I use this method to create a brush for drag & drop image. If columns spread through the whole/most of grid width the brush looks good, but if there's a lot of empty space after the last column, it is also included in the visual and then in the brush. How can I exclude it or reduce it to get only displayed columns in a brush? What element from the visual can I use as a root for the brush to only include relevant information (columns with values)? Thanks.

Ivan