private Thickness calculateThickness(SudokuPresenter host)
{
var sudoku = host.Sudoku;
if (host.Sudoku == null)
{
return(new Thickness());
}
return(new Thickness(host.ElementBorderWidth));
}
public BorderThicknessUpdator(SudokuPresenter host)
{
if (host == null)
{
throw new ArgumentNullException("host");
}
this.host = host;
DependencyPropertyDescriptor.FromProperty(
SudokuPresenter.SudokuBorderWidthProperty,
typeof(SudokuPresenter))
.AddValueChanged(host, UpdateNeeded);
DependencyPropertyDescriptor.FromProperty(
SudokuPresenter.SudokuProperty,
typeof(SudokuPresenter))
.AddValueChanged(host, UpdateNeeded);
}
private void updateElementBorderThickness(SudokuPresenter host)
{
host.SetSudokuBorderThickness(calculateThickness(host));
}