public NSScrubberItemView GetViewForItem(NSScrubber scrubber, nint index)
{
ScrubberImage item = (ScrubberImage)scrubber.MakeItem("com.xamarin.scrubber.image", null);
// Tining each image causes lag, so cache and do off the main thread
// Using ScrubberImage instead of NSScrubberImageItemView since
// it does not handle setting Image later
NSImage image;
if (!imageCache.TryGetValue((int)index, out image))
{
var template = (NSImage)Xamargon.Copy();
Task.Factory.StartNew(() => {
var tintedImage = TintImage(template);
BeginInvokeOnMainThread(() => {
imageCache [(int)index] = tintedImage;
item.Image = tintedImage;
});
});
}
else
{
item.Image = image;
}
// Put a nice border around it
item.Layer.BorderColor = NSColor.DarkGray.CGColor;
item.Layer.BorderWidth = 2;
item.Layer.CornerRadius = 8;
item.Layer.MasksToBounds = true;
return(item);
}
public static NSImage Tint(this NSImage image, NSColor color)
{
var copy = image.Copy() as NSImage;
copy.LockFocus();
{
color.Set();
var imageRect = new CGRect(CGPoint.Empty, image.Size);
NSGraphics.RectFill(imageRect, NSCompositingOperation.SourceAtop);
}
copy.UnlockFocus();
return(copy);
}
// Based on http://stackoverflow.com/a/43235
NSImage TintImage(NSImage image)
{
int r = random.Next(128, 255);
int g = random.Next(128, 255);
int b = random.Next(128, 255);
NSColor baseColor = NSColor.White.UsingColorSpace(NSColorSpace.CalibratedRGB);
r = (int)(r + baseColor.RedComponent) / 2;
g = (int)(g + baseColor.GreenComponent) / 2;
b = (int)(b + baseColor.BlueComponent) / 2;
NSColor color = NSColor.FromRgb(r, g, b);
NSImage tintedImage = (NSImage)image.Copy();
tintedImage.LockFocus();
color.Set();
NSGraphics.RectFill(new CGRect(0, 0, image.Size.Width, image.Size.Height), NSCompositingOperation.SourceAtop);
tintedImage.UnlockFocus();
return(tintedImage);
}
/// <summary>
/// Combines two images into a new one, so that the "badge" image overlays the bottom-right quarter of the other image.
/// </summary>
/// <returns>The with badge.</returns>
/// <param name="icon">Background of the new image</param>
/// <param name="badge">Overlay image</param>
internal static NSImage IconWithBadge(NSImage icon, NSImage badge)
{
if (icon == null)
{
return(null);
}
if (badge == null)
{
return(icon);
}
var result = (NSImage)icon.Copy();
result.LockFocus();
NSGraphicsContext.CurrentContext.ImageInterpolation = NSImageInterpolation.High;
var dstRect = new CGRect(icon.Size.Width / 2, 0, icon.Size.Width / 2, icon.Size.Height / 2);
var srcRect = new CGRect(0, 0, badge.Size.Width, badge.Size.Height);
badge.DrawInRect(dstRect, srcRect, NSCompositingOperation.SourceOver, 1.0f);
result.UnlockFocus();
return(result);
}
public NSImage GetScreenshot()
{
if (View == null)
{
return(null);
}
NSImageView imageView = View.CastTo <NSImageView>();
if (imageView == null)
{
return(null);
}
NSImage image = imageView.Image;
if (image != null)
{
return(image.Copy <NSImage>().Autorelease <NSImage>());
}
return(null);
}
