mchSamples-MAUI/ch02_DesigningViews/ex_CustomToolbar/MainPage.xaml.cs

using CommunityToolkit.Maui.Behaviors;

namespace ex_CustomToolbar;

public partial class MainPage : ContentPage
{
	int count = 0;

	public MainPage()
	{
		InitializeComponent();
	}

	private void OnCounterClicked(object sender, EventArgs e)
	{
		count++;

		if (count == 1)
			CounterBtn.Text = $"Clicked {count} time";
		else
			CounterBtn.Text = $"Clicked {count} times";

		SemanticScreenReader.Announce(CounterBtn.Text);
	}

	void picker_SelectedIndexChanged(object source, EventArgs args)
    {
        string? chosenThemeString = picker.SelectedItem as string;

        ResourceDictionary chosenTheme = chosenThemeString switch 
        {
            "Dark" => new DarkTheme(),
            "Light" => new LightTheme(),
            "Color Blind" => new ColorBlindTheme(),
            _ => new LightTheme()
        };

		ICollection<ResourceDictionary> mergedDictionaries = Application.Current.Resources.MergedDictionaries;
        if (mergedDictionaries != null)
        {
            foreach(var dico in mergedDictionaries.Where(d => d is ICustomTheme).ToList())
            {
                mergedDictionaries.Remove(dico);
            }
            mergedDictionaries.Add(chosenTheme);

			#if ANDROID
			CommunityToolkit.Maui.Core.Platform.StatusBar.SetColor((Color)Application.Current.Resources["PrimaryBackgroundColor"]);
			#endif
        }
    }

	private void EllipsisClicked(object sender, EventArgs e)
	{
		secondaryMenu.IsVisible = !secondaryMenu.IsVisible;
	}

	private void BackgroundClicked(object sender, TappedEventArgs e)
	{
		secondaryMenu.IsVisible = false;
	}
}