Tab key in grid with groups

[Simon]

Hi

I have a radGridView with groups that has two read only columns and one editable column. Using the tab key within a group works fine - it tabs to the only editable cell in the next row and I can immediately start typing in that cell. However when I get to the last row in the group and hit the tab key, it tabs to the group header row of the next group. I hit the tab key again and it tabs to the first read only cell in the first row for the group. The next tab goes to the second read only cell and the next tab goes to the first editable cell, but I can't type in that cell without first clicking in it. Is there any way I can get the tab from the last row of a group to the first editable cell of the first row in the next group?

[Dess | Tech Support Engineer, Principal]

Hello Simon, 

Thank you for writing.  

RadGridView manages user mouse and keyboard input over its rows by GridRowBehavior. Depending on the row type, RadGridView introduces different behaviors. The following help article is quite useful on this topic and it demonstrates a simple approach how to handle keyboard input and achieve the desired behavior: http://docs.telerik.com/devtools/winforms/gridview/rows/row-behaviors

I hope this information helps. Should you have further questions I would be glad to help.

Regards,
Dess
Telerik by Progress

[Simon]

Hi Dess

That didn't seem to do anything, maybe because I don't actually have a hierarchical grid. I use group descriptors to create the groups, ie

 

   Dim descriptor1 As New GroupDescriptor()
                descriptor1.GroupNames.Add("colHeadingID", ListSortDirection.Ascending)
                dgv.GroupDescriptors.Add(descriptor1)

Is there any way to make the tab key work as described for this kind of grid?

[Simon]

Hi Dess

That didn't seem to do anything, maybe because I don't have a hierarchical grid. I set the groups up using group descriptors, ie

   Dim descriptor1 As New GroupDescriptor()
                descriptor1.GroupNames.Add("colHeadingID", ListSortDirection.Ascending)
                dgv.GroupDescriptors.Add(descriptor1)

Is there any way to make the tab key work as described for this kind of grid?

[Dess | Tech Support Engineer, Principal]

Hello Simon, 

Thank you for writing back. 

Here is a sample code snippet demonstrating how to handle pressing the Tab key and navigate to the next editable cell no matter if it is in the next group or not: 

public RadForm1()
{
    InitializeComponent();

    this.radGridView1.Columns.Add("Id");
    this.radGridView1.Columns.Add("Name");
    this.radGridView1.Columns.Add("IsActive");

    for (int i = 0; i < 10; i++)
    {
        this.radGridView1.Rows.Add(i, "Item" + i, i % 2 == 0);
    }
    this.radGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;

    this.radGridView1.Columns[0].ReadOnly = true;
    this.radGridView1.Columns[1].ReadOnly = true;
    this.radGridView1.MasterTemplate.ShowGroupedColumns = true;

    GroupDescriptor descriptor = new GroupDescriptor();
    descriptor.GroupNames.Add("IsActive", ListSortDirection.Ascending);
    this.radGridView1.GroupDescriptors.Add(descriptor);

    //register the custom row  behavior
    BaseGridBehavior gridBehavior = radGridView1.GridBehavior as BaseGridBehavior;
    gridBehavior.UnregisterBehavior(typeof(GridViewDataRowInfo));
    gridBehavior.RegisterBehavior(typeof(GridViewDataRowInfo), new CustomGridDataRowBehavior());

    this.radGridView1.PreviewKeyDown += RadGridView1_PreviewKeyDown;
}

private void RadGridView1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
    if (e.KeyData == Keys.Tab && this.radGridView1.CurrentRow is GridViewGroupRowInfo)
    {
         this.radGridView1.CurrentRow = this.radGridView1.CurrentRow.ChildRows.First();
     }
}

public class CustomGridDataRowBehavior : GridDataRowBehavior
{
    protected override bool ProcessTabKey(KeyEventArgs keys)
    {
        bool result = base.ProcessTabKey(keys);
        while (this.GridViewElement.CurrentColumn.ReadOnly)
        {
            this.GridViewElement.Navigator.SelectNextColumn();
        }
        if (this.GridViewElement.CurrentRow is GridViewGroupRowInfo)
        {
            this.GridViewElement.CurrentRow = this.GridViewElement.CurrentRow.ChildRows.First();
        }
        return result;
    }
}

private void RadForm1_Load(object sender, EventArgs e)
{
    foreach (GridViewRowInfo row in this.radGridView1.ChildRows)
    {
        row.IsExpanded = true;
    }
}

I hope this information helps. If you have any additional questions, please let me know. 

Regards,
Dess
Telerik by Progress