/// <summary>
/// Raises this object's PropertyChanged event for one property and all its dependent
/// properties.
/// </summary>
/// <param name="propertyName">The name of the property that has a new value.</param>
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
// Verify that the notified property actually exists in the current object. This can
// reveal misspelled properties and missing notifications. It's only checked in Debug
// builds for performance and stability reasons.
#if DEBUG
if (!TypeDescriptor.GetProperties(this).OfType <PropertyDescriptor>().Any(d => d.Name == propertyName))
{
throw new ArgumentException("Notifying a change of non-existing property " + this.GetType().Name + "." + propertyName);
}
#endif
// Call On…Changed methods that are marked with the [PropertyChangedHandler] attribute
foreach (var changeHandler in PropertyChangedHandlers.GetValuesOrEmpty(propertyName))
{
changeHandler();
}
// Raise PropertyChanged event, if there is a handler listening to it
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
// Also notify changes for dependent properties
// (This could be moved inside the (handler != null) check for improved performance, but
// then it could miss out On…Changed method calls for dependent properties, which might
// be a nice feature.)
foreach (var dependentPropertyName in DependentNotifications.GetValuesOrEmpty(propertyName))
{
OnPropertyChanged(dependentPropertyName);
}
}
public HamburgerMenu()
{
DebugWrite();
if (Windows.ApplicationModel.DesignMode.DesignModeEnabled)
{
InitializeComponent();
}
else
{
// hamburger menu property changes
PropertyChangedHandlers.Add(nameof(IsFullScreen), e => FullScreenPropertyChanged((bool?)e.OldValue, (bool?)e.NewValue));
PropertyChangedHandlers.Add(nameof(Selected), e => SelectedPropertyChanged(e.OldValue as HamburgerButtonInfo, e.NewValue as HamburgerButtonInfo));
PropertyChangedHandlers.Add(nameof(DisplayMode), e => DisplayModePropertyChanged((SplitViewDisplayMode)e.OldValue, (SplitViewDisplayMode)e.NewValue));
PropertyChangedHandlers.Add(nameof(HamburgerButtonVisibility), e => HamburgerButtonVisibilityPropertyChanged((Visibility)e.NewValue));
PropertyChangedHandlers.Add(nameof(IsOpen), e => IsOpenPropertyChanged((bool)e.OldValue, (bool)e.NewValue));
PropertyChangedHandlers.Add(nameof(NavigationService), e => NavigationServicePropertyChanged(e.OldValue as INavigationService, e.NewValue as INavigationService));
PropertyChangedHandlers.Add(nameof(AccentColor), e => AccentColorPropertyChanged(e.OldValue as Color?, e.NewValue as Color?));
// default values;
PrimaryButtons = new ObservableCollection <HamburgerButtonInfo>();
SecondaryButtons = new ObservableCollection <HamburgerButtonInfo>();
// calling this now, let's handlers wire up before styles apply
InitializeComponent();
// control event handlers
Loaded += HamburgerMenu_Loaded;
LayoutUpdated += HamburgerMenu_LayoutUpdated;
KeyboardService.Instance.AfterMenuGesture += () => IsOpen = !IsOpen;
}
}
public HamburgerMenu()
{
DebugWrite();
if (Windows.ApplicationModel.DesignMode.DesignModeEnabled)
{
InitializeComponent();
}
else
{
// hamburger menu property changes
PropertyChangedHandlers.Add(nameof(IsFullScreen), e => FullScreenPropertyChanged((bool?)e.OldValue, (bool?)e.NewValue));
PropertyChangedHandlers.Add(nameof(Selected), e => SelectedPropertyChanged(e.OldValue as HamburgerButtonInfo, e.NewValue as HamburgerButtonInfo));
PropertyChangedHandlers.Add(nameof(DisplayMode), e => DisplayModePropertyChanged((SplitViewDisplayMode)e.OldValue, (SplitViewDisplayMode)e.NewValue));
PropertyChangedHandlers.Add(nameof(HamburgerButtonVisibility), e => HamburgerButtonVisibilityPropertyChanged((Visibility)e.NewValue));
PropertyChangedHandlers.Add(nameof(IsOpen), e => IsOpenPropertyChanged((bool)e.OldValue, (bool)e.NewValue));
PropertyChangedHandlers.Add(nameof(NavigationService), e => NavigationServicePropertyChanged(e.OldValue as INavigationService, e.NewValue as INavigationService));
PropertyChangedHandlers.Add(nameof(AccentColor), e => AccentColorPropertyChanged(e.OldValue as Color?, e.NewValue as Color?));
PropertyChangedHandlers.Add(nameof(HeaderContent), e => HeaderContentPropertyChanged(e.OldValue, e.NewValue));
// default values;
PrimaryButtons = new ObservableCollection <HamburgerButtonInfo>();
SecondaryButtons = new ObservableCollection <HamburgerButtonInfo>();
// calling this now, let's handlers wire up before styles apply
InitializeComponent();
// control event handlers
Loaded += HamburgerMenu_Loaded;
LayoutUpdated += HamburgerMenu_LayoutUpdated;
// xbox controller menu button support
KeyboardService.Instance.AfterMenuGesture += () =>
{
HamburgerCommand.Execute();
HamburgerButton.Focus(FocusState.Programmatic);
};
GotFocus += (s, e) =>
{
var element = FocusManager.GetFocusedElement() as FrameworkElement;
var name = element?.Name ?? "no-name";
var content = (((element as ContentControl)?.Content as StackPanel)?.Children[0] as SymbolIcon)?.Symbol.ToString();
if (content == null)
{
content = (element as ContentControl)?.Content?.ToString() ?? "no-content";
}
var value = $"{element?.ToString() ?? "null"} {name} {content}";
DebugWrite(value, caller: "GotFocus");
};
}
}
