void RemoveBinding(BindableProperty property, BindablePropertyContext context)
{
context.Binding.Unapply();
if (property.BindingChanging != null)
{
property.BindingChanging(this, context.Binding, null);
}
context.Binding = null;
}
internal void SetBinding(BindableProperty targetProperty, BindingBase binding, bool fromStyle)
{
if (targetProperty == null)
{
throw new ArgumentNullException("targetProperty");
}
if (binding == null)
{
throw new ArgumentNullException("binding");
}
BindablePropertyContext context = null;
if (fromStyle && (context = GetContext(targetProperty)) != null && (context.Attributes & BindableContextAttributes.IsDefaultValue) == 0 &&
(context.Attributes & BindableContextAttributes.IsSetFromStyle) == 0)
{
return;
}
context = context ?? GetOrCreateContext(targetProperty);
if (fromStyle)
{
context.Attributes |= BindableContextAttributes.IsSetFromStyle;
}
else
{
context.Attributes &= ~BindableContextAttributes.IsSetFromStyle;
}
if (context.Binding != null)
{
context.Binding.Unapply();
}
BindingBase oldBinding = context.Binding;
context.Binding = binding;
if (targetProperty.BindingChanging != null)
{
targetProperty.BindingChanging(this, oldBinding, binding);
}
binding.Apply(BindingContext, this, targetProperty);
}