New WinoListView implementation with multiple selections.

2025-10-26 14:53:22 +01:00
parent d4c8ae6cb7
commit 79d5b6ed40
22 changed files with 748 additions and 480 deletions
@@ -0,0 +1,103 @@
+using CommunityToolkit.Mvvm.Messaging;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Media;
+using Wino.Mail.ViewModels.Data;
+using Wino.Messaging.Client.Mails;
+
+namespace Wino.Mail.WinUI.Controls.ListView;
+
+public partial class WinoListViewItem : ListViewItem
+{
+    public bool IsExpanded
+    {
+        get { return (bool)GetValue(IsExpandedProperty); }
+        set { SetValue(IsExpandedProperty, value); }
+    }
+
+    public static readonly DependencyProperty IsExpandedProperty = DependencyProperty.Register(nameof(IsExpanded), typeof(bool), typeof(WinoListViewItem), new PropertyMetadata(false, OnIsExpandedChanged));
+
+    public WinoListViewItem()
+    {
+        DefaultStyleKey = typeof(WinoListViewItem);
+
+        RegisterPropertyChangedCallback(IsSelectedProperty, OnIsSelectedChanged);
+    }
+
+    private static void OnIsExpandedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        if (d is WinoListViewItem item)
+        {
+            // Handle expansion state change if needed
+        }
+    }
+
+    protected override void OnContentChanged(object oldContent, object newContent)
+    {
+        base.OnContentChanged(oldContent, newContent);
+
+        if (oldContent is IMailListItem oldMailItem)
+        {
+            UnregisterSelectionCallback(oldMailItem);
+        }
+
+        if (newContent is IMailListItem newMailItem)
+        {
+            IsSelected = newMailItem.IsSelected;
+            RegisterSelectionCallback(newMailItem);
+        }
+    }
+
+    private void UnregisterSelectionCallback(IMailListItem mailItem)
+    {
+        mailItem.PropertyChanged -= MailPropChanged;
+    }
+
+    private void RegisterSelectionCallback(IMailListItem mailItem)
+    {
+        mailItem.PropertyChanged += MailPropChanged;
+    }
+
+    // From model
+    private void MailPropChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
+    {
+        if (sender is not IMailListItem mailItem) return;
+
+        if (e.PropertyName == nameof(IMailListItem.IsSelected)) ApplySelectionForContainer(mailItem);
+    }
+
+    // From container.
+    private void OnIsSelectedChanged(DependencyObject sender, DependencyProperty dp)
+    {
+        if (Content is IMailListItem mailItem)
+        {
+            ApplySelectionForModel(mailItem);
+        }
+    }
+
+    private void ApplySelectionForModel(IMailListItem mailItem)
+    {
+        if (mailItem.IsSelected != IsSelected)
+        {
+            mailItem.IsSelected = IsSelected;
+            WeakReferenceMessenger.Default.Send(new SelectedItemsChangedMessage());
+        }
+    }
+
+    private void ApplySelectionForContainer(IMailListItem mailItem)
+    {
+        if (IsSelected != mailItem.IsSelected)
+        {
+            IsSelected = mailItem.IsSelected;
+        }
+    }
+
+    public WinoListView? GetWinoListViewControl()
+    {
+        var expander = GetTemplateChild("ExpanderPart") as Expander;
+
+        if (expander?.Content is ContentPresenter presenter) return VisualTreeHelper.GetChild(presenter, 0) as WinoListView;
+
+        return null;
+    }
+}