Version

PriorityScrolling Property (ScrollBarInfo)

Gets/sets whether callbacks made during a scroll operation occur synchronously or asynchronously.
Syntax
'Declaration
 
Public Property PriorityScrolling As Boolean
public bool PriorityScrolling {get; set;}

Property Value

When true, scroll notifications as a result of a scroll arrow or scroll track click will occur synchronously.
Example
The following sample code illustrates how to set various properties exposes by the UltraScrollBar control.

Imports Infragistics.Win
Imports Infragistics.Win.UltraWinScrollBar

Private Sub InitializeScrollBarInfo()

    ' Note: Under Windows XP if the 'SupportThemes' property
    ' is left set to True (its default setting) then some of
    ' the explicit appearance and button style property
    ' settings are ignored.
    Me.ultraScrollBar1.SupportThemes = False

    ' The UltraScrollBar control exposes a ScrollBarInfo
    ' object that exposes many of the same properties as
    ' the control (the common properties are mapped internally
    ' by the control so that you can set either the control's
    ' properties or the ScrollBarInfo's properties).
    Dim sbInfo As ScrollBarInfo

    sbInfo = Me.ultraScrollBar1.ScrollBarInfo

    '---------------------------------------------------
    ' Set various properties on the ScrollBarLook object
    '---------------------------------------------------

    ' ScrollBarInfo exposes a 'ScrollBarLook' object that
    ' exposes properties that effect the look of the 
    ' scroolbar
    With sbInfo.ScrollBarLook

        ' Set the default appearance to use a gradient.
        .Appearance.BackColor = Color.LightGray
        .Appearance.BackColor2 = Color.White
        .Appearance.BackGradientStyle = GradientStyle.HorizontalBump
        .Appearance.ForeColor = Color.Red

        ' Specify the appearance of the scroll buttons
        .ButtonAppearance.BackColor = Color.LightGray
        .ButtonAppearance.BackGradientStyle = GradientStyle.None
        .ButtonAppearance.ForeColor = Color.Red

        ' Specify the appearance of the scroll thumb track area
        .TrackAppearance.BackColor = Color.Gray

        ' Specify the appearance of the scroll thumb
        .ThumbAppearance.BackColor = Color.Silver
        .ThumbAppearance.BackGradientStyle = GradientStyle.None
        .ThumbAppearance.BackHatchStyle = BackHatchStyle.Divot

        ' Specify that 2 additional buttons will be
        ' shown, one to go to the minimum value (left/top)
        ' and one to go to the maximum value (right/bottom).
        .MinMaxButtonsVisible = True

        ' Specify where the buttons appear.
        ' Note: This enumeration has a 'None' option to
        ' hide the buttons.
        .ScrollBarArrowStyle = ScrollBarArrowStyle.BothAtLeftTop

  '-----------------------------------------------------------------------
	  ' ScrollBarLook also exposes seperate Horizontal and Vertical Appearance,
  ' ButtonAppearance, TrackAppearance, and ThumbAppearance
  '-----------------------------------------------------------------------

  ' Set seperate horizontal and vertical default appearances
  .AppearanceHorizontal.BackColor = Color.LightGreen
  .AppearanceHorizontal.BackColor2 = Color.White
  .AppearanceHorizontal.BackGradientStyle = GradientStyle.ForwardDiagonal
  .AppearanceHorizontal.ForeColor = Color.Blue

  .AppearanceVertical.BackColor = Color.LightBlue
  .AppearanceVertical.BackColor2 = Color.White
  .AppearanceVertical.BackGradientStyle = GradientStyle.ForwardDiagonal
  .AppearanceVertical.ForeColor = Color.Green

  ' Specify seperate horizontal and vertical scroll button appearances
  .ButtonAppearanceHorizontal.BackColor = Color.LightGreen
  .ButtonAppearanceHorizontal.BackGradientStyle = GradientStyle.None
  .ButtonAppearanceHorizontal.ForeColor = Color.DarkGreen

  .ButtonAppearanceVertical.BackColor = Color.LightBlue
  .ButtonAppearanceVertical.BackGradientStyle = GradientStyle.None
  .ButtonAppearanceVertical.ForeColor = Color.DarkBlue

  ' Specify seperate horizontal and vertical thumb track appearances
  .TrackAppearanceHorizontal.BackColor = Color.Green
  .TrackAppearanceVertical.BackColor = Color.Blue

  ' Specify seperate horizontal and vertical scroll thumb appearances
  .ThumbAppearanceHorizontal.BackColor = Color.Green
  .ThumbAppearanceVertical.BackColor = Color.Blue

    End With

    '---------------------------------------------------
    ' Set various properties on the ScrollBarInfo object
    '---------------------------------------------------

    ' Specify that the scrollbar will be automatically
    ' disabled when the Minimum, Maximum and LargeChange
    ' values don't permit thumb movement.
    sbInfo.AutoDisable = True

    ' Specify that the # of milliseconds between scroll events
    ' when the mouse is held down over on scroll button.
    sbInfo.AutoRepeatDelay = 100

    ' Set the button style for the control
    sbInfo.ButtonStyle = UIElementButtonStyle.Button3D

    ' Set the 'Minimum', 'Maximum', 'LargeChange' and 
    ' 'SmallChange' properties.
    sbInfo.Minimum = 45
    sbInfo.Maximum = 85
    sbInfo.SmallChange = 1
    sbInfo.LargeChange = 5

    ' Note: Instead of setting the individual 4 properties 
    ' above you can call the 'Initialize' method and pass
    ' the values in as parameters. 

    sbInfo.Initialize(45, 80, 1, 5)

    ' Notice, however that the 2nd paramter ('maximumDragValue')
    ' is not the same value we set the 'Maximum' property above.
    '
    ' The 'Initialize' method takes into account the value
    ' of the 'largeChange' parameter and adds that into the
    ' 'Maximum' property. In this example the highest 'Value'
    ' that can be attained is 80 even though 'Maximum' is
    ' set to 85.

    ' Initialize the value property
    sbInfo.Value = 45

    ' Set the orientation of the control to be vertical.
    sbInfo.Orientation = Orientation.Vertical

    ' If this property is set to false then scrolling
    ' notifications are triggered asynchronously.
    ' The default setting is false.
    sbInfo.PriorityScrolling = False

    ' If this proerty is set to true then the
    ' thumb will pulse to indicate that the 
    ' control has focus.
    sbInfo.ShowsFocus = Me.ultraScrollBar1.TabStop

End Sub
using Infragistics.Win;
using Infragistics.Win.UltraWinScrollBar;

private void InitializeScrollBarInfo()
{

	// Note: Under Windows XP if the 'SupportThemes' property
	// is left set to True (its default setting) then some of
	// the explicit appearance and button style property
	// settings are ignored.
	this.ultraScrollBar1.SupportThemes = false;

	// The UltraScrollBar control exposes a ScrollBarInfo
	// object that exposes many of the same properties as
	// the control (the common properties are mapped internally
	// by the control so that you can set either the control's
	// properties or the ScrollBarInfo's properties).
	ScrollBarInfo sbInfo = this.ultraScrollBar1.ScrollBarInfo;

	// ScrollBarInfo exposes a 'ScrollBarLook' object that
	// exposes properties that effect the look of the 
	// scroolbar
	ScrollBarLook sbLook = sbInfo.ScrollBarLook;

	//---------------------------------------------------
	// Set various properties on the ScrollBarLook object
	//---------------------------------------------------

	// Set the default appearance to use a gradient.
	sbLook.Appearance.BackColor = Color.LightGray;
	sbLook.Appearance.BackColor2 = Color.White;
	sbLook.Appearance.BackGradientStyle = GradientStyle.HorizontalBump;
	sbLook.Appearance.ForeColor = Color.Red;

	// Specify the appearance of the scroll buttons
	sbLook.ButtonAppearance.BackColor = Color.LightGray;
	sbLook.ButtonAppearance.BackGradientStyle = GradientStyle.None;
	sbLook.ButtonAppearance.ForeColor = Color.Red;
	
	// Specify the appearance of the scroll thumb track area
	sbLook.TrackAppearance.BackColor = Color.Gray;
	
	// Specify the appearance of the scroll thumb
	sbLook.ThumbAppearance.BackColor = Color.Silver;
	sbLook.ThumbAppearance.BackGradientStyle = GradientStyle.None;
	sbLook.ThumbAppearance.BackHatchStyle = BackHatchStyle.Divot;

	// Specify that 2 additional buttons will be
	// shown, one to go to the minimum value (left/top)
	// and one to go to the maximum value (right/bottom).
	sbLook.MinMaxButtonsVisible = true;

	// Specify where the buttons appear.
	// Note: This enumeration has a 'None' option to
	// hide the buttons.
	sbLook.ScrollBarArrowStyle = ScrollBarArrowStyle.BothAtLeftTop;

	//-----------------------------------------------------------------------
      // ScrollBarLook also exposes seperate Horizontal and Vertical Appearance,
      // ButtonAppearance, TrackAppearance, and ThumbAppearance
	//-----------------------------------------------------------------------

      // Set seperate horizontal and vertical default appearances
      sbLook.AppearanceHorizontal.BackColor = Color.LightGreen;
      sbLook.AppearanceHorizontal.BackColor2 = Color.White;
      sbLook.AppearanceHorizontal.BackGradientStyle = GradientStyle.ForwardDiagonal;
      sbLook.AppearanceHorizontal.ForeColor = Color.Blue;

      sbLook.AppearanceVertical.BackColor = Color.LightBlue;
      sbLook.AppearanceVertical.BackColor2 = Color.White;
      sbLook.AppearanceVertical.BackGradientStyle = GradientStyle.ForwardDiagonal;
      sbLook.AppearanceVertical.ForeColor = Color.Green;

      // Specify seperate horizontal and vertical scroll button appearances
      sbLook.ButtonAppearanceHorizontal.BackColor = Color.LightGreen;
      sbLook.ButtonAppearanceHorizontal.BackGradientStyle = GradientStyle.None;
      sbLook.ButtonAppearanceHorizontal.ForeColor = Color.DarkGreen;

      sbLook.ButtonAppearanceVertical.BackColor = Color.LightBlue;
      sbLook.ButtonAppearanceVertical.BackGradientStyle = GradientStyle.None;
      sbLook.ButtonAppearanceVertical.ForeColor =  Color.DarkBlue;

      // Specify seperate horizontal and vertical thumb track appearances
      sbLook.TrackAppearanceHorizontal.BackColor = Color.Green;
      sbLook.TrackAppearanceVertical.BackColor = Color.Blue;

      // Specify seperate horizontal and vertical scroll thumb appearances
      sbLook.ThumbAppearanceHorizontal.BackColor = Color.Green;       
      sbLook.ThumbAppearanceVertical.BackColor = Color.Blue;        

	//---------------------------------------------------
	// Set various properties on the ScrollBarInfo object
	//---------------------------------------------------

	// Specify that the scrollbar will be automatically
	// disabled when the Minimum, Maximum and LargeChange
	// values don't permit thumb movement.
	sbInfo.AutoDisable = true;

	// Specify that the # of milliseconds between scroll events
	// when the mouse is held down over on scroll button.
	sbInfo.AutoRepeatDelay = 100;
	
	// Set the button style for the control
	sbInfo.ButtonStyle = UIElementButtonStyle.Button3D;

	// Set the 'Minimum', 'Maximum', 'LargeChange' and 
	// 'SmallChange' properties.
	sbInfo.Minimum = 45;
	sbInfo.Maximum = 85;
	sbInfo.SmallChange = 1;
	sbInfo.LargeChange = 5;
	
	// Note: Instead of setting the individual 4 properties 
	// above you can call the 'Initialize' method and pass
	// the values in as parameters. 

	sbInfo.Initialize(45, 80, 1, 5);

	// Notice, however that the 2nd paramter ('maximumDragValue')
	// is not the same value we set the 'Maximum' property above.
	//
	// The 'Initialize' method takes into account the value
	// of the 'largeChange' parameter and adds that into the
	// 'Maximum' property. In this example the highest 'Value'
	// that can be attained is 80 even though 'Maximum' is
	// set to 85.

	// Initialize the value property
	sbInfo.Value = 45;

	// Set the orientation of the control to be vertical.
	sbInfo.Orientation = Orientation.Vertical;

	// If this property is set to false then scrolling
	// notifications are triggered asynchronously.
	// The default setting is false.
	sbInfo.PriorityScrolling = false;

	// If this proerty is set to true then the
	// thumb will pulse to indicate that the 
	// control has focus.
	sbInfo.ShowsFocus = this.ultraScrollBar1.TabStop;

}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also