/// <summary>
/// Executes the handler immediately if the element is loaded, otherwise wires it to the Loaded event.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
/// <returns>true if the handler was executed immediately; false otherwise</returns>
public static bool ExecuteOnLoad(FrameworkElement element, RoutedEventHandler handler)
{
#if XFORMS
handler(element, new RoutedEventArgs());
return(true);
#else
#if SILVERLIGHT
if ((bool)element.GetValue(IsLoadedProperty))
{
#elif WinRT
if (IsElementLoaded(element))
{
#else
if (element.IsLoaded)
{
#endif
handler(element, new RoutedEventArgs());
return(true);
}
RoutedEventHandler loaded = null;
loaded = (s, e) => {
element.Loaded -= loaded;
#if SILVERLIGHT
element.SetValue(IsLoadedProperty, true);
#endif
handler(s, e);
};
element.Loaded += loaded;
return(false);
#endif
}
/// <summary>
/// Executes the handler immediately if the element is loaded, otherwise wires it to the Loaded event.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
/// <returns>true if the handler was executed immediately; false otherwise</returns>
public static bool ExecuteOnLoad(FrameworkElement element, RoutedEventHandler handler)
{
#if XFORMS
handler(element, new RoutedEventArgs());
return(true);
#else
#if WINDOWS_UWP
if (IsElementLoaded(element))
{
#else
if (element.IsLoaded)
{
#endif
handler(element, new RoutedEventArgs());
return(true);
}
RoutedEventHandler loaded = null;
loaded = (s, e) => {
element.Loaded -= loaded;
handler(s, e);
};
element.Loaded += loaded;
return(false);
#endif
}
/// <summary>
/// Creates a binding on a <see cref="Parameter"/>.
/// </summary>
/// <param name="target">The target to which the message is applied.</param>
/// <param name="parameter">The parameter object.</param>
/// <param name="elementName">The name of the element to bind to.</param>
/// <param name="path">The path of the element to bind to.</param>
/// <param name="bindingMode">The binding mode to use.</param>
public static void BindParameter(FrameworkElement target, Parameter parameter, string elementName, string path, BindingMode bindingMode)
{
#if XFORMS
var element = elementName == "$this" ? target : null;
if (element == null)
{
return;
}
if (string.IsNullOrEmpty(path))
{
path = ConventionManager.GetElementConvention(element.GetType()).ParameterProperty;
}
var binding = new Binding(path)
{
Source = element,
Mode = bindingMode
};
parameter.SetBinding(Parameter.ValueProperty, binding);
#else
var element = elementName == "$this"
? target
: BindingScope.GetNamedElements(target).FindName(elementName);
if (element == null)
{
return;
}
if (string.IsNullOrEmpty(path))
{
path = ConventionManager.GetElementConvention(element.GetType()).ParameterProperty;
}
#if WINDOWS_UWP
var binding = new Binding
{
Path = new PropertyPath(path),
Source = element,
Mode = bindingMode
};
#else
var binding = new Binding(path)
{
Source = element,
Mode = bindingMode
};
#endif
#if !WINDOWS_UWP
binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
#endif
BindingOperations.SetBinding(parameter, Parameter.ValueProperty, binding);
#endif
}
public static void ExecuteOnLayoutUpdated(FrameworkElement element, EventHandler handler)
{
EventHandler onLayoutUpdate = null;
#endif
onLayoutUpdate = (s, e) => {
element.LayoutUpdated -= onLayoutUpdate;
handler(element, e);
};
element.LayoutUpdated += onLayoutUpdate;
}
/// <summary>
/// Executes the handler when the element is unloaded.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
public static void ExecuteOnUnload(FrameworkElement element, RoutedEventHandler handler)
{
#if !XFORMS
RoutedEventHandler unloaded = null;
unloaded = (s, e) => {
element.Unloaded -= unloaded;
handler(s, e);
};
element.Unloaded += unloaded;
#endif
}
void IAttachedObject.Attach(DependencyObject dependencyObject) {
#else
void IAttachedObject.Attach(FrameworkElement dependencyObject)
{
#endif
associatedObject = dependencyObject;
}
void IAttachedObject.Detach()
{
associatedObject = null;
}
void IAttachedObject.Attach(DependencyObject dependencyObject)
{
#else
void IAttachedObject.Attach(FrameworkElement dependencyObject)
{
#endif
associatedObject = dependencyObject;
}
void IAttachedObject.Detach()
{
associatedObject = null;
}
/// <summary>
/// Determines whether the specified <paramref name="element"/> is loaded.
/// </summary>
/// <param name="element">The element.</param>
/// <returns>true if the element is loaded; otherwise, false.
/// </returns>
public static bool IsElementLoaded(FrameworkElement element)
{
try
{
if ((element.Parent ?? VisualTreeHelper.GetParent(element)) != null)
{
return(true);
}
var rootVisual = Window.Current.Content;
if (rootVisual != null)
{
return(element == rootVisual);
}
return(false);
}
catch
{
return(false);
}
}
/// <summary>
/// Determines whether the specified <paramref name="element"/> is loaded.
/// </summary>
/// <param name="element">The element.</param>
/// <returns>true if the element is loaded; otherwise, false.
/// </returns>
public static bool IsElementLoaded(FrameworkElement element) {
try
{
if ((element.Parent ?? VisualTreeHelper.GetParent(element)) != null)
{
return true;
}
var rootVisual = Window.Current.Content;
if (rootVisual != null)
{
return element == rootVisual;
}
return false;
}
catch
{
return false;
}
}
/// <summary>
/// Executes the handler when the element is unloaded.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
public static void ExecuteOnUnload(FrameworkElement element, RoutedEventHandler handler) {
#if !XFORMS
RoutedEventHandler unloaded = null;
unloaded = (s, e) => {
element.Unloaded -= unloaded;
handler(s, e);
};
element.Unloaded += unloaded;
#endif
}
/// <summary>
/// Executes the handler immediately if the element is loaded, otherwise wires it to the Loaded event.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
/// <returns>true if the handler was executed immediately; false otherwise</returns>
public static bool ExecuteOnLoad(FrameworkElement element, RoutedEventHandler handler) {
#if XFORMS
handler(element, new RoutedEventArgs());
return true;
#else
#if SILVERLIGHT
if ((bool)element.GetValue(IsLoadedProperty)) {
#elif WinRT
if (IsElementLoaded(element)) {
#else
if(element.IsLoaded) {
#endif
handler(element, new RoutedEventArgs());
return true;
}
RoutedEventHandler loaded = null;
loaded = (s, e) => {
element.Loaded -= loaded;
#if SILVERLIGHT
element.SetValue(IsLoadedProperty, true);
#endif
handler(s, e);
};
element.Loaded += loaded;
return false;
#endif
}
/// <summary>
/// Executes the handler the next time the elements's LayoutUpdated event fires.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
#if WinRT
public static void ExecuteOnLayoutUpdated(FrameworkElement element, EventHandler <object> handler)
{
EventHandler <object> onLayoutUpdate = null;
/// <summary>
/// Executes the handler when the element is unloaded.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
#if NOESIS
public static void ExecuteOnUnload(FrameworkElement element, FrameworkElement.UnloadedHandler handler)
{
/// <summary>
/// Creates a binding on a <see cref="Parameter"/>.
/// </summary>
/// <param name="target">The target to which the message is applied.</param>
/// <param name="parameter">The parameter object.</param>
/// <param name="elementName">The name of the element to bind to.</param>
/// <param name="path">The path of the element to bind to.</param>
/// <param name="bindingMode">The binding mode to use.</param>
public static void BindParameter(FrameworkElement target, Parameter parameter, string elementName, string path, BindingMode bindingMode)
{
#if XFORMS
var element = elementName == "$this" ? target : null;
if (element == null)
{
return;
}
if (string.IsNullOrEmpty(path))
{
path = ConventionManager.GetElementConvention(element.GetType()).ParameterProperty;
}
var binding = new Binding(path)
{
Source = element,
Mode = bindingMode
};
parameter.SetBinding(Parameter.ValueProperty, binding);
#else
var element = elementName == "$this"
? target
: BindingScope.GetNamedElements(target).FindName(elementName);
if (element == null)
{
return;
}
if (string.IsNullOrEmpty(path))
{
path = ConventionManager.GetElementConvention(element.GetType()).ParameterProperty;
}
#if WinRT
var binding = new Binding
{
Path = new PropertyPath(path),
Source = element,
Mode = bindingMode
};
#else
var binding = new Binding(path)
{
Source = element,
Mode = bindingMode
};
#endif
#if (SILVERLIGHT && !SL5)
var expression = (BindingExpression)BindingOperations.SetBinding(parameter, Parameter.ValueProperty, binding);
var field = element.GetType().GetField(path + "Property", BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);
if (field == null)
{
return;
}
ConventionManager.ApplySilverlightTriggers(element, (DependencyProperty)field.GetValue(null), x => expression, null, null);
#else
#if !WinRT
binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
#endif
BindingOperations.SetBinding(parameter, Parameter.ValueProperty, binding);
#endif
#endif
}
/// <summary>
/// Executes the handler the next time the elements's LayoutUpdated event fires.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
#if WinRT
public static void ExecuteOnLayoutUpdated(FrameworkElement element, EventHandler<object> handler) {
EventHandler<object> onLayoutUpdate = null;
public static void ExecuteOnLayoutUpdated(FrameworkElement element, EventHandler handler) {
EventHandler onLayoutUpdate = null;
#endif
#if !XFORMS
onLayoutUpdate = (s, e) => {
element.LayoutUpdated -= onLayoutUpdate;
handler(element, e);
};
element.LayoutUpdated += onLayoutUpdate;
#endif
}
/// <summary>
/// Executes the handler immediately if the element is loaded, otherwise wires it to the Loaded event.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="handler">The handler.</param>
/// <returns>true if the handler was executed immediately; false otherwise</returns>
#if NOESIS
public static bool ExecuteOnLoad(FrameworkElement element, FrameworkElement.LoadedHandler handler)
{