private void Control_AfterTextChanged(object sender, AfterTextChangedEventArgs e)
{
var element = ((TimeEntry)Element);
// 1. Stop listening for changes on our control Text property
if (!element.ShouldReactToTextChanges)
{
return;
}
element.ShouldReactToTextChanges = false;
// 2. Get the current cursor position
var cursorPosition = Control.SelectionStart;
// 3. Take the control’s text, lets name it oldText
var oldText = Control.Text;
// 4. Parse oldText into a number, lets name it number
var number = TimeEntry.DumbParse(oldText);
// 5. Format number, and place the formatted text in newText
var newText = $"{number:##:##}";
// 6. Set the Text property of our control to newText
Control.Text = newText;
// 7. Calculate the new cursor position
var change = oldText.Length - newText.Length;
// 8. Set the new cursor position
Control.SetSelection(cursorPosition - change);
// 9. Start listening for changes on our control’s Text property
element.ShouldReactToTextChanges = true;
