/// <summary>
/// <para>Returns the height and width resulting from a transformation of an existing height and width.</para>
/// <para>Original signature is : CGSize CGSizeApplyAffineTransform ( CGSize size, CGAffineTransform t );</para>
/// <para>Available in Mac OS X version 10.0 and later.</para>
/// </summary>
/// <param name="size">A size that specifies the height and width to transform.</param>
/// <param name="t">The affine transform to apply.</param>
/// <returns>A new size resulting from applying the specified affine transform to the existing size.</returns>
public static CGSize CGSizeApplyAffineTransform (CGSize size, CGAffineTransform t)
{
return new CGSize (
t.a * size.width + t.c * size.height + t.tx,
t.b * size.width + t.d * size.height + t.ty
);
}
public void SetOffsetFromPoint(NSPoint point)
{
CGSize offset;
NSRect bounds = this.Bounds;
offset.width = (point.x - NSRect.NSMidX(bounds))/(NSRect.NSWidth(bounds)/2);
offset.height = (point.y - NSRect.NSMidY(bounds))/(NSRect.NSHeight(bounds)/2);
float radius = (float) Math.Sqrt(offset.width*offset.width + offset.height*offset.height);
if (radius > 1)
{
offset.width /= radius;
offset.height /= radius;
}
if (CGSize.CGSizeEqualToSize(this._offset, offset) == 0)
{
this._offset = offset;
this.NeedsDisplay = true;
NSNotificationCenter.DefaultCenter.PostNotificationNameObject(ShadowOffsetChanged, this);
}
}
public override Id InitWithFrame(NSRect frame)
{
this.NativePointer = this.SendMessageSuper<IntPtr>(ShadowOffsetViewClass, "initWithFrame:", frame);
this._offset = CGSize.CGSizeZero;
return this;
}
/// <summary>
/// Converts a <see cref="CGSize"/> instance to a <see cref="NSSize"/>
/// </summary>
/// <param name="cgsize">The <see cref="CGSize"/> to convert.</param>
/// <returns>A new <see cref="NSSize"/> instance.</returns>
public static NSSize NSSizeFromCGSize(CGSize cgsize)
{
return NSMakeSize(cgsize.width, cgsize.height);
}
/// <summary>
/// Translates the point by the specified size.
/// </summary>
/// <param name="cgPoint">A point.</param>
/// <param name="cgSize">A size.</param>
/// <returns></returns>
public static CGPoint Substract(CGPoint cgPoint, CGSize cgSize)
{
return new CGPoint(cgPoint.x - cgSize.width, cgPoint.y - cgSize.height);
}
/// <summary>
/// Translates the point by the specified size.
/// </summary>
/// <param name="cgPoint">A point.</param>
/// <param name="cgSize">A size.</param>
/// <returns></returns>
public static CGPoint Add(CGPoint cgPoint, CGSize cgSize)
{
return new CGPoint(cgPoint.x + cgSize.width, cgPoint.y + cgSize.height);
}
