/// <summary>
/// Paints annotation object on specified graphics.
/// </summary>
/// <param name="graphics">
/// A <see cref="ChartGraphics"/> used to paint annotation object.
/// </param>
/// <param name="chart">
/// Reference to the <see cref="Chart"/> control.
/// </param>
override internal void Paint(Chart chart, ChartGraphics graphics)
{
// Get annotation position in relative coordinates
PointF firstPoint = PointF.Empty;
PointF anchorPoint = PointF.Empty;
SizeF size = SizeF.Empty;
GetRelativePosition(out firstPoint, out size, out anchorPoint);
PointF secondPoint = new PointF(firstPoint.X + size.Width, firstPoint.Y + size.Height);
// Create selection rectangle
RectangleF selectionRect = new RectangleF(firstPoint, new SizeF(secondPoint.X - firstPoint.X, secondPoint.Y - firstPoint.Y));
// Check if text position is valid
if (float.IsNaN(firstPoint.X) ||
float.IsNaN(firstPoint.Y) ||
float.IsNaN(secondPoint.X) ||
float.IsNaN(secondPoint.Y))
{
return;
}
// Get arrow shape path
using (GraphicsPath arrowPathAbs = GetArrowPath(graphics, selectionRect))
{
// Draw arrow shape
if (this.Common.ProcessModePaint)
{
graphics.DrawPathAbs(
arrowPathAbs,
(this.BackColor.IsEmpty) ? Color.White : this.BackColor,
this.BackHatchStyle,
String.Empty,
ChartImageWrapMode.Scaled,
Color.Empty,
ChartImageAlignmentStyle.Center,
this.BackGradientStyle,
this.BackSecondaryColor,
this.LineColor,
this.LineWidth,
this.LineDashStyle,
PenAlignment.Center,
this.ShadowOffset,
this.ShadowColor);
}
// Process hot region
if (this.Common.ProcessModeRegions)
{
// Use callout defined hot region
this.Common.HotRegionsList.AddHotRegion(
graphics,
arrowPathAbs,
false,
ReplaceKeywords(this.ToolTip),
String.Empty,
String.Empty,
String.Empty,
this,
ChartElementType.Annotation);
}
// Paint selection handles
PaintSelectionHandles(graphics, selectionRect, null);
}
}