Add IsVisible Support for ToolbarItem in .NET MAUI

[eduardoagr]

One limitation in .NET MAUI today is that ToolbarItem does not expose an IsVisible property. This makes it difficult to conditionally show or hide toolbar items based on platform, idiom, or runtime state. Developers often resort to duplicating logic in code‑behind, which clutters pages and leads to duplication issues when navigating back and forth.

[bijington]

I think this needs be raised against MAUI rather than the toolkit?

You might be able to write something that binds to a collection and adds/removes items based on their visibility?

[eduardoagr]

Well, I made this, I do not know if this is what you want

`namespace SnapLabel.Controls;

public static class ToolbarItemExtensions {

public static readonly BindableProperty IsVisibleProperty =
    BindableProperty.Create(
        "IsVisible",
        typeof(bool),
        typeof(ToolbarItemExtensions),
        true,
        propertyChanged: OnIsVisibleChanged);

public static bool GetIsVisible(BindableObject view)
    => (bool)view.GetValue(IsVisibleProperty);

public static void SetIsVisible(BindableObject view, bool value)
    => view.SetValue(IsVisibleProperty, value);

private static void OnIsVisibleChanged(BindableObject bindable, object oldValue, object newValue) {
    if(bindable is not ToolbarItem item)
        return;

    // Always dispatch — ensures parent is attached and we're on the UI thread
    item.Dispatcher?.Dispatch(() => {
        if(item.Parent is not ContentPage page)
            return;

        bool visible = (bool)newValue;

        if(visible) {
            if(!page.ToolbarItems.Contains(item))
                page.ToolbarItems.Add(item);
        }
        else {
            page.ToolbarItems.Remove(item);
        }
    });
}

}`