/// <summary>
/// Returns an autoreleased NSImage, consisting of the selected portion of the reciever's image.
/// If there's no selection, this method will return the original image.
/// </summary>
public NSImage CroppedImage()
{
NSRect sourceImageRect = RectCoveredByImageInBounds(this.Cell.CastTo<NSImageCell>(), this.Bounds);
NSRect newImageBounds = NSRect.NSIntersectionRect(this.selectionMarker.SelectedRect, sourceImageRect);
if (!NSRect.NSIsEmptyRect(newImageBounds))
{
NSImage newImage = new NSImage(sourceImageRect.size);
NSAffineTransform pathAdjustment = NSAffineTransform.Transform;
NSBezierPath croppingPath = this.selectionMarker.SelectedPath;
pathAdjustment.TranslateXByYBy(-NSRect.NSMinX(sourceImageRect), -NSRect.NSMinY(sourceImageRect));
croppingPath = pathAdjustment.TransformBezierPath(croppingPath);
newImage.LockFocus();
NSGraphicsContext.CurrentContext.ShouldAntialias = this.shouldAntiAlias;
NSColor.BlackColor.Set();
croppingPath.Fill();
this.Image.CompositeToPointOperation(NSPoint.NSZeroPoint, NSCompositingOperation.NSCompositeSourceIn);
newImage.UnlockFocus();
newImage.Autorelease();
return newImage;
}
return this.Image;
}
public override void MouseDown(NSEvent theEvent)
{
NSPasteboard dragPasteboard = NSPasteboard.PasteboardWithName(NSPasteboard.NSDragPboard);
NSImage dragImage = new NSImage(this.Image.Size);
dragPasteboard.DeclareTypesOwner(NSArray.ArrayWithObject(NSPasteboard.NSTIFFPboardType), this);
dragPasteboard.AddTypesOwner(NSArray.ArrayWithObject(NSPasteboard.NSPDFPboardType), this);
dragImage.LockFocus();
this.Image.DissolveToPointFraction(NSPoint.NSZeroPoint, 0.5f);
dragImage.UnlockFocus();
dragImage.ScalesWhenResized = true;
dragImage.Size = this.Bounds.size;
this.DragImageAtOffsetEventPasteboardSourceSlideBack(dragImage,
this.Bounds.origin,
NSSize.NSZeroSize,
theEvent,
dragPasteboard,
this,
true);
dragImage.Release();
}