/// <summary>
/// Gets a control from a position in a TableLayoutPanel.
/// Note: when no control was found, each control is checked on it's own because of bugs in the layout engine from Microsoft.
/// </summary>
/// <typeparam name="TControl">The type of the control.</typeparam>
/// <param name="This">This TableLayoutPanel.</param>
/// <param name="column">The column.</param>
/// <param name="row">The row.</param>
/// <returns>
/// The control or <c>null</c>.
/// </returns>
public static TControl GetControlFromPositionFixed <TControl>(this TableLayoutPanel This, int column, int row) where TControl : Control
{
#if NET35
Debug.Assert(This != null);
#else
Contract.Requires(This != null);
#endif
return(This.GetControlFromPositionFixed(column, row) as TControl);
}
/// <summary>
/// Copies the last row of a This and all controls in it.
/// </summary>
/// <param name="This">This TableLayoutPanel.</param>
/// <param name="controlCallback">The control callback if any, passing targetRow,targetColumn,sourceControl,targetControl.</param>
/// <param name="allowSuspendingLayout">if set to <c>true</c> allows suspending the This layout during this process to prevent flickering.</param>
public static void CopyLastRow(this TableLayoutPanel This, Action <int, int, Control, Control> controlCallback = null, bool allowSuspendingLayout = true)
{
#if NET35
Debug.Assert(This != null);
#else
Contract.Requires(This != null);
#endif
if (allowSuspendingLayout)
{
This.SuspendLayout();
}
var lastRow = This.RowCount - 1;
// add line
This.RowCount++;
// add style
var rowStyle = This.RowStyles[lastRow];
This.RowStyles.Add(new RowStyle(rowStyle.SizeType, rowStyle.Height));
// copy controls
var alreadyVisitedControls = new Dictionary <Control, bool>();
for (var i = This.ColumnCount; i > 0;)
{
--i;
var control = This.GetControlFromPositionFixed(i, lastRow);
if (control == null || !alreadyVisitedControls.TryAdd(control, true))
{
continue;
}
var newControl = control.Duplicate();
if (controlCallback != null)
{
controlCallback(lastRow + 1, i, control, newControl);
}
This.Controls.Add(newControl, i, lastRow + 1);
This.SetRowSpan(newControl, This.GetRowSpan(control));
This.SetColumnSpan(newControl, This.GetColumnSpan(control));
}
if (allowSuspendingLayout)
{
This.ResumeLayout(true);
}
}
/// <summary>
/// Gets a value from a control in the given column and row.
/// </summary>
/// <typeparam name="TControl">The type of the control which should be there.</typeparam>
/// <typeparam name="TType">The type of the value we want to read from it.</typeparam>
/// <param name="This">This TableLayoutPanel.</param>
/// <param name="row">The row in which the control should be.</param>
/// <param name="columnIndex">The column in which the control should be.</param>
/// <param name="reader">The reader delegate which reads the actual value from the given control and returns it.</param>
/// <returns>The value that was found.</returns>
public static TType GetColumnValue <TControl, TType>(this TableLayoutPanel This, uint row, int columnIndex, Func <TControl, TType> reader) where TControl : Control
{
#if NET35
Debug.Assert(This != null);
#else
Contract.Requires(This != null);
#endif
if (row >= This.RowCount)
{
throw new ArgumentOutOfRangeException("row", row, "Not Allowed");
}
var control = This.GetControlFromPositionFixed <TControl>(columnIndex, (int)row);
if (control == null)
{
throw new NotSupportedException();
}
return(reader(control));
}