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Overriding Default Cursor Movement

Background

In some user environments the user may need to have the WinGrid™ move the cursor in a manner similar to Excel. The PerformAction method of the WinGrid provides the developer with almost unlimited flexibility when overriding the normal behavior.

Questions

  • How do I get WinGrid to move the active cell with the cursor movement keys similar to Excel?

Solution

Use PerformAction to override the normal cursor movement behavior.

Sample Project

This sample project displays a sample DataTable and allows the user to move the cursor with the arrow keys.

The UltraGrid Events region consists of the following event handlers:

  • UltraGrid1.KeyDown - The code in the KeyDown event invokes the appropriate PerformAction methods for each of the cursor movement key strokes:

In Visual Basic:

Imports Infragistics.Win.UltraWinGrid
...
Private Sub UltraGrid1_KeyDown(ByVal sender As Object, _
  ByVal e As System.Windows.Forms.KeyEventArgs) _
  Handles UltraGrid1.KeyDown
	' Perform action needed to move cursor
	Select Case e.KeyValue
		Case Keys.Up
			Me.UltraGrid1.PerformAction(UltraGridAction.ExitEditMode, False, False)
			Me.UltraGrid1.PerformAction(UltraGridAction.AboveCell, False, False)
			e.Handled = True
			Me.UltraGrid1.PerformAction(UltraGridAction.EnterEditMode, False, False)
		Case Keys.Down
			Me.UltraGrid1.PerformAction(UltraGridAction.ExitEditMode, False, False)
			Me.UltraGrid1.PerformAction(UltraGridAction.BelowCell, False, False)
			e.Handled = True
			Me.UltraGrid1.PerformAction(UltraGridAction.EnterEditMode, False, False)
		Case Keys.Right
			Me.UltraGrid1.PerformAction(UltraGridAction.ExitEditMode, False, False)
			Me.UltraGrid1.PerformAction(UltraGridAction.NextCellByTab, False, False)
			e.Handled = True
			Me.UltraGrid1.PerformAction(UltraGridAction.EnterEditMode, False, False)
		Case Keys.Left
			Me.UltraGrid1.PerformAction(UltraGridAction.ExitEditMode, False, False)
			Me.UltraGrid1.PerformAction(UltraGridAction.PrevCellByTab, False, False)
			e.Handled = True
			Me.UltraGrid1.PerformAction(UltraGridAction.EnterEditMode, False, False)
	End Select
End Sub

In C#:

using Infragistics.Win.UltraWinGrid;
...
private void ultraGrid1_KeyDown(object sender, KeyEventArgs e)
{
	// Perform action needed to move cursor
	switch(e.KeyCode)
	{
		case Keys.Up:
			this.ultraGrid1.PerformAction(UltraGridAction.ExitEditMode, false,
			  false);
			this.ultraGrid1.PerformAction(UltraGridAction.AboveCell, false,
			  false);
			e.Handled = true;
			this.ultraGrid1.PerformAction(UltraGridAction.EnterEditMode, false,
			  false);
			break;
		case Keys.Down:
			this.ultraGrid1.PerformAction(UltraGridAction.ExitEditMode, false,
			  false);
			this.ultraGrid1.PerformAction(UltraGridAction.BelowCell, false,
			  false);
			e.Handled = true;
			this.ultraGrid1.PerformAction(UltraGridAction.EnterEditMode, false,
			  false);
			break;
		case Keys.Right:
			this.ultraGrid1.PerformAction(UltraGridAction.ExitEditMode, false,
			  false);
			this.ultraGrid1.PerformAction(UltraGridAction.NextCellByTab, false,
			  false);
			e.Handled = true;
			this.ultraGrid1.PerformAction(UltraGridAction.EnterEditMode, false,
			  false);
			break;
		case Keys.Left:
			this.ultraGrid1.PerformAction(UltraGridAction.ExitEditMode, false,
			  false);
			this.ultraGrid1.PerformAction(UltraGridAction.PrevCellByTab, false,
			  false);
			e.Handled = true;
			this.ultraGrid1.PerformAction(UltraGridAction.EnterEditMode, false,
			  false);
			break;
	}
}

  • UltraGrid1.InitializeLayout - The code in the InitializeLayout event overrides the background color of the active cell:

In Visual Basic:

Private Sub UltraGrid1_InitializeLayout(ByVal sender As Object, _
  ByVal e As Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs) _
  Handles UltraGrid1.InitializeLayout
	' Set background color of Active Cell
	Me.UltraGrid1.DisplayLayout.Override.ActiveCellAppearance.BackColor = Color.Red
End Sub

In C#:

private void ultraGrid1_InitializeLayout(object sender,
  Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
{
	// Set background color of Active Cell
	this.ultraGrid1.DisplayLayout.Override.ActiveCellAppearance.BackColor = Color.Red;
}

  • UltraGrid1.Enter - The code in the Enter event sets an Active Row and an Active Cell if they are not already set:

In Visual Basic:

Private Sub UltraGrid1_Enter(ByVal sender As Object, _
  ByVal e As System.EventArgs) Handles UltraGrid1.Enter
	' Set ActiveRow and ActiveCell on grid entry
	If Me.UltraGrid1.ActiveRow Is Nothing Then
		Me.UltraGrid1.ActiveRow = Me.UltraGrid1.GetRow(ChildRow.First)
	End If
	If Me.UltraGrid1.ActiveCell Is Nothing Then
		Me.UltraGrid1.ActiveCell = Me.UltraGrid1.ActiveRow.Cells(2)
	End If
End Sub

In C#:

private void ultraGrid1_Enter(object sender, EventArgs e)
{
	// Set ActiveRow and ActiveCell on grid entry
	if(this.ultraGrid1.ActiveRow == null)
		this.ultraGrid1.ActiveRow = this.ultraGrid1.GetRow(ChildRow.First);
	if(this.ultraGrid1.ActiveCell == null)
		this.ultraGrid1.ActiveCell = this.ultraGrid1.ActiveRow.Cells[2];
}

Review

This sample project shows how to use the PerformAction method of the WinGrid to simulate the cursor movement of Excel.