In addition to the standard mouse events (i.e. MouseDown, MouseMove, MouseUp, MouseEnter, MouseLeave etc.) all PLF based controls expose two new events called MouseEnterElement and MouseLeaveElement . The following code writes the type of each element as it is entered and exited to the output window.
In Visual Basic:
Private Sub UltraGrid1_MouseEnterElement(ByVal sender As Object, _
ByVal e As Infragistics.Win.UIElementEventArgs) _
Handles UltraGrid1.MouseEnterElement
Debug.WriteLine("Enter Element: " + e.Element.GetType().ToString())
End Sub
Private Sub UltraGrid1_MouseLeaveElement(ByVal sender As Object, _
ByVal e As Infragistics.Win.UIElementEventArgs) _
Handles UltraGrid1.MouseLeaveElement
Debug.WriteLine("Leave Element: " + e.Element.GetType().ToString())
End Sub
In C#:
using System.Diagnostics;
private void ultraGrid1_MouseEnterElement(object sender,
Infragistics.Win.UIElementEventArgs e)
{
Debug.WriteLine( "Enter Element: " + e.Element.GetType().ToString() );
}
private void ultraGrid1_MouseLeaveElement(object sender,
Infragistics.Win.UIElementEventArgs e)
{
Debug.WriteLine( "Leave Element: " + e.Element.GetType().ToString() );
}
There are also methods for getting an element from a point and finding out its context information.
The following code shows how to get the element under the point where the user presses the mouse down and gets its context information—in this case a grid cell.
In Visual Basic:
Imports Infragistics.Win.UltraWinGrid
Private Sub UltraGrid1_MouseDown(ByVal sender As Object, ByVal e As _
System.Windows.Forms.MouseEventArgs) Handles UltraGrid1.MouseDown
Dim mainElement As Infragistics.Win.UIElement
Dim element As Infragistics.Win.UIElement
mainElement = Me.UltraGrid1.DisplayLayout.UIElement
element = mainElement.ElementFromPoint(New Point(e.X, e.Y))
If (Not element Is Nothing) Then
Dim cell As UltraGridCell
cell = element.GetContext(GetType(UltraGridCell))
If (Not cell Is Nothing) Then
Debug.WriteLine("Cell text: " + cell.Text)
End If
Debug.WriteLine("Mouse down on an " + element.GetType().ToString())
Debug.Indent()
' Walk up the parent element chain and write out a line
' for each parent element.
While Not element.Parent Is Nothing
element = element.Parent
Debug.WriteLine("is a child of an " + element.GetType().ToString())
Debug.Indent()
End While
' reset the indent level
Debug.IndentLevel = 0
End If
End Sub
In C#:
using System.Diagnostics;
using Infragistics.Win.UltraWinGrid;
private void ultraGrid1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{
Infragistics.Win.UIElement mainElement;
Infragistics.Win.UIElement element;
mainElement = this.ultraGrid1.DisplayLayout.UIElement;
element = mainElement.ElementFromPoint(new Point(e.X, e.Y));
if (element != null)
{
UltraGridCell cell = element.GetContext(typeof(UltraGridCell))
as UltraGridCell;
if (cell != null)
Debug.WriteLine("Cell text: " + cell.Text);
Debug.WriteLine("Mouse down on an " +
element.GetType().ToString());
Debug.Indent();
// Walk up the parent element chain and write out a line
// for each parent element.
while (element.Parent != null)
{
element = element.Parent;
Debug.WriteLine("is a child of an " + element.GetType().ToString());
Debug.Indent();
}
// reset the indent level
Debug.IndentLevel = 0;
}
}