private void DrawHandles(PaintEventArgs e, BrightnessSelectorHandle handle)
{
var range1Rect = handle.GetHandleRangeRectangle(ClientRectangle, HalfHandleSizeX / 2, HalfHandleSizeY / 2, true,
PerBulb ? handle.HandleNumber : 1, HandleCount, handle.HandleNumber);
var r1Centre = new System.Drawing.Point(range1Rect.X + range1Rect.Width / 2, range1Rect.Y);
var range2Rect = handle.GetHandleRangeRectangle(ClientRectangle, HalfHandleSizeX / 2, HalfHandleSizeY / 2, false,
PerBulb ? handle.HandleNumber : 1, HandleCount, handle.HandleNumber);
var r2Centre = new System.Drawing.Point(range2Rect.X + range2Rect.Width / 2, range2Rect.Y + range1Rect.Height);
e.Graphics.DrawLine(Pens.Black, r1Centre, r2Centre);
var handleBrush = new SolidBrush(Color.FromArgb(224, 128, 128, 255));
DrawHandle(e, handle, false, handleBrush, range1Rect);
DrawHandle(e, handle, false, handleBrush, range2Rect);
handleBrush = new SolidBrush(Color.FromArgb(224, 128, 255, 128));
DrawHandle(e, handle, true, handleBrush,
handle.GetHandleRectangle(ClientRectangle, HalfHandleSizeX, HalfHandleSizeY,
PerBulb ? handle.HandleNumber : 1, HandleCount, handle.HandleNumber));
}
private void DrawHandle(PaintEventArgs e, BrightnessSelectorHandle handle, bool label, SolidBrush handleBrush,
Rectangle handleRect)
{
e.Graphics.FillEllipse(handleBrush, handleRect);
e.Graphics.DrawEllipse(Pens.Black, handleRect);
if (label)
{
using (var font1 = new Font("Segoe UI", ClientRectangle.Width / 12, System.Drawing.FontStyle.Bold, GraphicsUnit.Point))
{
var stringFormat = new StringFormat
{
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
};
e.Graphics.DrawString(handle.HandleNumber.ToString(), font1, Brushes.White, handleRect, stringFormat);
}
}
}