public static void DataContextChanged(object target, AttachedPropertyChangedEventArgs e)
 {
     if (e.NewValue != null)
     {
         // bind "target" to new value
         // target.Bind(e.NewValue, --template--)
         
         // how do we get the binding information for "target" in an easy manner
         // in xaml this would be defined in the view.  perhaps we do the same
         // by either using attributes on target or having the view register
         // perhaps the view can register define a way of binding
     }
 }
예제 #2
0
        public static void DataContextChanged(object target, AttachedPropertyChangedEventArgs e)
        {
            if (e.NewValue != null)
            {
                // bind "target" to new value
                // target.Bind(e.NewValue, --template--)

                // how do we get the binding information for "target" in an easy manner
                // in xaml this would be defined in the view.  perhaps we do the same
                // by either using attributes on target or having the view register
                // perhaps the view can register define a way of binding
            }
        }
예제 #3
0
 /// <summary>
 /// Handles changes to the attached object and calls Attach or Detatch
 /// </summary>
 /// <param name='targetObject'>
 /// The object to which we are attaching the behaviour
 /// </param>
 /// <param name='e'>
 /// The changed property arguments
 /// </param>
 public static void AttachedPropertyChanged(object targetObject, AttachedPropertyChangedEventArgs e)
 {
     var behaviour = targetObject as Behaviour;
     if (behaviour != null)
     {
         if (e.OldValue != null)
         {
             behaviour.Detach(e.OldValue);
         }
         
         behaviour.Attach(e.NewValue);
     }
 }
예제 #4
0
 /// <summary>
 /// Sets the value of an AttachedProperty for an object 
 /// </summary>
 /// <param name='instance'>
 /// The instance for which the value is being set
 /// </param>
 /// <param name='property'>
 /// The AttachedProperty that defines the value being set
 /// </param>
 /// <param name='value'>
 /// The value of the property
 /// </param>
 public static void SetValue(this object instance, AttachedProperty property, object value)
 {
     var current = GetCurrent(instance, property, true);
     
     var oldValue = current.Value;
     current.Value = value;  
     
     if (oldValue != value && property.Metadata.ChangeCallback != null)
     {
         var args = new AttachedPropertyChangedEventArgs(property, value, oldValue);
         
         property.Metadata.ChangeCallback(instance, args);
     }
 }
        /// <summary>
        /// Sets the value of an AttachedProperty for an object
        /// </summary>
        /// <param name='instance'>
        /// The instance for which the value is being set
        /// </param>
        /// <param name='property'>
        /// The AttachedProperty that defines the value being set
        /// </param>
        /// <param name='value'>
        /// The value of the property
        /// </param>
        public static void SetValue(this object instance, AttachedProperty property, object value)
        {
            var current = GetCurrent(instance, property, true);

            var oldValue = current.Value;

            current.Value = value;

            if (oldValue != value && property.Metadata.ChangeCallback != null)
            {
                var args = new AttachedPropertyChangedEventArgs(property, value, oldValue);

                property.Metadata.ChangeCallback(instance, args);
            }
        }