrolled horizontally and vertically using built-in scrollbars. The same behavior of the hidden scroll logic can be achieved by enabling the pixel scrolling. Vertical scrollbar thumb size changed according to the overall row count without using the hidden scroll logic is shows as follows, The following screenshot shows the grid with applied hidden scroll logic, Therefore the scrollbar thumb will draw based only on the visible rows. By enabling the UseOldHiddenScrollLogic static property, the hidden columns is not taken to the account for scrolling. In this case the thumb size of the vertical scrollbar is set based on the overall row count of the grid. UseOldHiddenScrollLogic = True InitializeComponent ()Ĭonsider the case “The grid have 1000 number of rows and the rows in between 5 and 990 are gets hidden”. 'Enable Hidden scroll logic GridControlBase. DefaultSize End Sub End ClassĢ.Assign the New custom control to the GridControl. DefaultSize + 1 pixelDelta = ( pixelPos - Model. RowHeights ( 0 ) Then rowIndex = 0 pixelDelta = pixelPos End If rowIndex = ( pixelPos - Model.
Public Overrides Sub VScrollPixelPosToRowIndex ( ByVal pixelPos As Integer, ByRef rowIndex As Integer, ByRef pixelDelta As Integer ) If pixelPos < pixelPos - Model. RowHeights ( 0 ) End Function 'Gets the row and pixel Delta to the scroll position of the row for the specified scroll position. RowCount = 0 Then Return 0 End If 'Returns the vertical pixel Position. Public Overrides Function GetVScrollPixelHeight () As Integer 'Checks the number of rows in the Grid. RowHeights ( 0 ) End If End Function 'Gets the value for the vertical pixel Position. RowCount ) If rowIndex > 0 Then Return ( rowIndex - 1 ) * Model. Public Overrides Function RowIndexToVScrollPixelPos ( ByVal rowIndex As Integer ) As Integer 'Takes separate height for column headers into account. Public Class DerivedGridControl Inherits GridControl 'Gets the Scroll Position for the pixel scrolling of a row.
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Public class DerivedGridControl : GridControl / Professional Windows GUI Programming Using C by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, Zach Greenvoss, Shripad Kulkarni, Neil Whitlow Publisher: Peer Information ISBN: 1861007663 / using System using System.Drawing using System.Collections using System.ComponentModel using.
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