private static void Style_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var frameworkElement = (FrameworkElement)d;
if (!frameworkElement.INTERNAL_DoNotApplyStyle)
{
Style newStyle = (Style)e.NewValue;
Style oldStyle = (Style)e.OldValue;
Dictionary <DependencyProperty, Setter> oldStyleDictionary = new Dictionary <DependencyProperty, Setter>();
if (oldStyle != null)
{
oldStyleDictionary = oldStyle.GetDictionaryOfSettersFromStyle();
}
Dictionary <DependencyProperty, Setter> newStyleDictionary = new Dictionary <DependencyProperty, Setter>();
if (newStyle != null)
{
newStyleDictionary = newStyle.GetDictionaryOfSettersFromStyle();
}
#if PERFSTAT
var t0 = Performance.now();
#endif
frameworkElement.RecursivelyUnregisterFromStyleChangedEvents(oldStyle);
#if PERFSTAT
Performance.Counter("RecursivelyUnregisterFromStyleChangedEvents", t0);
#endif
#if PERFSTAT
var t1 = Performance.now();
#endif
frameworkElement.RecursivelyRegisterToStyleChangedEvents(newStyle);
#if PERFSTAT
Performance.Counter("RecursivelyRegisterToStyleChangedEvents", t1);
#endif
foreach (Setter oldSetter in
#if BRIDGE
INTERNAL_BridgeWorkarounds.GetDictionaryValues_SimulatorCompatible(oldStyleDictionary)
#else
oldStyleDictionary.Values
#endif
)
{
if (oldSetter.Property != null) // Note: it can be null for example in the XAML text editor during design time, because the "DependencyPropertyConverter" class returns "null".
{
if (!newStyleDictionary.ContainsKey(oldSetter.Property))
{
INTERNAL_PropertyStorage storage = INTERNAL_PropertyStore.GetStorage(d, oldSetter.Property, createAndSaveNewStorageIfNotExists: false); //the createAndSaveNewStorageIfNotExists's value should have no actual meaning here because the PropertyStorage should have been created when applying the style.
INTERNAL_PropertyStore.ResetLocalStyleValue(storage);
}
}
// Reset the information that tells which Style the Setter belongs to (this is used so that when the Value of the Setter changes, the Setter can notify its parent Style):
oldSetter.INTERNAL_ParentStyle = null;
}
foreach (Setter newSetter in
#if BRIDGE
INTERNAL_BridgeWorkarounds.GetDictionaryValues_SimulatorCompatible(newStyleDictionary)
#else
newStyleDictionary.Values
#endif
)
{
if (newSetter.Property != null) // Note: it can be null for example in the XAML text editor during design time, because the "DependencyPropertyConverter" class returns "null".
{
if (!oldStyleDictionary.ContainsKey(newSetter.Property) || oldStyleDictionary[newSetter.Property] != newSetter.Value)
{
INTERNAL_PropertyStorage storage = INTERNAL_PropertyStore.GetStorage(frameworkElement, newSetter.Property, createAndSaveNewStorageIfNotExists: true); //the createAndSaveNewStorageIfNotExists's value should have no actual meaning here because the PropertyStorage should have been created when applying the style.
INTERNAL_PropertyStore.SetLocalStyleValue(storage, newSetter.Value);
}
}
// Tell the setter which Style it belongs to, so that when the Value of the Setter changes, it can notify the parent Style:
newSetter.INTERNAL_ParentStyle = newStyle;
}
}
}
