private Rectangle GetAdjustedEditingControlBounds(Rectangle editingControlBounds, DataGridViewCellStyle cellStyle)
{
Debug.Assert(cellStyle.WrapMode != DataGridViewTriState.NotSet);
Debug.Assert(DataGridView is not null);
int originalWidth = editingControlBounds.Width;
if (DataGridView.EditingControl is TextBox txtEditingControl)
{
switch (cellStyle.Alignment)
{
case DataGridViewContentAlignment.TopLeft:
case DataGridViewContentAlignment.MiddleLeft:
case DataGridViewContentAlignment.BottomLeft:
// Add 3 pixels on the left of the editing control to match non-editing text position
if (DataGridView.RightToLeftInternal)
{
editingControlBounds.X += 1;
editingControlBounds.Width = Math.Max(0, editingControlBounds.Width - DATAGRIDVIEWTEXTBOXCELL_horizontalTextOffsetLeft - 2);
}
else
{
editingControlBounds.X += DATAGRIDVIEWTEXTBOXCELL_horizontalTextOffsetLeft;
editingControlBounds.Width = Math.Max(0, editingControlBounds.Width - DATAGRIDVIEWTEXTBOXCELL_horizontalTextOffsetLeft - 1);
}
break;
case DataGridViewContentAlignment.TopCenter:
case DataGridViewContentAlignment.MiddleCenter:
case DataGridViewContentAlignment.BottomCenter:
editingControlBounds.X += 1;
editingControlBounds.Width = Math.Max(0, editingControlBounds.Width - 3);
break;
case DataGridViewContentAlignment.TopRight:
case DataGridViewContentAlignment.MiddleRight:
case DataGridViewContentAlignment.BottomRight:
// Shorten the editing control by 5 pixels to match non-editing text position
if (DataGridView.RightToLeftInternal)
{
editingControlBounds.X += DATAGRIDVIEWTEXTBOXCELL_horizontalTextOffsetRight - 1;
editingControlBounds.Width = Math.Max(0, editingControlBounds.Width - DATAGRIDVIEWTEXTBOXCELL_horizontalTextOffsetRight);
}
else
{
editingControlBounds.X += 1;
editingControlBounds.Width = Math.Max(0, editingControlBounds.Width - DATAGRIDVIEWTEXTBOXCELL_horizontalTextOffsetRight - 1);
}
break;
}
switch (cellStyle.Alignment)
{
case DataGridViewContentAlignment.TopLeft:
case DataGridViewContentAlignment.TopCenter:
case DataGridViewContentAlignment.TopRight:
editingControlBounds.Y += DATAGRIDVIEWTEXTBOXCELL_verticalTextOffsetTop;
editingControlBounds.Height = Math.Max(0, editingControlBounds.Height - DATAGRIDVIEWTEXTBOXCELL_verticalTextOffsetTop);
break;
case DataGridViewContentAlignment.MiddleLeft:
case DataGridViewContentAlignment.MiddleCenter:
case DataGridViewContentAlignment.MiddleRight:
editingControlBounds.Height++;
break;
case DataGridViewContentAlignment.BottomLeft:
case DataGridViewContentAlignment.BottomCenter:
case DataGridViewContentAlignment.BottomRight:
editingControlBounds.Height = Math.Max(0, editingControlBounds.Height - DATAGRIDVIEWTEXTBOXCELL_verticalTextOffsetBottom);
break;
}
int preferredHeight;
if (cellStyle.WrapMode == DataGridViewTriState.False)
{
preferredHeight = txtEditingControl.PreferredSize.Height;
}
else
{
string editedFormattedValue = (string)((IDataGridViewEditingControl)txtEditingControl).GetEditingControlFormattedValue(DataGridViewDataErrorContexts.Formatting);
if (string.IsNullOrEmpty(editedFormattedValue))
{
editedFormattedValue = " ";
}
TextFormatFlags flags = DataGridViewUtilities.ComputeTextFormatFlagsForCellStyleAlignment(DataGridView.RightToLeftInternal, cellStyle.Alignment, cellStyle.WrapMode);
using var screen = GdiCache.GetScreenDCGraphics();
preferredHeight = MeasureTextHeight(screen, editedFormattedValue, cellStyle.Font, originalWidth, flags);
}
if (preferredHeight < editingControlBounds.Height)
{
switch (cellStyle.Alignment)
{
case DataGridViewContentAlignment.TopLeft:
case DataGridViewContentAlignment.TopCenter:
case DataGridViewContentAlignment.TopRight:
// Single pixel move - leave it as is for now
break;
case DataGridViewContentAlignment.MiddleLeft:
case DataGridViewContentAlignment.MiddleCenter:
case DataGridViewContentAlignment.MiddleRight:
editingControlBounds.Y += (editingControlBounds.Height - preferredHeight) / 2;
break;
case DataGridViewContentAlignment.BottomLeft:
case DataGridViewContentAlignment.BottomCenter:
case DataGridViewContentAlignment.BottomRight:
editingControlBounds.Y += editingControlBounds.Height - preferredHeight;
break;
}
}
}
return(editingControlBounds);
}