Utopia-Canteen-System/Views/AdminSettingsAuthView.xaml.cs

79 lines
2.4 KiB
C#

using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Threading;
using UtopiaCanteenSystem.ViewModels;
namespace UtopiaCanteenSystem.Views;
/// <summary>
/// Minimal code-behind for PasswordBox + initial focus.
/// </summary>
public partial class AdminSettingsAuthView : UserControl
{
private AdminSettingsAuthViewModel? _vm;
public AdminSettingsAuthView()
{
InitializeComponent();
Loaded += OnLoaded;
DataContextChanged += OnDataContextChanged;
}
private void OnLoaded(object sender, RoutedEventArgs e)
{
Dispatcher.BeginInvoke(() =>
{
// If VM has a remembered password, prefill the PasswordBox (it's not bindable).
if (DataContext is AdminSettingsAuthViewModel vm && !string.IsNullOrEmpty(vm.Password))
PasswordBox.Password = vm.Password;
UsernameTextBox.Focus();
UsernameTextBox.SelectAll();
}, DispatcherPriority.Input);
}
private void OnDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
if (_vm != null)
_vm.PropertyChanged -= VmOnPropertyChanged;
_vm = DataContext as AdminSettingsAuthViewModel;
if (_vm != null)
_vm.PropertyChanged += VmOnPropertyChanged;
// Sync PasswordBox from VM when navigating here (supports remembered creds).
if (_vm != null)
PasswordBox.Password = _vm.Password ?? string.Empty;
}
private void VmOnPropertyChanged(object? sender, PropertyChangedEventArgs e)
{
if (!string.Equals(e.PropertyName, nameof(AdminSettingsAuthViewModel.Password), StringComparison.Ordinal))
return;
if (_vm != null && string.IsNullOrEmpty(_vm.Password) && !string.IsNullOrEmpty(PasswordBox.Password))
PasswordBox.Password = string.Empty;
}
private void PasswordBox_OnPasswordChanged(object sender, RoutedEventArgs e)
{
if (DataContext is AdminSettingsAuthViewModel vm)
vm.Password = PasswordBox.Password;
}
private void Confirm_OnKeyDown(object sender, KeyEventArgs e)
{
if (e.Key != Key.Enter)
return;
if (DataContext is AdminSettingsAuthViewModel vm && vm.ConfirmCommand.CanExecute(null))
{
vm.ConfirmCommand.Execute(null);
e.Handled = true;
}
}
}