void DrawFoldMarker(Graphics g, RectangleF rectangle, bool isOpened, bool isSelected)
{
HighlightColor foldMarkerColor = textArea.Document.HighlightingStrategy.GetColorFor("FoldMarker");
HighlightColor foldLineColor = textArea.Document.HighlightingStrategy.GetColorFor("FoldLine");
HighlightColor selectedFoldLine = textArea.Document.HighlightingStrategy.GetColorFor("SelectedFoldLine");
Rectangle intRect = new Rectangle((int)rectangle.X, (int)rectangle.Y, (int)rectangle.Width, (int)rectangle.Height);
g.FillRectangle(BrushRegistry.GetBrush(foldMarkerColor.BackgroundColor), intRect);
g.DrawRectangle(BrushRegistry.GetPen(isSelected ? selectedFoldLine.Color : foldLineColor.Color), intRect);
int space = (int)Math.Round(((double)rectangle.Height) / 8d) + 1;
int mid = intRect.Height / 2 + intRect.Height % 2;
// draw minus
g.DrawLine(BrushRegistry.GetPen(foldMarkerColor.Color),
rectangle.X + space,
rectangle.Y + mid,
rectangle.X + rectangle.Width - space,
rectangle.Y + mid);
// draw plus
if (!isOpened) {
g.DrawLine(BrushRegistry.GetPen(foldMarkerColor.Color),
rectangle.X + mid,
rectangle.Y + space,
rectangle.X + mid,
rectangle.Y + rectangle.Height - space);
}
}
#endregion
