public override void Draw(Graphics gr, Point position, Range range)
{
//draw background
if (BackgroundBrush != null)
{
TextStyle.ConfigureForShapes(gr);
var rect = new Rectangle(position.X, position.Y, (range.End.iChar - range.Start.iChar) * range.tb.CharWidth, range.tb.CharHeight);
if (rect.Width == 0)
{
return;
}
gr.FillRectangle(BackgroundBrush, rect);
//
if (ForegroundBrush != null)
{
//draw text
TextStyle.ConfigureForText(gr);
var r = new Range(range.tb, range.Start.iChar, range.Start.iLine,
Math.Min(range.tb[range.End.iLine].Count, range.End.iChar), range.End.iLine);
using (var style = new TextStyle(ForegroundBrush, null, FontStyle.Regular))
style.Draw(gr, new Point(position.X, position.Y - 1), r);
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
if (target == null)
{
return;
}
var zoom = this.Scale * 100 / target.Zoom;
if (zoom <= float.Epsilon)
{
return;
}
//calc startPlace
var r = target.VisibleRange;
if (startPlace.iLine > r.Start.iLine)
{
startPlace.iLine = r.Start.iLine;
}
else
{
var endP = target.PlaceToPoint(r.End);
endP.Offset(0, -(int)(ClientSize.Height / zoom) + target.CharHeight);
var pp = target.PointToPlace(endP);
if (pp.iLine > startPlace.iLine)
{
startPlace.iLine = pp.iLine;
}
}
startPlace.iChar = 0;
//calc scroll pos
var linesCount = target.Lines.Count;
var sp1 = (float)r.Start.iLine / linesCount;
var sp2 = (float)r.End.iLine / linesCount;
//scale graphics
e.Graphics.ScaleTransform(zoom, zoom);
//draw text
var size = new SizeF(ClientSize.Width / zoom, ClientSize.Height / zoom);
target.DrawText(e.Graphics, startPlace, size.ToSize());
//draw visible rect
var p0 = target.PlaceToPoint(startPlace);
var p1 = target.PlaceToPoint(r.Start);
var p2 = target.PlaceToPoint(r.End);
var y1 = p1.Y - p0.Y;
var y2 = p2.Y + target.CharHeight - p0.Y;
TextStyle.ConfigureForText(e.Graphics);
using (var brush = new SolidBrush(Color.FromArgb(50, ForeColor)))
using (var pen = new Pen(brush, 1 / zoom))
{
var rect = new Rectangle(0, y1, (int)((ClientSize.Width - 1) / zoom), y2 - y1);
e.Graphics.FillRectangle(brush, rect);
e.Graphics.DrawRectangle(pen, rect);
}
//draw scrollbar
if (scrollbarVisible)
{
e.Graphics.ResetTransform();
TextStyle.ConfigureForShapes(e.Graphics);
using (var brush = new SolidBrush(Color.FromArgb(200, ForeColor)))
{
var rect = new RectangleF(ClientSize.Width - 3, ClientSize.Height * sp1, 2,
ClientSize.Height * (sp2 - sp1));
e.Graphics.FillRectangle(brush, rect);
}
}
needRepaint = false;
}