public void WeakEventManager_NullEventManager()
{
//Arrange
WeakEventManager unassignedEventManager = null;
//Act
//Assert
Assert.Throws <NullReferenceException>(() => unassignedEventManager.HandleEvent(null, null, nameof(TestEvent)));
}
public void HandleEvent()
{
tlog.Debug(tag, $"HandleEvent START");
try
{
var testingTarget = new WeakEventManager();
Assert.IsNotNull(testingTarget, "Can't create success object WeakEventManager.");
visibilityChangedEventHandler = (o, e) => { };
testingTarget.AddEventHandler <VisibilityChangedEventArgs>("visibilityChangedEventHandler", visibilityChangedEventHandler);
eventHandler = (o, e) => { };
testingTarget.AddEventHandler("eventHandler", eventHandler);
testingTarget.HandleEvent(null, new EventArgs(), "eventHandler");
testingTarget.HandleEvent(null, new VisibilityChangedEventArgs(), "visibilityChangedEventHandler");
}
catch (Exception e)
{
Assert.Fail("Catch exception: " + e.Message.ToString());
}
tlog.Debug(tag, $"HandleEvent END");
}
public void WeakEventManager_UnassignedEventManager()
{
//Arrange
var unassignedEventManager = new WeakEventManager();
bool didEventFire = false;
TestEvent += HandleTestEvent;
void HandleTestEvent(object sender, EventArgs e) => didEventFire = true;
//Act
unassignedEventManager.HandleEvent(null, null, nameof(TestEvent));
//Assert
Assert.IsFalse(didEventFire);
TestEvent -= HandleTestEvent;
}
public void WeakEventManagerTEventArgs_UnassignedEventManager()
{
//Arrange
var unassignedEventManager = new WeakEventManager <string>();
bool didEventFire = false;
TestStringEvent += HandleTestEvent;
void HandleTestEvent(object?sender, string e) => didEventFire = true;
//Act
#pragma warning disable CS8625 //Cannot convert null literal to non-nullable reference type
unassignedEventManager.HandleEvent(null, null, nameof(TestStringEvent));
#pragma warning enable CS8625
//Assert
Assert.IsFalse(didEventFire);
TestStringEvent -= HandleTestEvent;
}
void ConfigurationChanged(object sender, EventArgs e)
{
if (IsDuo)
{
_helper?.Update();
}
bool wasLandscape = IsLandscape;
Update();
bool screenChanged = false;
if (wasLandscape != IsLandscape)
{
screenChanged = true;
}
if (_mainActivity != null)
{
using (DisplayMetrics display = _mainActivity.Resources.DisplayMetrics)
{
var scalingFactor = display.Density;
_pixelScreenSize = new Size(display.WidthPixels, display.HeightPixels);
var newSize = new Size(_pixelScreenSize.Width / scalingFactor, _pixelScreenSize.Height / scalingFactor);
if (newSize != ScaledScreenSize)
{
ScaledScreenSize = newSize;
screenChanged = true;
}
}
}
if (screenChanged)
{
_onScreenChangedEventManager.HandleEvent(this, e, nameof(OnScreenChanged));
}
}
/// <summary> /// Raise a CanExecute change event. /// </summary> public void RaiseCanExecuteChanged() => weakEventManager.HandleEvent(this, EventArgs.Empty, nameof(CanExecuteChanged));
void OnCurrentSizeChanged(object sender, Windows.UI.Core.WindowSizeChangedEventArgs e)
{
_onScreenChangedEventManager.HandleEvent(this, EventArgs.Empty, nameof(OnScreenChanged));
}
void OnDeviceInfoChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
_onScreenChangedEventManager.HandleEvent(this, e, nameof(OnScreenChanged));
}
void OnDeviceInfoChanged(object sender, DisplayInfoChangedEventArgs e)
{
_onScreenChangedEventManager.HandleEvent(this, e, nameof(OnScreenChanged));
}
void OnTestEvent()
{
_weakEventManager.HandleEvent(this, EventArgs.Empty, nameof(TestEvent));
}