public override void DrawRect(NSRect aRect)
{
// draw bars
if (iMaxValue > 0)
{
// draw the current value bar
NSColor colour = NSColor.ColorWithCalibratedRedGreenBlueAlpha(71.0f / 255.0f, 172.0f / 255.0f, 220.0f / 255.0f, 1.0f);
colour.SetStroke();
DrawArc(0, iValue, true);
// draw the preview bar
if (iPreviewEnabled)
{
colour = NSColor.ColorWithCalibratedRedGreenBlueAlpha(187.0f / 255.0f, 187.0f / 255.0f, 0.0f / 255.0f, 1.0f);
colour.SetStroke();
DrawArc(iValue, iPreviewValue, (iPreviewValue > iValue));
}
}
// draw text
if (iText != null)
{
NSMutableParagraphStyle style = new NSMutableParagraphStyle();
style.SetParagraphStyle(NSParagraphStyle.DefaultParagraphStyle);
style.SetAlignment(NSTextAlignment.NSCenterTextAlignment);
NSDictionary dict = NSDictionary.DictionaryWithObjectsAndKeys(FontManager.FontMedium, NSAttributedString.NSFontAttributeName,
style, NSAttributedString.NSParagraphStyleAttributeName,
NSColor.WhiteColor, NSAttributedString.NSForegroundColorAttributeName,
null);
style.Release();
NSSize size = iText.SizeWithAttributes(dict);
NSRect rect = new NSRect((Bounds.Width - size.width) * 0.5f, (Bounds.Height - size.height) * 0.5f, size.width, size.height);
iText.DrawInRectWithAttributes(rect, dict);
}
}