/// <summary>
/// 获得焦点时更新要显示的文本
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnGotFocus(object sender, RoutedEventArgs e)
{
MaskBoxState state = SaveState();
_maskManager.UpdateTextAndValue(false);
// 重置光标位置
_tb.SelectionLength = 0;
_tb.SelectionStart = (state.SelectionStart == state.Text.Length) ? Text.Length : state.SelectionStart;
}
/// <summary>
/// 保存当前文本框的状态
/// </summary>
/// <returns></returns>
MaskBoxState SaveState()
{
MaskBoxState state = new MaskBoxState();
state.SelectionLength = _tb.SelectionLength;
state.SelectionStart = _tb.SelectionStart;
state.Text = Text;
return(state);
}
/// <summary>
/// 键盘按下事件处理
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnKeyDown(object sender, KeyRoutedEventArgs e)
{
_inputManager.OnPreviewKeyDown(e);
_isSavedStateValid = !e.Handled;
if (_isSavedStateValid)
{
// 保存文本框当前状态
_savedState = SaveState();
}
}
/// <summary>
/// 加载文本框状态
/// </summary>
/// <param name="p_state"></param>
void RestoreState(MaskBoxState p_state)
{
if (p_state.Text == _tb.Text)
{
return;
}
_tb.TextChanged -= OnTextChanged;
_tb.Text = p_state.Text;
_tb.Select(p_state.SelectionStart, p_state.SelectionLength);
_tb.TextChanged += OnTextChanged;
RaiseTextChanged(null);
}
