protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var handleRectangleRadius = HandleHeight / 4;
var textRectangleRadius = HandleHeight / 2;
valueLabel.Text = $"{_value.ToString("F1")}{AdditionalText}";
valueLabel.Location = new Point(HandleWidth + textRectangleRadius, 1);
valueLabel.Size = new Size(Width - HandleWidth - 2 * textRectangleRadius, Height - 2);
var handleRectangle = new RectangleF(0, Height / 2.0F - HandleHeight / 2.0F, HandleWidth, HandleHeight);
var textRectangle = new Rectangle(HandleWidth, 0, Width - HandleWidth, Height);
var handlePath = GraphicsUtilities.CreateRoundedRectanglePath(handleRectangle, handleRectangleRadius);
var textPath = GraphicsUtilities.CreateRoundedRectanglePath(textRectangle, textRectangleRadius);
var graphics = e.Graphics;
graphics.SmoothingMode = SmoothingMode.AntiAlias;
using (var brush = new SolidBrush(BackColor))
{
graphics.FillPath(brush, handlePath);
graphics.FillPath(brush, textPath);
}
using (var pen = new Pen(BorderColor))
{
graphics.DrawPath(pen, handlePath);
graphics.DrawPath(pen, textPath);
}
using (var brush = new SolidBrush(BackColor))
{
var rect = handleRectangle;
rect.Inflate(2, -1);
rect.X += 3;
graphics.FillRectangle(brush, rect);
}
var region = GraphicsUtilities.GetRegionForPath(handlePath);
region.Union(GraphicsUtilities.GetRegionForPath(textPath));
Region = region;
}
