/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// userpreferencechangingeventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this UserPreferenceChangingEventHandler userpreferencechangingeventhandler, Object sender, UserPreferenceChangingEventArgs e, AsyncCallback callback)
{
if (userpreferencechangingeventhandler == null)
{
throw new ArgumentNullException("userpreferencechangingeventhandler");
}
return(userpreferencechangingeventhandler.BeginInvoke(sender, e, callback, null));
}
public void SignalsUserPreferenceEventsAsynchronouslyOnThemeChanged()
{
var changing = new AutoResetEvent(false);
var changed = new AutoResetEvent(false);
UserPreferenceChangingEventArgs changingArgs = null;
UserPreferenceChangingEventHandler changingHandler = (o, e) =>
{
changingArgs = e;
changing.Set();
};
List <UserPreferenceChangedEventArgs> changedArgs = new List <UserPreferenceChangedEventArgs>();
UserPreferenceChangingEventArgs changingDuringChanged = null;
UserPreferenceChangedEventHandler changedHandler = (o, e) =>
{
changedArgs.Add(e);
changingDuringChanged = changingArgs;
// signal test to continue after two events were recieved
if (changedArgs.Count > 1)
{
changed.Set();
}
};
SystemEvents.UserPreferenceChanging += changingHandler;
SystemEvents.UserPreferenceChanged += changedHandler;
try
{
SendMessage(User32.WM_THEMECHANGED, 0, null);
Assert.True(changing.WaitOne(PostMessageWait));
Assert.NotNull(changingArgs);
Assert.Equal(UserPreferenceCategory.VisualStyle, changingArgs.Category);
Assert.True(changed.WaitOne(PostMessageWait));
Assert.Equal(2, changedArgs.Count);
Assert.NotNull(changedArgs[0]);
Assert.Equal(UserPreferenceCategory.Window, changedArgs[0].Category);
Assert.NotNull(changedArgs[1]);
Assert.Equal(UserPreferenceCategory.VisualStyle, changedArgs[1].Category);
// changed must follow changing for VisualStyle
Assert.NotNull(changingDuringChanged);
Assert.Equal(UserPreferenceCategory.VisualStyle, changingDuringChanged.Category);
}
finally
{
SystemEvents.UserPreferenceChanging -= changingHandler;
SystemEvents.UserPreferenceChanged -= changedHandler;
changing.Dispose();
changed.Dispose();
}
}
public void SignalsUserPreferenceEventsSynchronouslyOnReflectedThemeChanged()
{
bool changing = false, changed = false;
UserPreferenceChangingEventArgs changingArgs = null;
UserPreferenceChangingEventHandler changingHandler = (o, e) =>
{
changingArgs = e;
changing = true;
};
List <UserPreferenceChangedEventArgs> changedArgs = new List <UserPreferenceChangedEventArgs>();
UserPreferenceChangingEventArgs changingDuringChanged = null;
UserPreferenceChangedEventHandler changedHandler = (o, e) =>
{
changedArgs.Add(e);
changingDuringChanged = changingArgs;
changed = true;
};
SystemEvents.UserPreferenceChanging += changingHandler;
SystemEvents.UserPreferenceChanged += changedHandler;
try
{
SendReflectedMessage(User32.WM_THEMECHANGED, 0, null);
Assert.True(changing);
Assert.NotNull(changingArgs);
Assert.Equal(UserPreferenceCategory.VisualStyle, changingArgs.Category);
Assert.True(changed);
Assert.Equal(2, changedArgs.Count);
Assert.NotNull(changedArgs[0]);
Assert.Equal(UserPreferenceCategory.Window, changedArgs[0].Category);
Assert.NotNull(changedArgs[1]);
Assert.Equal(UserPreferenceCategory.VisualStyle, changedArgs[1].Category);
// changed must follow changing for VisualStyle
Assert.NotNull(changingDuringChanged);
Assert.Equal(UserPreferenceCategory.VisualStyle, changingDuringChanged.Category);
}
finally
{
SystemEvents.UserPreferenceChanging -= changingHandler;
SystemEvents.UserPreferenceChanged -= changedHandler;
}
}
public void SignalsUserPreferenceEventsAsynchronously(int message, int uiAction, string area, UserPreferenceCategory expectedCategory)
{
var changing = new AutoResetEvent(false);
var changed = new AutoResetEvent(false);
UserPreferenceChangingEventArgs changingArgs = null;
UserPreferenceChangingEventHandler changingHandler = (o, e) =>
{
changingArgs = e;
changing.Set();
};
UserPreferenceChangedEventArgs changedArgs = null;
UserPreferenceChangingEventArgs changingDuringChanged = null;
UserPreferenceChangedEventHandler changedHandler = (o, e) =>
{
changedArgs = e;
changingDuringChanged = changingArgs;
changed.Set();
};
SystemEvents.UserPreferenceChanging += changingHandler;
SystemEvents.UserPreferenceChanged += changedHandler;
try
{
SendMessage(message, uiAction, area);
Assert.True(changing.WaitOne(PostMessageWait));
Assert.NotNull(changingArgs);
Assert.Equal(expectedCategory, changingArgs.Category);
Assert.True(changed.WaitOne(PostMessageWait));
Assert.NotNull(changedArgs);
Assert.Equal(expectedCategory, changedArgs.Category);
// changed must follow changing for the same category
Assert.NotNull(changingDuringChanged);
Assert.Equal(expectedCategory, changingDuringChanged.Category);
}
finally
{
SystemEvents.UserPreferenceChanging -= changingHandler;
SystemEvents.UserPreferenceChanged -= changedHandler;
changing.Dispose();
changed.Dispose();
}
}
public void SignalsUserPreferenceEventsSynchronously(int message, int uiAction, string area, UserPreferenceCategory expectedCategory)
{
bool changing = false, changed = false;
UserPreferenceChangingEventArgs changingArgs = null;
UserPreferenceChangingEventHandler changingHandler = (o, e) =>
{
changingArgs = e;
changing = true;
};
UserPreferenceChangedEventArgs changedArgs = null;
UserPreferenceChangingEventArgs changingDuringChanged = null;
UserPreferenceChangedEventHandler changedHandler = (o, e) =>
{
changedArgs = e;
changingDuringChanged = changingArgs;
changed = true;
};
SystemEvents.UserPreferenceChanging += changingHandler;
SystemEvents.UserPreferenceChanged += changedHandler;
try
{
SendReflectedMessage(message, uiAction, area);
Assert.True(changing);
Assert.NotNull(changingArgs);
Assert.Equal(expectedCategory, changingArgs.Category);
Assert.True(changed);
Assert.NotNull(changedArgs);
Assert.Equal(expectedCategory, changedArgs.Category);
// changed must follow changing for the same category
Assert.NotNull(changingDuringChanged);
Assert.Equal(expectedCategory, changingDuringChanged.Category);
}
finally
{
SystemEvents.UserPreferenceChanging -= changingHandler;
SystemEvents.UserPreferenceChanged -= changedHandler;
}
}
public static void add_UserPreferenceChanging(UserPreferenceChangingEventHandler value)
{
}
public static void add_UserPreferenceChanging (UserPreferenceChangingEventHandler value) {
}
