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using System.Diagnostics;
using System.Threading.Tasks;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
namespace Xamarin.Forms.Controls
{
[Preserve (AllMembers=true)]
[Issue (IssueTracker.Github, 2339, "Picker not shown when .Focus() is called", PlatformAffected.WinPhone)]
public class Issue2339 : ContentPage
{
public Issue2339 ()
{
var picker = new Picker { Items = {"One", "Two", "Three"} };
var pickerBtn = new Button {
Text = "Click me to call .Focus on Picker"
};
pickerBtn.Clicked += (sender, args) => {
picker.Focus ();
};
var pickerBtn2 = new Button {
Text = "Click me to call .Unfocus on Picker"
};
pickerBtn2.Clicked += (sender, args) => {
picker.Unfocus ();
};
var pickerBtn3 = new Button {
Text = "Click me to .Focus () picker, wait 2 seconds, and .Unfocus () picker",
Command = new Command (async () => {
picker.Focus ();
await Task.Delay (2000);
picker.Unfocus ();
})
};
var focusFiredCount = 0;
var unfocusFiredCount = 0;
var focusFiredLabel = new Label { Text = "Picker Focused: " + focusFiredCount };
var unfocusedFiredLabel = new Label { Text = "Picker UnFocused: " + unfocusFiredCount };
picker.Focused += (s, e) => {
focusFiredCount++;
focusFiredLabel.Text = "Picker Focused: " + focusFiredCount;
};
picker.Unfocused += (s, e) => {
unfocusFiredCount++;
unfocusedFiredLabel.Text = "Picker UnFocused: " + unfocusFiredCount;
};
Content = new StackLayout {
Children = {
focusFiredLabel,
unfocusedFiredLabel,
pickerBtn,
pickerBtn2,
pickerBtn3,
picker
}
};
}
}
}
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