//=====================================================================
/// <summary>
/// This is used to notify the data grid view of a change that may require it to resize the column and
/// possibly the row.
/// </summary>
protected void OnCommonChange()
{
if (base.DataGridView != null && !base.DataGridView.IsDisposed && !base.DataGridView.Disposing)
{
if (base.RowIndex == -1)
{
DataGridViewHelper.OnColumnCommonChange(base.DataGridView, base.ColumnIndex);
}
else
{
DataGridViewHelper.OnCellCommonChange(base.DataGridView, base.ColumnIndex, base.RowIndex);
}
}
}
/// <summary>
/// Gets the image to display in the cell
/// </summary>
/// <param name="value">The value to be use in determining the image</param>
/// <param name="rowIndex">The index of the cell's parent row</param>
/// <returns>The image that should be displayed in the cell</returns>
protected override object GetCellImage(object value, int rowIndex)
{
RatingColumn owner = base.OwningColumn as RatingColumn;
// If this is a shared cell, we don't want to draw hot images as they may end up in several places.
// As such, only draw them if the mouse is in the cell being drawn.
Point mouseCell = DataGridViewHelper.MouseEnteredCellAddress(base.DataGridView);
if (owner != null)
{
return(owner.DrawImage(value, rowIndex,
(mouseCell.X == owner.Index && mouseCell.Y == rowIndex) ? this.MouseRating : -1));
}
return(null);
}
/// <summary>
/// Indicates whether a row will be unshared when the mouse pointer moves over a cell in the row
/// </summary>
/// <param name="rowIndex">The index of the row containing the cell</param>
/// <returns>True if the mouse is in the cell in which the mouse button was pressed, otherwise false</returns>
protected override bool MouseEnterUnsharesRow(int rowIndex)
{
Point cell = DataGridViewHelper.MouseDownCellAddress(base.DataGridView);
return(base.ColumnIndex == cell.X && rowIndex == cell.Y);
}