protected override void OnRender(Graphics paint, Rectangle cellRect, string cellValue, CellStyleInfo style, DataColumnBase column, RowColumnIndex rowColumnIndex)
{
int starHeight, starWidth;
Rectangle drawArea;
var padding = 5;
starWidth = 16;
starHeight = 16;
var RadioButtonColumn = column.GridColumn as GridRadioButtonColumn;
drawArea = new Rectangle(cellRect.X + padding, cellRect.Y + ((cellRect.Height / 2) - (starHeight / 2)), starWidth, starHeight);
RadioButtonCollection = new List <GridCellRadioButton>();
for (int i = 0; i < RadioButtonColumn.ItemCount; i++)
{
var radioButton = new GridCellRadioButton();
radioButton.Location = new Point(drawArea.X, drawArea.Y);
radioButton.Width = starWidth;
radioButton.Height = starHeight;
//Draw outer border of RadioButton
radioButton.DrawBorder(paint, Color.Black, drawArea, radioButton);
Point point = new Point(drawArea.X + drawArea.Width + 2, drawArea.Y);
Font font = style.GetFont() != Control.DefaultFont ? style.GetFont() : Control.DefaultFont;
int value = i;
var buttonValue = ((Options)value).ToString();
//Draw string for RadioButton
paint.DrawString(buttonValue, font, new SolidBrush(Color.Gray), point);
if (buttonValue.Equals(cellValue))
{
radioButton.DrawSelectedCheckMark(paint, drawArea, radioButton, Color.Black, Color.Black);
}
//Add RadioButton to Cell
RadioButtonCollection.Add(radioButton);
//Set the start point for next RadioButton
Size stringlenth = TextRenderer.MeasureText((RadioOptions = 0).ToString(), font);
drawArea.X += drawArea.Width + 10 + stringlenth.Width;
}
}
protected override void HighlightSearchText(Graphics paint, DataColumnBase column, CellStyleInfo style,
Rectangle bounds, string cellValue, RowColumnIndex rowColumnIndex)
{
if (AllowHighlightSearchText && !string.IsNullOrEmpty(SearchText))
{
if (column != null && (SearchColumns.Count > 0 && !SearchColumns.Contains(column.GridColumn.MappingName)))
{
return;
}
var searchText = SearchText;
string[] metaCharacters = { "\\", "^", "$", "{", "}", "[", "]", "(", ")", ".", "*", "+", "?", "|", "<", ">", "-", "&" };
if (metaCharacters.Any(searchText.Contains))
{
for (int i = 0; i < metaCharacters.Length; i++)
{
if (searchText.Contains(metaCharacters[i]))
{
searchText = searchText.Replace(metaCharacters[i], @"\" + metaCharacters[i]);
}
}
}
searchText = "^(" + searchText + ")$";
//Gets the list of indexes that match with the search text.
List <int> matchList = Regex.Matches(cellValue, searchText, this.AllowCaseSensitiveSearch ? RegexOptions.None : RegexOptions.IgnoreCase)
.Cast <Match>()
.Select(s => s.Index).ToList();
if (matchList.Count > 0 && bounds.Width > 0)
{
StringFormat format = new StringFormat(StringFormat.GenericDefault);
List <CharacterRange[]> characterRangeList = new List <CharacterRange[]>();
//Used 32 as CharacterRangeLength to avoid System.OverFlowExcepion
//in StringFormat.SetMeasurableCharacterRanges which occurs if the CharacterRange length is more than 32.
int characterRangeLength = 32;
int count = matchList.Count / characterRangeLength;
int range = matchList.Count % characterRangeLength;
int startIndex = 0;
if (count > 0)
{
for (int index = 0; index < count; index++)
{
CharacterRange[] characterRange = new CharacterRange[characterRangeLength];
for (int i = 0; i < characterRangeLength; i++)
{
characterRange[i] = new CharacterRange(matchList[startIndex], SearchText.Length);
startIndex++;
}
characterRangeList.Add(characterRange);
characterRange = null;
}
}
if (range > 0)
{
CharacterRange[] characterRange = new CharacterRange[range];
for (int i = 0; i < range; i++)
{
characterRange[i] = new CharacterRange(matchList[startIndex], SearchText.Length);
startIndex++;
}
characterRangeList.Add(characterRange);
characterRange = null;
}
//VerticalAlignment
format.LineAlignment = ConvertToStringAlignment(style.VerticalAlignment);
//HorizontalAlignment
format.Alignment = ConvertToStringAlignment(style.HorizontalAlignment);
if (!column.GridColumn.AllowTextWrapping)
{
format.FormatFlags = StringFormatFlags.NoWrap;
format.Trimming = column.GridColumn.TextTrimming;
}
if (DataGrid.RightToLeft == RightToLeft.Yes)
{
format.FormatFlags = StringFormatFlags.DirectionRightToLeft;
}
foreach (var characterRange in characterRangeList)
{
//Set the range of characters to be measured.
format.SetMeasurableCharacterRanges(characterRange);
//Gets the regions of the measurable characters applied to the string format for the given text with in the text bounds.
Region[] regions = paint.MeasureCharacterRanges(cellValue, style.GetFont(), bounds, format);
RectangleF[] fillRectangle = new RectangleF[regions.Length];
for (int i = 0; i < regions.Length; i++)
{
fillRectangle[i] = regions[i].GetBounds(paint);
}
var highlightColor = SearchColor;
if (this.CurrentRowColumnIndex == rowColumnIndex)
{
highlightColor = SearchHighlightColor;
}
// Highlights the search text based on the
using (Brush brush = new SolidBrush(highlightColor))
paint.FillRectangles(brush, fillRectangle);
}
characterRangeList.Clear();
characterRangeList = null;
matchList.Clear();
matchList = null;
}
}
}
