/// <summary>
/// Adjusts the column width relative to the given <see cref="MultiHeaderCell"/> based on its width.
/// </summary>
/// <param name="headerCell">A <see cref="MultiHeaderCell"/> object.</param>
private void AdjustColumnsWidth(MultiHeaderCell headerCell)
{
if (headerCell == null || !AutoSizeColumnsBasedOnAdditionalHeadersContent || AutoSizeColumnsMode == DataGridViewAutoSizeColumnsMode.None)
{
return;
}
// Calculate the total width of the base columns the headerCell spans
var spanningInfo = MultiHeaderCellsSpanningInfo.GetHeaderCellSpanningInfo(this, headerCell);
// Nothing to do if the spanning columns width already accomodates space for the computed headerCell's width
if (spanningInfo.TotalSpanningWidth >= headerCell.CellSize.Width)
{
return;
}
// Re-adjust grid's columns widths spanned by the headerCell
int remainder;
int proportionalWidthToIncrease = Math.DivRem(headerCell.CellSize.Width - spanningInfo.VisibleWidth, headerCell.ColumnSpan, out remainder);
if (remainder > 0)
{
proportionalWidthToIncrease++;
}
int lastColumnIndex = headerCell.GetLastBaseColumnIndexFromSpan(Columns.Count);
for (int idx = headerCell.ColumnIndex; idx <= lastColumnIndex; idx++)
{
DataGridViewColumn spanningColumn = Columns[idx];
int newWidth = spanningColumn.Width + proportionalWidthToIncrease;
_skipColumnWidthsAdjustment = true;
spanningColumn.AutoSizeMode = DataGridViewAutoSizeColumnMode.None;
spanningColumn.Width = newWidth;
_skipColumnWidthsAdjustment = false;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="HeaderCellTextChangedArgs"/> class.
/// </summary>
/// <param name="headerCell">The <see cref="MultiHeaderCell"/> object whose column span changed.</param>
/// <param name="oldText">The old value of the <see cref="MultiHeaderCell.Text"/> property.</param>
public HeaderCellTextChangedArgs(MultiHeaderCell headerCell, string oldText)
{
HeaderCell = headerCell;
OldText = oldText;
}
/// <summary>
/// Initializes a new instance of the <see cref="HeaderCellColumnSpanChangedArgs"/> class.
/// </summary>
/// <param name="headerCell">The <see cref="MultiHeaderCell"/> object whose column span changed.</param>
/// <param name="oldColumnSpan">The old value of the <see cref="MultiHeaderCell.ColumnSpan"/> property.</param>
public HeaderCellColumnSpanChangedArgs(MultiHeaderCell headerCell, int oldColumnSpan)
{
HeaderCell = headerCell;
OldColumnSpan = oldColumnSpan;
}