121 строка
3.1 KiB
C#
121 строка
3.1 KiB
C#
using Xamarin.Forms.CustomAttributes;
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using Xamarin.Forms.Internals;
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using System.Linq;
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#if UITEST
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using Xamarin.UITest;
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using NUnit.Framework;
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#endif
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// Apply the default category of "Issues" to all of the tests in this assembly
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// We use this as a catch-all for tests which haven't been individually categorized
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#if UITEST
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[assembly: NUnit.Framework.Category("Issues")]
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#endif
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namespace Xamarin.Forms.Controls.Issues
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{
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public class Bugzilla41054NumericValidationBehavior : Behavior<Entry>
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{
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public static readonly BindableProperty AttachBehaviorProperty =
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BindableProperty.CreateAttached("AttachBehavior", typeof(bool), typeof(Bugzilla41054NumericValidationBehavior), false, propertyChanged: OnAttachBehaviorChanged);
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public static bool GetAttachBehavior(BindableObject view)
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{
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return (bool)view.GetValue(AttachBehaviorProperty);
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}
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public static void SetAttachBehavior(BindableObject view, bool value)
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{
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view.SetValue(AttachBehaviorProperty, value);
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}
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static void OnAttachBehaviorChanged(BindableObject view, object oldValue, object newValue)
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{
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var entry = view as Entry;
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if (entry == null)
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{
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return;
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}
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bool attachBehavior = (bool)newValue;
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if (attachBehavior)
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{
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entry.Behaviors.Add(new Bugzilla41054NumericValidationBehavior());
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}
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else
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{
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var toRemove = entry.Behaviors.FirstOrDefault(b => b is Bugzilla41054NumericValidationBehavior);
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if (toRemove != null)
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{
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entry.Behaviors.Remove(toRemove);
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}
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}
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}
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protected override void OnAttachedTo(Entry entry)
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{
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entry.TextChanged += OnEntryTextChanged;
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base.OnAttachedTo(entry);
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}
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protected override void OnDetachingFrom(Entry entry)
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{
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entry.TextChanged -= OnEntryTextChanged;
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base.OnDetachingFrom(entry);
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}
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void OnEntryTextChanged(object sender, TextChangedEventArgs args)
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{
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double result;
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bool isValid = double.TryParse(args.NewTextValue, out result);
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((Entry)sender).TextColor = isValid ? Color.Default : Color.Red;
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}
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}
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#if UITEST
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[NUnit.Framework.Category(Core.UITests.UITestCategories.Bugzilla)]
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#endif
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[Preserve(AllMembers = true)]
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[Issue(IssueTracker.Bugzilla, 41054, "Cannot update Entry.Text from attached Behavior on UWP", PlatformAffected.Default)]
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public class Bugzilla41054 : TestContentPage
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{
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protected override void Init()
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{
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var entry = new Entry
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{
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Placeholder = "Enter a System.Double; text will be red when invalid",
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PlaceholderColor = Color.Green,
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};
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var entry2 = new Entry
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{
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Placeholder = "This entry starts with blue text when typing",
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TextColor = Color.Blue
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};
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Bugzilla41054NumericValidationBehavior.SetAttachBehavior(entry, true);
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Content = new StackLayout
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{
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Children = {
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entry,
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entry2,
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new Entry
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{
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Text = "This is an entry with some default colored text"
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},
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new Button
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{
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Text = "Change first entry placeholder color to purple",
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Command = new Command(() => entry.PlaceholderColor = Color.Purple)
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},
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new Button
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{
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Text = "Change second entry text color to orange",
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Command = new Command(() => entry2.TextColor = Color.Orange)
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}
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}
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};
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}
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}
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}
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