Infragistics2.Win.UltraWinTree.v8.1
ExpansionIndicatorPadding Property
See Also  Example
Infragistics.Win.UltraWinTree Namespace > UltraTree Class : ExpansionIndicatorPadding Property

Gets / sets the the amount of padding to use on the left and right sides of the expansion indicator.

Syntax

Visual Basic (Declaration) 
Public Property ExpansionIndicatorPadding As Integer
C# 
public int ExpansionIndicatorPadding {get; set;}

Remarks

Determines the amount of padding on the left and right of the expansion indicator. The value specified is applied to each side. For example, a value of 3 indicates 3 pixels of padding on the left and 3 pixels of padding on the right.

UltraTree.ExpansionIndicatorSize, ExpansionIndicatorPadding, and Indent are closely related and the behavior of these three properties depends on the UltraTree.DisplayStyle.

When DisplayStlye is Standard, the actual indentation of the nodes in the tree will be the Indent property, unless the Indent is too small. If the Indent property value is too small to fit the ExpansionIndicatorSize and it's padding, then it will be enlarged to fit.

When DisplayStlye is WindowsVista, the Indent property is ignored, and the indentation is automatically calculated to fit the ExpansionIndicatorSize and ExpansionIndicatorPadding.

Example

Visual BasicCopy Code
Imports Infragistics.Win.UltraWinTree


        ' Define the width and height of the expansion indicators. All of the images need to
        ' be the same size.
        Const expansionIndicatorImageWidth As Integer = 15
        Const expansionIndicatorImageHeight As Integer = 15

        ' Set the ExpansionIndicatorSize on the tree.
        Me.ultraTree1.ExpansionIndicatorSize = New Size(expansionIndicatorImageWidth, expansionIndicatorImageHeight)

        ' Set the ExpansionIndicatorPadding.
        Me.ultraTree1.ExpansionIndicatorPadding = 3

        ' Tell the tree to hide the expansion indicators whenever the mouse is not over it.
        Me.ultraTree1.HideExpansionIndicators = HideExpansionIndicators.OnMouseLeave

        ' Create a rect one pixel smaller than the size of the indicators. We will use this to
        ' draw the ellipses in the indicator images so they don't get clipped.
        Dim expansionIndicatorImageRect As Rectangle = New Rectangle(0, 0, expansionIndicatorImageWidth - 1, expansionIndicatorImageHeight - 1)

        ' Create a new bitmap for each state of the expansion indicators.
        Dim expansionIndicatorImageCollapsed As Bitmap = New Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight)
        Dim expansionIndicatorImageExpanded As Bitmap = New Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight)
        Dim expansionIndicatorImageCollapsedHotTracked As Bitmap = New Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight)
        Dim expansionIndicatorImageExpandedHotTracked As Bitmap = New Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight)

        ' Draw the collapsed expansion indicator image.
        ' A red circle.
        Dim g As Graphics = Nothing
        Try
            g = Graphics.FromImage(expansionIndicatorImageCollapsed)
            g.Clear(Color.Transparent)
            g.FillEllipse(Brushes.Red, expansionIndicatorImageRect)
        Finally
            If Not g Is Nothing Then
                g.Dispose()
            End If
        End Try

        ' Draw the expanded expansion indicator image.
        ' A green circle.
        Try
            g = Graphics.FromImage(expansionIndicatorImageExpanded)
            g.Clear(Color.Transparent)
            g.FillEllipse(Brushes.Green, expansionIndicatorImageRect)
        Finally
            If Not g Is Nothing Then
                g.Dispose()
            End If
        End Try

        ' Draw the collapsed expansion indicator image.
        ' A red circle with a black border around it.
        Try
            g = Graphics.FromImage(expansionIndicatorImageCollapsedHotTracked)
            g.Clear(Color.Transparent)
            g.FillEllipse(Brushes.Red, expansionIndicatorImageRect)
            g.DrawEllipse(Pens.Black, expansionIndicatorImageRect)
        Finally
            If Not g Is Nothing Then
                g.Dispose()
            End If
        End Try

        ' Draw the collapsed expansion indicator image.
        ' A green circle with a black border around it.
        Try
            g = Graphics.FromImage(expansionIndicatorImageExpandedHotTracked)
            g.Clear(Color.Transparent)
            g.FillEllipse(Brushes.Green, expansionIndicatorImageRect)
            g.DrawEllipse(Pens.Black, expansionIndicatorImageRect)
        Finally
            If Not g Is Nothing Then
                g.Dispose()
            End If
        End Try

        ' Assign the images to the tree.
        Me.ultraTree1.ExpansionIndicatorImageCollapsed = expansionIndicatorImageCollapsed
        Me.ultraTree1.ExpansionIndicatorImageExpanded = expansionIndicatorImageExpanded
        Me.ultraTree1.ExpansionIndicatorImageCollapsedHotTracked = expansionIndicatorImageCollapsedHotTracked
        Me.ultraTree1.ExpansionIndicatorImageExpandedHotTracked = expansionIndicatorImageExpandedHotTracked


C#Copy Code
using Infragistics.Win.UltraWinTree;

           // Define the width and height of the expansion indicators. All of the images need to
           // be the same size.
           const int expansionIndicatorImageWidth = 15;
           const int expansionIndicatorImageHeight = 15;

           // Set the ExpansionIndicatorSize on the tree.
           this.ultraTree1.ExpansionIndicatorSize = new Size(expansionIndicatorImageWidth, expansionIndicatorImageHeight);

           // Set the ExpansionIndicatorPadding.
           this.ultraTree1.ExpansionIndicatorPadding = 3;

           // Tell the tree to hide the expansion indicators whenever the mouse is not over it.
           this.ultraTree1.HideExpansionIndicators = HideExpansionIndicators.OnMouseLeave;

           // Create a rect one pixel smaller than the size of the indicators. We will use this to
           // draw the ellipses in the indicator images so they don't get clipped.
           Rectangle expansionIndicatorImageRect = new Rectangle(0, 0, expansionIndicatorImageWidth-1, expansionIndicatorImageHeight-1);

           // Create a new bitmap for each state of the expansion indicators.
           Bitmap expansionIndicatorImageCollapsed = new Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight);
           Bitmap expansionIndicatorImageExpanded = new Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight);
           Bitmap expansionIndicatorImageCollapsedHotTracked = new Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight);
           Bitmap expansionIndicatorImageExpandedHotTracked = new Bitmap(expansionIndicatorImageWidth, expansionIndicatorImageHeight);
           
           // Draw the collapsed expansion indicator image.
           // A red circle.
           using(Graphics g = Graphics.FromImage(expansionIndicatorImageCollapsed))
           {
               g.Clear(Color.Transparent);
               g.FillEllipse(Brushes.Red, expansionIndicatorImageRect);
           }

           // Draw the expanded expansion indicator image.
           // A green circle.
           using (Graphics g = Graphics.FromImage(expansionIndicatorImageExpanded))
           {
               g.Clear(Color.Transparent);
               g.FillEllipse(Brushes.Green, expansionIndicatorImageRect);
           }

           // Draw the collapsed expansion indicator image.
           // A red circle with a black border around it.
           using (Graphics g = Graphics.FromImage(expansionIndicatorImageCollapsedHotTracked))
           {
               g.Clear(Color.Transparent);
               g.FillEllipse(Brushes.Red, expansionIndicatorImageRect);
               g.DrawEllipse(Pens.Black, expansionIndicatorImageRect);
           }

           // Draw the collapsed expansion indicator image.
           // A green circle with a black border around it.
           using (Graphics g = Graphics.FromImage(expansionIndicatorImageExpandedHotTracked))
           {
               g.Clear(Color.Transparent);
               g.FillEllipse(Brushes.Green, expansionIndicatorImageRect);
               g.DrawEllipse(Pens.Black, expansionIndicatorImageRect);
           }

           // Assign the images to the tree.
           this.ultraTree1.ExpansionIndicatorImageCollapsed = expansionIndicatorImageCollapsed;
           this.ultraTree1.ExpansionIndicatorImageExpanded = expansionIndicatorImageExpanded;
           this.ultraTree1.ExpansionIndicatorImageCollapsedHotTracked = expansionIndicatorImageCollapsedHotTracked;
           this.ultraTree1.ExpansionIndicatorImageExpandedHotTracked = expansionIndicatorImageExpandedHotTracked;

See Also