static Microsoft.Windows.Controls.DataGridCell TryToFindGridCell(Microsoft.Windows.Controls.DataGrid grid, Microsoft.Windows.Controls.DataGridCellInfo cellInfo)
{
Microsoft.Windows.Controls.DataGridCell result = null;
Microsoft.Windows.Controls.DataGridRow row = null;
try
{
grid.ScrollIntoView(cellInfo.Item);
grid.UpdateLayout();
row = (Microsoft.Windows.Controls.DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(cellInfo.Item);
if (row != null)
{
int columnIndex = grid.Columns.IndexOf(cellInfo.Column);
if (columnIndex > -1)
{
Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter presenter = GetVisualChild <Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter>(row);
result = presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex) as Microsoft.Windows.Controls.DataGridCell;
}
}
}
catch (Exception generalException)
{
string error = generalException.Message;
result = null;
}
return(result);
}
public static Microsoft.Windows.Controls.DataGridCell GetCell(Microsoft.Windows.Controls.DataGrid dataGrid, Microsoft.Windows.Controls.DataGridRow rowContainer, int column)
{
if (rowContainer != null)
{
DataGridCellsPresenter presenter = FindVisualChild <DataGridCellsPresenter>(rowContainer);
if (presenter == null)
{
/* if the row has been virtualized away, call its ApplyTemplate() method
* to build its visual tree in order for the DataGridCellsPresenter
* and the DataGridCells to be created */
rowContainer.ApplyTemplate();
presenter = FindVisualChild <DataGridCellsPresenter>(rowContainer);
}
if (presenter != null)
{
Microsoft.Windows.Controls.DataGridCell cell = presenter.ItemContainerGenerator.ContainerFromIndex(column) as Microsoft.Windows.Controls.DataGridCell;
if (cell == null)
{
/* bring the column into view
* in case it has been virtualized away */
dataGrid.ScrollIntoView(rowContainer, dataGrid.Columns[column]);
cell = presenter.ItemContainerGenerator.ContainerFromIndex(column) as Microsoft.Windows.Controls.DataGridCell;
}
return(cell);
}
}
return(null);
}
/// <summary>
/// Gets the cell.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="row">The row.</param>
/// <param name="columnIndex">Index of the column.</param>
/// <returns></returns>
public static Microsoft.Windows.Controls.DataGridCell GetCell(Microsoft.Windows.Controls.DataGrid host, Microsoft.Windows.Controls.DataGridRow row, int columnIndex)
{
if (row == null)
{
return(null);
}
var presenter = GetVisualChild <DataGridCellsPresenter>(row);
if (presenter == null)
{
return(null);
}
// try to get the cell but it may possibly be virtualized
var cell = (Microsoft.Windows.Controls.DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
if (cell == null)
{
// now try to bring into view and retreive the cell
host.ScrollIntoView(row, host.Columns[columnIndex]);
cell = (Microsoft.Windows.Controls.DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
}
return(cell);
}
//When selection changed in combobox (pressing arrow key down or up) must be synchronized with opened Microsoft.Windows.Controls.DataGrid popup
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
base.OnSelectionChanged(e);
if (popupDataGrid == null)
{
return;
}
if (!DesignerProperties.GetIsInDesignMode(this))
{
if (IsDropDownOpen)
{
popupDataGrid.SelectedItem = this.SelectedItem;
if (popupDataGrid.SelectedItem != null)
{
popupDataGrid.ScrollIntoView(popupDataGrid.SelectedItem);
}
}
}
}
