How to display a context menu in an ultra grid

 Hi,

How to display a context menu in an ultra grid if and only if the user clicks on a particular row. And the row or cell should not be header or blank cell/row.

Regards,

SreeRam

Hi SreeRam,

You can't apply a context menu to a part of a control. What you would have to do is apply the context menu to the entire control depending on the location of the mouse. I would use the MouseEnterElement and MouseLeaveElement events of the grid to assign and remove the context menu. You can use the GetContext method on the UIElement being entered to get the row (or null) and either set or remove the context menu on the grid control. 

 Hi Mike,

As you said we can't apply a context menu to a part of a control if we choose the "ContextMenuStrip" property for ultragrid control. I tried MouseDown event to assign or remove the context menu. Although the below code works fine if and only if you remove the "ContextMenuStrip" property for ultragrid control. Because it overrides the below code and displays the context menu whereever you click the mouse within the control.

 

********************************************************************************

private void ugQueue_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                Point mousePoint = new Point(e.X, e.Y);
                UIElement element = ((UltraGrid)sender).DisplayLayout.UIElement.ElementFromPoint(mousePoint);

                UltraGridCell cell = element.GetContext(typeof(UltraGridCell)) as UltraGridCell;

                if (cell != null)
                {
                    if (Convert.ToByte(cell.Row.Cells["Status"].Value) == 0)
                    {
                        cmnuQueue.Show(ugQueue, mousePoint);
                        cell.Row.Selected = true;
                    }
                    else
                        return;
                }
            }
        }

********************************************************************************

Thanks Mike.

With Regards,

SreeRam. 

That's another good way to do it. I would recommend using MouseUp instead of MouseDown, though. If you try this with any Windows application, you can see that context menus are always display in the MouseUp. Displaying a context menu in MouseDown can cause problems because the control gets a MouseDown, but the MouseUp message is lost. 

I would like to know if I right-clicked on the cell header.  How do I do this?

My current code:

    Private Sub ugCommission_MouseUp(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles ugCommission.MouseUp
 
        Dim cmItemNum As New ContextMenuStrip
        Dim cmCommDue As New ContextMenuStrip
 
        If e.Button = Windows.Forms.MouseButtons.Right Then
 
            Dim ptCurrent As Point = New Point(e.X, e.Y)
            Dim uiElement As Infragistics.Win.UIElement = CType(sender, UltraGrid).DisplayLayout.UIElement.ElementFromPoint(ptCurrent)
            Dim ugCell As UltraGridCell = uiElement.GetContext(GetType(UltraGridCell))
            Dim ugRow As UltraGridRow = uiElement.GetContext(GetType(UltraGridRow))
            ' Thought ugUIElement would be it, but it is also nothing when I right click on the col header cell
            Dim ugUIElement As UltraGridUIElement = uiElement.GetContext(GetType(UltraGridUIElement))
 
            If ugCell IsNot Nothing Then
 
                ugCommission.Selected.Rows.Clear()
 
                ugRow.Selected = True
 
                If ugCell.Column.Key = "ITEM_NUM" Then
 
                    _cmItemNum.Show(ugCommission, ptCurrent)
 
                ElseIf ugCell.Column.Key = "COMM_DUE" Then
 
                    _cmCommDue.Show(ugCommission, ptCurrent)
 
                End If
 
            End If
 
        End If
 
    End Sub

Hi,

As I understood that you want to know whether the user clicked on the column header or not? If this is correct, You can use the below code to detect whether the user clicks on the column header or not. If I misunderstood your scenario please elaborate your question so that I can help.

Dim ugColl As UltraGridColumn = uiElement.GetContext(GetType(UltraGridColumn))

If (ugCell Is Nothing And ugColl IsNot Nothing) Then
        ' your code goes here

End If

[quote user="dpbouchard"]

I would like to know if I right-clicked on the cell header.  How do I do this?

My current code:

    Private Sub ugCommission_MouseUp(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles ugCommission.MouseUp
 
        Dim cmItemNum As New ContextMenuStrip
        Dim cmCommDue As New ContextMenuStrip
 
        If e.Button = Windows.Forms.MouseButtons.Right Then
 
            Dim ptCurrent As Point = New Point(e.X, e.Y)
            Dim uiElement As Infragistics.Win.UIElement = CType(sender, UltraGrid).DisplayLayout.UIElement.ElementFromPoint(ptCurrent)
            Dim ugCell As UltraGridCell = uiElement.GetContext(GetType(UltraGridCell))
            Dim ugRow As UltraGridRow = uiElement.GetContext(GetType(UltraGridRow))
            ' Thought ugUIElement would be it, but it is also nothing when I right click on the col header cell
            Dim ugUIElement As UltraGridUIElement = uiElement.GetContext(GetType(UltraGridUIElement))
 
            If ugCell IsNot Nothing Then
 
                ugCommission.Selected.Rows.Clear()
 
                ugRow.Selected = True
 
                If ugCell.Column.Key = "ITEM_NUM" Then
 
                    _cmItemNum.Show(ugCommission, ptCurrent)
 
                ElseIf ugCell.Column.Key = "COMM_DUE" Then
 
                    _cmCommDue.Show(ugCommission, ptCurrent)
 
                End If
 
            End If
 
        End If
 
    End Sub

[/quote]

 

Hi,

I assume by "cell header" that you mean the column header.

You can do this using basically the same code you have here. You just check for a ColumnHeader type when you call GetContext.

By the way, you can simplify your code here a little bit by using the LastElementEntered property instead of messing around with points.

    Private Sub UltraGrid1_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles UltraGrid1.MouseDown
        Dim grid As UltraGrid = CType(sender, UltraGrid)

        If e.Button = Windows.Forms.MouseButtons.Right Then
            Dim element As UIElement = grid.DisplayLayout.UIElement.LastElementEntered

            Dim ugCell As UltraGridCell = element.GetContext(GetType(UltraGridCell))
            Dim ugRow As UltraGridRow = element.GetContext(GetType(UltraGridRow))
            Dim columnHeader As ColumnHeader = element.GetContext(GetType(ColumnHeader))

            If columnHeader IsNot Nothing Then
                MessageBox.Show(columnHeader.Caption)
            End If
        End If
    End Sub

 

 

 

Hi,

As mike said you can also try with ColumnHeader. But the coding pattern remains same.