/// <summary>
/// This is used to compute the text bounds for the cell based on the cell bounds, cell style, and the
/// formatting flags in effect.
/// </summary>
/// <param name="cellBounds">The cell bounds</param>
/// <param name="text">The cell text</param>
/// <param name="flags">The text formatting flags</param>
/// <param name="cellStyle">The cell style</param>
/// <param name="font">The font</param>
/// <returns>The bounds of the cell's text</returns>
protected static Rectangle GetTextBounds(Rectangle cellBounds, string text, TextFormatFlags flags,
DataGridViewCellStyle cellStyle, Font font)
{
if ((flags & TextFormatFlags.SingleLine) != TextFormatFlags.GlyphOverhangPadding &&
TextRenderer.MeasureText(text, font, new Size(Int32.MaxValue, Int32.MaxValue), flags).Width > cellBounds.Width)
{
flags |= TextFormatFlags.EndEllipsis;
}
Size proposedSize = new Size(cellBounds.Width, cellBounds.Height);
Size size = TextRenderer.MeasureText(text, font, proposedSize, flags);
if (size.Width > proposedSize.Width)
{
size.Width = proposedSize.Width;
}
if (size.Height > proposedSize.Height)
{
size.Height = proposedSize.Height;
}
if (size == proposedSize)
{
return(cellBounds);
}
return(new Rectangle(BaseDataGridViewCell.GetTextLocation(cellBounds, size, flags, cellStyle), size));
}
/// <summary>
/// Returns the bounding rectangle that encloses the cell's content area, which is calculated using the
/// specified graphics context and cell style.
/// </summary>
/// <param name="graphics">The graphics context</param>
/// <param name="cellStyle">The cell style to apply to the cell</param>
/// <param name="rowIndex">The index of the cell's parent row</param>
/// <returns>The <see cref="Rectangle"/> that bounds the cell's contents</returns>
/// <remarks>For null cells, a default rectangle is returned so that mouse clicks near its center will
/// initiate editing.</remarks>
protected override Rectangle GetContentBounds(Graphics graphics, DataGridViewCellStyle cellStyle,
int rowIndex)
{
ImageListColumn owner;
Rectangle r = base.GetContentBounds(graphics, cellStyle, rowIndex);
Size cellSize, imageSize;
// For null cells, use a default rectangle so that it enters edit mode if the middle area of the
// empty cell is clicked.
if (r == Rectangle.Empty)
{
TextFormatFlags flags = BaseDataGridViewCell.ComputeTextFormatFlagsForCellStyleAlignment(
base.DataGridView.RightToLeft == RightToLeft.Yes, cellStyle.Alignment, cellStyle.WrapMode);
cellSize = base.GetSize(rowIndex);
owner = base.OwningColumn as ImageListColumn;
if (owner == null || owner.ImageList == null)
{
imageSize = cellSize;
}
else
{
imageSize = owner.ImageList.ImageSize;
}
r = new Rectangle(new Point(0, 0), cellSize);
// When stretched, the image covers the whole cell so it doesn't need to be limited
if (base.ImageLayout != DataGridViewImageCellLayout.Stretch)
{
r = new Rectangle(BaseDataGridViewCell.GetTextLocation(r, imageSize, flags, cellStyle),
imageSize);
}
}
return(r);
}
