Unable to Crop image

[lordofscripts]

This is an excellent and versatile control, I am using the ImageBoxEx code (v1.1) extending the ImageBox v1.4 found in the latest NuGet package. I am using ImageBoxEx because I want to add some image editing capabilities to transform my image.

So far I get my image displayed, the selection regions are displayed and can be resized and moved. At some point though, I want to CROP the image using the SelectionRegion rectangle. I have the code to do the cropping which I have tested in a regular (stock) PictureBox control; However, this does not seem to be working with the ImageBox/Ex controls.

Basically I do this:

using (ImageProcessor imgProc = new ImageProcessor(imageBox1.Image))
{
  Rectangle rect = Rectangle.Round(imageBox1.SelectionRegion);
  imageBox1.SelectNone();
  imgProcessor.Crop(rect);
  imageBox1.Image = imgProcessor.CurrentImage;
}

where the Crop method looks like this:

public void Crop(Rectangle r)
{
   Bitmap temp = (Bitmap)_currentBitmap;   // this is where the bitmap was placed by the constructor
   Bitmap bmap = (Bitmap)temp.Clone();
   if (r.X + r.Width > _currentBitmap.Width)
       r.Width = _currentBitmap.Width - r.X;
   if (r.Y + r.Height > _currentBitmap.Height)
       r.Height = _currentBitmap.Height - r.Y;
   _currentBitmap = (Bitmap)bmap.Clone(r, bmap.PixelFormat);
}

But after I do that the imageBox image gets cleared from the ImageBoxEx control. If I eliminate the using() then the image remains the same as if I had not cropped it.

[lordofscripts]

Looking on the web I ran across another article from you that happened to do just that with your ImageBox: https://www.cyotek.com/blog/creating-an-image-viewer-in-csharp-part-5-selecting-part-of-an-image

I tried it that way and it worked. I don't know why the original approach works on the PictureBox but not on ImageBox, maybe because yours is more complex but MUCH more versatile! Excellent work by the way.