public FContrast(ChangeTracker changeTracker)
{
this.changeTracker = changeTracker;
InitializeComponent();
ContrastTransform = new ContrastTransform();
}
private void btnRevert_Click(object sender, EventArgs e)
{
ContrastTransform = new ContrastTransform();
tbContrast.Value = 0;
txtContrast.Text = tbContrast.Value.ToString("G");
UpdatePreviewBox();
}