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feat: add selection change event.

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This commit is contained in:
rabbitism
2024-02-14 21:07:28 +08:00
parent 2918edbe0e
commit cfb728c9e9
3 changed files with 31 additions and 13 deletions
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28
src/Ursa/Controls/NavMenu/NavMenu.cs
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@@ -135,6 +135,14 @@ public class NavMenu: ItemsControl
public static void SetCanToggle(InputElement obj, bool value) => obj.SetValue(CanToggleProperty, value);
public static bool GetCanToggle(InputElement obj) => obj.GetValue(CanToggleProperty);
public static readonly RoutedEvent<SelectionChangedEventArgs> SelectionChangedEvent = RoutedEvent.Register<NavMenu, SelectionChangedEventArgs>(nameof(SelectionChanged), RoutingStrategies.Bubble);
public event EventHandler<SelectionChangedEventArgs>? SelectionChanged
{
add => AddHandler(SelectionChangedEvent, value);
remove => RemoveHandler(SelectionChangedEvent, value);
}
static NavMenu()
{
SelectedItemProperty.Changed.AddClassHandler<NavMenu, object?>((o, e) => o.OnSelectedItemChange(e));
@@ -169,11 +177,20 @@ public class NavMenu: ItemsControl
/// <param name="args"></param>
private void OnSelectedItemChange(AvaloniaPropertyChangedEventArgs<object?> args)
{
if (_updateFromUI) return;
SelectionChangedEventArgs a = new SelectionChangedEventArgs(
SelectionChangedEvent,
new [] { args.OldValue.Value },
new [] { args.NewValue.Value });
if (_updateFromUI)
{
RaiseEvent(a);
return;
}
var newValue = args.NewValue.Value;
if (newValue is null)
{
ClearAll();
RaiseEvent(a);
return;
}
var leaves = GetLeafMenus();
@@ -186,8 +203,11 @@ public class NavMenu: ItemsControl
found = true;
}
}
if (found) return;
ClearAll();
if (!found)
{
ClearAll();
}
RaiseEvent(a);
}
protected override bool NeedsContainerOverride(object? item, int index, out object? recycleKey)
@@ -205,7 +225,6 @@ public class NavMenu: ItemsControl
internal void SelectItem(NavMenuItem item, NavMenuItem parent)
{
_updateFromUI = true;
// if (item.IsSelected) return;
foreach (var child in LogicalChildren)
{
if (child == parent)
@@ -226,7 +245,6 @@ public class NavMenu: ItemsControl
SelectedItem = item;
}
item.BringIntoView();
// item.IsSelected = true;
_updateFromUI = false;
}