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using System;
using System.Windows.Input;
namespace Xamarin.Forms
{
public sealed class TapGestureRecognizer : GestureRecognizer
{
public static readonly BindableProperty CommandProperty = BindableProperty.Create("Command", typeof(ICommand), typeof(TapGestureRecognizer), null);
public static readonly BindableProperty CommandParameterProperty = BindableProperty.Create("CommandParameter", typeof(object), typeof(TapGestureRecognizer), null);
public static readonly BindableProperty NumberOfTapsRequiredProperty = BindableProperty.Create("NumberOfTapsRequired", typeof(int), typeof(TapGestureRecognizer), 1);
public TapGestureRecognizer()
{
}
public ICommand Command
{
get { return (ICommand)GetValue(CommandProperty); }
set { SetValue(CommandProperty, value); }
}
public object CommandParameter
{
get { return GetValue(CommandParameterProperty); }
set { SetValue(CommandParameterProperty, value); }
}
public int NumberOfTapsRequired
{
get { return (int)GetValue(NumberOfTapsRequiredProperty); }
set { SetValue(NumberOfTapsRequiredProperty, value); }
}
public event EventHandler Tapped;
internal void SendTapped(View sender)
{
ICommand cmd = Command;
if (cmd != null && cmd.CanExecute(CommandParameter))
cmd.Execute(CommandParameter);
EventHandler handler = Tapped;
if (handler != null)
handler(sender, new TappedEventArgs(CommandParameter));
#pragma warning disable 0618 // retain until TappedCallback removed
Action<View, object> callback = TappedCallback;
if (callback != null)
callback(sender, TappedCallbackParameter);
#pragma warning restore
}
#region obsolete cruft
// call empty constructor to hack around bug in mono where compiler generates invalid IL
[Obsolete("Obsolete in 1.0.2. Use Command instead")]
public TapGestureRecognizer(Action<View, object> tappedCallback) : this()
{
if (tappedCallback == null)
throw new ArgumentNullException("tappedCallback");
TappedCallback = tappedCallback;
}
// call empty constructor to hack around bug in mono where compiler generates invalid IL
[Obsolete("Obsolete in 1.0.2. Use Command instead")]
public TapGestureRecognizer(Action<View> tappedCallback) : this()
{
if (tappedCallback == null)
throw new ArgumentNullException("tappedCallback");
TappedCallback = (s, o) => tappedCallback(s);
}
[Obsolete("Obsolete in 1.0.2. Use Command instead")] public static readonly BindableProperty TappedCallbackProperty = BindableProperty.Create("TappedCallback", typeof(Action<View, object>),
typeof(TapGestureRecognizer), null);
[Obsolete("Obsolete in 1.0.2. Use Command instead")]
public Action<View, object> TappedCallback
{
get { return (Action<View, object>)GetValue(TappedCallbackProperty); }
set { SetValue(TappedCallbackProperty, value); }
}
[Obsolete("Obsolete in 1.0.2. Use Command instead")] public static readonly BindableProperty TappedCallbackParameterProperty = BindableProperty.Create("TappedCallbackParameter", typeof(object),
typeof(TapGestureRecognizer), null);
[Obsolete("Obsolete in 1.0.2. Use Command instead")]
public object TappedCallbackParameter
{
get { return GetValue(TappedCallbackParameterProperty); }
set { SetValue(TappedCallbackParameterProperty, value); }
}
#endregion
}
}
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